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Mitsubishi Electric City Multi PUHY-HP144TSHMU-A, Service Handbook

The Mitsubishi Electric City Multi PUHY-HP144TSHMU-A is a top-of-the-line air conditioning system designed for commercial use. For easy and hassle-free installation, make sure to download the free Installation Manual from our website. Simply visit manualshive.com to access this comprehensive manual and ensure a smooth setup process.

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[

IX

 Troubleshooting ]

- 150 -

HWE0716A

GB

1. Error 

Code

Address overlap

2.  Error definition and error detection method

An error in which signals from more than one indoor units with the same address are received

The address and attribute that appear on the remote controller indicate the controller that detected the error. 

3.  Cause, check method and remedy

6600

Cause

Check method and remedy

Two or more of the following have the same address: 
Outdoor units, indoor units, LOSSNAY units, control-
lers such as M-NET 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, and LOSS-
NAY units, keep them all turned off for at least five 
minutes, and turn them back on. 

Summary of Contents for City Multi PUHY-HP144TSHMU-A

Page 1: ......

Page 2: ...or fixed cables may produce heat and start a fire Take appropriate safety measures against strong winds and earthquakes to prevent the unit from falling If the unit is not installed properly the unit may fall and cause serious injury to the person or damage to the unit Do not make any modifications or alterations to the unit Consult your dealer for repair Improper repair may result in water leakag...

Page 3: ...leakage electric shock and or fire After completing the service work check for a gas leak If leaked refrigerant is exposed to a heat source such as a fan heater stove or electric grill poisonous gases may be produced Do not try to defeat the safety features of the unit Forced operation of the pressure switch or the temperature switch by defeating the safety features of these devices or the use of ...

Page 4: ...gaseous refrigerant is charged into the system the com position of the refrigerant in the cylinder will change and may result in performance loss Use a vacuum pump with a reverse flow check valve If a vacuum pump that is not equipped with a reverse flow check valve is used the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerating machine oil to deteriorate Prepare tools f...

Page 5: ...quently Doing so may lead to a re markable drop in performance electric shock malfunc tions smoke and or fire The presence of organic solvents or corrosive gas i e ammonia sulfur compounds and acid may cause gas leakage or water leakage When installing the unit in a hospital take appropriate measures to reduce noise interference High frequency medical equipment may interfere with the normal operat...

Page 6: ...ires or copper wires may result in malfunctions smoke and or fire Do not spray water on the air conditioner or immerse the air conditioner in water Otherwise electric shock and or fire may result When handling units always wear protective gloves to protect your hands from metal parts and high tempera ture parts Periodically check the installation base for damage If the unit is left on a damaged pl...

Page 7: ...of the unit such as pipes and compressor may be either very cold or hot depending on the state of the refrigerant in the unit at the time To reduce the risk of frost bites and burns do not touch these parts with bare hands Do not operate the unit without panels and safety guards Rotating high temperature or high voltage parts on the unit pose a risk of burns and or electric shock Do not turn off t...

Page 8: ...d ME Remote Controllers 55 2 Group Settings and Interlock Settings via the ME Remote Controller 56 3 Interlock Settings via the MA Remote Controller 60 4 Using the built in Temperature Sensor on the Remote Controller 61 V Electrical Wiring Diagram 1 Electrical Wiring Diagram of the Outdoor Unit 65 2 Electrical Wiring Diagram of Transmission Booster 66 VI Refrigerant Circuit 1 Refrigerant Circuit D...

Page 9: ...HWE0716A GB ...

Page 10: ...Materials 5 4 Storage of Piping 7 5 Pipe Processing 7 6 Brazing 8 7 Air Tightness Test 9 8 Vacuum Drying Evacuation 10 9 Refrigerant Charging 11 10 Remedies to be taken in case of a Refrigerant Leak 11 11 Characteristics of the Conventional and the New Refrigerants 12 12 Notes on Refrigerating Machine Oil 13 ...

Page 11: ... 2 ...

Page 12: ...ools 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 refrigerant pipes may cause the refrigerant...

Page 13: ...ing The refrigerant type is indicated The cylinder is pink Charging Port on the Refrigerant Cylinder Refrigerant charging The charge port diameter is larger than that of the current port Flare Nut Connection of the unit with the pipes Use Type 2 Flare nuts Tools Materials Use Notes Gas Leak Detector Gas leak detection The ones for use with HFC refrigerant may be used Vacuum Pump Vacuum drying May ...

Page 14: ...stem that uses R410A use pipes that are made with 1 2H material Drawn unless the pipe diameter is at least ø19 05 3 4 and the radial thickness is at least 1 2t 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 O material Annealed Soft copper pipes annealed copper pipes They can easily be bent with...

