Mitsubishi Electric City Multi CMH-WM250V-A Service Handbook Download Page 322

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[8-11 Control Circuit ]

BS_08_E

chapter 8 -

8 Troub

sho

oting Bas

ed on Ob

ser

ved

toms

3) CMH-WM250 - WM500V-A

YES

8-12 VDC

Fuse F4 is blown.

YES

24-30 VDC

YES

24-30 VDC

YES

Fuse F4 is

blown.

Check the voltage at the indoor/outdoor
transmission terminal block (TB3) of outdoor unit.

Check whether the transmission line is disconnected,
check for contact failure, and repair the problem.

Check if the indoor/outdoor transmission line is
not short-circuited, and repair the problem.

Check the wiring between the control board and
power-supply board, and also check connectors CNPW,
CNPS, CN202, and CNINT for proper connections.

Correct wiring problems, and tighten loose connectors.

Disconnect CN1 on the noise filter board,
replace F4, and turn on the power supply.

Check the voltage at TB3 after removing
transmission line from TB3.

Check whether the male connector is connected to the
female power supply connector (CN40).

Connected

Check voltage of terminal block for centralized control (TB7).

Check voltage of TB7 by removing transmission line from TB7.

Check the voltage across pins 3 and 4 of CNPW on the control board.

Check the voltage across pins 1 and 2 of CNPW on the control board.

Check the voltage across pins 1 and 2 of CN600 on the control board.

Check the wiring between the control board and
power-supply board, and also check connectors
CN600 and CNDC for proper connections.

Check the wiring between the noise filter board and
power-supply board, and also check connectors
CN1 and CN100 for proper connections.

Fix the wiring and connector
disconnection.

Correct wiring problems, and
tighten loose connectors.

Check for shorted transmission
line or power feed collision for
centralized control.

Replace the control board.

YES

Any problems with wiring or

loose connectors?

Is there a wiring

error or a connector

disconnection?

Check the voltage across pins 4-1 of CNPS on the control board.

YES

Replace the noise filter.

Replace the control board.

Replace the power-supply board.

3.25-3.35 VDC

Check fuse F4 on the noise filter board.

YES

Replace the power-supply board.

Any problems with wiring or

loose connectors?

Any problems

with wiring or loose

connectors?

0000004986.BOOK 67 ページ２０１９年５月９日　木曜日　午後６時２２分

Summary of Contents for City Multi CMH-WM250V-A

Page 1: ......

Page 2: ...lec tric shock malfunction smoke or fire Do not change the settings of the safety or protection devices Forcing the unit to operate by disabling the safety de vices such as the pressure switch or the thermal switch may result in bursting fire or explosion Operating the unit with a safety device whose settings have been changed may result in bursting fire or ex plosion Using safety devices other th...

Page 3: ...frigerant amount kg NG ISO 5149 At least one safety measure is required Construction guidance Children should be supervised to ensure that they do not play with the appliance Do not operate the unit with the panels and guards removed Rotating hot or high voltage parts may cause injury electric shock or fire Do not touch fans heat exchanger fins or the sharp edges of components with bare hands Doin...

Page 4: ...ed for the unit is slightly flammable and may result in fire in the presence of an ignition source If the air conditioner is installed in a small room take measures to prevent the refriger ant concentration from exceeding the safety limit in the event of refrigerant leakage Consult your dealer regarding the appropriate mea sures to prevent the allowable concentration from be ing exceeded If the re...

Page 5: ... If the refrigerant leaks when an ignition source is pres ent fire may result Wiring Work Include some slack in the power cables Failure to do so may break or overheat the cables re sulting in smoke or fire Connections must be made securely and without tension on the terminals Improperly connected cables may break overheat or cause smoke or fire Tighten all terminal screws to the specified torque ...

Page 6: ... on the power at least 12 hours before starting operation Keep the power turned on throughout the operating season Insufficient energizing will result in malfunction Do not use the air conditioner for special purposes e g keeping food animals plants precision devices or art objects in a room Such items could be damaged or deteriorated Collect the refrigerant and properly dispose of it in accordanc...

Page 7: ...doors and keep both ends of the pipes sealed until just before making a flare connection or brazing Store elbows and other joints in plastic bags If dust dirt or water enters the refrigerant lines the re frigerant oil will deteriorate and the compressor will malfunction Braze the pipes with a nitrogen purge to avoid oxidation Oxidized flux inside the refrigerant pipes will cause the refrigerant oi...

Page 8: ... 2 Outdoor Unit Refrigerant Circuit Diagrams 9 3 3 Functions of the Major Components of Outdoor Unit 13 3 4 Functions of the Major Components of Indoor Unit 17 3 5 External Appearance and Refrigerant Circuit Components of Hydro Unit 18 3 6 Hydro Unit Refrigerant Circuit Diagrams 20 3 7 Functions of the Major Components of Hydro Unit 21 Chapter 4 Electrical Components and Wiring Diagrams 4 1 Outdoo...

Page 9: ...Noise Interference 15 8 5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems 18 8 6 Troubleshooting Solenoid Valve Problems 22 8 7 Troubleshooting Outdoor Unit Fan Problems 24 8 8 Troubleshooting LEV FCV Problems 25 8 9 Troubleshooting Problems with Major Components on Hydro unit 34 8 10 Troubleshooting Inverter Problems 40 8 11 Control Circuit 59 8 12 Measures for ...

Page 10: ...iping Materials 4 1 2 3 Characteristics of the New and Conventional Refrigerants 5 1 2 4 Precautions for handling equipment using R32 6 1 2 5 Refrigerant Oil 13 1 3 Working with Refrigerant Piping 14 1 3 1 Pipe Brazing 14 1 3 2 Air Tightness Test 15 1 3 3 Vacuum Drying 16 1 3 4 Refrigerant Charging 18 1 4 Water piping 19 1 5 Precautions for Wiring 22 1 6 Cautionary notes on installation environmen...

Page 11: ...GB_BS_01_G 0000005109 BOOK 2 ページ２０１９年５月９日木曜日午前１０時１分 ...

Page 12: ...ollowing page s 1 1 2 Tool Preparation 5 Verification of the connecting pipes Verify the type of refrigerant used for the unit to be moved or replaced Use refrigerant pipes made of phosphorus deoxidized copper Keep the inner and outer surfaces of the pipes clean and free of such contaminants as sulfur oxides dust dirt shaving particles oil and water These types of contaminants inside the refrigera...

Page 13: ...conventional model Refrigerant Recovery Cylinder Refrigerant recovery Refrigerant Cylinder Refrigerant charging The refrigerant type is indicated The cylinder is light blue Charging Port on the Refrigerant Cylinder Refrigerant charging The charge port diameter is larger than that of the current port Tools Materials Use Notes Gas Leak Detector Gas leak detection The ones for use with HFC refrigeran...

Page 14: ... φ19 05 3 4 For a system that uses R410A or R32 use pipes that are made with 1 2H material Drawn Annealed pipes may be used for pipes with a di ameter of φ19 05 3 4 and a radial thickness of 1 2 t The figures in the radial thickness column are based on the Japanese standards and provided only as a reference Use pipes that meet the local standards 4 Thickness and refrigerant type indicated on the p...

Page 15: ...y infiltrate and contaminate the pipe 2 Sealing the pipe ends Both ends of the pipes should be sealed until just before brazing Keep elbow pipes and T joints in plastic bags The new refrigerator oil is 10 times as hygroscopic as the conventional refrigerating machine oil such as Suniso and if not handled with care could easily introduce moisture into the system Keep moisture out of the pipes for i...

Page 16: ...00 Type of Refrigerant Single Refrigerant Pseudo azeotropic Refrigerant Non azeotropic Refrigerant Single Refrigerant Chloride Not included Not included Not included Included Safety Class A2L A1 A1 A1 A1 A1 Molecular Weight 52 0 72 6 86 2 86 5 Boiling Point C F 51 7 61 0 51 4 60 5 43 6 46 4 40 8 41 4 Steam Pressure 25 C MPa 77 F psi gauge 1 588 230 1 557 226 0 9177 133 0 94 136 Saturated Steam Den...

Page 17: ...formed 3 General work area All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out Work in confined spaces shall be avoided The area around the workspace shall be sectioned off Ensure that the conditions within the area have been made safe by control of flammable material 4 Checking for presence of refrigerant The area shall be checked...

Page 18: ...discharged this shall be done in a safe manner to avoid possibility of sparking that no live electrical components and wiring are exposed while charging recovering or purging the system that there is continuity of earth bonding 5 Repairing sealed components 1 During repairs to sealed components all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal ...

Page 19: ... It is recommended good practice that all refrigerants are recovered safely Prior to the task being carried out an oil and re frigerant sample shall be taken in case analysis is required prior to re use of reclaimed refrigerant It is essential that electrical power is available before the task is commenced 2 Become familiar with the equipment and its operation 3 Isolate system electrically 4 Befor...

Page 20: ...ecovery units and especially not in cylinders 5 If compressors or compressor oils are to be removed ensure that they have been evacuated to an acceptable level to make certain that slightly flammable refrigerant does not remain within the lubricant The evacuation process shall be carried out prior to returning the compressor to the suppliers Only electric heating to the compressor body shall be em...

Page 21: ...tting into operation Decommissioning 1 If the safety is affected when the equipment is putted out of service the charged refrigerant shall be removed before decom missioning 2 Ensure sufficient ventilation at the equipment location 3 Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible 4 Discharge capacitors in a way that won t cause any s...

Page 22: ...ulates around the base it may reach a flammable concentration in case the room is small To avoid ignition maintain a safe work environment by ensuring appropriate ventilation If the refrigerant leaks in a room or an area that has insufficient ventilation refrain from using flames until the work environment is improved by ensuring appropriate ventilation Do not install the outdoor unit in a basemen...

Page 23: ...the installation conditions meet the requirements shown in the figure Take appropriate safety measures in accordance with the instructions provided in Figure 2 When installing a Hydro unit in a machine room or a riser minimum floor area requirements shown in Figure 2 system refrigerant amount minimum floor area 0 11 must be observed and the Hydro unit must be installed at a height of 1 8 meters or...

Page 24: ...le Refrigerant Refrigerating machine oil R22 Mineral oil R407C Ester oil R410A Ester oil R32 Ester oil 1 Contaminants is defined as moisture air processing oil dust dirt wrong types of refrigerant and refrigerating machine oil Cause Symptoms Effects on the refrigerant cycle Water infiltration Frozen expansion valve and capillary tubes Clogged expansion valve and capillary tubes Poor cooling perfor...

Page 25: ...flux when brazing between copper pipes or between a copper pipe and copper coupling If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends 2 Reasons The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if water infiltrates into the system Flux generally contains chloride Re...

Page 26: ...ment with nitrogen up to the design pressure 4 15MPa 601psi and then judge the equipment s air tight ness taking temperature variations into account 2 Reasons Oxygen if used for an air tightness test poses a risk of explosion Only use nitrogen to check air tightness 3 Notes Procure a leak detector that is specifically designed to detect an HFC leak A leak detector for R22 will not detect an HFC R3...

Page 27: ...h vacuum drying re moves moisture in the pipes Verify that the vacuum degree has not risen by more than 1Torr 130Pa 1hour after evacuation A rise by less than 1Torr 130Pa is acceptable If the vacuum is lost by more than 1Torr 130Pa conduct evacuation following the instructions in section 6 Special vacuum drying 5 Procedures for stopping vacuum pump To prevent the reverse flow of vacuum pump oil op...

Page 28: ...through the check joints at the refrigerant service valve on the high and low pressure sides BV1 and 2 and also through the check joints on the high and low pressure sides CJ1 and 2 To evacuate air only from the outdoor units Apply a vacuum through the check joints on the high and low pressure sides CJ1 and 2 To evacuate air from the hydro units and extension pipes Apply a vacuum through the check...

Page 29: ...the liquid state without the need for turning it upside down Check the type of the cylinder on the label before use If the refrigerant leaks out it may be replenished The entire refrigerant does not need to be replaced Charge refrigerant in the liquid state Refer to the following page s 8 12 Measures for Refrigerant Leakage Cylinder with a siphon Cylinder color R32 is light blue Refrigerant chargi...

Page 30: ...with a downward inclination of between 1 100 and 1 200 To prevent drain water from freezing in winter install the drain pipe as steep an angle as practically possible and minimize the straight line For cold climate installation take an appropriate measure e g drain heater to prevent the drain water from freezing 5 Insulation Cover the water pipe with insulating materials with the specified thickne...

Page 31: ... air vent operation pH 25 C 77 F Electric conductivity Chloride ion Sulfate ion Acid consumption pH4 8 Total hardness Calcium hardness Ionic silica Iron Copper Sulfide ion Ammonium ion Residual chlorine Free carbon dioxide Ryzner stability index Standard items Reference items Items Lower mid range temperature water system 7 0 8 0 30 or less 300 or less 50 or less 50 or less 50 or less 70 or less 5...

Page 32: ... antifreeze liquid concentration required for freeze protection 2 Capacity correction by antifreeze liquid concentration cooling 3 Capacity correction by antifreeze liquid concentration heating 0 10 20 30 40 50 60 70 Freezing Temperature C 0 5 10 15 20 25 30 Antifreeze liquid concentration wt 0 10 20 30 40 50 Ratio of cooling capacity 1 0 99 0 98 0 97 0 96 0 95 0 94 0 93 0 92 0 91 0 9 Antifreeze l...

Page 33: ...age has dropped below 20 VDC When a system controller is connected to the centralized control transmission cable to which power is supplied from the out door unit power jumper on the outdoor unit is connected to CN40 be aware that power can be supplied to the centralized control transmission and the system controller may detect an error and send an error notice if the outdoor unit fan is rotated b...

Page 34: ...w mark a line through the screw head washer and terminals with a permanent marker Example Poor contact caused by loose screws may result in overheating and fire Continued use of the damaged circuit board may cause overheating and fire Daisy chain Power supply terminal block indoor outdoor transmission line terminal block and centralized controller transmission line Mark a line Place the round term...

Page 35: ...ure to salt water mist 2 Avoid installing a sun shade over the outdoor unit so that rain will wash away salt deposits off the unit 3 Install the unit horizontally to ensure proper water drainage from the base of the unit Accumulation of water in the base of the outdoor unit will significantly accelerate corrosion 4 Periodically wash salt deposits off the unit especially when the unit is installed ...

Page 36: ...1 2 7 2 Single Refrigerant System with Two or More LOSSNAY Units 13 2 7 3 Grouped Operation of Units in Separate Refrigerant Circuits 15 2 7 4 System with a Connection of System Controller to Centralized Control Transmission Line 17 2 7 5 System with a Connection of System Controller to Indoor Outdoor Transmission Line 19 2 8 Example System with an ME Remote Controller 21 2 8 1 System with a Conne...

Page 37: ...GB_BS_02_E 0000004972 BOOK 2 ページ２０１９年５月８日水曜日午後２時４８分 ...

Page 38: ...city of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit the indoor units will not be able to perform at the rated capacity when they are operated simultaneously Select a combination of units so that the total capacity of the connected indoor units is at or below the capacity of the outdoor unit whenever possible 3 WP model units cannot be connec...

Page 39: ...egorized into 2 types transmission line and remote controller line Use the appropriate type of cables and observe the maximum allowable length specified for a given system If a given system has a long transmission line or if a noise source is located near the unit place the unit away from the noise source to reduce noise interference 1 M NET transmission line Cable type Facility type All facility ...

Page 40: ...nit is being powered those changes will not take effect and the unit will not function properly 1 Applicable when LOSSNAY units are connected to the indoor outdoor transmission line 2 When setting the switch SW4 of the control board set it with the outdoor unit power on Refer to the following page s 5 1 1 Outdoor Unit Switch Functions and Factory Settings MA remote controller 1 ME remote controlle...

Page 41: ...r assigning an address to all indoor units 00 ME remote con troller Main remote controller 101 to 150 Add 100 to the smallest address of all the indoor units in the same group 101 Sub remote controller 151 to 200 2 Add 150 to the smallest address of all the indoor units in the same group MA remote controller No address settings required The main sub setting must be made if 2 remote controllers are...

Page 42: ...er install the remote controller where room temperature can be detected Note Factory setting for SW1 1 on the indoor unit of the All Fresh Models is ON 2 When an optional temperature sensor is used set SW1 1 to OFF and set SW3 8 to ON When using an optional temperature sensor install it where room temperature can be detected System configu ration Connection to the system con troller Power supply u...

Page 43: ...de 5 To control the external input to and output from the air conditioners with the PLC software for general equipment via the AE 200 set SW1 9 and SW1 10 to ON With these settings made the power start stop function becomes disabled To use the auto recovery function after power failure while these settings are made set SW1 5 to ON Function Operation of the indoor unit when the operation is resumed...

Page 44: ...mple of wiring connection CAUTION 1 Wiring should be covered by insulation tube with supplementary insulation 2 Use relays or switches with IEC or equivalent standard 3 The electric strength between accessible parts and control circuit should have 2750V or more Type Usage Function Terminal to be used 1 Option Input Prohibiting cooling heating operation thermo OFF by an external input to the outdoo...

Page 45: ...l part PAC SC36NA E or field supply X Low noise mode X Low noise mode Y Compressor ON OFF X Y Relay Contact rating voltage DC15V Contact rating current 0 1A Minimum applicable load 1mA at DC Y X CN3D Preparations in the field Maximum cable length is 10m External input adapter 2 Outdoor unit control board 3 2 1 Relay circuit 2 Optional part PAC SC36NA E or field supply X CN3D Preparations in the fi...

Page 46: ... ON on the outdoor units the following operations cannot be performed Performing 4 step demand in combination with the low noise operation in a single outdoor unit system 2 Contact input and control content 1 SW6 8 OFF Compressor ON OFF Low noise mode 1 When SW6 8 on the outdoor unit in one refrigerant circuit system is set to ON this function cannot be used 2 When SW6 8 on one outdoor unit in one...

Page 47: ...f multiple LOSS NAY units 3 Grouping of units in different refrigerant systems NO Manual address setup 4 System with single refrigerant system With connection to transmission line for centralized control Manual address setup 5 System with single refrigerant system With connection to indoor outdoor transmission line Manual address setup System configuration Connection to the system controller Addre...

Page 48: ...More LOSSNAY Units 5 For information about connecting two or more LOSSNAY units to a system refer to the following page s 2 7 2 Single Refrigerant System with Two or More LOSSNAY Units 3 Maximum allowable length 1 Indoor outdoor transmission line Maximum distance 1 25mm2 AWG16 or larger L1 L2 L3 L4 200m 656ft L1 L2 L11 L12 L13 200m 656ft 2 Transmission line for centralized control No connection is...

Page 49: ...erforming a group operation of indoor units that have different functions Automatic indoor outdoor ad dress setup is not available 4 LOSSNAY connection Connect terminals M1 and M2 on the terminal block TB5 on the indoor unit IC to the appropriate terminals on the terminal block TB5 on LOSSNAY LC Non po larized two wire Interlock operation setting with all the indoor units in the same system will a...

Page 50: ... is connected are con nected Refer to the DATABOOK for further information about how many booster units are required for a given system 3 Maximum allowable length 1 Indoor outdoor transmission line Same as 2 7 1 2 Transmission line for centralized control No connection is required 3 MA remote controller wiring Same as 2 7 1 L2 TB3 51 52 TB3 TB7 S S IC TB5 S TB15 1 2 01 IC TB5 S TB15 1 2 02 A B MA ...

Page 51: ...the group To perform a group opera tion of indoor units that have different functions designate the indoor unit in the group with the great est number of functions as the main unit 00 Sub unit Assign sequential numbers starting with the address of the main unit in the same group 1 Main unit ad dress 1 main unit ad dress 2 main unit address 3 etc 2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique...

Page 52: ...r transmission line Maximum distance 1 25mm2 AWG16 or larger L11 L12 200m 656ft L21 L22 200m 656ft 2 Transmission line for centralized control L21 L31 200m 656ft 3 MA remote controller wiring Same as 2 7 1 4 Maximum line distance via outdoor unit 1 25mm2 AWG16 or larger L12 L11 L31 L22 L21 1000 m 3280ft 500 m 1640ft 1 1 If a given system includes one or more unit or remote controller that does not...

Page 53: ...ng 1 Indoor unit Main unit IC 01 to 50 Assign the smallest ad dress to the main unit in the group To perform a group operation of indoor units that have differ ent functions desig nate the indoor unit in the group with the greatest number of functions as the main unit 00 Sub unit Assign sequential num bers starting with the ad dress of the main unit in the same group 1 Main unit address 1 main uni...

Page 54: ...onnected to the transmission line for centralized control leave the power jumper connector on CN41 as it is factory setting 3 Maximum allowable length 1 Indoor outdoor transmission line Same as 2 7 3 2 Transmission line for centralized control L31 L32 L21 200m 656ft 3 MA remote controller wiring Same as 2 7 1 4 Maximum line distance via outdoor unit 1 25mm2 AWG16 or larger L32 L31 L12 L11 1000 m 3...

Page 55: ...l for the system controller for the setting method In terlock setting from the remote controller is required if the ON OFF remote controller alone or the LM adapter alone is connected 5 Switch setting Address setting is required as follows 5 Address setting method Proce dures Unit or controller Address setting range Setting method Notes Factory setting 1 Indoor unit Main unit IC 01 to 50 Assign th...

Page 56: ...ion line Refer to the DATABOOK for further information about how many booster units are required for a given system 3 Maximum allowable length 1 Indoor outdoor transmission line Maximum distance 1 25mm2 AWG16 or larger L11 L12 200m 656ft L21 L22 200m 656ft L25 200m 656ft 2 Transmission line for centralized control L31 L21 200m 656ft 3 MA remote controller wiring Same as 2 7 1 4 Maximum line distan...

Page 57: ...e TB5 on LOSSNAY LC Non polarized two wire Indoor units must be interlocked with the LOSSNAY unit using the system controller Refer to the operation man ual for the system controller for the setting method In terlock setting from the remote controller is required if the ON OFF remote controller alone is connected 5 Switch setting Address setting is required as follows 5 Address setting method Proc...

Page 58: ...tralized control leave the power jumper connector on CN41 as it is factory setting 3 Maximum allowable length 1 Indoor outdoor transmission line Same as 2 7 3 2 Transmission line for centralized control Same as 2 7 4 3 M NET remote controller wiring Maximum overall line length 0 3 to 1 25mm2 AWG22 to 16 m1 10m 32ft m2 m3 10m 32ft If the standard supplied cable must be extended use a cable with a d...

Page 59: ... the greatest number of functions as the main unit 00 Sub unit Assign sequential num bers starting with the ad dress of the main unit in the same group 1 Main unit address 1 main unit address 2 main unit address 3 etc 2 LOSSNAY LC 01 to 50 Assign an arbitrary but unique address to each of these units after as signing an address to all indoor units None of these ad dresses may overlap any of the in...

Page 60: ...t be connected to a system in which the total number of connected indoor units ex ceeds 20 10 A transmission booster is required in a system to which more than 16 indoor including one or more indoor units of the 200 model or above are connected Refer to the DATABOOK for further information about how many booster units are required for a given system 11 When a power supply unit is connected to the ...

Page 61: ...emote controller MA Sub remote controller Settings to be made accord ing to the remote controller function selection 2 Opera tion with the ME re mote control ler Indoor unit Main unit IC 01 to 50 Assign the smallest address to the main unit in the group Enter the indoor unit group settings on the system con troller MELANS Assign an address larger than those of the indoor units that are connected t...

Page 62: ...r unit and hydro unit outdoor unit above hydro unit H1 50 1 1 The maximum length is 90 m depending on the unit model and installation conditions For more detailed information contact your local distributor Height between outdoor unit and hydro unit outdoor unit below hydro unit H1 40 2 2 The maximum length is 60 m depending on the unit model and installation conditions For more detailed informatio...

Page 63: ...unit pipe size Outdoor unit set name total capacity Liquid pipe size mm inch Gas pipe size mm inch 200 model ø9 52 3 8 ø22 2 7 8 250 model ø9 52 3 8 ø22 2 7 8 300 model ø9 52 3 8 ø22 2 7 8 1 1 Use ø28 58 1 1 8 pipes for EM300 models 350 model ø12 7 1 2 ø28 58 1 1 8 400 model ø12 7 1 2 ø28 58 1 1 8 450 model ø15 88 5 8 ø28 58 1 1 8 500 model ø15 88 5 8 ø28 58 1 1 8 0000004972 BOOK 26 ページ２０１９年５月８日 ...

Page 64: ...t side PUHY EM200 CMH WM250V A PUHY M250 1 PUHY EM250 1 2 2 PUHY M300 3 CMH WM350V A PUHY EM300 3 CMH WM350V A 4 4 PUHY M350 PUHY EM350 PUHY M400 5 CMH WM500V A PUHY EM400 5 CMH WM500V A PUHY M450 PUHY EM450 PUHY M500 PUHY EM500 Standard models High efficient models Unit model Liquid Gas Unit model Liquid Gas Outdoor unit side PUHY M200 ø9 52 ø3 8 ø22 2 ø7 8 Outdoor unit side PUHY EM200 ø9 52 ø3 8...

Page 65: ... for details 2 10 4 Hydro Unit Connection Method 1 Size of the pipe that fits the standard Hydro unit ports Hydro unit Model name Inlet pipe size Outlet pipe size Hydro unit side CMH WM250V A 40A housing joint 40A housing joint CMH WM350V A 40A housing joint 40A housing joint CMH WM500V A 50A housing joint 50A housing joint Indoor unit Connection size Pipe size Water inlet Water outlet Water retur...

Page 66: ...or Unit Refrigerant Circuits 4 3 2 Outdoor Unit Refrigerant Circuit Diagrams 9 3 3 Functions of the Major Components of Outdoor Unit 13 3 4 Functions of the Major Components of Indoor Unit 17 3 5 External Appearance and Refrigerant Circuit Components of Hydro Unit 18 3 6 Hydro Unit Refrigerant Circuit Diagrams 20 3 7 Functions of the Major Components of Hydro Unit 21 0000004974 BOOK 1 ページ２０１９年５月９...

Page 67: ...GB_BS_03_E 0000004974 BOOK 2 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 68: ...1 1 External Appearance of Outdoor Unit 1 PUHY M200 M250 M300YNW A1 PUHY EM200 EM250 EM300YNW A1 Fan guard Fan guard Fan Fan Fin guard Fin guard Control box INV BOX Control box INV BOX Control box MAIN BOX Control box MAIN BOX Drain pan Drain pan Front panel Front panel Heat exchanger Heat exchanger Front panel Front panel Rear panel Rear panel Side panel Side panel Internal panel Internal panel I...

Page 69: ...50YNW A1 PUHY EM350 EM400 EM450YNW A1 Fan guard Fan guard Fan Fan Fin guard Fin guard Control box Control box Drain pan Drain pan Front panel Front panel Heat exchanger Heat exchanger Internal panel Internal panel Front panel Front panel Rear panel Rear panel Side panel Side panel Internal panel Internal panel Side panel Side panel 0000004974 BOOK 2 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 70: ...UHY EM500YNW A1 Fan guard Fan guard Fan Fan Fin guard Fin guard Control box Control box Drain pan Drain pan Front panel Front panel Heat exchanger Heat exchanger Internal panel Internal panel Front panel Front panel Rear panel Rear panel Side panel Side panel Internal panel Internal panel Side panel Side panel Side panel Side panel 0000004974 BOOK 3 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 71: ...LEV1 Gas liquid separator Subcool coil Solenoid valve SV1a Linear expansion valve LEV9 Linear expansion valve LEV2a Linear expansion valve LEV2b Solenoid valve SV10 Solenoid valve SV9 Solenoid valve SV2 Liquid side valve BV2 Gas side valve BV1 Oil separator Compressor Compressor cover Low pressure sensor 63LS High pressure sensor 63HS1 High pressure switch 63H1 Accumulator Low pressure check joint...

Page 72: ...eparator Solenoid valve SV1a Linear expansion valve LEV9 Linear expansion valve LEV2a Linear expansion valve LEV2b Solenoid valve SV15 Solenoid valve SV14 Solenoid valve SV10 Solenoid valve SV9 Linear expansion valve LEV4 Solenoid valve SV2 Liquid side valve BV2 Gas side valve BV1 Oil separator Compressor Compressor cover Low pressure sensor 63LS High pressure sensor 63HS1 High pressure switch 63H...

Page 73: ...rator Subcool coil Linear expansion valve LEV9 Linear expansion valve LEV2a Linear expansion valve LEV2b Solenoid valve SV10 Solenoid valve SV9 Solenoid valve SV2 Solenoid valve SV1a Liquid side valve BV2 Gas side valve BV1 Oil separator Compressor Compressor cover Low pressure sensor 63LS High pressure sensor 63HS1 High pressure switch 63H1 Accumulator Low pressure check joint CJ2 High pressure c...

Page 74: ...expansion valve LEV9 Linear expansion valve LEV2a Linear expansion valve LEV2b Solenoid valve SV10 Solenoid valve SV9 Solenoid valve SV2 Linear expansion valve LEV4 Solenoid valve SV1a Liquid side valve BV2 Gas side valve BV1 Oil separator Compressor Compressor cover Low pressure sensor 63LS High pressure sensor 63HS1 High pressure switch 63H1 Accumulator Low pressure check joint CJ2 High pressure...

Page 75: ...Gas liquid separator Linear expansion valve LEV9 Linear expansion valve LEV2a Linear expansion valve LEV2c Linear expansion valve LEV2b Solenoid valve SV9 Solenoid valve SV10 Solenoid valve SV11 Liquid side valve BV2 Gas side valve BV1 Oil separator Compressor Compressor cover Low pressure sensor 63LS High pressure sensor 63HS1 High pressure switch 63H1 Accumulator Low pressure check joint CJ2 Hig...

Page 76: ...r Unit Refrigerant Circuit Diagrams 1 PUHY M200 M450YNW A1 SCC LEV1 LEV4 LEV9 ACC 63H1 21S4a ST6 63HS1 63LS ST7 CJ1 CJ2 Comp O S LEV2a LEV2b ST2 BV2 BV1 21S4b SV9 SV10 SV2 ST18 Hex for INV cooling ST1 FAN 2fans for P350 400 450 Motor SV1a CP1 CV1 HEX TH7 TH5 TH2 TH3 TH6 TH4 TH15 ST3 Rear Front 0000004974 BOOK 9 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 77: ...UHY M500YNW A1 SCC LEV1 LEV9 ACC 63H1 21S4a ST6 63HS 63LS ST7 CJ1 CJ2 Comp O S LEV2a LEV2b LEV2c ST2 BV2 BV1 21S4b 21S4c SV9 SV 11 SV 10 SV2 ST18 Hex for INV cooling ST1 FAN2 FAN1 Motor Motor SV1a CP1 CV1 CV2 HEX3 HEX2 HEX1 TH5 TH2 TH3 TH6 TH4 TH15 ST3 TH7 Left rear Right rear Front LEV4 0000004974 BOOK 10 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 78: ...0 SV2 ST18 Hex for INV cooling Original direction Original direction ST1 FAN 2fans for EP350 400 450 Motor SV1a CP1 CV1 HEX TH7 TH5 TH2 TH3 TH6 TH15 ST3 Rear Front Notes on SV14 and 15 Special pressure difference driven two way valve Normal flow direction When energized Valve body opens When not energized Valve body closes Reverse flow direction When energized Valve body closes When not energized ...

Page 79: ...HY EM500YNW A1 SCC LEV1 LEV9 ACC 63H1 21S4a ST6 63HS 63LS ST7 CJ1 CJ2 Comp O S LEV2a LEV2b LEV2c ST2 BV2 BV1 21S4b 21S4c SV9 SV 11 SV 10 SV2 ST18 Hex for INV cooling ST1 FAN2 FAN1 Motor Motor SV1a CP1 CV1 CV2 HEX3 HEX2 HEX1 TH5 TH2 TH3 TH15 ST3 TH7 Left rear Right rear Front TH4 TH6 LEV4 0000004974 BOOK 12 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 80: ... Ω High pres sure sensor 63HS1 1 Detects high pressure 2 Regulates frequency and pro vides high pressure protec tion Low pres sure sensor 63LS 1 Detects low pressure 2 Provides low pressure pro tection 3 Defrost control during heating operation Pres sure switch 63H1 1 Detects high pressure 2 Provides high pressure pro tection 4 15MPa 601psi OFF setting Pressure 0 4 15 MPa 601psi Vout 0 5 3 5V 0 07...

Page 81: ... obtained based on the HPS data and TH3 val ue TH7 Outdoor temperature 1 Detects outdoor air tempera ture 2 Controls fan operation TH5 Pipe temperature LEV2 are controlled based on the 63LS and TH5 values TH6 Pipe temperature Controls LEV1 based on TH2 TH3 and TH6 data TH15 Compres sor shell bot tom temperature Detects compressor shell bottom temperature THHS Inverter heat sink temperature Inverte...

Page 82: ...ling DC12V Opening of a valve driven by a stepping motor 0 480 pulses Refer to the follow ing page s 8 8 Troubleshooting LEV FCV Prob lems LEV9 Refrigerant flow adjust ment Adjusts the flow of refrigerant by passed from the pipe for cooling the control board when the control board temperature rises LEV4 Injection amount control DC12V Opening of stepping motor driving valve 0 480 pulses direct driv...

Page 83: ... E M350 E M500 models Regulates the heat exchanger ca pacity by adjusting the operating frequency and operating the pro peller fan based on the operating pressure AC380 400V 920W The E M200 300 500 mod els and E M350 450 models are equipped with different types of fan motors Part name Symbols functions Notes Usage Specifications Check method 0000004974 BOOK 16 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 84: ...or air temperature Indoor unit control Thermo Pressure sensor inner wa ter PS1 1 Detects inner water pres sure 2 Check flow rate Pressure sensor outlet water PS2 1 Detects outlet water pres sure 2 Check flow rate 1 273 t R0 15k R0 80 3460 Rt 15exp 3460 1 273 Pressure 0 1 0 MPa 145psi Vout 0 5 4 5V 0 392V 0 098 MPa 14psi Pressure MPa 0 25 x Vout V 0 125 Pressure psi 0 25 x Vout V 0 125 x 145 GND Bl...

Page 85: ... 3 Major Components Their Functions and Refrigerant Circuits 3 5 External Appearance and Refrigerant Circuit Components of Hydro Unit 1 Front 2 Rear Refrigerant pipe Gas Refrigerant pipe Liquid Water inlet Exp vessel To indoor units From indoor units 0000004974 BOOK 18 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 86: ...t Circuit Components of Hydro Unit BS_03_E chapter 3 19 3 Major Components Their Functions and Refrigerant Circuits 3 Rear right side PWS PRV Prf Heat exchanger Water pump Control box LEV1 SV1 PWD 0000004974 BOOK 19 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 87: ...efrigerant system TH13 TH32 Prf TH11 TH35 Solenoid valve SV1 Check valve CV1 Water Refrigerant Refrigerant Manual rereif valve MRV Water pressure protection valve PRV Water pump WP1 Water PS Heat exchanger Heat exchanger Strainer LEV1 Hydro unit water system S Strainer S Strainer accessory Expansion vessel Main piping S PS PWD PS PWS M M 0000004974 BOOK 20 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 88: ...k TH32 35 Water side Water pump discharge suction water temperature Pressure sensor Prf Refriger ant side 1 Detects refrigerant pressure 2 LEV control PWD Water side 1 Detects water discharge pres sure 2 Water control PWS Water side 1 Detects water suction pres sure 2 Water control Pump WP1 Water side Temperature difference control Controls the water flow to each indoor unit 200V 3 phase Frequency...

Page 89: ... 3 7 Functions of the Major Components of Hydro Unit 22 chapter 3 BS_03_E 3 Major Components Their Functions and Refrigerant Circuits 0000004974 BOOK 22 ページ２０１９年５月９日木曜日午後６時１１分 ...

Page 90: ...ard 12 4 2 5 Noise Filter 13 4 2 6 Filter Board 15 4 2 7 Capacitor Board CAP Board 16 4 3 Outdoor Unit Electrical Wiring Diagrams 17 4 4 Transmission Booster Electrical Wiring Diagrams 20 4 5 Hydro Unit Circuit Board Arrangement 21 4 5 1 Hydro Unit Control Box 21 4 6 Hydro Unit Circuit Board Components 22 4 6 1 Control Board 22 4 6 2 Power supply board PS Board 23 4 6 3 Inverter Board INV Board 24...

Page 91: ...GB_BS_04_E 0000004976 BOOK 2 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 92: ...r servicing reconnect the relay connector RYFAN1 in the INV box as it was 7 When opening or closing the front panel of the control box do not touch any of the internal components Before inspecting inside the control box turn off the power to the unit leave it turned off for at least 10 minutes and check that the voltage across Pin 1 and Pin 5 of connector RYPN in the INV box is 20 VDC or less It t...

Page 93: ...omponents and Wiring Diagrams MAIN BOX 1 Leave the grounding connected during maintenance Control board PS board Note 1 Note 1 Note 1 Transmission cable terminal block TB3 TB7 Connector RYPS1 white 3pin RYPS2 white 5pin RY63H white 2pin 0000004976 BOOK 2 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 94: ...nrush current resistor has a locking function Check that the terminal is securely locked in place Press the tab in the middle of the terminal to remove it 3 Leave the grounding connected during maintenance RYFAN1 In rush current resistor R1 R5 Note 2 Noise filter Power supply terminal block PYPN 1 pin 5 pin Fan board INV board The figure at left shows the unit seen from the left after the front pa...

Page 95: ...After servicing reconnect the relay connector RYFAN1 and RYFAN2 in the INV box as it was 8 When opening or closing the front panel of the control box do not touch any of the internal components Before inspecting inside the control box turn off the power to the unit leave it turned off for at least 10 minutes and check that the voltage across Pin 1 and Pin 5 of connector RYPN in the INV box is 20 V...

Page 96: ...r below 7 After servicing reconnect the relay connector RYFAN1 and RYFAN2 in the INV box as it was 8 When opening or closing the front panel of the control box do not touch any of the internal components Before inspecting inside the control box turn off the power to the unit leave it turned off for at least 10 minutes and check that the voltage across Pin 1 and Pin 5 of connector RYPN in the INV b...

Page 97: ...pply ON TP1 Indoor outdoor transmission check pin TP2 Indoor outdoor transmission check pin Sensor input F001 AC250V 3 15A T CNUSB USB memory connector Actuator drive output SW4 6 Dip switch CN991 Battery box CNRYA 72C drive signal Abbreviated name of connector color Example BU above CN601 indicates that the connector is blue CN600 9 VDC input GND 12 VDC input GND CN603 Cooling fan control signal ...

Page 98: ...2 Indoor outdoor transmission signal input output Centralized control system power supply output CNINT GND 5 VDC input Indoor unit system power supply ON OFF signal input CN101 Cooling fan ON OFF signal input Inverter reset signal input Locked cooling fan sensor output Locked cooling fan sensor output CN304 63H error detection output 3 3 VDC output GND CNINV COMPINV power supply output 17 VDC outp...

Page 99: ...oor transmission signal input output Centralized control system power supply output CNINT GND 5 VDC input Indoor unit system power supply ON OFF signal input CN101 Cooling fan ON OFF signal input Inverter reset signal input Locked cooling fan sensor output Locked cooling fan sensor output CNFAN1 FAN1INV power supply output 17 VDC output N CNFAN2 FAN2INV power supply output 17 VDC output N CNINV CO...

Page 100: ...nd cause an electric shock when the outdoor unit fan rotates in windy conditions Refer to the wiring nameplate for details 5 After servicing reconnect the relay connector RYFAN1 of the fan as it was 6 When the power is turned on the compressor is energized even while it is not operating Before turning on the power discon nect all power supply wires from the compressor terminal block and measure th...

Page 101: ...ollect a charge and cause an electric shock when the outdoor unit fan rotates in windy conditions Refer to the wiring nameplate for details 5 After servicing reconnect the relay connector RYFAN1 RYFAN2 of the fan as it was 6 When the power is on the compressor or heater is energized even while the compressor is stopped Before turning on the power disconnect all power supply wires from the compress...

Page 102: ...the relay connector RYFAN1 RYFAN2 of the fan as it was 6 When the power is turned on the compressor is energized even while it is not operating Before turning on the power discon nect all power supply wires from the compressor terminal block and measure the insulation resistance of the compressor Check the compressor for a ground fault If the insulation resistance is 1 0 MΩ or above connect all po...

Page 103: ...or unit fan is not rotating and that the voltage across pins 1 and 5 of connector RYPN is 20 VDC or less The capacitor may collect a charge and cause an electric shock when the outdoor unit fan rotates in windy conditions Refer to the wiring nameplate for details 4 To connect wiring to TB7 check that the voltage is 20 VDC or below 5 After servicing reconnect the relay connector RYFAN1 RYFAN2 of th...

Page 104: ... Input N TB13 Input L3 TB12 Input L2 TB11 Input L1 Ground TB22 Output L2 TB23 Output L3 TB21 Output L1 CN5 Output L1 N CN1 Output L2 N Ground Ground Ground F1 F2 F3 F4 Fuse 250 VAC 6 3 A CN2 Surge absorber circuit Surge absorber circuit Open phase detection circuit Open phase detection circuit CN3 Open phase detection circuit Open phase detection circuit 0000004976 BOOK 13 ページ２０１９年５月８日水曜日午後２時５７...

Page 105: ...ut N TB13 Input L3 TB33 L3 TB12 Input L2 TB11 Input L1 Ground CN5 Output L1 N CN1 Output L2 N Ground Ground Ground F1 F2 F3 F4 Fuse 250 VAC 6 3 A CN2 Surge absorber circuit Surge absorber circuit Open phase detection circuit Open phase detection circuit CN3 Open phase detection circuit Open phase detection circuit 0000004976 BOOK 14 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 106: ...door Unit Circuit Board Components BS_04_E chapter 4 15 4 Electrical Components and Wiring Diagrams 4 2 6 Filter Board 1 PUHY E M500YNW A1 CN1A L1 N CN1B Input L3 L2 0000004976 BOOK 15 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 107: ...or has a locking function Make sure the cable heads are securely locked in place Press the tab on the terminals to remove them 3 Control box houses high temperature parts Be well careful even after turning off the power source 4 Perform the service after disconnecting the relay connector RYFAN1 RYFAN2 Before plugging in or unplugging connectors check that the outdoor unit fan is not rotating and t...