Page 15: ...For margin adjustment a copper pipe gauge is necessary 6 Flare nut The flare nut type has been changed to increase the strength The size of some of the flare nuts have also been changed 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 Flare processing dimensions mm in Pipe size mm in A dimension ...

Page 16: ...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 it will cause the oil to deteriorate and cause a compressor failure 5 Pipe Processing Use a small amount of ester oil eth...

Page 17: ...pper 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 Residual flux in the refrigera...

Page 18: ...ount Refrigerant R410A must be charged in its liquid state vs gaseous state 2 Reasons Oxygen if used for an air tightness test poses a risk of explosion Only use nitrogen to check air tightness Refrigerant R410A must be charged in its liquid state If gaseous refrigerant in the cylinder is drawn out first the composition of the remaining refrigerant in the cylinder will change and become unsuitable...

Page 19: ...orough 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 o...

Page 20: ...ge and be come unsuitable for use 2 Notes When using a cylinder with a siphon refrigerant is charged in the liquid state without the need for turning it upside down Check the type of the cylinder on the label before use 10 Remedies to be taken in case of a Refrigerant Leak If the refrigerant leaks out it may be replenished The entire refrigerant does not need to be replaced Charge refrigerant in t...

Page 21: ...laced 3 Pressure characteristics The pressure in the system using R410A is 1 6 times as great as that in the system using R22 New Refrigerant HFC type Conventional Refriger ant HCFC type R410A R407C R22 R32 R125 R32 R125 R134a R22 Composition wt 50 50 23 25 52 100 Type of Refrigerant Pseudo azeotropic Refrigerant Non azeotropic Refrigerant Single Refrigerant Chloride Not included Not included Incl...

Page 22: ...nants 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 performance Compressor overheat Motor insulation failure Burnt motor Coppering of the orbiting scroll Lock Burn in on ...

Page 23: ... 14 ...

Page 24: ...ress Settings 19 4 Sample System Connection 25 5 An Example of a System to which an MA Remote Controller is connected 26 6 An Example of a System to which an M NET Remote Controller is connected 36 7 An Example of a System to which both MA Remote Controller and M NET Remote Controller are connected 38 8 Restrictions on Pipe Length 40 ...

Page 25: ... 16 ...

Page 26: ...ts 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 Outdoor units Composing units Maximum total capacity of...

Page 27: ... of a System to which both MA Remote Controller and M NET Remote Controller are connected before performing wiring work Types and maximum allowable length of cables Control lines are categorized 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 ...

Page 28: ...ed to the indoor outdoor transmission line 2 The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity from large to small if two or more units have the same capacity in the order of address from small to large 3 Turn off the power to all the outdoor units in the same refrigerant circuit MA remote controller 1 M NET remote controller 2 Cab...

Page 29: ...ign an arbitrary but unique address to each of these units after assigning an address to all indoor units 00 M NET remote controller 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 requi...

Page 30: ...n off by the plug individually All the units in the same refrigerant cir cuits will be turned on or off by the plug 4 Requires that the dipswitch settings for all the units in the group be made 5 To control the external input to and output from the air conditioners with the PLC software for general equipment via the G B 50A set SW1 9 and SW1 10 to ON With these settings made the power start stop f...

Page 31: ...ut to the outdoor unit It can be used as the DEMAND control device for each system DEMAND level CN3D 2 2 For details refer to 1 through 4 shown below Adapter for external input PAC SC36NA E Performs a low level noise operation of the outdoor unit by an ex ternal input to the outdoor unit It can be used as the silent operation device for each refrigerant system Low noise mode level 3 4 3 Low noise ...

Page 32: ...y Preparations in the field OFF Cooling ON Heating Normal Y OFF ON X Contact rating voltage DC15V Contact rating current 0 1A Minimum applicable load 1mA at DC X Cooling Heating Y Validity Invalidity of X X Y Relay CN3N X Y Relay circuit Adapter 2 Outdoor unit control board Maximum cable length is 10m 1 2 3 4 CN3D 2 Optional part PAC SC36NA E or field supply X Low noise mode X Low noise mode Y Com...

Page 33: ...the outdoor unit whose SW4 4 is set to ON CN3D 1 3P Compressor ON OFF 1 Open Compressor ON Short circuit Compressor OFF CN3D 1 2P Low noise mode 2 Open OFF Short circuit ON CN3D 1 2P CN3D 1 3P Open Short circuit Open 100 No DEMAND 75 Short circuit 0 Compressor OFF 50 8 levels of on DEMAND No 2 CN3D 1 2P Open Short circuit No 1 CN3D 1 2P 1 3P Open Short circuit Open Short circuit Open Open 100 50 8...

Page 34: ... with one out door unit NO Manual address setup Connection of multiple LOSS NAY units 3 Grouping of units in a system with multiple outdoor units NO Manual address setup 4 System with one out door unit With connection to transmission line for centralized control Manual address setup 5 System with one out door unit With connection to indoor outdoor transmission line Manual address setup System conf...

Page 35: ... 5 2 An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected page 28 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 required 3 MA remote controller wiring Maximum overall line length 0 3 to 1 25m...

Page 36: ...and then connect terminals 1 and 2 on the terminal block TB15 on the in door unit on one end to the terminal block on the MA re mote controller Non polarized two wire When performing 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...

Page 37: ...ndoor units 3 Maximum allowable length 1 Indoor outdoor transmission line Same as 5 1 2 Transmission line for centralized control No connection is required 3 MA remote controller wiring Same as 5 1 L2 TB3 51 52 TB7 S TB3 TB7 S IC TB5 S TB15 1 2 01 IC TB5 S TB15 1 2 02 A B MA A B MA LC TB5 S 05 IC TB5 S 1 2 TB15 IC TB5 S TB15 1 2 04 03 LC TB5 S 06 A B MA Group Group Group M1M2 M1M2 M1M2 M1M2 M1M2 M...

Page 38: ...C and OS Proce dures Unit or controller Address setting range Setting method Notes Factory setting 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 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 numbe...

Page 39: ...utdoor transmission line Maximum distance 1 25mm2 AWG16 or larger L11 L12 200m 656ft L21 L22 200m 656ft 2 Transmission line for centralized control Maximum line distance via outdoor unit 1 25mm2 AWG16 or larger L12 L31 L22 500m 1640ft L11 L31 L21 500m 1640ft 3 MA remote controller wiring Same as 5 1 IC TB5 S TB15 1 2 01 IC TB5 S TB15 1 2 03 A B MA A B MA LC TB5 S 07 IC TB5 S 1 2 TB15 IC TB5 S TB15...

Page 40: ...nected to the sys tem Same as 5 1 Group operation of indoor units Same as 5 2 4 LOSSNAY connection Same as 5 2 5 Switch setting Address setting is required as follows 5 Address setting method The outdoor units in the same refrigerant circuit are automatically designated as OC and OS Proce dures Unit or controller Address setting range Setting method Notes Factory setting 1 Indoor unit Main unit IC...

Page 41: ...factory setting 3 Maximum allowable length 1 Indoor outdoor transmission line Same as 5 3 2 Transmission line for centralized control Maximum line distance via outdoor unit 1 25mm2 AWG16 or larger L32 L31 L12 L11 500m 1640ft L32 L22 L21 500m 1640ft L12 L11 L31 L22 L21 500m 1640ft 3 MA remote controller wiring Same as 5 1 IC TB5 S TB15 1 2 01 IC TB5 S TB15 1 2 02 A B MA A B MA LC TB5 S 07 IC TB5 S ...

Page 42: ...lock for indoor outdoor transmission line TB5 on LOSSNAY LC Non polarized 2 core cable 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 or the LM adapter alone is connected 5 Switch setting ...

Page 43: ...ore indoor units of 72 model or above are con nected there may be cases in which the system control ler cannot be connected to the indoor outdoor transmission line 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 Maximum line distance via outdoor un...

Page 44: ...o the sys tem Same as 5 1 Group operation of indoor units Same as 5 1 4 LOSSNAY connection Connect terminals M1 and M2 on the terminal block TB5 on the indoor units IC to the appropriate termi nals on the terminal block for indoor outdoor transmis sion line TB5 on LOSSNAY LC Non polarized 2 core cable Indoor units must be interlocked with the LOSSNAY unit using the system controller Refer to the o...

Page 45: ...oller 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 diameter of 1 25mm2 AWG16 The section of the cable that exceeds 10m 32ft must be included in the maximum indoor outdoor transmission line distance described in 1 When connected to the terminal block on the Simple re mote controller use ca...

Page 46: ...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 unit address 2 main unit address 3 etc 2 LOSSNAY ...

Page 47: ...is required in a system to which more than 16 indoor including one or more indoor units of the 72 model or above are connected 10 When a power supply unit is connected to the transmis sion 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 5 3 2 Transmission line for centralized contro...

Page 48: ... same group 1 Main unit address 1 main unit address 2 main unit address 3 etc MA re mote con troller Main re mote con troller MA No settings required Main Sub remote controller MA Sub remote controller Settings to be made accord ing to the remote controller function selection 2 Opera tion withthe M NET remote control ler In door unit Main unit IC 01 to 50 Assign the smallest ad dress to the main u...

Page 49: ...alent length 175 574 or less Total pipe length from the first branch to the far thest indoor unit B C c or D f 40 131 or less Height difference Between indoor and outdoor units Outdoor unit above in door unit H 50 164 or less Outdoor unit below in door unit H 40 131 or less Between indoor units h 15 49 or less L B e h f 6 1 a c b 3 2 5 A D C d 4 H H Branch joint Indoor Indoor Indoor Indoor Indoor ...