Page 108: ...ut Error detection output DC12V CN51 1 s digit 10 s digit 3 SWU1 SWP3 LED301 Display setting Function setting CN4A black 2 3 1 4 CN4 black 2 3 1 4 CNPS red 21 4 CN604 green 21 CN600 45 2 1 PS Board 1 3 CNINV yellow 2 1 CNFAN1 yellow 1 2 CNDC 4 5 1 CN101 4 blue CN304 2 1 blue CN303 2 1 4 3 2 1 CN202 CN100 red 1 3 DB2 IPM power supply circuit M NET power supply circuit CPU power supply circuit 3 2 C...

Page 109: ...202 M NET power supply circuit CPU power supply circuit DB1 1 2 CNINT 4 red CNDC CN101 blue Control Board 3 1 2 1 2 3 3 1 2 1 2 3 CN202 CN201 red 63LS 63HS1 1 2 CNPOW yellow 1 3 CN3K yellow 1 3 CN3S red 3 1 3 CN3D 1 3 CN3N blue 4 1 CN41 2 3 4 1 CN40 2 3 TP1 TP2 TB3 TB7 M1 M2 M1 M2 S Indoor Outdoor transmission cable Central control transmission cable 4 CNAC 3 1 2 2 2 ON OFF X10 X07 X09 5 5 1 1 CN5...

Page 110: ...U2 LED301 Compressor ON OFF output Error detection output DC12V CN51 1 s digit 10 s digit 3 SWU1 SWP3 LED301 Display setting Function setting CN4A black 2 3 1 4 CN4 black 2 3 1 4 CNPS red 21 4 CN604 green 21 CN603 blue 2 1 3 CN600 45 2 1 PS Board 1 3 CNINV yellow 1 2 CNFAN1 yellow 1 2 CNDC 4 5 1 2 CN101 4 blue CN304 2 1 blue 4 3 2 1 CN202 CNFG5 blue 1 2 CN100 red 3 DB2 IPM power supply circuit M N...

Page 111: ...e White White White White Blue Red Red DSA White White Blue Red Red Red Red Varistor Varistor Noise filter Stabilized power supply 4 3 2 1 1 2 3 CN2 CN1 Black Black Black Black Green Yellow 1 2 3 E 4 Choke coil 1 2 CN3 1 2 1 2 CN4 CN2 1 2 CN1 Electronic control board Black White Red Red Black S B A S B A Terminal block 2 for transmission line TB3 Expanded indoor unit side Terminal block 1 for tran...

Page 112: ...ams 4 5 Hydro Unit Circuit Board Arrangement 4 5 1 Hydro Unit Control Box 1 CMH WM250 350 500V A Control board Transmission cable terminal block TB3 Inverter board Power supply board Terminal block for power supply RYPN 1pin 5pin AC reactor ACL RYPN 1pin 5pin 0000004976 BOOK 21 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 113: ...ents and Wiring Diagrams 4 6 Hydro Unit Circuit Board Components 4 6 1 Control Board SW 001 002 011 Dip switch TB3 Indoor Outdoor transmission terminal block SWP 01 03 Push switch CN991 Battery Box LD 001 Maintenance LED SWU 01 02 Address 0000004976 BOOK 22 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 114: ...rams 4 6 2 Power supply board PS Board CNFG 1 Ground F111 250VAC 15A T F110 250VAC 6 3A T LED 01 Lit Microcomputer is energized Unlit Microcomputer is not energized LED 02 Lit Converter operation Blinking Converter error F401 3 15A T FT 001 002 ACL terminal 0000004976 BOOK 23 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 115: ...y locked in place Press the tab on the terminals to remove them 3 Control box houses high temperature parts Be well careful even after turning off the power source 4 When the power is turned on the water pump is energized even while it is not operating Before turning on the power discon nect all power supply wires from the water pump connector and measure the insulation resistance of the water pum...

Page 116: ... operation LED1 Normal operation lit Error blink power supply 220V 240V 50Hz 60Hz LED02 Normal operation lit Error blink LED01 CPU in operation PSR LD601 power supply Primary current detection circuit 3 1 5 4 2 TB N TB P RYPN 1 2 Z1 yellow CN403 F 6 3A F15A red ENTER black white red Note 1 The broken lines indicate the field supplied parts and field work 2 TB3 is transmission terminal block Never ...

Page 117: ... 4 7 Hydro Unit Electrical Wiring Diagrams 26 chapter 4 BS_04_E 4 Electrical Components and Wiring Diagrams 0000004976 BOOK 26 ページ２０１９年５月８日水曜日午後２時５７分 ...

Page 118: ... 5 2 9 Outdoor Unit Fan Control 19 5 2 10 Subcool Coil Control Linear Expansion Valve LEV1 19 5 2 11 Refrigerant Flow Control Linear Expansion Valves LEV2a LEV2b and LEV2c 19 5 2 12 Control of Controller Cooling Function Electronic Expansion Valve LEV9 19 5 2 13 Injection Control Linear Expansion Valve LEV4 20 5 2 14 Control at Initial Startup 20 5 2 15 Operation Mode 20 5 2 16 Demand Control 21 5...

Page 119: ...GB_BS_05_E 0000004980 BOOK 2 ページ２０１９年５月９日木曜日午後６時１８分 ...

Page 120: ...rity setting at low outside temperature Heating COP priority mode Heating capacity priori ty control mode Before power on 3 4 Model setting outdoor unit high static pressure setting Function depends on the setting combination with the SW6 5 setting Note 5 Factory setting OFF Before power on 5 Model setting outdoor unit high static pressure setting Function depends on the setting combination with t...

Page 121: ...r 30 seconds and comes to an error stop See the relevant pages for details 8 10 10 Checking the Fan Board for Damage with Load No load operation dis abled No load operation en abled Any time after power on 3 4 Enables or disables no load operation of the right fan in verter The unit continues no load op eration for 30 seconds and comes to an error stop See the relevant pages for details 8 10 10 Ch...

Page 122: ...n noise is reduced by controlling the compressor frequencies and the rotation speed of the outdoor unit fans CN3D needs to be set Refer to the following page s 2 4 7 Various Control Methods Using the Signal Input Output Connec tor on Outdoor Unit 4 Operation noise is reduced by limiting the frequency of the compressor and rotation speed of the outdoor unit fan 5 External static pressure setting de...

Page 123: ...t starts Anytime after power on 10 minutes after the completion of defrost oper ation OFF ON or 10 minutes after compres sor start up OFF ON No 915 1100100111 Defrost start temperature Note 2 E P200 300 13 C 9 F E P350 500 11 C 12 F 8 C 18 F Anytime after power on No 916 0010100111 Defrost end temperature Note 2 E P200 300 10 C 50 F E P350 500 7 C 45 F 5 C 41 F Anytime after power on No 918 011010...

Page 124: ...ctured in December of 2012 and later Depending on the model this function may be added on later date Ask your dealer for further details 7 The multiple stage low noise function controls the fan by targeting the capacities shown in the table below 8 Shaded areas indicate factory settings 3 Fan board Only the addresses are preset before shipment All other switches are set to OFF Unless otherwise spe...

Page 125: ...nd setting 2 Setting i See sensor installation position Heating 4 C 7 2 F up Indoor unit inlet 100h Disabled Fan output 2500h Enabled Thermo ON signal Built in sensor on the remote controller Available During heating operation According to the SW1 7 setting Heat pump Always on while in the heating mode Fan speed setting for Heating Thermo OFF Very Low Low Preset speed Cooling only Enabled Depends ...

Page 126: ...on manual for the function setting W15 3 2 Model Capacity model code SW2 setting W20 4 W25 5 W32 6 W40 8 W50 10 W63 13 W71 14 W80 16 W100 20 W125 25 ON 1 2 3 4 5 6 W10 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 Model Capacity model code SW2 setting ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 7 8 9 10 The f...

Page 127: ... right Remote controller unit Rotary switch Example In case of address 108 Address setting range Setting method Main remote controller 101 150 Add 100 to the smallest address of all the indoor units in the same group Sub remote controller 151 200 Add 150 to the smallest address of all the indoor units in the same group Setting of rotary switch Address No 01 99 1 101 199 with the 100 s digit automa...

Page 128: ...units Error codes are not sent to outdoor units Any time after be ing energized 7 8 9 10 Heat recovery defrost Available Not available Before being ener gized SW002 1 Commissioning mode start SW 1 Not available Available Any time after be ing energized 2 Refer to the Databook 3 Commissioning mode start SW 2 4 Commissioning mode forced termination Not available Available 5 Commissioning mode start ...

Page 129: ...ter be ing energized 2 Before being ener gized 3 4 Freeze up backup threshold selection 1 for brine Refer to the Databook Any time after be ing energized 5 Freeze up backup threshold selection 2 for brine 6 Any time after be ing energized 7 Water temperature ad justment in stop mode heating Not available Available 8 Switch Function Function according to switch setting Switch setting tim ing OFF ON...

Page 130: ...ial processing is completed Initial processing involves data processing in the microcomputer and initial setting of each of the LEV opening This process will take up to 5 minutes During the initial processing the LED monitor on the outdoor unit s control board displays S W version refrigerant type Model and capacity and communication address in turn every second 5 2 3 Startup Control The upper lim...

Page 131: ...5 psi The following conditions are met during the heating mode Compressor frequency after power on is greater than 0 The low pressure 63LS drops One or more minutes after compressor startup if the cumulative compressor operation time is one hour or less three or more minutes if the cumulative compressor operation time is one hour or more When the low pressure 63LS drops below 0 12 MPa 17 psi When ...

Page 132: ... on the left E M200 450 When the rear part of heat exchanger is being defrosted 21S4b will be OFF E M500 When the left part of heat ex changer is being defrosted 21S4c will be OFF Operation SV11 ON OFF When Continuous heating mode E M500 Right part of heat exchanger is being defrosted Other than on the left E M500 When the left part of heat ex changer is being defrosted 21S4c will be OFF 000000498...

Page 133: ...S1 is 3 58MPa 519psi 2 Discharge temperature limit Discharge temperature TH4 of the compressor in operation is monitored and when it exceeds the upper limit the frequency is decreased every minute Operating temperature is 115 C 239 F 3 Periodic frequency control Frequency control other than the ones performed at start up upon status change and for protection is called periodic frequen cy control c...

Page 134: ...efrost cycle is 50 minutes if the last defrost cycle took 12 minutes All units in the heating mode will simultaneously go into the defrost cycle in a system with multiple units The units that are not in operation may or may not go into the defrost cycle depending on the cumulative operation time of their compressors Condition 1 Condition 2 Condition 3 Outside temperature TH7 5ºC 23ºF or above 5ºC ...

Page 135: ...els 147 Hz EM500 model 147 Hz Outdoor unit fan Stopped SV1a ON 21S4a OFF 21S4b 21S4c OFF SV2 ON SV9 ON SV10 SV11 OFF Closed SV14 1 1 Only the EM200 through 450 models have SV14 and SV15 ON Open SV15 1 OFF Open LEV1 0 pulses 2 2 This value may be greater than 0 pulse depending on the 63LS and TH4 status LEV2a 1500 pulses M200 300 3000 pulses M350 500 EM200 500 LEV2b 3000 pulses M200 500 EM500 41 pu...

Page 136: ...defrosting is stopped on all units at the same time 4 Problems during defrost operation If a problem is detected during defrost operation the operation will be stopped and the defrost prohibition time based on the integrated compressor operation time will be set to 20 minutes 5 Change in the number of operating indoor units during defrost operation Even when there is a change in the number of oper...

Page 137: ...tes at 3 6 C 38 5 F to 7 0 C 44 6 F has elapsed Evaporating temperature Te After 3 minutes at 0 C 32 F to 25 C 13 F has elapsed Front bottom HEX in defrost cycle Rear front HEX in defrost cycle Outdoor unit fan 1 1 Only the fixed time control is available on E M200 300 models Left fan Fixed time control Right fan 0 Right fan 0 Left fan Fixed time control SV1a OFF SV2 OFF SV9 ON SV10 ON OFF 21S4a O...

Page 138: ...lues of high pressure 63HS1 and liquid piping temperature TH3 or the superheat that is calculated from the values of low pressure 63LS and the bypass outlet temperature TH2 of the subcool coil LEV opening is controlled based on the values of the inlet TH6 and the outlet TH3 temperatures of the subcool coil high pressure 63HS1 and discharge temperature TH4 In a single outdoor unit system the LEV is...

Page 139: ...ng mode Stopped Fan Thermo OFF cannot be changed to heating from the remote controller If this attempt is mode Heating will flash on the remote controller The opposite is true when the outdoor unit is performing a heating operation The first selection has the priority 50 F 60Hz or F 50Hz Initial startup mode starts Completed in the integrated operation time of 35 minutes Initial startup mode compl...

Page 140: ...t Connector on Outdoor Unit 5 2 17 Control of IH energization without the compressor in operation IH is used to heat the compressor motor on the stopped outdoor unit to make liquid refrigerant in the compressor evaporate or to keep liquid refrigerant from flooding the compressor Initial power on after power is turned on Stays on for 12 hours and then transitions to the operation that is performed ...

Page 141: ...voltage changes with the load on the indoor unit side A sample is shown in the graph above 1 Periodic specified voltage control 1 Periodic control cycle Specified voltage control is performed after the following times have elapsed Thirty seconds after either compressor startup or the completion of the defrost cycle 2 The amount of frequency change The amount of specified voltage change is controll...

Page 142: ...ry 1 minute to keep the amount of superheat before and after the plate heat exchanger constant 2 Heating Thermo ON When three minutes have passed after the LEV operates with initial opening the LEV opening is adjusted every 1 minute to keep the amount of subcool before and after the plate heat exchanger constant Operation mode SV1 Cooling Thermo ON Always OFF Heating Thermo ON Always OFF Defrost A...

Page 143: ...bypass defrost may be performed depending on the water temperature Setting the dip switch 001 10 to ON performs the by pass defrost The bypass defrost The heat recovery defrost Hydro unit refrigerant system TH13 TH32 Prf TH11 TH35 Solenoid valve SV1 Check valve CV1 Refrigrant flow Water flow Water Refrigerant Refrigerant Manual rereif valve MRV Water pressure protection valve PRV Water pump WP1 Wa...

Page 144: ...t cycle The indoor unit fan will stop during defrost Condition 1 Condition 2 Condition 3 Outside temperature TH7 5ºC 23ºF or above 5ºC 23ºF or below Cumulative compressor operation time 50 minutes or more 90 minutes or more if the defrost prohibit timer is set to 90 250 minutes or more Evaporating tempera ture Te The evaporating temperature has stayed below the tempera ture in the table below Note...

Page 145: ...ration status Heating Receiving Defrost signal from OC No Yes Bypass defrost ON OFF Hydro unit Dip switch SW001 10 High pressure heat recovery defrost LEV1 3000 Pump Always in operation Indoor unit FCV during Thermo ON Fully open No No No No Lower the frequency count the No of freezing Freezing is suspected No of freezing 3 times Yes Yes Yes Receiving Defrost signal from OC Recovering from Defrost...

Page 146: ...o unit 2 Heating water temperature backup mode When the heating operation can be continued without receiving heat from the refrigerant due to water temperature rise during heating operation the outlet pipe temperature of the plate heat exchanger is 50ºC or above the outdoor unit goes into the Thermo OFF mode and the heating operation is performed only by circulating the hot water by the water pump...

Page 147: ... 5 3 Hydro Unit Control 28 chapter 5 BS_05_E 5 Control 0000004980 BOOK 28 ページ２０１９年５月９日木曜日午後６時１８分 ...

Page 148: ...ndercharge 2 6 3 2 Checking the Refrigerant Charge during Operation 2 6 3 3 Maximum refrigerant charge 3 6 3 4 Refrigerant Charge Adjustment Mode 4 6 3 5 Calculation of the Amount of Additional Refrigerant 6 6 4 The Following Symptoms Are Normal 8 6 5 Hydro Unit Replacement Instructions 9 6 5 1 Debris removal operation 9 6 5 2 The air vent operation 10 0000004982 BOOK 1 ページ２０１９年５月８日水曜日午後３時４分 ...

Page 149: ...GB_BS_06_E 0000004982 BOOK 2 ページ２０１９年５月８日水曜日午後３時４分 ...

Page 150: ...od of time because of the accumulation of refrigerant in the compressor If insulation resistance is 1 MΩ or below by turning on the main power and keeping it on for at least 12 hours the refrigerant in the compressor will evaporate and the insulation resistance will go up Do not measure the insulation resistance of the terminal block for transmission line for the unit remote controller 4 When the ...

Page 151: ...rcharge and undercharge Overcharging or undercharging of refrigerant can cause the following symptoms Before attempting to adjust the amount of refrigerant in the system thoroughly check the operating conditions of the system Then adjust the refrigerant amount by running the unit in the refrigerant amount adjust mode 6 3 2 Checking the Refrigerant Charge during Operation Operate all indoor units i...

Page 152: ...0 M350 M400 M450 M500 Factory charge kg 6 5 6 5 6 5 9 8 9 8 10 8 10 8 Maximum additional refrigerant charge on site kg 8 5 8 5 8 5 14 0 14 0 19 0 19 0 Maximum refrigerant charge kg 15 0 15 0 15 0 23 8 23 8 29 8 29 8 Total index of the outdoor units EM200 EM250 EM300 EM350 EM400 EM450 EM500 Factory charge kg 6 5 6 5 6 5 9 8 10 8 10 8 10 8 Maximum additional refrigerant charge on site kg 8 5 8 5 8 5...

Page 153: ...TH3 TH6 on the outdoor unit is 5 C 41 F or above and SH on the indoor unit is between 5 and 15 C 41 and 59 F The refrigerant amount may seem adequate at the moment but may turn out to be inadequate later on TH3 TH6 on the outdoor unit is 5 C 41 F or less and SH on the indoor unit is 5 C 41 F or less Wait until the TH3 TH6 reaches 5 C 41 F or above and the SH of the indoor unit is between 5 and 15 ...

Page 154: ...nt to determine its adequacy Keep the unit running for 5 minutes after adjusting the refrigerant amount to determine its adequacy Turn off SW4 922 on the OC Turn on SW4 922 on the OC Adjustment complete Note 4 Has the initial start up mode been completed Gradually add refrigerant from the service port on the low pressure side Gradually add refrigerant from the service port on the low pressure side...

Page 155: ...f additional charge kg ø19 05 total length 0 29 kg m ø15 88 total length 0 2 kg m ø12 7 total length 0 12 kg m ø9 52 total length 0 06 kg m ø6 35 total length 0 024 kg m Outdoor unit model Amount kg Hydro unit model Amount kg E M200 0 WM250 3 0 E M250 0 WM350 3 0 E M300 0 WM500 3 0 E M350 0 E M400 0 E M450 0 E M500 0 Amount of refrigerant to be charged for single module units Amount of additional ...

Page 156: ...al length 0 26 oz ft Outdoor unit model Amount oz Hydro unit model Amount oz E M200 0 WM250 106 E M250 0 WM350 106 E M300 0 WM500 106 E M350 0 E M400 0 E M450 0 E M500 0 Amount of refrigerant to be charged for single module units Amount of additional charge oz ø3 4 total length 2 59 oz ft ø5 8 total length 1 73 oz ft ø1 2 total length 1 08 oz ft ø3 8 total length 0 54 oz ft ø1 4 total length 0 21 ...

Page 157: ...does not reach the set speed when operation switch is turned on STAND BY The fan operates at extra low speed for 5 minutes after it is turned on or until the pipe temperature reaches 35 C 95 F then it operates at low speed for 2 minutes and finally it operates at the set speed Pre heating stand by When the main power is turned on the display shown on the right appears on the in door unit remote co...

Page 158: ... remove the water supply hose after the air vent operation Indoor unit Example PEFY W VMA E 1 Turn on the breaker and then open the auto air vent valve accessary on the water piping and the air vent valves on the indoor units Refer to the Installation Manual for the location of air vent valves If there are air vent valves on the field installed pipes open the valves as well 2 Forty minutes after t...

Page 159: ...s 20 min Step 3 Step 4 The residual air will be removed by operating indoor units for each branch Air2 The saturated air in the circulating water will be removed by performing heating operation for all indoor units and raising the temperature of the circulating water Co 2 Heating operation of all indoor units 20 min Flowchart for air vent operation Set DIPSW 002 3 to ON first and then DIPSW 002 1 ...