Page 50: ...h2 0 1 0 3 or less Indoor Indoor Indoor Indoor Indoor Indoor Indoor Indoor C L H a h1 h2 b 2 1 c 3 d 4 e 5 f 6 g 7 i 8 C D E F G I J B A First branch Note To downstream units Note Total sum of downstream unit model numbers in the table is the sum of the model numbers of the units after point E in the figure Note1 Install the pipe that connects the branch pipe and the outdoor units in the way that ...

Page 51: ...pipe size mm inch 72 model ø12 7 1 2 ø19 05 3 4 96 model ø12 7 1 2 ø22 2 7 8 144 model ø15 88 5 8 ø28 58 1 1 8 192 model ø15 88 5 8 ø28 58 1 1 8 model Pipe diameter mm inch 06 18 models Liquid pipe ø6 35 1 4 Gas pipe ø12 7 1 2 24 54 models Liquid pipe ø9 52 3 8 Gas pipe ø15 88 5 8 72 model Liquid pipe ø9 52 3 8 Gas pipe ø19 05 3 4 96 model Liquid pipe ø9 52 3 8 Gas pipe ø22 2 7 8 Total capacity of...

Page 52: ... 43 HWE0716A GB III Outdoor Unit Components 1 Outdoor Unit Components and Refrigerant Circuit 45 2 Control Box of the Outdoor Unit 47 3 Outdoor Unit Circuit Board 48 ...

Page 53: ... 44 ...

Page 54: ...Components 45 HWE0716A GB III Outdoor Unit Components 1 Outdoor Unit Components and Refrigerant Circuit 1 PUHY HP72 HP96THMU A 1 Front view of a outdoor unit Fan Control Box Fan guard Fin guard Front panel Heat exchanger ...

Page 55: ...EV2a 2b High pressure sensor 63HS1 High pressure switch 63H1 Accumulator Solenoid valve SV9 Solenoid valve SV1a Linear Expansion Valve LEV4 Solenoid valve SV6 Fusible plug High pressure check joint 4 way valve 21S4a Low pressure check joint Linear Expansion Valve LEV1 Subcool coil Liquid side valve Gas side valve Oil separator Compressor Compressor cover Solenoid valve SV2 ...

Page 56: ...o its internal components 2 Faston terminals have a locking function Make sure the cable heads are securely locked in place Press the tab on the ter minals to remove them Diode stack IPM Control board DC reactor DCL Current sensor ACCT3 Current sensor ACCT2 Current sensor DCCT1 Current sensor ACCT1 Noise filter Note 1 Ground terminal Smoothing capacitor C1 INV board Fan board Terminal block for tr...

Page 57: ...IT Output 12VDC GND Output 5VDC Power supply detection input Power supply ON OFF signal output CNS2 Transmission line input output for centralized control system 30VDC CN41 Power supply for centralized control OFF CN40 Power supply for centralized control ON CN102 ޓޓޓ ޓޓޓ Indoor outdoor transmission line input output 30VDC Power supply input for centralized control system 30VDC External signal inp...

Page 58: ...tem CNIT Input 12VDC GND Input 5VDC Power supply detection output Power supply ON OFF signal input LED1 Power supply for indoor transmission line TP1 2 Check pins for indoor outdoor transmission line TB7 Terminal block for transmission line for centralized control TB3 Indoor outdoor transmission block Ground terminal for transmission line Grounding Grounding CN04 Bus voltage output P N CN03 Bus vo...

Page 59: ...eration SW1 ON No load operation setting OFF Normal operation setting Fixed to OFF CN5V GND Output 5VDC CN2 Serial communication CN4 GND Fan board Serial communication LED3 Lit while charging CNFG Functional earth F02 Fuse 250VAC 3 15A CNDC3 BUS voltage output P N CNDC2 BUS voltage input P N CNDC1 BUS voltage output P N Power supply signal output for IPM drive IPM N BUS voltage input output N IPM ...

Page 60: ...put GND Control board Serial communication signal output CN22 GND INV board Input 5VDC Serial communication signal input GND INV board Input 17VDC CN21 Serial communication signal output GND INV board Input 17VDC THBOX Thermistor Control box internal temperature detection LED1 Inverter in normal operation LED2 Inverter error DIP IPM Rear CNINV Inverter output W V U R630 Overcurrent detection resis...

Page 61: ...rent prevention resistance TB42 Bus voltage output N TB31 Bus voltage output P CN03 72C drive input Electromagnetic relay 72C Diode stack rectified voltage input Diode stack output Output Diode stack input TB23 L3 TB22 L2 TB21 L1 CN01 Input L1 L2 L3 F2 Fuse 250VAC 6 3A F1 Fuse 250VAC 6 3A CN02 Output R S ...

Page 62: ...s and Specifications of MA and ME Remote Controllers 55 2 Group Settings and Interlock Settings via the ME Remote Controller 56 3 Interlock Settings via the MA Remote Controller 60 4 Using the built in Temperature Sensor on the Remote Controller 61 ...

Page 63: ... 54 ...

Page 64: ...chain the indoor units using non polar ized 2 core cables Non polarized 2 core cable Remote controller connection Connectable to any indoor unit in the group Connectable anywhere on the indoor out door transmission line Interlock with the ventilation unit Each indoor unit can individually be in terlocked with a ventilation unit Set up via remote controller in the group Each indoor unit can individ...

Page 65: ...tion of registration Unit type Indoor unit in this case blinks to indicate a registration error Indicates that selected address does not have a corresponding unit 4 To register the addresses for multiple indoor units repeat steps and above 3 4 To search for an address go to section 2 Address Search To next page To search for an address go to section 2 Address Search Bring up the Interlock Setting ...

Page 66: ...NAY and indoor unit that is interlocked with it will be displayed alternately LOSSNAY can be searched in the same manner by bringing up the LOSSNAY address in the Interlocked unit address display window B Interlock setting search After performing step proceed as follows Bring up the address of the indoor unit to be searched on the display Select the address of the indoor unit to be searched by pre...

Page 67: ...temperature range setting on the simultaneous cooling heating type units that supports the automatic operation mode to save on energy consumption enable the Skip Auto Mode setting to make the automatic operation mode unselectable If the automatic operation mode is selected the energy saving function may not work properly When connected to the air conditioning units that do not support the automati...

Page 68: ...selection mode When set to OFF the automatic operation mode is not available for selection in the function selection mode and an automatic operation cannot be performed The automatic operation mode is skipped in the function selection mode sequence The left figure shows the display that appears when the current temperature range setting is between 19 C 67 F and 30 C 87 F in the Cool Dry mode and t...

Page 69: ...d The registered indoor unit address and IC and the interlocked LOSSNAY address and LC will appear alternately Registration error If the registration fails the indoor unit address and the LOSSNAY address will be displayed alternately Registration cannot be completed The selected unit address does not have a corresponding indoor unit or a LOSSNAY unit Registration cannot be completed Another LOSSNA...

Page 70: ...o search for the address of the LOSSNAY unit that is interlocked with the selected indoor unit Search completed With a LOSSNAY connection The indoor unit address and IC and the interlocked LOSSNAY address and LC will appear alternately Take the following steps to delete the interlock setting between a LOSSNAY unit and the interlocked indoor unit from the remote controller that is connected to the ...

Page 71: ... 62 ...

Page 72: ... 63 HWE0716A GB V Electrical Wiring Diagram 1 Electrical Wiring Diagram of the Outdoor Unit 65 2 Electrical Wiring Diagram of Transmission Booster 66 ...

Page 73: ... 64 ...

Page 74: ... TB23 U CX1 1 F3 AC250V 6 3A T CNDC2 1 5 INV Board SC P1 CN02 Z5 Noise Filter TB42 3 CNCT 3 1 R2 R1 DCL 72C red Diode Stack U 4 U CX3 ACCT3 CNTYP 1 6 3 CN502 CN505 black LED1 Power failure detection circuit CN504 green PCB power supply circuit 2 CN503 blue 3 3 CNDC pink X72 5 X04 X03 1 1 CNT02 X02 1 1 black CNIPM M1 W F02 AC250V 3 15A T ACCT1 V C008 CNDC1 N P C007 U white 1 1 TB3 red V IPM power s...

Page 75: ...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 transmission line ...

Page 76: ... 67 HWE0716A GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 69 2 Principal Parts and Functions 70 ...

Page 77: ... 68 ...

Page 78: ...gerant Circuit 1 Refrigerant Circuit Diagram 1 Outdoor unit 1 PUHY HP72 HP96 models Fusible plug SCC LEV1 ST1 ST2 BV2 O S CP1 SV1a SV2 ACC COMP 63H1 21S4a 63LS ST3 ST6 CJ1 63HS1 CJ2 ST7 TH2 TH3 TH4 TH7 HEX TH6 BV1 63HS2 LEV4 SV6 LEV2a LEV2b SV9 CV1 ...

Page 79: ...ate pres sure sensor 63HS2 Detects intermediate pressure dur ing heating operation and controls LEV2a and 2b Low pressure sensor 63LS 1 Detects low pressure 2 Provides low pressure protec tion Pressure switch 63H1 1 Detects high pressure 2 Provides high pressure protec tion 4 15MPa 601psi OFF set ting Pressure 0 4 15 MPa 601psi Vout 0 5 3 5V 0 071V 0 098 MPa 14psi Pressure MPa 1 38 x Vout V 0 69 P...