Page 160: ...rror Code 2520 21 7 4 10 Error Code 2600 22 7 4 11 Error Code 2601 22 7 5 Error Code Definitions and Solutions Codes 3000 3999 23 7 5 1 Error Code 3121 23 7 5 2 Error Code 3511 24 7 5 3 Error Code 3512 25 7 6 Error Code Definitions and Solutions Codes 4000 4999 26 7 6 1 Error Code 4102 26 7 6 2 Error Code 4106 27 7 6 3 Error Code 4109 27 7 6 4 Error Code 4114 28 7 6 5 Error Code 4115 Detail Code 1...

Page 161: ...Code 5301 Detail Code 117 57 7 7 12 Error Code 5301 Detail Code 119 58 7 7 13 Error Code 5301 Detail Code 120 59 7 7 14 Error Code 5301 Detail Code 127 59 7 7 15 Error Codes 5305 5306 Detail Code 135 60 7 7 16 Error Codes 5305 5306 Detail Code 136 60 7 7 17 Error Code 5701 60 7 8 Error Code Definitions and Solutions Codes 6000 6999 61 7 8 1 Error Code 6201 61 7 8 2 Error Code 6202 61 7 8 3 Error C...

Page 162: ...846 82 7 9 Error Code Definitions and Solutions Codes 7000 7999 83 7 9 1 Error Code 7100 83 7 9 2 Error Code 7101 84 7 9 3 Error Code 7102 85 7 9 4 Error Code 7105 86 7 9 5 Error Code 7106 86 7 9 6 Error Code 7110 87 7 9 7 Error Code 7111 87 7 9 8 Error Code 7113 88 7 9 9 Error Code 7117 89 7 9 10 Error Code 7130 90 0000004984 BOOK 3 ページ２０１９年５月１７日金曜日午前８時２１分 ...

Page 163: ...GB_BS_07_E 0000004984 BOOK 4 ページ２０１９年５月１７日金曜日午前８時２１分 ...

Page 164: ...ontrol valve failure O page 20 2519 2619 Abnormal water pressure drop O page 20 2520 2620 Abnormal water pressure rise O page 21 2600 Water leakage O page 22 2601 Water supply cutoff O page 22 3121 Out of range outside air temperature O page 23 3511 3611 Refrigerant overcooling O page 24 3512 3612 Locked cooling fan O page 25 4102 4152 Open phase O page 26 4106 Transmission power supply fault O pa...

Page 165: ...ited IPM Ground fault O O page 45 105 Overcurrent error due to short circuited motor O O page 46 106 Instantaneous overcurrent breaker error S W detec tion O O page 47 107 Overcurrent breaker error effective value S W detec tion O O page 47 121 DCL overcurrent breaker error hardware detection O page 48 122 DCL overcurrent breaker error software detection O page 48 4250 4350 128 DCL overcurrent bre...

Page 166: ...O page 51 5110 1214 0 Backup operation O 01 Temperature sensor fault Heatsink temperature THHS O O page 52 5111 Temperature sensor fault Hydro unit Liquid side refrigerant temp of heat exchanger TH11 O page 53 5113 Gas siderefrigeranttemp of heat exchanger TH13 O page 53 5120 1248 0 Backup operation O 01 Temperature sensor fault DCL THL O page 53 5132 Temperature sensor fault Hydro unit Water side...

Page 167: ...unit system O page 62 6602 001 Transmission processor hardware error in centralized control system O O O O O page 63 002 Transmission processor hardware error in indoor unit system O O O O O page 63 6603 001 Transmission Bus Busy error in centralized control system O O O O O page 64 002 Transmission Bus Busy error in indoor unit system O O O O O page 64 6606 003 Communication error between device ...

Page 168: ...d units O O page 85 7105 Address setting error O page 86 7106 Attribute setting error O page 86 7110 Connection information signal transmission reception error O page 87 7111 Remote controller sensor fault O O page 87 7113 Function setting error improper connection of CNTYP O O page 88 7117 Model setting error O O page 89 7130 Incompatible unit combination O page 90 Error Code Prelimi nary error c...

Page 169: ...inverter Fan inverter The last digit Inverter system 0 or 1 Compressor inverter system 5 or 6 Fan inverter system INV board Outdoor units Overload protec tion Imax Arms Current effective value error Arms Current peak val ue error Apeak Temperature protection TOL C INV35Y E M200 19 23 39 95 E M250 E M300 56 INV42Y E M350 27 33 E M400 E M450 INV37YC E M500 INV board Outdoor units Overload protec tio...

Page 170: ...le 4300 Detail 01 code Serial communication error Pump inverter 4308 Detail 08 code Serial communication error Power supply board Pump inverter The last digit Inverter system 0 or 1 Pump inverter 8 Power supply board INV board Outdoor units Overload protec tion Imax Arms Current effective value error Arms Current peak val ue error Apeak Temperature protection TOL C INV32 CMH WM250V 2 3 5 0 8 0 100...

Page 171: ...y board and Fan board 2 PS board failure Replace the PS board if the LED on the INV board Fan board or control board is not lit Using the detail codes check the status of the LEDs on the circuit boards below Detail code 1 LED on the INV board Detail code 5 LED on the right Fan board Detail code 6 LED on the left Fan board When the power supply board is normal all LEDs will be lit 3 INV board failu...

Page 172: ...f the problem persists after a power reset replace the inverter board or the control board 7 2 2 Error Code 0404 1 Error code definition Indoor unit control related errors 2 Error definition and error detection method Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board 3 Cause check method and remedy Note Refer also to the Ser...

Page 173: ...ve will start 5 For 30 minutes after the stop the first stop or the second stop of the outdoor unit preliminary errors will be displayed on the LED display 3 Cause check method and remedy Cause Check method and remedy 1 Gas leak gas shortage Refer to the following page s 6 3 Evaluating and Adjusting Refrigerant Charge 2 Overload operation Check operating conditions and operation status of indoor o...

Page 174: ...mediately before start up the operation immediately stops 3 Cause check method and remedy Cause Check method and remedy 1 Inner pressure drop due to a leakage Refer to the following page s 8 5 3 Comparing the Low Pressure Sensor Measurement and Gauge Pressure 2 Low pressure sensor failure 3 Short circuited pressure sensor cable due to torn outer rubber 4 A pin on the male connector is missing 5 Di...

Page 175: ...rm a cooling or heating operation to check the oper ation Cooling Hydro unit LEV1 Heating Hydro unit LEV1 Refer to the following page s 8 8 Troubleshooting LEV FCV Problems 2 Closed refrigerant service valve Confirm that the refrigerant service valve is fully open 3 Short cycle on the indoor unit side Check the indoor units for problems and correct them if any 4 Clogged filter on the indoor unit 5...

Page 176: ...or 30 minutes after the stop of the outdoor unit preliminary errors will be displayed on the LED display 3 Cause check method and remedy 18 Open phase in the power supply due to improper power supply wiring Refer to item 5 in section 6 1 Read before Test Run Cause Check method and remedy 1 Inner pressure drop due to a leakage Refer to the following page s 8 5 1 Comparing the High Pressure Sensor M...

Page 177: ...lso performed while the unit is stopped 4 Preliminary water leakage is cancelled when the following conditions are met One hour after the preliminary water leakage was detected it is not detected that the drain pump goes from OFF to ON The operation mode is changed to Cool Dry The liquid pipe temperature minus the inlet temperature is 10 C 18 F or less 3 Cause check method and remedy Cause Check m...

Page 178: ...t One hour after the preliminary water leakage was detected it is not detected that the drain pump goes from OFF to ON The operation mode is changed to Cool Dry The liquid pipe temperature minus the inlet temperature is 10 C 18 F or less 3 Cause check method and remedy Reference Cause Check method and remedy 1 Drain water drainage problem Clogged drain pump Clogged drain piping Backflow of drain w...

Page 179: ...dy 1 Water circuit is clogged 1 Check for tightened water flow rate control valves or field installed valves 2 Water leaks from the water circuit 2 Check the pump for proper sound If there is air in the circuit it makes a noise 3 Air infiltration through the air vent valve 3 Check that any air vent valves are not installed in the wa ter circuit on the suction side water pump If an air vent valve i...

Page 180: ...Forced stoppage of the outdoor unit Detection timing The error is detected whether the unit is in operation or stopped 7 Ending criteria for the forced stoppage of outdoor unit Power reset the indoor unit that was identified as the error source and the outdoor unit that is connected to the same refrig erant circuit Forced stoppage of the outdoor unit cannot be cancelled by stopping the unit via th...

Page 181: ...unit brings all the indoor units in the same refrigerant circuit that are in any mode other than Fan or Stop to an error stop 2502 appears on the monitor of the units that came to an error stop 6 Forced stoppage of the outdoor unit Detection timing The error is detected whether the unit is in operation or stopped 7 Ending criteria for the forced stoppage of outdoor unit Power reset the indoor unit...

Page 182: ... cycle When the liquid temperature thermistor or suction temperature thermistor or short or open circuited Drain pump is in operation One hour has elapsed since the drain sensor went off Short 90 C 194 F or above Open 20 C 4 F or below 3 Cause check method and remedy Cause Check method and remedy 1 Faulty connector CN31 insertion 1 Check for connector connection failure Reinsert the connector rest...

Page 183: ...ore than 5 minutes after the stop of the outdoor unit the detection is regarded as the first detection and the operation described in step 1 above will start 3 Cause check method and remedy Cause Check method and remedy 1 Loose connectors wiring fault Check that the flow control valve wiring is properly connect ed to CN8A and check the connectors for loose contact If these are not the cause of the...

Page 184: ...isplayed 3 If the pressure rise is detected again during operation after 5 minutes or longer from the first stop the detection is regarded as the first detection and the operation described in step 1 above will start 3 Cause check method and remedy Cause Check method and remedy 1 Clogged pipe Check the strainer for clogging Check the flow rate in the water circuit 2 Water pressure sensor error Che...

Page 185: ...ter supply cutoff 2 Cause check method and remedy Cause Check method and remedy 1 The water tank of the humidifier is empty Check the amount of supply water Check for the solenoid valve and for the connection 2 The solenoid valve for humidification is OFF Check the connector 3 Disconnected float switch Check the connecting part 4 Poor operation of float switch Check for the float switch 5 Frozen w...

Page 186: ...nceled by setting the remote controller Outdoor temperature error is canceled if the units stop during error stop The error display needs to be canceled by setting the remote controller 3 Cause check method and remedy Check the following factors if an error is detected without drop in the outdoor temperature Reference Cause Check method and remedy 1 Thermistor failure Check thermistor resistance 2...

Page 187: ... and this error will be indicated as 3511 4 If the condition THHS A 1 C remains true for continuous 6 minutes and 30 seconds is met regardless of the first or second time after 30 minutes of the first occurrence or after the condition THHS A 1 C remains true for continuous 2 minutes has been met it is considered as the first occurrence and the unit will follow the same behavior as the one describe...

Page 188: ...ooling fan 2 Cooling fan motor trouble Disconnect the wiring from the cooling fan motor and check the insulation resistance and the coil resistance of the motor Replace the motor if problems are found Criteria for insulation failure Insulation failure if below 1 MΩ Wire disconnection Normal if coil resistance is between 56 and 65 Ω 3 Contact failure Check the wiring between CN101 and CN63PW Check ...

Page 189: ...the power supply Power supply voltage drop Check the input voltage to the power supply terminal block TB1 Possible open phase in the power supply due to improper pow er supply wiring Refer to item 5 in section 6 1 Read before Test Run 2 Noise filter problem Coil problem Circuit board failure Check the coil connections Check for coil burnout 3 Wiring failure Check the wiring between CN5 on the nois...

Page 190: ...n power reception failure 3 Cause One of the outdoor units stopped supplying power but no other outdoor units start supplying power 4 Check method and remedy Check the transmission power supply circuit on all outdoor units in a given refrigerant circuit for problems 8 11 2 Trouble shooting Problems with Outdoor Unit Transmission Power Supply Circuit 7 6 3 Error Code 4109 1 Error code definition In...

Page 191: ...contact failure Check the fan motor connector CNMF for proper connection 2 Indoor unit circuit board failure Remove the fan motor connector CNMF and check the voltage at the indoor unit circuit board Testing point 1 280 VDC Between CNMF1 and CNMF4 2 15 VDC Between CNMF5 and CNMF4 Replace the indoor unit circuit board if the voltage is abnormal If the 4114 error persists after the indoor unit circu...

Page 192: ...ontrol board connector CNAC is 198 V or above 5 Control board failure If none of the items described above is applicable and if the trouble re appears even after the power is switched on again replace the control board Cause Check method and remedy 1 Power supply error Check for an occurrence of a n instantaneous power failure at the time of error detection Check that the power supply voltage is 1...

Page 193: ...use check method and remedy 7 6 7 Error Code 4121 1 Error code definition Function setting error 2 Error source cause check method and remedy Cause Check method and remedy 1 Board failure Replace the board 2 Motor malfunction Check for the motor and the solenoid switch 3 Solenoid switch malfunction Error source Cause Check method and remedy Outdoor unit 1 Dip switch setting error on the control bo...

Page 194: ...and Replace the damper limit switch open There is not 5V DC between CN1X1 and Replace the damper limit switch close 4 If damper opens or closes and voltages in 3 are normal measure the voltage between CN1X1 and and the voltage between CN1Y1 and during the damper close by pressing VANE CONTROL button There is not 5V DC between CN1X1 and Replace the damper limit switch open There is not 0V DC betwee...

Page 195: ...or dis tortion 2 Wiring problem Between FT001 FT002 Terminal mounted on PS board and AC reactor ACL 3 Power supply board failure If none of the items described above is applicable and if the trouble reappears even after the power is switched on again replace the PS board Cause Check method and remedy 1 Power supply error Check for an occurrence of a n instantaneous power failure at the time of err...

Page 196: ...inutes Measure the bus voltage RYPN 20 VDC or lower Turn off the power supply and leave it turned off for at least 10 minutes Measure the bus voltage RYPN 1 Check the wiring Between CNVDC INV board and CNDC PS board Between CN301 PS board and CN601 MAIN board 2 Check the fuse F001 INV board 1 Check the wiring Between SC P1 INV board and SC P2 INV board Between CN110 PS board and SC R SC T INV boar...

Page 197: ... and the inlet water temperature TH2 continuously for 5 minutes during cooling operation the error code 4131 will be displayed and the system will come to an abnormal stop 3 Cause check method and remedy Cause Check method and remedy 1 Slightly open indoor unit flow control valve due to pow er cut Turn on the power supply 2 Thermistor failure Check the thermistor value on the LED 3 Failure in the ...

Page 198: ...42Y Check the voltage at relay connector RYPN while the inverter is stopped If the voltage is 420 V or above check the following items 1 Check the LED monitor to see if the bus voltage is above 289 V and replace the inverter board if it is 289 V or below 2 Check the coil L connections and for broken wiring 3 Check the wiring connections between noise filter board and INV board and between INV boar...

Page 199: ...erter Circuit Compo nents 2 If the problem persists after reboot replace the INV board If the voltage is 248 VDC or below check the following items 1 Check the wiring between the following SC P1 INV and SC P2 INV CN110 PS SC R INV and SC T INV FT001 PS FT002 PS and ACL CN301 PS and CN601 MAIN 2 Check the inverter s main circuit components for problems See 8 10 18 Simple Check on Inverter Circuit C...

Page 200: ...ard Hydro unit 1 Different voltage connection Check that the power supply voltage between 198 and 264 VAC is applied to the power supply terminal block TB01 Check the power supply voltage waveform for distortion 2 INV board failure If the problem persists replace the INV board For inverter related error codes refer to the following page s 8 10 Troubleshooting Inverter Problems 7 6 15 Error Code 42...

Page 201: ...ed error codes refer to the following page s 8 10 Troubleshooting Inverter Problems Cause Check method and remedy 1 External noise Refer to the following page s 8 10 2 Checking the Inverter Board Error Detection Circuit 2 INV board failure Cause Check method and remedy 1 External noise Refer to the following page s 8 10 8 Checking the Fan Board Error Detection Circuit at No Load 8 10 9 Checking th...

Page 202: ... before the inverter operation Outdoor unit When Vdc 160 V is detected just before the inverter operation Hydro unit 3 Cause check method and remedy 1 Inverter main circuit failure Same as detail code 108 of 4220 error For inverter related error codes refer to the following page s 8 10 Troubleshooting Inverter Problems Cause Check method and remedy 1 Contact failure INV35Y and INV42Y Check the con...

Page 203: ... stopped If the voltage is 248 VDC or above check the following items 1 Check the inverter s main circuit components for problems See 8 10 18 Simple Check on Inverter Circuit Compo nents 2 If the problem persists after reboot replace the PS board If the voltage is 248 VDC or below check the following items 1 Check the wiring between the following SC P1 INV and SC P2 INV CN110 PS SC R INV and SC T ...

Page 204: ...10 8 Checking the Fan Board Error Detection Circuit at No Load 8 10 9 Checking the Fan Board for Damage at No Load 8 10 10 Checking the Fan Board for Damage with Load 2 THHS failure 1 Check for proper installation of the INV board and FAN board IGBT Check for proper installation of the IGBT heatsink 2 Check the THHS sensor reading on the LED monitor If an abnormal value appears replace the INV boa...

Page 205: ...rcuit at No Load 8 10 9 Checking the Fan Board for Damage at No Load 8 10 10 Checking the Fan Board for Damage with Load 2 Outdoor unit fan failure 1 Check the outdoor unit fan for proper operation Check the fan motor if problems are found with the operation of the fan Refer to the following page s 8 10 7 Checking the Fan Motor for Ground Fault and Coil Resistance Problems 3 Air passage blockage 1...

Page 206: ...he following page s 8 10 Troubleshooting Inverter Problems 5 Compressor failure Check that the compressor has not overheated during operation Check the refrigerant circuit oil return section Refer to the following page s 8 10 3 Checking the Compressor for Ground Fault and Coil Resistance Problems 6 The model selection switches SW5 3 5 8 on the outdoor unit are set incorrectly Check the setting for...

Page 207: ... Damage at No Load 8 10 5 Checking the Inverter for Damage during Compressor Operation 8 10 15 Checking the Installation Conditions Check the IGBT module resistance value of the INV board if no problems are found 8 10 19 Troubleshooting Problems with IGBT Module 2 The model selection switches SW5 3 5 8 on the outdoor unit are set incorrectly Check the setting for the model selection switch on the ...

Page 208: ...ms 8 10 4 Checking the Inverter for Damage at No Load 8 10 5 Checking the Inverter for Damage during Compressor Opera tion 8 10 15 Checking the Installation Conditions Cause Check method and remedy 1 Grounding fault of fan motor Refer to the following page s 8 10 7 Checking the Fan Motor for Ground Fault and Coil Resistance Problems 2 Fan board failure Refer to the following page s 8 10 8 Checking...

Page 209: ...rror codes refer to the following page s 8 10 Troubleshooting Inverter Problems Cause Check method and remedy 1 Short circuited compressor Refer to the following page s 8 10 3 Checking the Compressor for Ground Fault and Coil Resistance Problems 2 Output wiring Check for a short circuit Cause Check method and remedy 1 Short circuited fan motor Refer to the following page s 8 10 7 Checking the Fan ...

Page 210: ...orrectly Check the setting for the model selection switch on the outdoor unit Dipswitches SW5 3 5 8 on the outdoor unit control board For switch settings refer to the following page s 7 9 2 Error Code 7101 Cause Check method and remedy 1 Fan board failure Refer to the following page s 8 10 8 Checking the Fan Board Error Detection Circuit at No Load 8 10 9 Checking the Fan Board for Damage at No Lo...

Page 211: ...e s 8 10 Troubleshooting Inverter Problems Cause Check method and remedy 1 Inverter output related items Refer to the following page s 8 10 2 Checking the Inverter Board Error Detection Circuit Refer to the following page s 8 10 3 Checking the Compressor for Ground Fault and Coil Resistance Problems Refer to the following page s 8 10 4 Checking the Inverter for Damage at No Load Refer to the follo...

Page 212: ...r definition and error detection method Outdoor unit When heatsink temperature THHS remains at or above TOH for 10 minutes or longer after inverter startup Hydro unit When heatsink temperature THHS remains at or above 100 C for 10 minutes or longer after inverter startup 3 Cause check method and remedy Same as 4230 error models TOH INV35Y 42Y 100 C INV37YC 94 C 0000004984 BOOK 49 ページ２０１９年５月１７日金曜...

Page 213: ... short or an open is detected during thermostat ON the outdoor unit turns to anti restart mode for 3 minutes When the error is not restored after 3 minutes if restored the outdoor unit runs normally the outdoor unit makes an error stop Short detectable at 90 C 194 F or higher Open detectable at 40 C 40 F or lower Sensor error at gas side cannot be detected under the following conditions During hea...

Page 214: ... outdoor unit stops turns to anti restart mode for 3 minutes and restarts when the detected temperature of the thermistor When a short or an open is detected again the second detection after the first restart of the outdoor unit the outdoor unit stops turns to anti restart mode for 3 minutes and restarts in 3 minutes when the detected temperature is within the normal range When a short or an open ...

Page 215: ... connector is missing or contact failure Check connector 5 Disconnected wire Check for wire 6 Thermistor input circuit failure on the control board Check the intake temperature of the sensor with the LED monitor When the temperature is far different from the actual temper ature replace the control board Short detection Open detection TH2 70 C 158 F and above 0 4kΩ 40 C 40 F and below 130kΩ TH3 110...