Page 80: ... 2 Controls defrosting during heating operation 3 Detects subcool at the heat ex changer outlet and controls LEV1 based on HPS data and TH3 data TH7 Outdoor temperature 1 Detects outdoor air tempera ture 2 Controls fan operation TH5 LEV2a and LEV2b are controlled based on the 63LS and TH5 values TH6 Controls LEV1 based on TH2 TH3 and TH6 data THHS Inverter heat sink temperature Controls inverter c...

Page 81: ... valve LEV1 SC control Adjusts the amount of bypass flow from the liquid pipe on the outdoor unit during cooling DC12V Opening of a valve driven by a stepping motor 0 480 puls es direct driven type Same as in door LEV Theresistance value differs from that of the indoor LEV Refer to the section LEV Troubleshooti ng page 192 LEV2a LEV2b Refrigerant flow adjust ment Adjusts refrigerant flow during he...

Page 82: ...Continuity between yellow brown and blue Thermis tor TH1 Suction air temperature Indoor unit control Thermo 0 C 32 F 15kohm 10 C 50 F 9 7kohm 20 C 68 F 6 4kohm 25 C 77 F 5 3kohm 30 C 86 F 4 3kohm 40 C 104 F 3 1kohm Resistance check TH2 Pipe temper ature 1 Indoor unit control Frost prevention Hot adjust 2 LEV control during heat ing operation subcool detection TH3 Gas pipe temperature LEV control d...

Page 83: ... 74 ...

Page 84: ... 75 HWE0716A GB VII Control 1 Functions and Factory Settings of the Dipswitches 77 2 Controlling the Outdoor Unit 83 3 Operation Flow Chart 94 ...

Page 85: ... 76 ...

Page 86: ... 1 10 For self diagnosis op eration monitoring Refer to the LED monitor display on the outdoor unit board Anytime after power on C C SW2 1 Centralized control switch Without connec tion to the central ized controller With connection to the centralized controller Before power on B B 2 Deletion of connec tion information Normal control Deletion Before power on A 3 Deletion of error his tory SW OC St...

Page 87: ...d temper ature 10 C 50 F 15 C 59 F Anytime after power on except during defrost op eration B B 5 Target evaporating temperature setting Depends on the setting combination with the SW2 9 setting Note 4 Anytime after power on A 6 Temperature unit setting C F Anytime after power on C C 7 Target condensing temperature setting for heating 49 C 120 F 53 C 127 F A 8 9 Model setting To change the external...

Page 88: ...t connector is mated with the mating connector Leave the short circuit connector on the mating connector during normal operation to enable error detection and protect the equipment from damage Switch Function Function according to switch setting Switch setting timing Units that re quire switch setting Note 2 OFF ON OFF ON OC OS SW5 1 2 3 4 5 Low noise mode selection Capacity priority mode Note 3 L...

Page 89: ...n 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 Enabled Disabled Disabled Enabled Enabled Not available Available Not available Available Not available Not available Available Not available Available Not available Available ...

Page 90: ...e MA remote controller PAR 21MAA does not have the switches listed above Refer to the installation manual for the func tion setting Remote controller Switching switch 1 ON 2 3 4 Switch 2 1 Function Remote controller main sub setting At power on of the remote controller Normal startup Timer mode startup 3 Cooling heating display set by automatic setting Displayed Not displayed 4 Suction temperature...

Page 91: ...s 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 automatically being set to 1 2 00 200 1 At factory shipment the rotary swit...

Page 92: ...ation does not change the basic operation of OC and OS Only startup sequence is changed Startup sequence of the outdoor units can be checked with the self diagnosis switch SW1 on the OC 3 Initial Control When the power is turned on the initial processing of the microcomputer is given top priority During the initial processing control processing of the operation signal is suspended The control proc...

Page 93: ...OFF when 63HS1 or 2 63LS is 0 2 MPa 29 psi or less After the operation has stopped ON for 3 minutes Exception OFF when 63HS1 or 2 63LS is 0 2 MPa 29 psi or less During defrost cycle ON During oil recovery operation OFF during oil recovery operation cooling heating after low frequency continuous operation During cooling operation during compres sor frequency Fmin operation or when low pressure 63LS...

Page 94: ...ming operation after the comple tion of the defrost cycle ON for 5 minutes At NO1 compressor startup outdoor tem perature 15 C 5 F or lower or after re suming operation after the completion of the defrost cycle outdoor temperature 15 C 5 F or lower ON when 5 minutes or less have passed and 63HS1 or 2 1 76MPa 255 psi OFF when 5 minutes or more have passed or 63HS1 or 2 1 76MPa 255 psi When the comp...

Page 95: ...econds The actuation pressure is when the high pressure reading on 63HS1 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 st...

Page 96: ...perature exceeds ǩ below within 2 minutes 25 C ǩ Outdoor temperature TH7 25 C 5 C 77 F ǩ Outdoor temperature TH7 45 F 41 F In the multiple outdoor unit system 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 opera...

Page 97: ...y has been completed 2 During cooling operation Starting refrigerant recovery mode The refrigerant recovery mode starts when all the following conditions are met 30 minutes have passed since the completion of previous refrigerant recovery When the unit keeps running for 3 minutes in a row or more with high discharge temperature TH4 105 C 221 F or 63HS1 3 43 MPa 497 psi 35 kg cm2 G and SC0 10 C 18 ...

Page 98: ...nd OS Compressor discharge superheat control adjusts compressor discharge superheat that is calculated by compressor dis charge temperature TH4 and high pressure 63HS1 to be in the certain range as shown in the table below every 30 seconds 3 Intermediate pressure control OC interlocks with OS and performs intermediate pressure control However valve opening of OC and OS differs depending on refrige...

Page 99: ...pleted in the integrated operation time of 90 minutes The compressor on the OC remains in operation and the compressor on the OS starts up 50 F 60Hz OC or F 50Hz OC Completed in the integrated operation time of 35 minutes Completed in the integrated operation time of 90 minutes The compressor on the OC starts up Both the OC and OS stop The startup sequence of the OC and OS is rotated 50 F 60Hz OS ...

Page 100: ...ttern 2 outdoor units Trouble source Error codes that permit an emergency operation Error code description Serial communication error Bus voltage drop Heatsink overheat protection Overload protection Overcurrent relay trip Heatsink temperature sensor failure THHS Current sensor circuit failure Subcool heat exchanger bypass outlet temperature sensor failure Pipe temperature sensor failure Discharge...

Page 101: ...tion Precautions before servicing the unit When the OC is in trouble the OS temporarily takes over the OC s function and performs an emergency operation When this happens the indoor unit connection information are changed In a system that has a billing function a message indicating that the billing system information has an error may appear on the TG 2000A Even if this message appears do not chang...

Page 102: ...ction has the priority 14 DEMAND Control Cooling heating operation can be prohibited Thermo OFF by an external input to the indoor units When DIP SW4 4 is set to ON the 4 step DEMAND control is enabled Eight step demand control is possible in the system with two outdoor units Twelve step demand control is possible in the system with three outdoor units Refer to Chapter 2 3 2 7 Various types of con...

Page 103: ...r stop Error display Self holding of protection function Error command to outdoor unit Indoor unit LEV fully closed Refer to 2 1 Cooling operation Refer to 2 2 Heating operation Refer to 2 3 for dry operation Prohibition Prohibition Prohibition Dry display Heating display Cooling display Dry mode Heating mode Fan mode Fan display Fan operations Operation mode Cooling mode Operation command to outd...

Page 104: ...to the operation mode commanded by the indoor unit However when the outdoor unit is running a cooling operation come of the operating indoor units will stop or the operation of these indoor units will be prohibited even when the indoor unit mode is switched from fan mode to heating mode This also applies when the outdoor unit is running a heating operation Start Breaker turned on Operation command...

Page 105: ... minute restart prevention Note 1 YES YES YES NO NO NO 4 way valve OFF 1 Inverter frequency control 2 Indoor unit LEV LEV1 control LEV2a LEV2b fully opened 3 Solenoid valve control 4 Outdoor unit fan control 5 72C control Normal operation During test run mode Unit in the stopped state Indoor unit fan operation 1 Inverter output 0Hz 2 Indoor unit LEV LEV1 LEV2a LEV2b rated opening 3 All solenoid va...

Page 106: ...ute restart prevention Note 1 2 Note 1 2 YES YES YES YES YES NO NO NO NO NO 1 Indoor outdoor unit fan control 2 Inverter frequency control 3 Indoor unit LEV LEV1 LEV2a LEV2b control 4 Solenoid valve control 5 72C control Normal operation Defrost operation 4 way valve ON During test run mode 1 Indoor unit fan operation at Very Low speed 2 Inverter output 0Hz 3 Indoor unit LEV LEV1 Fully closed LEV2...

Page 107: ...F 1 or 2 Note 1 When the indoor unit inlet temperature exceeds 18 C 64 F the outdoor unit compressor and the indoor unit fan start the intermittent operation simultaneously When the indoor unit inlet temperature becomes 18 C 64 F or less the fan always runs at low speed The outdoor unit the indoor unit and the solenoid valve operate in the same way as they do in the cooling operation when the comp...