Page 216: ...r during operation applicable to INV37YC only 3 Cause check method and remedy INV37YC For inverter related error codes refer to the following page s 8 10 Troubleshooting Inverter Problems Cause Check method and remedy 1 Thermistor failure Check thermistor resistance 2 Pinched lead wire Check for pinched lead wire 3 Torn wire coating Check for wire coating 4 A pin on the male connector is missing o...

Page 217: ...essure sensor reading of 1 05 MPa 153 psi or above OR 0 05 MPa 7 3 psi or below is detected error code 5201 will appear 3 Cause check method and remedy Cause Check method and remedy 1 High pressure sensor failure Refer to the following page s 8 9 1 Pres sure Sensor 2 Pressure drop due to refrigerant leak 3 Torn wire coating 4 A pin on the male connector is missing or contact failure 5 Disconnected...

Page 218: ...of Pw1 Pw2 50kPa or 1050kPa Pw1 Pw2 is detected error codes 5202 and 5203 will appear 3 Cause check method and remedy Cause Check method and remedy 1 The water outlet pressure sensor is open or short circuited Re gardless of the indoor unit operation status 1 Check that the water outlet pressure sensor is connected Reset the indoor unit error 2 Check the water outlet pressure sensor wir ing for br...

Page 219: ... on the INV board for proper connection 2 INV output phase loss Check the output wire for proper connection 3 ACCT sensor failure Refer to the following page s 8 10 18 Simple Check on Inverter Circuit Components 4 Compressor failure Refer to the following page s 8 10 3 Checking the Compressor for Ground Fault and Coil Resistance Prob lems 5 INV board failure Replace the INV board if the problem pe...

Page 220: ...fer to the following page s 8 10 2 Checking the Inverter Board Error Detection Circuit 8 10 4 Checking the Inverter for Damage at No Load 8 10 5 Checking the Inverter for Damage during Compressor Operation 2 Compressor failure Refer to the following page s 8 10 3 Checking the Compressor for Ground Fault and Coil Resistance Problems Cause Check method and remedy 1 INV board failure Refer to the fol...

Page 221: ...oper connection 2 ACCT sensor failure Refer to the following page s 8 10 18 Simple Check on Inverter Circuit Components 3 Inverter failure Refer to the following page s 8 10 4 Checking the Inverter for Damage at No Load 8 10 5 Checking the Inverter for Damage during Compressor Oper ation 4 Compressor failure Refer to the following page s 8 10 3 Checking the Compressor for Ground Fault and Coil Res...

Page 222: ...d remedy For inverter related error codes refer to the following page s 8 10 Troubleshooting Inverter Problems Cause Check method and remedy 1 ACCT sensor connection error Check the ACCT for proper connection Refer to the following page s 8 10 18 Simple Check on Inverter Cir cuit Components 2 ACCT sensor failure Refer to the following page s 8 10 18 Simple Check on Inverter Circuit Components 3 In...

Page 223: ...ode 5701 1 Error code definition Loose float switch connector 2 Error definition and error detection method Detection of the disconnected float switch open phase condition during operation 3 Cause check method and remedy 1 CN4F disconnection or contact failure Check for disconnection of the connector CN4F on the indoor unit control board Cause Check method and remedy 1 Open output phase of fan boa...

Page 224: ...e data cannot be read out from the built in nonvolatile memory on the remote controller 3 Cause check method and remedy 1 Remote controller failure Replace the remote controller 7 8 2 Error Code 6202 1 Error code definition Remote controller board fault clock IC error 2 Error definition and error detection method This error is detected when the built in clock on the remote controller is not proper...

Page 225: ...ss Outdoor units indoor units hydro units LOSSNAY units controllers such as ME remote controllers Example 6600 01 appears on the remote controller Unit 01 detected the error Two or more units in the system have 01 as their ad dress Find the unit that has the same address as that of the error source Once the unit is found correct the address Then turn off the outdoor units indoor units hydro units ...

Page 226: ...e on the transmission line 7 Voltage is not applied on the transmission line for centralized control in case of grouped indoor units connected to different outdoor units or in case of the system connected with MELANS 4 Check method and remedy NO Tightly reconnect the male power supply connector to the female power supply switch connector CN40 YES YES YES YES YES YES NO NO NO NO Is the transmission...

Page 227: ...NET processor Detail code 003 Communication error between device processor on circuit board and M NET processor The address attribute appeared on the display on the remote controller indicates the controller where an error oc curred 3 Cause check method and remedy Cause Check method and remedy 1 The transmission processor cannot be transmit ted as the short wavelength voltage like noise ex ists co...

Page 228: ... the remote controller indicates the controller which did not provide the response ACK 3 Cause check method and remedy Cause Check method and remedy 1 Incidental cause 1 Turn off the power source of the outdoor unit and turn it on again 2 Contact failure of transmission line of OC or IC 2 If the error is accidental it will run normally If not check the causes 2 5 3 Decrease of transmission line vo...

Page 229: ...rouped operation of multi ple refrigerant systems Types of indoor units experiencing problems Part of the indoor units IC are experiencing problems All indoor units IC in the same system are experiencing problems All indoor units IC are experiencing problems Troubleshooting prob lems for indoor units A Troubleshooting problems for indoor units A Troubleshooting prob lems for indoor units A Trouble...

Page 230: ...ale power supply switch connector CN40 for the transmission line for centralized control 1 Check voltage of the transmission line for central ized control 20 V or more Check 1 on the left Less than 20 V Check 2 on the left 2 Disconnection or shutdown of the power source of the power supply unit for transmission line 3 System controller MELANS malfunction 2 Check the causes of the error indicated b...

Page 231: ...e transmission side The address attribute appeared on the display on the remote controller indicates the controller which did not provide the response ACK 3 Cause check method and remedy Cause Check method and remedy 1 Incidental cause 1 Turn off the power to the outdoor unit and the Hydro unit leave them turned off for at least 5 min utes and then turn them back on 2 When Hydro unit address is ch...

Page 232: ...d remedy 1 Troubleshooting problems for LOSSNAY units Error display ME remote controller RC MA remote controller MA Types of refrigerant systems Single refrigerant system Grouped operation of multiple refrigerant systems Troubleshooting problems for LOSSNAY units Troubleshooting problems for LOSSNAY units Troubleshooting problems for all units A Cause Check method and remedy 1 Incidental cause 1 T...

Page 233: ...tem Grouped operation of mul tiple refrigerant systems Types of indoor units experiencing problems Part of the indoor units IC are experiencing problems All indoor units IC in the same system are experi encing problems All indoor units IC are experiencing problems Troubleshooting problems for ME remote controllers Troubleshooting prob lems for ME remote con trollers Troubleshooting prob lems for M...

Page 234: ...r system controllers Error display ME remote controller RC MA remote controller MA Type of unit controller in error Part of the ME remote con trollers RC are experi encing problems All indoor units IC in the same system are experi encing problems All ME remote controllers RC are experiencing problems Troubleshooting problems for system controllers Troubleshooting prob lems for all units B Troubles...

Page 235: ...no errors are present Indoor unit circuit board failure 4 The male power supply connectors on 2 or more outdoor units are connected to the female power supply switch connector CN40 for centralized control If an error occurs after the unit runs normally once the following causes may be considered Total capacity error 7100 Capacity code error 7101 Error in the number of connected units 7102 Address ...

Page 236: ...indoor units have Use either of the following two methods for dele tion 2 Although the address of LOSSNAY has been changed af ter the interlock registration of LOSSNAY is made using ME remote controller the indoor unit is keeping the mem ory of the previous address 1 Address deletion by ME remote controller Delete unnecessary address information using the manual setting function of ME remote contr...

Page 237: ... voltage signal by exceeding acceptable range of transmission wiring Farthest 200m 656ft or less Remote controller wiring 12m 39ft or less 4 The transmission line voltage signal is decreased due to erroneous sizing of transmission line Wire diameter 1 25mm2 AWG16 or more 4 Check method and remedy 1 If an error occurs during commissioning turn off the power supply to the outdoor units indoor units ...

Page 238: ...gnals from the remote controller 4 Check method and remedy 1 Check for disconnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main power source and the remote controller line 3 Confirm that MA remote controller s capacity limit is not exceeded 4 Check the sub main setting of the MA remote controllers One of them must be se...

Page 239: ...for disconnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main power source and the remote controller line 3 Confirm that MA remote controller s capacity limit is not exceeded 4 Check the sub main setting of the MA remote controllers One of them must be set to MAIN 5 Diagnose the remote controller described in the remote ...

Page 240: ...onnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main power source and the remote controller line 3 Confirm that MA remote controller s capacity limit is not exceeded 4 Check the sub main setting of the MA remote controllers One of them must be set to MAIN 5 Diagnose the remote controller described in the remote controll...

Page 241: ... signals from the remote controller 4 Check method and remedy 1 Check for disconnected or loose transmission lines for the indoor units or MA remote controllers 2 Confirm that the power is supplied to the main power source and the remote controller line 3 Confirm that MA remote controller s capacity limit is not exceeded 4 Check the sub main setting of the MA remote controllers One of them must be...

Page 242: ... Check method and remedy 1 Contact failure short circuit or miswiring converse wiring of in door outdoor unit connecting wire Check disconnecting or looseness of indoor outdoor unit connecting wire of indoor unit or outdoor unit Check all the units in case of twin triple quadruple indoor unit system 2 Defective transmitting receiving circuit of outdoor controller cir cuit board Turn the power off ...

Page 243: ... if 1 receiving is detected 30 times continuously though indoor controller board has transmitted 0 3 Cause check method and remedy Note Refer also to the Service Handbook for the indoor units Cause Check method and remedy 1 Defective transmitting receiving circuit of indoor controller board Turn the power off and on again to check If abnormality generates again replace indoor controller board 2 No...

Page 244: ...ting wire Check disconnecting or looseness of indoor outdoor unit connecting wire of all indoor units or outdoor units 2 Defective transmitting receiving circuit of outdoor controller cir cuit board Turn the power off and on again to check If abnormality generates again replace indoor controller board or outdoor controller circuit board Note other indoor controller board may have defect 3 Defectiv...

Page 245: ...r and outdoor units 2 Diameter or length of indoor outdoor unit connecting wire is out of specified capacity Check the following Diameter of the cables used for indoor outdoor lines maximum line distance between indoor and outdoor units max 50 m maximum line distance be tween indoor units daisy changed cables max 30 m and if flat cables such as VVF is used make sure they are connected in the order...

Page 246: ...or unit board When the model name set by the switch is dif ferent from that of the unit connected turn off the power source of the outdoor and the indoor units and change the setting of the Qj capac ity code 3 Indoor unit Qj table 2 The model selection switches SW5 3 5 8 on the outdoor unit are set incorrectly Check the setting for the model selection switch on the outdoor unit Dipswitches SW5 3 5...

Page 247: ...city code The capacity of the indoor unit can be con firmed by the self diagnosis function SW1 operation of the outdoor unit Outdoor unit 2 The model selection switches SW5 3 5 8 on the outdoor unit are set incorrectly Check the setting for the model selection switch on the outdoor unit Dipswitches SW5 3 5 8 on the outdoor unit control board Hydro unit 3 The model name capacity code setting is wro...

Page 248: ...ill appear 3 Check whether the transmission line for the terminal block for cen tralized control TB7 is not con nected to the terminal block for the indoor outdoor transmission line TB3 ME remote controller Nothing appears on the remote controller be cause it is not powered MA remote controller HO or PLEASE WAIT blinks 4 The model selection switch SW5 7 on the out door unit is set to OFF Normally ...

Page 249: ... address of outdoor unit is not being set to 51 100 Check that the address of OC unit is set to 51 100 Reset the address if it stays out of the range while shutting the power source off Error source Cause Check method and remedy A remote controller for use with indoor units such as the MA remote controller is connected to the OA processing unit whose attribute is FU To operate the OA processing un...

Page 250: ...1 Power to the transmission booster is cut off 1 Confirm that the power to the transmission booster is not cut off by the booster being connected to the switch on the indoor unit The unit will not function properly unless the transmission booster is turned on 2 Power resetting of the transmission booster and outdoor unit Reset the power to the outdoor unit 3 The model selection switch SW5 7 on the...

Page 251: ...nnector CNTYP5 on the control board for proper con nection 3 Check the settings of SW5 3 through SW5 6 on the control board Detail code 16 1 Check the connector CNTYP on the INV board for proper connec tion 2 Check the connector CNTYP5 on the control board for proper con nection 3 Check the settings of SW5 3 through SW5 6 on the control board 4 Check the wiring between the control board and INV bo...

Page 252: ...e connector CNTYP on the INV board for proper connection 2 Check the connector CNTYP5 on the control board for proper connection 3 Check the wiring between the control board and INV board Refer to the following page s 7 2 1 Error Code 0403 Detail code 0 1 5 6 1 Check the wiring between the control board and INV board Refer to the following page s 7 2 1 Error Code 0403 2 Check the settings of SW5 3...

Page 253: ...d remedy Error source Cause Check method and remedy Outdoor unit The connected indoor unit is for use with R22 R407C or R410A The M NET connection adapter is connected to the indoor unit system in a system in which the Slim Model A control of units are con nected to the M NET Indoor units that are incompatible with the HVRF system are connected Check the connected indoor unit model Check whether t...

Page 254: ... Configuration 63LS 21 8 6 Troubleshooting Solenoid Valve Problems 22 8 7 Troubleshooting Outdoor Unit Fan Problems 24 8 8 Troubleshooting LEV FCV Problems 25 8 8 1 General Overview on LEV Operation 25 8 8 2 General Overview on LEV Operation Hydro unit 27 8 8 3 Possible Problems and Solutions 29 8 8 4 General Overview on FCV Operation Indoor unit 30 8 8 5 Coil Removal Instructions 32 8 9 Troublesh...

Page 255: ...n Wiring Installation 75 8 13 3 Four way Valve and Check Valve Replacement Procedure 79 8 13 4 Compressor Replacement Procedure 91 8 13 5 Removal Instructions for the Control Box 93 8 13 6 Maintenance Procedure for the Drain Pan 96 8 13 7 Maintenance Procedures for the Heat Exchanger 102 8 13 8 Accumulator Replacement Procedure 116 8 14 Hydro Unit Maintenance Instructions 120 8 14 1 Plate Heat Exc...

Page 256: ...able Reversed connection of the wire for the MA remote controller and the M NET transmission line on the indoor unit 3 The number of the MA remote controllers that are connected to an indoor unit exceeds the allowable range 2 units 4 The length or the diameter of the wire for the MA remote controller are out of specification 5 Short circuit of the wire for the remote display output of the outdoor ...

Page 257: ...ors on the multiple outdoor units are connected to the female power supply switch connector CN40 In the system to which the power supply unit for transmission lines is connected the male power supply connector is connect ed to the female power supply switch connector CN40 on the outdoor unit 4 Disconnected M NET transmission line on the indoor unit side 5 Disconnected wire between the terminal blo...

Page 258: ... indoor unit board CN2M or disconnected connector 6 Incorrect wiring for the MA remote controller Short circuited wire for the MA remote controller Disconnected wire for the MA remote controller No 2 and disconnected line to the terminal block Reversed daisy chain connection between groups Incorrect wiring for the MA remote controller to the terminal block for transmission line connection TB5 on t...

Page 259: ...occur when the power is reset Check that no error occurs in other indoor units Check the indoor unit on which LED2 is lit All the indoor unit power failure All the indoor unit power failure Error display Error display Thermo is OFF Is operation possible Short circuit of the remote controller After turning the power on check whether HO PLEASE WAIT is displayed on the remote controller After more th...

Page 260: ...nal block The indoor transmission line is connected incorrectly to the transmission terminal block for centralized controller TB7 4 Disconnected transmission line on the remote controller 5 Remote controller failure 6 Outdoor unit failure For details refer to the following page s 8 15 Troubleshooting Problems Using the LED Status Indica tors on the Outdoor Unit 3 Check method and remedy 1 Check vo...

Page 261: ... 1 1 Check LED1 on the indoor unit control board Is it lit When it is lit When it is off or cannot be checked Check for the change of LED display by operating dip switch for self diagnosis Check voltage of the power supply terminal on the indoor unit AC220V Check the fuse on the circuit board Melted Check 200V circuit for short circuit and ground fault Check the connection of the connector Check t...

Page 262: ...ne connection TB5 of the indoor unit and the male connector CN2M 7 The male power supply connectors on 2 or more outdoor units are connected to the female power supply switch connector CN40 for the transmission line for centralized control 8 Outdoor unit control board failure 9 Indoor unit control board failure 10 Remote controller failure Interlocking control with MELANS 1 No group registration i...

Page 263: ... the outdoor unit Wrong switch setting Change it from ON to OFF A wrong address is set to the ME remote controller A wrong address is set to the indoor unit Wrong wiring of the M NET transmission line of the indoor unit Disconnected connector CN2M Correct the error Disconnected 17 30V ME remote controller 100 Check the address of the indoor unit to be coupled Indoor unit 100 Check the address of t...

Page 264: ...ifferent outdoor units are grouped 6 The power of the outdoor unit to be confirmed has been cut off 5 Check the power supply of the outdoor unit which is coupled with the unit to be confirmed 7 Transmission line is disconnected from the terminal block for central control system connection TB7 on the outdoor unit 6 Check that the transmission line for centralized control TB7 of the outdoor unit is ...

Page 265: ...ring the High Pressure Sensor Measurement and Gauge Pressure Note Lower inlet pressure by the low pressure sensor than the actual pressure causes insufficient capacity SW4 setting SW6 10 OFF 2 Check temperature difference between the evaporat ing temperature Te and the target evaporating tem perature Tem with self diagnosis LED Note Higher Te than Tem causes insufficient capacity SW4 setting SW6 1...

Page 266: ...djusting Refrigerant Charge 7 Clogging by foreign object Check the temperature difference between in front of and behind the place where the foreign object is clogging the pipe upstream side and downstream side When the temperature drops significantly the foreign object may clog the pipe Remove the foreign object inside the pipe 8 The indoor unit temperature is excessively low Less than 15 C 59 F ...

Page 267: ...sor Measurement and Gauge Pressure Note Higher inlet pressure by the high pressure sensor than the actual pressure causes insufficient capac ity SW4 setting SW6 10 OFF 2 Check the difference between the condensing tem perature Tc and the target condensing tempera ture Tcm with self diagnosis LED Note Higher Tc than Tcm causes insufficient capacity SW4 setting SW6 10 OFF Note Protection works and c...

Page 268: ...d Since blockage in the extended section is difficult to locate operate the unit in the cooling cycle and follow the same procedures that are used to locate the blockage of pipe during cooling operation Remove the blockage in the pipe 9 The indoor unit inlet temperature is excessively high exceeding 28 C 82 F Check the inlet air temperature and for short cy cling Change the environment where the i...

Page 269: ... on LED display with SW4 2 Abnormal discharge air temperature 3 Heatsink thermistor failure Refer to the reference page for each error mode Display the indoor piping temperature table with SW4 to check whether the freeze proof operation runs properly and check the temperature 4 Thermistor failure 5 Pressure sensor failure Refer to the following page s 10 LED Status Indi cators 6 Over current break...

Page 270: ...eld of the transmission line is grounded 2 The sectional voltage level of transmission signal should be as follows Cause Erroneous operation Error code Error code definition Noise interference on the transmission line Signal is transformed and will be misjudged as the signal of another address 6600 Address overlap Transmission wave pattern is transformed due to the noise creating a new signal 6602...

Page 271: ...d the noise on the transmission line can not escape leading to change of the transmission signal 6 Check the treatment meth od of the shield of the transmission line for cen tralized control The transmission cable for centralized control is less subject to noise interference if it is grounded to the outdoor unit whose power jumper cable was moved from CN41 to CN40 or to the power sup ply unit The ...

Page 272: ...ion line and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row MA transmission error 6831 will occur 2 Confirmation of transmission specifications and wave pattern A B No polarity Across terminal No 1 2 Power supply 9V to 12VDC Satisfies the formula 12 msec bit 5 Voltage among terminals must be between DC9 and 12 V TB15 A B 1 2 MA remote c...

Page 273: ...diagnosis LED1 while the sen sor is running Compare them by MPa psi unit 1 When the difference between both pressures is within 0 098MPa 14psi both the high pressure sensor and the control board are normal 2 When the difference between both pressures exceeds 0 098MPa 14psi the high pressure sensor has a problem perfor mance deterioration 3 When the pressure displayed on self diagnosis LED1 does no...

Page 274: ...voltage will be converted by the microcomputer The output voltage is 0 071V per 0 098MPa 14psi The pressure sensor on the body side is designed to connect to the connector The connector pin number on the body side is different from that on the control board side Body side Control board side Vcc Pin 1 Pin 3 Vout Pin 2 Pin 2 GND Pin 3 Pin 1 0 0 5 73 1 0 145 1 5 218 2 0 290 2 5 363 3 0 435 3 5 508 4 ...

Page 275: ...as a problem performance dete rioration 3 When the pressure displayed on the self diagnosis LED1 does not change the low pressure sensor has a problem 3 Remove the low pressure sensor from the control board to check the pressure with the self diagnosis LED1 display 1 When the pressure displayed on the self diagnosis LED1 is between 0 and 0 098MPa 14psi the low pressure sensor has a problem 2 When ...

Page 276: ...voltage will be converted by the microcomputer The output voltage is 0 173V per 0 098MPa 14psi The pressure sensor on the body side is designed to connect to the connector The connector pin number on the body side is different from that on the control board side Body side Control board side Vcc Pin 1 Pin 3 Vout Pin 2 Pin 2 GND Pin 3 Pin 1 0 0 2 29 0 4 58 0 6 87 0 8 116 1 0 145 1 2 174 1 4 203 1 6 ...

Page 277: ...pe when checking the temperature as the pipe on the oil separator side will be hot Do not give an impact from outside as the outer hull will be deformed leading to the malfunction of the inner valve 2 21S4b 4 way switching valve 21S4c 4 way switching valve 21S4c is only on the E M500 models About this 4 way valve When not powered Conducts electricity between the oil separator outlet and heat excha...

Page 278: ... valve can be checked on the LED display and by the switching sound 6 SV10 Solenoid valve This solenoid valve is a switching valve that opens when energized Proper operation of this valve can be checked on the LED display and by the switching sound 7 SV11 Solenoid valve This solenoid valve is a switching valve that opens when energized Proper operation of this valve can be checked on the LED displ...

Page 279: ...indoor unit operation capacity is low the revolution of the fan may change If the fan does not move or it vibrates fan board problem or fan motor problem is suspected When checking the fan motor for problems by shutting down the power be sure to disconnect the motor wire from the fan board If a short circuited fan board malfunctions it will keep the fan motor from rotating smoothly For details ref...

Page 280: ...en the Valve is closed 1 2 3 4 1 Valve is open 4 3 2 1 4 1 When the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoothly and rattles and vibrates Upon power on the indoor unit circuit board sends a 2200 pulse signal to the indoor unit LEV and a 3200 pulse signal to the outdoor unit LEV to determine the valve...

Page 281: ... 1 8 1 When the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoothly and rattles and vibrates Output phase number Output state Upon power on the indoor unit circuit board sends a 520 pulse signal to the indoor unit LEV to determine the valve position and always brings the valve to the position as indicated b...

Page 282: ... 2 Pulse signal output and valve operation ø4 ø3 ø2 ø1 ø4 ø3 ø2 ø1 Control board Drive circuit LEV M 5 2 1 3 4 6 DC12V Brown Blue Orange Yellow White Orange White Blue Yellow Red 6 5 4 3 2 1 Output state Output phase number 1 2 3 4 1 ON OFF OFF ON 2 ON ON OFF OFF 3 OFF ON ON OFF 4 OFF OFF ON ON Output pulses change in the following orders when the Valve is closed 1 2 3 4 1 Valve is open 4 3 2 1 4 ...

Page 283: ...it fail ure Disconnect the control board connector and connect the check LED as shown in the figure below resistance 0 25W 1k LED DC15V 20mA or more When the main power is turned on the indoor unit cir cuit board outputs pulse signals to the indoor unit LEV for 10 seconds If any of the LED remains lit or unlit the drive circuit is faulty When the drive circuit has a problem replace the control boa...

Page 284: ...ocked the drive motor runs idle and makes a small clicking sound When the valve makes a closing and opening sound the valve has a problem Replace the LEV Hydro Outdoor Disconnected or short circuited LEV motor coil Measure the resistance between coils red white red orange brown yellow brown blue with a tester When the resistance is in the range of 150Ω 10 the LEV is normal Replace the LEV coils Hy...

Page 285: ...and valve operation A Yellow G Orange B White H Purple C Black I Control board D Brown J Connection CN60 E Green K Drive circuit F Blue L Flow control valve Output phase number Output status The output pulse changes in the following order When the valve closes 1 2 3 4 1 When the valve opens 4 3 2 1 4 1 2 3 4 4 ON ON OFF OFF 5 OFF ON ON OFF 7 OFF OFF ON ON 8 ON OFF OFF ON M L I A B C D E F G H J K ...

Page 286: ...on mode Judgment method Remedy 1 Loose connector Check for connector connection failure Reinsert the connector restart the operation and check for proper operation 2 Wiring fault flow control valve fault Check for a broken wiring and check the resistance of the flow control valve Replace the flow control valve 3 Control board fault If no problems are found with the above items replace the control ...

Page 287: ...out the coils toward the top If the coils are pulled out without the body gripped undue force will be applied and the pipe will be bent 3 Installing the coils Fix the body tightly at the bottom Part A in the figure so that the body will not move then insert the coils from the top and insert the coil stopper securely in the pipe on the body If the coils are pushed without the body gripped undue for...

Page 288: ...stopper is re moved pull up and out the coil When removing the coil hold the LEV body securely to prevent undue force from being placed on the pipe and bending the pipe 3 Installing the coil Securely hold the bottom of the LEV Part A in the figure insert the coil from above and turn the coil until the coil stopper is properly installed on the LEV body When removing the coil hold the LEV body secur...

Page 289: ...heck whether the contact of the pressure sensor connector in trouble is not faulty OK OK Check that the difference between each detected pressure is 0 098MPa 14psi or less OK Both the board and the pressure sensor are normal OK Is Pd P1 Ps Remove the pressure sensor connector from the board and check the pressure OK OK Check whether the refrigerant pipe and the transmission line are connected corr...

Page 290: ...nections 3 Check the pressure value on the self diagnosis switch same as note 2 with the connector of the applied pressure sensor is disconnected from the board Measurement data SW4 setting value Outdoor high pressure Outdoor low pressure Symbol 63HS1 63LS ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 5 6 7 8 9 10 The figure at left shows that the switches 1 through 5 are set to ON an...

Page 291: ...N402 Pull out the thermistor connector in trouble from the board Measure the temperature of the thermistor in trouble actual measurement value Check the thermistor resistor Compare the temperature corresponding to the resistance measured by the thermistor and the temperature measured by a commercially available thermometer and check whether there is no difference between them Insert the connector ...

Page 292: ...SV1 ON Check that SV1 is OFF SV1 OFF YES NO YES YES YES NO Check whether the electric expansion valve and the solenoid valve connector are not disconnected or not loose Run the cooling operation or the heating operation in the system in trouble only in one system No cooling capacity No heating capacity Repair the fault Fault is found Note 1 Note 1 NO Check that LEV1 is controlling the superheat Co...

Page 293: ...ctor and check the colors of the lead wires visually Intermediate connector Control board Check that no refrigerant leaks from LEV Pull out the connector from the board and check that the electricity runs with a tester The wiring side of CN05 and 07 Among 1 3 and 5 and among 2 4 and 6 Check the resistance between each coil with a tester between red and white red and orange brown and yellow and bro...

Page 294: ...the pump will require replacing Internal mechanical failure such as bearing failure turbine failure magnet degradation This will require pump replacement Before replacement the causes must be investigated and resolved The pump shaft bearings and magnets can be easily dam aged by overheating due to dry running or water system blockage Check the strainer for blockage investigate the water circuit fo...

Page 295: ...lay connectors of the outdoor unit fan RYFAN1 and RYFAN2 Before plugging in or unplugging connectors check that the outdoor unit fan is not rotating and that the voltage across Pin 1 and Pin 5 of connector RYPN is 20 VDC or less The capacitor may collect a charge and cause an electric shock when the outdoor unit fan rotates in windy conditions Refer to the wiring nameplate for details 3 Reconnect ...

Page 296: ... Error Detection Circuit at No Load 8 10 9 Checking the Fan Board for Damage at No Load 8 10 10 Checking the Fan Board for Damage with Load 9 Only the hydro unit pump does not work When the hydro unit is in operation see related pages 8 10 12 Checking the Error Detection Circuit on the Pump INV Board Without load 8 10 13 Checking the Pump INV Board for Damage Without load 8 10 14 Checking the Pump...

Page 297: ...ms Items to be checked Phenomena Remedy 1 Stop the unit Remove power supply 1 Overcurrent error Error code 4250 Detail code No 101 104 105 106 and 107 Replace the INV board 2 Disconnect the inverter output wires from the compressor terminals U V W 1 2 Logic error Error code 4220 Detail code No 111 Replace the INV board 3 Apply power supply 3 ACCT sensor circuit failure Error code 5301 Detail code ...

Page 298: ...e of Refrigerant Circuit Parts for how to move the MAIN BOX Items to be checked Phenomena Remedy 1 Stop the unit Remove power supply 1 Inverter related problems are detected Set SW7 1 on the MAIN board to ON and go to 8 10 2 Checking the Invert er Board Error Detection Circuit 2 Disconnect the inverter output wires from the compressor terminals U V W 1 2 Inverter voltage is not output at the termi...

Page 299: ...ssures are balanced c Check that no liquid refrigerant is present in the compressor and that there is no liquid backflow Go to d when the problem per sists after compressor startup was repeated several times d Check that there is a pressure dif ference between high and low pressures after compressor start up Check the high pressure with LED monitor for changes Replace the compressor if there is no...

Page 300: ...there is a pressure dif ference between high and low pressures after compressor start up Check the high pressure with LED monitor for changes Replace the compressor if there is no pressure difference the com pressor may be locked c Check for interphase voltage im balance d Replace the INV board if no prob lems were found with the items a or c e If the problem persists after replac ing the inverter...

Page 301: ...verter circuit goes into opera tion Error code 4220 Detail code 109 110 112 a If the problem persists after startup re place the inverter board b If the problem persists after replacing the inverter board replace the DCL 4 No problems were found with items 1 through 3 Normal Items to be checked Phenomena Remedy Remove fan motor winding Check insulation resistance and coil resis tance 1 Fan motor i...

Page 302: ... fan motors RYFAN1 cor responds to the right fan and RYFAN2 corresponds to the left fan when seen from the front 2 Inter wire voltage imbalance of 5 V or above Replace the fan board 3 Set SW7 2 on the control board to ON On a model with two fan motors set SW7 2 left fan when seen from the front or SW7 4 right fan when seen from the front to ON 3 No inter wire voltage imbalance ex ists A current se...

Page 303: ...t 3 Sensor error during operation Check code 5305 5306 Detail code 135 136 a Check for disconnection of fan in verter output wiring and for broken wiring b If the error is not associated with any of the items above replace the fan board c Change fan motor if Fan board change doesn t resolve issue 4 Voltage overload error Check code 4225 4226 Detail code 109 a Check for gusts or windy conditions b ...

Page 304: ...SC W 2 Logic error occurs Check code 4220 Detail code 111 Replace the INV board 2 Operate the outdoor unit and the hydro unit 3 Sensor related circuit error occurs Check code 5301 Detail code 117 127 Replace the INV board 4 Open circuited IPM error occurs Check code 5301 Detail code 119 Normal Items to be checked Phenomena Remedy INV32 1 Inverter related error is detected Set SW 1 1 on the INV boa...

Page 305: ...of at least 5 or 5 V occurs If line voltage imbalance exists INV32 Replace the INV board Items to be checked Phenomena Remedy 1 Check refrigerant charge Overcharge of refrigerant Return to correct refrigerant charge 2 Check outdoor unit branch in stallation The branch approach 500 mm Make branch approach 500mm Is the branch angle 15 to horizontal Make branch angle 15 Items to be checked Phenomena ...

Page 306: ...n earth leakage breaker 2 Check the resistance at the power supply terminal block TB1 with a megger Failure resistance value Check each part and wiring Refer to the following page s 8 10 18 Simple Check on Inverter Circuit Compo nents IGBT module Rush current protection resistor Electromagnetic relay DC reactor 3 Disconnect the compressor wir ings and check the resistance of the compressor with a ...

Page 307: ...ce between terminals M200 M450 M500 DC reactor DCL Measure the resistance between terminals 1Ω or lower almost 0 Ω Measure the resistance between terminals and the chassis Current sensor ACCT Disconnect the wiring connector from CNCT2 and measure the inter teminal resistance 280Ω 30Ω Between pins 1 and 2 U phase pins 3 and 4 W phase 4 3 2 1 Coil Contact INV board X901 X902 Across pins 1 2 INV boar...

Page 308: ... open Ω or not shorted to 0 Ω The values are for reference and the margin of errors is allowed The result that is more than double or half of the result that is measured at the same measurement point is not allowed Disconnect all the wiring connected the INV board and make the measurement 2 Tester restriction Use the tester whose internal electrical power source is 1 5V or greater Use the dry batt...

Page 309: ...ence resistance value Black SC PL CN N SC L1 SC L2 SC L3 Red SC PL 5 200 Ω 5 200 Ω 5 200 Ω CN N SC L1 5 200 Ω SC L2 5 200 Ω SC L3 5 200 Ω Black SC P1L CN N SC U SC V SC W Red SC P1L 5 200 Ω 5 200 Ω 5 200 Ω CN N SC U 5 200 Ω SC V 5 200 Ω SC W 5 200 Ω CN N SC L3 SC L2 SC L1 SC P1L SC U SC V SC W SC PL 0000004986 BOOK 54 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 310: ...ference resistance value Black SC P CN N SC L1 SC L2 SC L3L Red SC P 5 200 Ω 5 200 Ω 5 200 Ω CN N SC L1 5 200 Ω SC L2 5 200 Ω SC L3 5 200 Ω Black SC P1 CN N SC U SC V SC W Red SC P1 5 200 Ω 5 200 Ω 5 200 Ω CN N SC U 5 200 Ω SC V 5 200 Ω SC W 5 200 Ω SC L1 SC L2 SC L3 SC U CN N SC P SC P1 SC V SC W 0000004986 BOOK 55 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 311: ...e value Black SC L1 SC L2 SC L3 SC B SC L FT100 CN N Red SC L1 5 200 Ω SC L2 5 200 Ω SC L3 5 200 Ω SC B SC L 5 200 Ω 5 200 Ω 5 200 Ω FT100 5 200 Ω CN N Black FT100 CN N SC U SC V SC W Red FT100 5 200 Ω 5 200 Ω 5 200 Ω CN N SC U 5 200 Ω SC V 5 200 Ω SC W 5 200 Ω SC W SC V SC U SC L FT100 CN N SC B SC L3 SC L2 SC L1 0000004986 BOOK 56 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 312: ...s INV board outline drawing INV32 Reference resistance value Black P N SC R SC T Red P 5 200 Ω 5 200 Ω N SC R 5 200 Ω SC T 5 200 Ω Black P N SC U SC V SC W Red P 5 200 Ω 5 200 Ω 5 200 Ω N SC U 5 200 Ω SC V 5 200 Ω SC W 5 200 Ω SC V SC U P N SC W SC T SC S SC R 0000004986 BOOK 57 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 313: ...00 E M350 500 Service panel Main control box Inverter box Top section of the duct Remove the two screws holding the top section of the duct Remove the two screws holding the top section of the duct Top section of the duct 3 Remove the upper section of the duct by unscrewing the screws on the control box on the inverter box on the E M200 300 models shown in the figure below Check inside the duct fo...

Page 314: ...sion line for centralized control 24 30 VDC TB7 Indoor outdoor transmission block 24 30 VDC TB3 CN40 TB1 AC Power source 380 V 415 V Power supply terminal block Inverter board Rectifier Rectifier 72C DCL 5 V power supply Smoothing capacitor Inverter Microcomputer Inverter drive circuit Compressor Noise filter Fuse Fuse Surge protector Solenoid valve Four way valve Control board Fuse Microcomputer ...

Page 315: ...ET transmission line Non polar 2 wire TB1 AC Power source 380 415 V Power supply terminal block Outdoor unit CN40 Inverter board Rectifier Rectifier 72C DCL 5 V power supply Smoothing capacitor Inverter Microcomputer Inverter drive circuit Compressor Noise filter Fuse Fuse Surge protector Solenoid valve Four way valve Control board Fuse Microcomputer FAN board Fuse Heat exchanger fan Microcomputer...

Page 316: ...C Power source 380 415 V Power supply terminal block Outdoor unit CN40 Inverter board Rectifier Rectifier 72C DCL 5 V power supply Smoothing capacitor Inverter Microcomputer Inverter drive circuit Compressor Noise filter Fuse Fuse Fuse Surge protector Solenoid valve Four way valve Control board Fuse Microcomputer FAN board Fuse Heat exchanger fan Microcomputer 5 V power supply FAN board Fuse Heat ...

Page 317: ...rocomputer MAIN Microcomputer PS DC DC converter Smoothing capacitor Rectifier diode Rectifier diode Pump Regulator Regulator AC Power source 220 240 VAC TB01 Terminal block for power source Power reception switching TB3 X52 LEV Indoor outdoor transmission block 24 30 VDC Regulator Microcomputer 5 V power supply Inverter drive circuit Inverter 13Vpowersupply 17Vpowersupply 15Vpowersupply 12V power...

Page 318: ...ission line from TB3 Check whether the male connector is connected to the female power supply connector CN40 Connected Check voltage of terminal block for centralized control TB7 Check voltage of TB7 by removing transmission line from TB7 Check the voltage across pins 3 and 4 of CNPW on the control board Check the voltage across pins 1 and 2 of CNPW on the control board Check the voltage across pi...

Page 319: ... board YES NO Any problems with wiring or loose connectors Correct wiring problems and tighten loose connectors Replace the power supply board Check the wiring between the noise filter board and TB1 of power supply board and also check connectors L2 N of TB1 TB12 and TB14 for proper connections Check for conductivity between TB12 and pin 1 of CN1 and between TB14 and pin 3 of CN1 Check the voltage...

Page 320: ...nnector is connected to the female power supply connector CN40 Connected Check voltage of terminal block for centralized control TB7 Check voltage of TB7 by removing transmission line from TB7 Check the voltage across pins 3 and 4 of CNPW on the control board Check the voltage across pins 1 and 2 of CNPW on the control board Check the voltage across pins 1 and 2 of CN600 on the control board Check...

Page 321: ...the noise filter Check the power supply wiring and the main power supply and correct any problems found Turn the power supply back on Check the wiring between the noise filter board and TB1 of power supply board and also check connectors L2 N of TB1 TB12 and TB14 for proper connections Check the voltage across L2 and N of power supply terminal block TB1 Check for conductivity between TB12 and pin ...

Page 322: ...onnector is connected to the female power supply connector CN40 Connected Check voltage of terminal block for centralized control TB7 Check voltage of TB7 by removing transmission line from TB7 Check the voltage across pins 3 and 4 of CNPW on the control board Check the voltage across pins 1 and 2 of CNPW on the control board Check the voltage across pins 1 and 2 of CN600 on the control board Chec...

Page 323: ...the noise filter Check the power supply wiring and the main power supply and correct any problems found Turn the power supply back on Check the wiring between the noise filter board and TB1 of power supply board and also check connectors L2 N of TB1 TB12 and TB14 for proper connections Check the voltage across L2 and N of power supply terminal block TB1 Check for conductivity between TB12 and pin ...

Page 324: ... the remote controller for all the indoor units to the cooling mode 3 Check that all the indoor units are performing a cooling operation 2 Check the values of Tc and TH6 To display the values on the LED screen use the self diagnosis switch SW4 when SW6 10 is set to OFF on the outdoor unit control board 1 When Tc TH6 is 10 C 18 F or more See the next item 3 2 When Tc TH6 is less than 10 C 18 F Afte...

Page 325: ...all the indoor units and stop the compressor 1 To stop all the indoor units and the compressors turn SW4 769 from ON to OFF when SW3 1 on the outdoor control board is ON 2 Check that all the indoor units are stopped 3 Close the service valves BV1 and BV2 4 Collect the refrigerant that remains inside extension pipe hydro unit and optional unit Do not discharge refrigerant into the atmosphere when i...

Page 326: ...e and then fix the drain pan cover in place with a cable tie Figures 2 and 3 show the cable ties to be cut 3 Remove the drain pan by unscrewing the two screws See Figure 2 Be sure to remove the two rod holders holding the check joints to the drain pan See Figure 3 4 Remove the top attachment connecting the main control box and the inverter control box by unscrewing the two screws See Figure 4 5 Re...

Page 327: ...hat no undue force is applied to the wires from which cable straps were removed in steps 7 through 12 Position the bottom attachment that was removed in step 5 above on the fin guard as shown in Figure 13 and then hook the main control box on the attachment as shown in Figure 12 15 Place the excess weak and strong electrical wirings in the space at the base legs as shown in Figure 14 to keep them ...

Page 328: ... Be sure to remove the two rod holders holding the check joints to the drain pan Figures 2 and 3 show the cable ties to be cut 7 Remove the two cable straps holding the weak electrical wiring and the two cable straps holding the strong electrical wiring from the control box See Figure 4 8 Place the excess weak and strong electrical wirings in the space at the base legs as shown in Figure 5 to keep...

Page 329: ...See Figure 4 4 Remove the right drain pan by unscrewing the two screws See Figure 5 5 Remove the three cable straps from the center pillar See Figure 6 6 Remove the right and left fin guards and the center pillar by unscrewing the 18 screws See Figure 7 Figure 6 Front panel Drain pan left Drain pan right Cable tie Two screws Pipe cover Outside temperature sensor wiring Drain pan left Figure 2 Figu...

Page 330: ...leave no space between the rubber bushes and the wires Fix the wires in place to leave no space between the notches on the rubber bushes and the wires Fix the wires in place with cable straps HIGH VOLTAGE WIRE MAIN INV CONNECTION WIRING HIGH VOLTAGE Fix the wires in place with cable straps SENSOR WIRE TH2 TH4 TH5 TH7 TH15 63LS 63HS Fix the wires in place with cable straps SENSOR WIRE LEV WIRE Fix ...

Page 331: ...ge saddle MAIN INV CONNECTION WIRING LOW VOLTAGE Thread the wires through the edge saddle MAIN INV CONNECTION WIRING HIGH VOLTAGE Thread the wires through the edge saddle FAN MOTOR WIRE HIGH VOLTAGE Bundle excess wiring and fix it in place with a cable tie Wrap the cable tie two turns HIGH VOLTAGE WIRE Thread the wire through the rubber bush COMP WIRE HIGH VOLTAGE Thread the wire through the rubbe...

Page 332: ... and the wires Fix the wires in place to leave no space between the notches on the rubber bushes and the wires Fix the wires in place with cable straps HIGH VOLTAGE WIRE Fix the wires in place with cable straps SENSOR WIRE LEV WIRE Cable strap UNUSED LEFT VIEW TOP LEFT VIEW BOTTOM CONTROL BOX CONTROL BOX BOTTOM VIEW CONTROL BOX Fix the wires in place with cable straps FAN MOTOR WIRE HIGH VOLTAGE F...

Page 333: ...1S4a 21S4c SV1a SV2 Fix the wires in place with cable straps SENSOR WIRE TH4 5 7 15 Fix the wires in place with cable straps COMP WIRE HIGH VOLTAGE Fix the wires in place to leave no space between the rubber bushes and the wires Fix the wires in place to leave no space between the notches on the rubber bushes and the wires BOTTOM VIEW CONTROL BOX CONTROL BOX LEFT VIEW Clamp the wires in place COMP...

Page 334: ...1 Remove the top compressor cover by unscrewing the three screws See Figure 1 Remove the compressor cover by unhooking the hooks on the back 2 Remove the front compressor cover by unscrewing the four screws See Figure 2 3 Cut the two cable ties holding TH4 and TH15 and remove the wiring from the rubber bush on the left compressor cover See Figure 3 4 Remove the left compressor cover by unscrewing ...

Page 335: ...the removed pipes for later use 7 Remove the plastic cover and the coil holding the four way valve See Figure 7 Figure 7 Four way valve coil A Four way valve coil B Notes on replacing refrigerant circuit components check valve four way valve solenoid valve and LEV Be sure to perform non oxidized brazing Before heating the pipes wrap the refrigerant circuit components with a wet towel to keep the t...

Page 336: ... the four way valve The replacement parts for this part is included with the replacement kit that contains four way valve 21S4a Replace the old cap with the one included with the four way valve 13A Remove the pipe below four way valve 21S4a and on the back by removing the braze at the two areas on the bottom of the pipe shown in Figure 13 Then remove the braze at the areas on the top of the pipe 1...

Page 337: ...the area indicated in 16A and the areas indicated in Figure 17 Figure 17 Front view 90 Cut the pipe here Severed pipe Pipe diameter φ19 05 ID of the pipe with an extended end φ19 05 Figure 16 Cut the pipe with an expanded end that is included with four way valve 21S4a so that the section of the pipe excluding the extended end will be the same length as the pipe that was removed from the on site pi...

Page 338: ...valve 21S4a to the pipe below four way valve 21S4a and on the front by brazing at the four areas See Figure 19 This step completes the replacement procedure for four way valve 21S4a Re place the solenoid valve and LEV assembly that were removed in step 8 and all the pipe covers that were removed during the maintenance work as they were Figure 18 Reinstall these pipes Re place the rubber spacer Fig...

Page 339: ...rocedure for replacing four way valve 21S4b on the left when seen from the front of the unit Secure sufficient work space before starting maintenance work See 8 13 1 Ensuring Maintenance Space Preparation for the Maintenance of Refrigerant Circuit Parts Remove the rubber spacer Figure 20 Figure 21 Figure 22 Severed pipe Pipe diameter φ12 7 ID of the pipe with an extended end φ12 7 Cut the pipe her...

Page 340: ...lve and LEV assembly that were removed in step 8 and all the pipe covers that were removed during the maintenance work as they were 24B Mount four way valve 21S4b to the pipe below four way valve 21S4b and in the middle A total of five areas require brazing including the area indicated in 23B and the areas indicated in Figure 23 Mount four way valve 21S4b horizontal to four way valve 21S4a as show...

Page 341: ...check valve CV1 located in the back of the four way valve 1 Follow the steps 1 through 9A under item 1 S L module under 8 12 3 Four way Valve and Check Valve Replacement Procedure to Create Access to Check Valve CV1 2 Remove the braze from two areas on check valve CV1 The above step completes the check valve CV1 replacement procedure Re place the solenoid valve LEV assemby and pipe cover that were...

Page 342: ... coil C Figure 2 Figure 3 Explained below is the procedure for replacing four way valve 21S4a in the center when seen from the front of the unit four way valve 21S4b on the right when seen from the front of the unit and four way valve 21S4c on the left when seen from the front of the unit See Figure 1 2 Remove the coil four way valves 21S4a 21S4b and 21S4c and solenoid valve SV2 coil cover and wir...

Page 343: ...rant circuit components with a wet towel to keep the temperature of the components from rising above 120 C After brazing is done check that the brazing is done properly and check for leaks before vacuum drying the pipes Direct the brazing torch flame away from the wiring and sheet metals inside the unit not to damage them Wet felt sheets listed below or its equivalent and place them around the are...

Page 344: ... four way valve 21S4b Figure 8 shows how to position a new four way valve Figure 7 Figure 8 When seen from above four way valve 21S4b is tilted by 20 The coil of four way valve 21S4b is tilted 20 degrees to the opposite direction compared to the other four way valves Replacement procedure for four way valve 21S4a 5A Remove the braze from the area above four way valve 21S4a as shown in Figure 6 Fig...

Page 345: ...ur way valve 21S4c first braze the pipe outside the unit and then install it to the unit A cap for sealing the refrigerant pipe is included with the replacement kit that contains four way valve 21S4c Replace the old cap with the one included with the four way valve Replacement procedure for four way valve 21S4c 10C Install a flame protection plate See Figure 9 Figure 9 Flame protection plate Inclu...

Page 346: ...ft compressor covers by unscrewing the four screws See Figure 4 5 Remove the saddle and the rubber spacers on the compressor by unscrewing the screw See Figure 5 6 Remove the cover of the compressor terminal block box mounting support metal and the mounting plate by unscrewing the two screws See Figure 6 7 Remove thermal insulation 1 and thermal insulation 2 See Figure 7 8 Remove the inverter cool...

Page 347: ... N m Fasten the bolts using a torque wrench or other tool that can apply the specified torque 16 Re place the compressor covers in the reverse order as they were removed Hold the TH15 wiring in place with the bands to keep the wiring from coming in contact with insulation 2 See Figures 3 and 7 Figure 12 Control box Attach the supplied pipe ACC Compressor Fire protection panel Recommended felt soak...

Page 348: ...Filter board Unscrew the four screws indicated with arrows in Figure 4 a Pull the right panel and the top panel forward Lift the back end of the top panel and pull the terminal board and the top panel Noise Filter board together to remove them See Figure 4 b Figure 1 Figure 2 Figure 2 a Figure 3 a Figure 4 a Figure 4 b Figure 3 b Figure 3 c Figure 5 b Figure 5 Figure 5 a CNINV FT P1 FT P2 R1 R5 be...

Page 349: ...efore vacuum drying the pipes Direct the brazing torch flame away from the wiring and sheet metals inside the unit not to damage them Wet felt sheets listed below or its equivalent and place them around the areas to be brazed to protect the heat exchanger pipes and pipe covers from being damaged from the brazing torch flame Recommended felt sheets Spatter felt 50CF 11 5t x 1 m x 1 m by TRUSCO Naka...

Page 350: ...nit Notes on replacing the control box when replacing the refrigerant cooling pipes Be sure to perform non oxidized brazing Before heating the pipes wrap the refrigerant circuit components with a wet towel to keep the temperature of the components from rising above 120 C After brazing is done check that the brazing is done properly and check for leaks before vacuum drying the pipes Direct the braz...

Page 351: ... two rod holders holding the check joints in place using a wrench See Figure 4 4 Remove the drain pan by unscrewing the two screws See Figure 5 5 Clean the drain pan and the drain pan cover See Figure 6 Remove dust and dirt from the drain groove Drain pan cover Drain pan Cable tie Screw Screw Screw Pull out toward the right Check joint Rod holders Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figur...

Page 352: ...d fit it to the drain pan See Figures 9 and 10 4 Thread a cable tie through the rectangle hole on the screwed down drain cover and hold the silicon tube and the defrost pipe together in place See Figure 11 5 Screw down the front panel with eight screws See Figure 12 Drain pan Check joint Rod holders Silicon tube Defrost pipe Defrost pipe Cable tie Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Fig...

Page 353: ...w and pull the drain cover out to the right See Figure 3 4 Remove the two rod holders holding the check joints in place using a wrench See Figure 4 5 Remove the drain pan by unscrewing the two screws See Figure 5 6 Clean the drain pan and the drain pan cover See Figure 6 Remove dust and dirt from the drain groove Front panel Fin guard left Fin guard right Cable tie Screw Pull out toward the right ...

Page 354: ...10 4 Thread a cable tie through the rectangle hole on the screwed down drain cover and hold the silicon tube and the defrost pipe together in place See Figure 11 5 Screw down the fin guards center pillar and front panel with 14 screws See Figure 12 Drain pan Silicon tube Defrost pipe Defrost pipe Cable tie Check joint Rod holders Fin guard left Fin guard right Center pillar Figure 7 Figure 8 Figur...

Page 355: ...wing the two screws See Figure 4 4 Remove the right drain pan by unscrewing the two screws See Figure 5 5 Clean inside the right and left drain pans See Figure 6 Remove dust and dirt from the drain groove Drain pan left Drain pan right Cable tie Two screws Pipe cover Outside temperature sensor wiring Drain pan left Figure 2 Figure 1 Figure 4 Figure 3 Two screws Figure 5 Figure 6 Drain pan left Dra...

Page 356: ...ft drain pan See Figure 9 4 Hold the external temperature sensor wiring to the left drain pan with two cable ties See Figure 10 5 Screw down the front panel See Figure 11 Figure 7 Figure 8 Figure 9 Two screws Two screws Drain pan right Drain pan left Cable tie Outside temperature sensor wiring Drain pan left Front panel Pipe cover Figure 10 Figure 11 Insert the tab on the drain pan into the notch ...

Page 357: ...a cable tie 4 Remove the drain pan by unscrewing the 2 screws See Figure 3 Be sure to remove the two rod holders holding the check joints to the drain pan See Figure 4 5 Remove the top attachment that connects the main control box to the inverter control box by unscrewing the 2 screws See Figure 5 6 Remove the cover from the inverter control box by unscrewing the 3 screws See Figure 5 7 Remove the...

Page 358: ...re 9 12 Disconnect the TH7 sensor holder from the front pillar See Figure 9 Rear 13 Remove the TH7 wiring from the front heat exchanger by cutting the cable tie See Figure 10 Motor ASSY Fan Figure 8 Rear Front pillar TH7 Connector Front pillar Front heat exchanger Main control box Front heat exchanger Fan guard Figure 7 Spacer Spacer Spacer Figure 9 Figure 10 TH7 Cable tie Use the supplied spacers...

Page 359: ...llar by unscrewing the 9 screws on a standard model or 10 screws on a high efficiency model See Figure 12 Front and Left 17 Remove the right front pillar by unscrewing the 5 screws See Figure 12 Front and Right Use the supplied spacers Use the spacers 60 D X 250 W X 60 H when replacing the heat exchangers for the maintenance of the accumulator and the pipes Right frame Front frame Left frame Left ...

Page 360: ...the back of the right rear pillar 3 screws on a standard model or 2 screws on a high efficiency model See Figure 16 Remove the screw holding the pillar to the rear heat exchanger support See Figure 16 Remove the braze from the areas encircled in the figure Remove the braze from the areas encircled in the figure Loosen the screws Unscrew the screws Connection of the pillar to the front heat exchang...

Page 361: ...orm non oxidized brazing After brazing is done check that the brazing is done properly and check for leaks before vacuum drying the pipes Direct the brazing torch flame away from the wiring and sheet metals inside the unit not to damage them Place the wet felt sheets listed below or their equivalents around the areas to be brazed to protect the heat exchanger pipes and pipe covers from being damag...

Page 362: ...is properly placed on the defrost pipe and then fix the drain pan cover in place with a cable tie 6 Remove the drain pan by unscrewing the 2 screws See Figure 3 Be sure to remove the two rod holders holding the check joints to the drain pan See Figure 4 7 Remove the cover from the control box by unscrewing the 5 screws See Figure 5 8 Remove the cable straps holding motor wiring See Figure 6 Drain ...

Page 363: ...Figure 9 13 Disconnect the TH7 sensor holder from the front pillar See Figure 9 Rear 14 Remove the TH7 wiring from the heat exchanger by cutting the cable tie See Figure 10 Use the supplied spacers Use the spacers 60 D x 250 W x 60 H when replacing the heat exchangers for the maintenance of the accumulator and the pipes Motor ASSY Fan Figure 8 Rear Front pillar TH7 Connector Front pillar Control b...

Page 364: ...lar by unscrewing the 9 screws on a standard model or 10 screws on a high efficiency model See Figure 12 Front and Left 18 Remove the right front pillar by unscrewing the 5 screws See Figure 12 Front and Right Use the supplied spacers Use the spacers 60 D X 250 W X 60 H when replacing the heat exchangers for the maintenance of the accumulator and the pipes Right frame Front frame Left frame Left f...

Page 365: ...ency model Remove the braze from the areas encircled in the figure Remove the braze from the areas encircled in the figure Loosen the screws 20 To remove the front heat exchanger loosen the screws on the right side of the right rear pillar 4 screws on a standard model or 3 screws on a high efficiency model See Figure 15 To remove the rear heat exchanger loosen the screws on the back of the right r...

Page 366: ...d to be installed The front and the rear heat exchanger supports are for suppressing vibration during transportation 23 Re place the front and the rear heat exchangers in the reverse order as they were removed Re place the components that were removed as they were Figure 19 Figure 20 Front heat exchanger Rear heat exchanger Front heat exchanger Front heat exchanger support Unscrew the screws Rear ...

Page 367: ...motor wiring from the control box See Figure 5 8 Remove the fan guard by unscrewing the 12 screws See Figure 6 9 Remove the wire from the center frame See Figure 7 10 Remove the motor ASSY by unscrewing the 8 screws using caution not to damage the motor wiring or the fan See Figure 7 Fin guard Center pillar Front panel Figure 2 Figure 3 Pipe cover Drain pan left Drain pan right Center frame Fan Fa...

Page 368: ...frames by unscrewing the 16 screws See Figure 12 To remove the right and left rear heat exchangers remove the top and the rear frames in addition to the front left right and center frames by unscrewing the 21 screws See Figure 12 15 Remove the center front pillar by unscrewing the 4 screws See Figure 13 Remove the braze from the areas encircled in the figure Remove the braze from the areas encircl...

Page 369: ...rd model or 6 screws on a high efficiency model See Figures 16 and 17 Front heat exchanger Unscrew the screws Unscrew the screws Left front pillar Right front pillar Connection of the pillar to the left rear heat exchanger 4 screws on a standard model or 5 screws on a high efficiency model Removing the left rear heat exchanger Figure 15 Removing the right rear heat exchanger Figure 17 Removing the...

Page 370: ... the pipes 18 Re place the front and the rear heat exchangers in the reverse order as they were removed Re place the components except the rear heat exchanger support that were removed as they were Front heat exchanger Left rear heat exchanger Right rear heat exchanger Removing the front heat exchanger Figure 18 Removing the rear heat exchanger Figure 19 0000004986 BOOK 115 ページ２０１９年５月９日木曜日午後６時２...

Page 371: ...ve the right and inside right compressor panels by unscrewing the four screws Applicable only to the S module See Figures 1 and 2 5 Unscrew the four screws from the right accumulator fixing plate See Figures 3 and 5 6 Unscrew the four screws from the rear accumulator fixing plate See Figures 3 and 4 7 Remove the accumulator by unscrewing the four screws at the base legs See Figure 6 Figure 1 Figur...

Page 372: ...a wet towel to keep the temperature of the components from rising above 120 C After brazing is done check that the brazing is done properly and check for leaks before vacuum drying the pipes Direct the brazing torch flame away from the wiring and sheet metals inside the unit not to damage them Wet felt sheets listed below or its equivalent and place them around the areas to be brazed to protect th...

Page 373: ...acer by unscrewing the three screws shown in Figure 8 Either remove or protect the wiring pipe cover and plastic components to keep them from being damaged by the torch flame 4 Remove the sheet metal cable ties and rubber spacers from the accumulator mounting plate by unscrewing the screw See Figure 9 5 Remove the braze at the two areas on the accumulator outlet suction pipe See Figure 10 6 Remove...

Page 374: ...pes on the back of the accumulator See Figure 13 8 For the five pipe piping on the back of the accumulator follow the procedures below Remove the braze at the five areas on the five pipes on the back of the accumulator See Figure 14 Remove the braze at the seven areas that are located on the right side of the five pipes on the back of the accumulator See Figure 15 9 Re place the accumulator in the...

Page 375: ...move all refrigerant from the pipes 2 Remove the front panel 8 screws and the rear panel 7 screws 3 Disconnect all wires connecting the control box to the unit including the wires added on site 4 Pull the control box 5 screws out in the di rection of the arrow 5 Remove the plate heat exchanger set screws 2 in the front and 2 in the back Service panel back Service panel front 2 Control box 4 5 0000...

Page 376: ...ymptoms Operation procedures Illustrations 6 Remove the braze from the two areas indi cated with arrows and remove the two vic taulic joints from the water pipe 7 Pull the plate heat exchanger forward and out 8 Replace the heat exchanger Victaulic joint 6 7 0000004986 BOOK 121 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 377: ...ns 1 Remove all refrigerant from the pipes 2 Remove the front panel 8 screws 3 Remove the saddle by unscrewing the screws 4 Remove the braze from the areas circled in the figure 5 Pull the pipe out in the direction of the ar row 6 Remove the strainer from the pipe and re place it Service panel front 2 3 Strainer Saddle 4 5 5 Strainer 0000004986 BOOK 122 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 378: ...ll refrigerant from the pipes 2 Remove the front panel 8 screws and the rear panel 7 screws 3 Disconnect all wires connecting the control box and the pressure sensor 4 Remove the braze from the areas circled in the figure 5 Replace the pressure sensor and connect it to the control box connector Service panel back Service panel front 2 Pressure sensor refrigerant 4 0000004986 BOOK 123 ページ２０１９年５月９日...

Page 379: ...8 14 4 Check Valve Replacement Procedure Operation procedures Illustrations 1 Remove all refrigerant from the pipes 2 Remove the rear panel 7 screws 3 Remove the braze from the areas circled in the figure 4 Replace the check valve Service panel back 2 Check valve 3 0000004986 BOOK 124 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 380: ...refrigerant from the pipes 2 Remove the front panel 8 screws 3 Remove the pipe cover 4 Disconnect all wires connecting the control box solenoid valve and LEV coil See Steps 3 and 4 for the removal proce dure 5 Remove the braze from the areas circled in the figure 6 Replace the solenoid valve and the LEV coil Service panel front 2 3 Solenoid valve Pipe cover LEV body 5 0000004986 BOOK 125 ページ２０１９年...

Page 381: ... panel 8 screws and the rear panel 7 screws 2 Disconnect the wires connecting the control box and the pump relay connector and ground wire 3 Unclamp the wires 4 Remove the eight bolts from the flanges and pull the pump out in the direction of the arrow The pump must be replaced by two per sons Service panel back Service panel front Pump 1 2 3 4 Bolt 0000004986 BOOK 126 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 382: ...structions BS_08_E chapter 8 127 8 Troubleshooting Based on Observed Symptoms Operation procedures Illustrations 5 Remove the terminal screws and remove the connector 6 Replace the pump 5 0000004986 BOOK 127 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 383: ...8 screws and the rear panel 7 screws 2 Disconnect the wires connecting the control box and all thermistors TH32 and TH35 and TH13 and TH11 are connected to the same connector 3 Install the replacement thermistors as shown in the figure and connect them to the control box connectors Service panel back Service panel front 1 2 TH35 TH13 TH11 TH32 Service panel front 0000004986 BOOK 128 ページ２０１９年５月９日 ...

Page 384: ...anel 8 screws 2 Remove the wires connecting the control box and the solenoid valve coil 3 Remove the screw from the coil cover and remove the coil cover and the coil 4 Install the replacement solenoid valve coil as shown in the figure and connect it to the control box connector Service panel front Solenoid valve coil 1 3 Solenoid valve coil cover Solenoid valve coil 0000004986 BOOK 129 ページ２０１９年５月...

Page 385: ...procedures Illustrations 1 Remove the front panel 8 screws 2 Remove the wires connecting the control box and the LEV coil 3 Turn the LEV coil and pull it up to remove it 4 Install the replacement LEV coil as shown in the figure and connect it to the control box connector Service panel front LEV coil 1 3 LEV coil 0000004986 BOOK 130 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 386: ...ations 1 Remove the front panel 8 screws and the rear panel 7 screws 2 Disconnect the wires connecting the control box and the pressure sensor 3 Remove the flare nuts fixing the pressure sensor with a wrench replace the pressure sensor and connect it to the control box connector Service panel back Service panel front 1 3 Pressure sensor water 0000004986 BOOK 131 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 387: ...alve Replacement Procedure Operation procedures Illustrations 1 Remove the rear panel 7 screws 2 Remove the pipe cover from the pipe with the water purge valve 3 Loosen the flare nuts with a wrench and re place the water purge valve Service panel back 1 Water purge valve Pipe cover 2 3 0000004986 BOOK 132 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 388: ... 12 Safe Valve Replacement Procedure Operation procedures Illustrations 1 Remove the rear panel 7 screws 2 Remove the clip see below and remove the valve assy 3 Remove the tube and the joint 4 Replace the safety valve Service panel back 1 Safe valve Clip Safe valve 2 3 0000004986 BOOK 133 ページ２０１９年５月９日木曜日午後６時２２分 ...

Page 389: ... LED error display becomes lit when the power is turned on with all the connectors on the control board except CNDC disconnected there is a problem with the wiring to those connec tors or with the connectors themselves 3 If nothing appears on the display under item 2 above AND the voltage between pins 1 and 3 of CNDC is within the range between 220 VDC and 380 VDC control board failure is suspecte...

Page 390: ...9 2 1 Preparation 4 9 2 2 Storing Data on a USB Memory Stick 4 9 2 3 Collecting Operation Data 6 9 2 4 Precautions 7 9 3 Software Rewrite Function on the USB 8 9 3 1 Preparation 8 9 3 2 Rewriting Software 8 9 3 3 Precautions 9 9 4 Maintenance LED Display and Troubleshooting 10 9 4 1 Maintenance LED Display Content List 10 9 4 2 Troubleshooting 13 0000005077 BOOK 1 ページ２０１９年５月８日水曜日午後３時１２分 ...

Page 391: ...GB_BS_09_C 0000005077 BOOK 2 ページ２０１９年５月８日水曜日午後３時１２分 ...

Page 392: ... memory in the control board of the outdoor unit OC The data can be transferred and stored in a USB memory stick 2 Software rewrite function The software on outdoor units can be rewritten using a USB memory stick For detailed information about each function refer to Section 9 2 Operation Data Collection and Storage Functions and Sec tion 9 3 Software Rewrite Function on the USB For information reg...

Page 393: ...9_C 9 USB Function 9 1 2 System Structure 1 Control board on the outdoor unit CN601 SWP3 Push switch Function setting LED301 Maintenance LED CNUSB USB memory connector SW4 Dip switch SW6 10 SW7 9 0000005077 BOOK 2 ページ２０１９年５月８日水曜日午後３時１２分 ...

Page 394: ...curity function 2 Portable battery charger Use a portable battery charger that meets the following specifications for rewriting the software USB 2 0 compatible Voltage and amperage rating of 5 V and 2 1 A MAX A LEAD WIRE ASSY USB is required to connect the control board and the portable charger Use a cable that meets the following specifications Type A male Male XA connector for the PCB USB cable ...

Page 395: ...ry stick Data can be stored to a USB memory stick either with the main power to the outdoor unit turned on Method 2 or off Method 1 For safety reasons it is recommended to store the data on a USB memory stick with the main power to the outdoor unit turned off Method 1 If turning off the power is not feasible take appropriate measures to ensure safety Method 1 recommended Storing data on a USB memo...

Page 396: ...ED 301 End on the LED indicates successful completion of the data storage process It takes approximately five minutes for the data storage process to be completed Ending the data storage mode When done storing data disconnect the USB memory stick from the control board Press and hold SWP3 ENTER for approximately 10 seconds until End disappears from the monitoring LED 301 Restart the indoor and out...

Page 397: ... switches on the control board by following the table shown above Switch setting SW6 10 ON SW4 817 2 Press SWP3 ENTER With each switch operation the setting can be alternately switched ON and OFF 3 After conducting step 1 check that the operating condition is stable Data collection start OFF Enabled Data collection end ON Disabled Setting procedure is now complete 3 Settings for error data collect...

Page 398: ...n If an error occurs refer to 9 4 2 Troubleshooting After normal startup set the operation status of the air conditioning units to the original status USB memory sticks may become unusable due to unexpected damage or memory shortage It is recommended to take extra USB memory sticks to the site If only the OS is operated due to problems with the OC collect data also from the OS by following the sam...

Page 399: ...he control board 4 Connect the portable battery charger to the XA connector CN601 for the PCB The power of the control board will turn on Wait for five seconds until the USB memory stick is recognized 5 Make sure the display Pro is shown on the maintenance LED LED301 This shows that Software Rewrite Mode has been started 2 Performing software rewriting 1 Wait for 5 seconds after Pro appeared on th...

Page 400: ...to the LEAD WIRE ASSY USB and then to the control board Make sure the portable battery charger is sufficiently charged Rewrite error may occur if battery charge is insufficient Take care not to forget to remove the USB memory stick in step 3 2 or forget to turn off SW7 9 in step 3 3 9 3 2 Rewriting Software If these precautions are not taken the system may not start normally When rewriting ended u...

Page 401: ... is en abled See Section 9 4 2 Troubleshooting 1 1 and 1 2 2 Storage in progress 0 to 99 is displayed Status of the data storage to the USB memory stick is shown by the progress rate 3 Storage completed END The storage process has been completed successfully 4 Error USB memory side Er01 The storage process cannot be started due to failure of the USB memory stick See Section 9 4 2 Troubleshooting 1...

Page 402: ...collection will be resumed automatically See Sec tion 9 4 2 Troubleshooting 2 1 7 Collection suspended OFF Collection of operation data is suspended 8 Flash memory error F Er Collection of operation data is suspended due to failure in the flash memory used to store opera tion data It may be necessary to change the board See Section 9 4 2 Troubleshooting 2 2 9 Error Err Error was found due to the f...

Page 403: ...e has been completed successfully 13 Error USB memory side Er01 Software rewrite process cannot be started due to failure of the USB memory stick See Section 9 4 2 Troubleshooting 3 4 Er02 Software rewrite was stopped due to failure of the USB memory stick during the software rewrite process See Section 9 4 2 Troubleshooting 3 5 14 Error control board side Er10 Software rewrite was not completed d...

Page 404: ...g the USB memory before the start of data storage data storage has not been com pleted Error Er01 occurs when SWP3 on the control board is pressed to rewrite the software immediately after power is supplied to the USB connected control board When the software rewriting is started before the control board recognizes the USB memory stick Solution Check the connection of the USB memory stick If no pr...

Page 405: ... by following either of the two methods 1 or 2 the control board may be malfunctioning 2 Collecting operation data 1 Maintenance LED displays blinking ON Meaning or Cause Despite data collection function being enabled it is not started yet There may be two causes Firstly the initialization process immediately after the system startup may have inhibited the start of data collection Secondly M NET c...

Page 406: ...d in 1 1 Starting software rewrite mode under Section 9 3 2 Rewriting Software If the problem persists rewrite the software using a ROM writer 4 Maintenance LED displays Er01 Meaning or Cause Because an error occurred in the USB memory stick before the start of software rewrite software rewrite has not been com pleted Error Er01 occurs when SWP3 on the control board is pressed to rewrite the softw...

Page 407: ...lems are found follow the procedure starting with the step explained in 1 Operation procedure 1 Starting software rewrite mode under 9 3 2 Rewriting Software 6 Maintenance LED displays Er10 or Er11 Meaning or Cause Because there was a problem in the control board during the software rewrite process software rewrite has not been com pleted Solution Try rewriting the software again by following the ...

Page 408: ...oor unit 1 10 1 1 How to Read the LED 1 10 1 2 Initial LED Display 2 10 1 3 Clock Memory Function 3 10 2 LED Status Indicators Hydro unit 4 10 2 1 How to Read the LED 4 10 2 2 Initial LED Display 4 10 3 LED Status Indicators Table 5 0000004988 BOOK 1 ページ２０１９年５月９日木曜日午前８時１５分 ...

Page 409: ...GB_BS_10_E 0000004988 BOOK 2 ページ２０１９年５月９日木曜日午前８時１５分 ...

Page 410: ...rature are examples of numerical values and operating conditions and the on off status of solenoid valve are examples of flag display In the example above 1 through 9 are set to ON and 10 is set to OFF 1 Display of numerical values Example When the pressure data sensor reads 18 8kg cm2 Item No 58 The unit of pressure is in kg cm2 Use the following conversion formula to convert the displayed value ...

Page 411: ...ilure between the control board and the trans mission line power supply board or if the circuit board has failed How to convert HP capacity to Model name HP capacity is the capacity of outdoor unit that is shown on LED display at initial setting Please refer to the following table to covert from HP capacity to Model name No Item Display Remarks 1 Software version 0103 Version 1 03 2 Refrigerant ty...

Page 412: ...power is turned off and then on again the count will resume from the time before the power was turned off Thus the time that differs the actual time will be displayed This also applies when a power failure occurs The system controller such as AG 150A adjusts the time once a day When the system controller is connected the time will be automatically updated to the correct current time after the time...

Page 413: ...ill be displayed on the monitor screen Displays No 1 through No 4 in order repeatedly Only item No 1 Software Version appears on the display if there is a wiring failure between the control board and the trans mission line power supply board or if the circuit board has failed LD1 Pump in operation LD2 DIP SW 011 4 ON LD3 DIP SW 011 5 ON LD5 52C LD7 HU LD8 Microcomputer in operation 7SEG LED LD1 LD...

Page 414: ... Special control Retry operation Emergency op eration Communication error 3 minute restart delay mode B 9 1001000000 Communication demand ca pacity 0000 to 9999 B If not demanded controlled appears on the display 10 0101000000 Contact point demand capac ity 0000 to 9999 B If not demanded controlled appears on the display 11 1101000000 External signal Open input contact point Contact point de mand ...

Page 415: ...ostat is on Unlit when thermostat is off Bottom Unit No 9 Unit No 10 Unit No 11 Unit No 12 Unit No 13 Unit No 14 Unit No 15 Unit No 16 25 1001100000 Top Unit No 17 Unit No 18 Unit No 19 Unit No 20 Unit No 21 Unit No 22 Unit No 23 Unit No 24 Bottom Unit No 25 Unit No 26 Unit No 27 Unit No 28 Unit No 29 Unit No 30 Unit No 31 Unit No 32 26 0101100000 Top Unit No 33 Unit No 34 Unit No 35 Unit No 36 Un...

Page 416: ...999 A 95 1111101000 FAN1 0000 to 9999 A Fan output 96 0000011000 Fan inverter output rpm FAN1 0000 to 9999 A rpm 97 1000011000 FAN2 0000 to 9999 A Fan output 98 0100011000 Fan inverter output rpm FAN2 0000 to 9999 A rpm 103 1110011000 LEV1 0000 to 9999 A Outdoor LEV opening Fully open 480 104 0001011000 LEV2a 0000 to 9999 A Outdoor LEV opening Fully open 3000 105 1001011000 LEV4 0000 to 9999 A Out...

Page 417: ...of inverter 0001 0120 A 184 0001110100 Error history 4 0000 to 9999 B 185 1001110100 Error details of inverter Error details of inverter 0001 0120 A 186 0101110100 Error history 5 0000 to 9999 B 187 1101110100 Error details of inverter Error details of inverter 0001 0120 A 188 0011110100 Error history 6 0000 to 9999 B 189 1011110100 Error details of inverter Error details of inverter 0001 0120 A 1...

Page 418: ...9 9 to 999 9 A 218 0101101100 TH7 99 9 to 999 9 A 219 1101101100 TH6 99 9 to 999 9 A 220 0011101100 TH2 99 9 to 999 9 A 221 1011101100 TH5 99 9 to 999 9 A 227 1100011100 THHS1 99 9 to 999 9 A The unit is C 229 1010011100 High pressure sensor data 99 9 to 999 9 A The unit is kgf cm 2 230 0110011100 Low pressure sensor data 99 9 to 999 9 A 233 1001011100 TH15 99 9 to 999 9 A The unit is C 249 100111...

Page 419: ...999 A Outdoor LEV opening Fully open 480 288 0000010010 COMP Operation time Upper 4 digits 0000 to 9999 A The unit is h 289 1000010010 COMP Operation time Lower 4 digits 0000 to 9999 A 294 0110010010 COMP number of start stop events Upper 4 digits 0000 to 9999 A Count up at start up The unit is Time 295 1110010010 COMP number of start stop events Lower 4 digits 0000 to 9999 A 300 0011010010 Integr...

Page 420: ... OC 301 1011010010 Power supply unit OC OS 1 OS 2 Address B 302 0111010010 Start up unit OC OS 1 OS 2 Address B 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant system is displayed 2 This model of outdoor unit is not used in combination and there is no OS in the system The status of the OC will be shown 0000004988 BOOK 11 ページ２０１９年５月９日木曜日午前...

Page 421: ...dress capacity code 0000 to 9999 0000 to 9999 371 1100111010 IC21 Address capacity code 0000 to 9999 0000 to 9999 372 0010111010 IC22 Address capacity code 0000 to 9999 0000 to 9999 373 1010111010 IC23 Address capacity code 0000 to 9999 0000 to 9999 374 0110111010 IC24 Address capacity code 0000 to 9999 0000 to 9999 375 1110111010 IC25 Address capacity code 0000 to 9999 0000 to 9999 376 0001111010...

Page 422: ...C13 Suction temperature 99 9 to 999 9 421 1010010110 IC14 Suction temperature 99 9 to 999 9 422 0110010110 IC15 Suction temperature 99 9 to 999 9 423 1110010110 IC16 Suction temperature 99 9 to 999 9 424 0001010110 IC17 Suction temperature 99 9 to 999 9 425 1001010110 IC18 Suction temperature 99 9 to 999 9 426 0101010110 IC19 Suction temperature 99 9 to 999 9 427 1101010110 IC20 Suction temperatur...

Page 423: ...erature 99 9 to 999 9 466 0100101110 IC9 Water pipe inlet temperature 99 9 to 999 9 467 1100101110 IC10 Water pipe inlet temperature 99 9 to 999 9 468 0010101110 IC11 Water pipe inlet temperature 99 9 to 999 9 469 1010101110 IC12 Water pipe inlet temperature 99 9 to 999 9 470 0110101110 IC13 Water pipe inlet temperature 99 9 to 999 9 471 1110101110 IC14 Water pipe inlet temperature 99 9 to 999 9 4...

Page 424: ... temperature 99 9 to 999 9 498 0100111110 IC41 Water pipe inlet temperature 99 9 to 999 9 499 1100111110 IC42 Water pipe inlet temperature 99 9 to 999 9 500 0010111110 IC43 Water pipe inlet temperature 99 9 to 999 9 501 1010111110 IC44 Water pipe inlet temperature 99 9 to 999 9 502 0110111110 IC45 Water pipe inlet temperature 99 9 to 999 9 503 1110111110 IC46 Water pipe inlet temperature 99 9 to 9...

Page 425: ...er of connected units B 514 0100000001 RC address Count up display of number of connected units B 517 1010000001 Version Capacity S W version Refrigerant type Model and capacity Communication address A 518 0110000001 OC address OC address display 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant system is displayed 2 This model of outdoor unit...

Page 426: ...pe outlet temperature 99 9 to 999 9 543 1111100001 IC21 Water pipe outlet temperature 99 9 to 999 9 544 0000010001 IC22 Water pipe outlet temperature 99 9 to 999 9 545 1000010001 IC23 Water pipe outlet temperature 99 9 to 999 9 546 0100010001 IC24 Water pipe outlet temperature 99 9 to 999 9 547 1100010001 IC25 Water pipe outlet temperature 99 9 to 999 9 548 0010010001 IC26 Water pipe outlet temper...

Page 427: ...o 999 9 584 0001001001 IC12SH 99 9 to 999 9 585 1001001001 IC13SH 99 9 to 999 9 586 0101001001 IC14SH 99 9 to 999 9 587 1101001001 IC15SH 99 9 to 999 9 588 0011001001 IC16SH 99 9 to 999 9 589 1011001001 IC17SH 99 9 to 999 9 590 0111001001 IC18SH 99 9 to 999 9 591 1111001001 IC19SH 99 9 to 999 9 592 0000101001 IC20SH 99 9 to 999 9 593 1000101001 IC21SH 99 9 to 999 9 594 0100101001 IC22SH 99 9 to 99...

Page 428: ...111001 IC8SC 99 9 to 999 9 631 1110111001 IC9SC 99 9 to 999 9 632 0001111001 IC10SC 99 9 to 999 9 633 1001111001 IC11SC 99 9 to 999 9 634 0101111001 IC12SC 99 9 to 999 9 635 1101111001 IC13SC 99 9 to 999 9 636 0011111001 IC14SC 99 9 to 999 9 637 1011111001 IC15SC 99 9 to 999 9 638 0111111001 IC16SC 99 9 to 999 9 639 1111111001 IC17SC 99 9 to 999 9 640 0000000101 IC18SC 99 9 to 999 9 641 1000000101...

Page 429: ...1 IC41SC 99 9 to 999 9 664 0001100101 IC42SC 99 9 to 999 9 665 1001100101 IC43SC 99 9 to 999 9 666 0101100101 IC44SC 99 9 to 999 9 667 1101100101 IC45SC 99 9 to 999 9 668 0011100101 IC46SC 99 9 to 999 9 669 1011100101 IC47SC 99 9 to 999 9 670 0111100101 IC48SC 99 9 to 999 9 671 1111100101 IC49SC 99 9 to 999 9 672 0000010101 IC50SC 99 9 to 999 9 Data on indoor unit system No SW4 When SW6 10 is set ...

Page 430: ...our minute 699 1101110101 Time of error detection 5 2 00 00 to 99 12 1 to 31 Year and month and date alter nate display 700 0011110101 Time of error detection 6 00 00 to 23 59 Hour minute 701 1011110101 Time of error detection 6 2 00 00 to 99 12 1 to 31 Year and month and date alter nate display 702 0111110101 Time of error detection 7 00 00 to 23 59 A Hour minute 703 1111110101 Time of error dete...

Page 431: ...mode 778 0101000011 IC15 Operation mode 779 1101000011 IC16 Operation mode 780 0011000011 IC17 Operation mode 781 1011000011 IC18 Operation mode 782 0111000011 IC19 Operation mode 783 1111000011 IC20 Operation mode 784 0000100011 IC21 Operation mode 785 1000100011 IC22 Operation mode 786 0100100011 IC23 Operation mode 787 1100100011 IC24 Operation mode 788 0010100011 IC25 Operation mode 789 101010...

Page 432: ...011 IC7 filter 0000 to 9999 821 1010110011 IC8 filter 0000 to 9999 822 0110110011 IC9 filter 0000 to 9999 823 1110110011 IC10 filter 0000 to 9999 824 0001110011 IC11 filter 0000 to 9999 825 1001110011 IC12 filter 0000 to 9999 826 0101110011 IC13 filter 0000 to 9999 827 1101110011 IC14 filter 0000 to 9999 828 0011110011 IC15 filter 0000 to 9999 829 1011110011 IC16 filter 0000 to 9999 830 0111110011...

Page 433: ... filter 0000 to 9999 854 0110101011 IC41 filter 0000 to 9999 855 1110101011 IC42 filter 0000 to 9999 856 0001101011 IC43 filter 0000 to 9999 857 1001101011 IC44 filter 0000 to 9999 858 0101101011 IC45 filter 0000 to 9999 859 1101101011 IC46 filter 0000 to 9999 860 0011101011 IC47 filter 0000 to 9999 861 1011101011 IC48 filter 0000 to 9999 862 0111101011 IC49 filter 0000 to 9999 863 1111101011 IC50...

Page 434: ... unit is deg 880 0000111011 Control board Reset counter 0 to 254 A The unit is time 881 1000111011 INV board Reset counter 0 to 254 A 884 0010111011 Fan board address 5 reset counter 0 to 254 A The unit is time 885 1010111011 Fan board address 6 reset counter 0 to 254 A 980 0010101111 M NET processor S W version 0 00 to 99 99 A 1 A The condition of either OC or OS is displayed individually B The c...

Page 435: ... 10 3 LED Status Indicators Table 10 LED Status Indicators 26 chapter 10 BS_10_E 0000004988 BOOK 26 ページ２０１９年５月９日木曜日午前８時１５分 ...

Page 436: ......

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Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

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