Page 108: ...before a Test Run 101 2 Test Run Method 102 3 Operating Characteristic and Refrigerant Amount 103 4 Adjusting the Refrigerant Amount 103 5 Refrigerant Amount Adjust Mode 106 6 The following symptoms are normal 108 7 Standard Operation Data Reference Data 109 ...

Page 109: ... 100 ...

Page 110: ...pressor 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 3 Check that the valve on the gas pipe and liquid pipe are fully open Securely tighten the cap 4 Check the phase sequence and the voltage of the power supply 5 When a transmission booster is connected Turn on the transmi...

Page 111: ... Switch to cooling or heating operation by pressing the Operation Mode button Press the Fan Speed button Change the air flow direction by pressing the Vertical Air Direction button or the Louver button Confirm the operation of outdoor unit fan Confirm the operation of all interlocked equipment such as ventilation equipment Note 1 Refer to the following pages if an error code appears on the remote ...

Page 112: ...t Amount 1 Symptoms 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 2 Amount of refrigerant 1 To be checked during operation Operate all indoor units in ...

Page 113: ...oor unit model HP72 HP96 Amount of pre charged refrigerant in the outdoor unit kg 9 0 9 0 Amount of pre charged refrigerant in the outdoor unit lbs oz 19 13 19 13 Amount of added refrigerant kg 0 2 x L1 0 12 x L2 0 06 x L3 0 024 x L4 ǩ Amount of added refrigerant oz 2 15 x L1 1 29 x L2 0 65 x L3 0 26 x L4 ǩ L1 Length of ø15 88 5 8 liquid pipe m L2 Length of ø12 7 1 2 liquid pipe m L3 Length of ø9 ...

Page 114: ...iquid separator All the pipes in the figure are liquid pipes 15 88 30 m 9 52 3 m 1m 10 m 10 m 20 m 10 m 10 m 64 m 6 35 10 m According to the above formula The calculation result would be 16 28 and it is rounded up to the nearest 0 1 The final result will be as follows Amount of refrigerant to be charged kg 0 2 X 30 0 12 X 10 0 06 X 64 0 024 X 10 5 0 16 28kg Amount of refrigerant to be charged 16 3...

Page 115: ...equate for a short while after starting the unit in the refrigerant amount adjust mode but turn out to be inadequate later on when the refrigerant system stabilizes When the amount of refrigerant is truly adequate TH3 TH6 on the indoor unit is 5 C 9 F or above and SH on the indoor unit is between 5 and 15 C 9 and 27 F The refrigerant amount may seem adequate at the moment but may turn out to be in...

Page 116: ...pressure side Keep the unit running for 5 minutes after adjusting the refrigerant amount to determine its adequacy Keep the unit running for 5 minutes after adjusting the refrigerant amount to determine its adequacy Turn off SW4 3 on the OC Turn on SW4 3 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 pres...

Page 117: ...n 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 controller for 5 minutes HO or PLEASE WAIT icons blink on the display The system is starting up Wait until the blinking display of HO or PLEASE WAIT go off The drain pump keeps run ning after the un...

Page 118: ...25 82 25 82 Fan speed Hi Hi Amount of refrigerant kg lbs oz 11 3 25 13 8 30 1 2 Outdoor unit Electric current A 17 8 24 0 Voltage V 230 230 Compressor frequency Hz 50 64 LEV open ing Indoor unit Pulse 325 325 387 387 SC LEV1 55 67 LEV2 1400 1400 LEV4 0 0 Pressure High pressure after O S low pres sure before accumulator MPa psi 2 77 0 74 402 107 2 92 0 86 424 125 Temp of each sec tion Outdoor unit ...

Page 119: ...Fan speed Hi Hi Amount of refrigerant kg lbs oz 11 3 25 13 8 30 1 2 Outdoor unit Electric current A 18 3 23 6 Voltage V 230 230 Compressor frequency Hz 55 72 LEV open ing Indoor unit Pulse 325 325 406 406 SC LEV1 0 0 LEV2 1400 1400 LEV4 0 0 Pressure High pressure after O S low pres sure before accumulator MPa psi 2 81 0 66 408 96 2 87 0 67 416 97 Temp of each sec tion Outdoor unit Discharge TH4 C ...

Page 120: ...eed Hi Amount of refrigerant kg lbs oz 20 9 46 3 16 Outdoor unit Electric current A 34 9 Voltage V 230 Compressor frequency Hz 50 50 LEV open ing Indoor unit Pulse 325 325 325 325 SC LEV1 55 55 LEV2 1400 LEV4 0 Pressure High pressure after O S low pres sure before accumulator MPa psi 2 77 0 74 402 107 2 77 0 74 402 107 Temp of each sec tion Outdoor unit Discharge TH4 C F 84 183 84 183 Heat exchang...

Page 121: ...igerant kg lbs oz 26 4 58 5 16 Outdoor unit Electric current A 50 8 Voltage V 230 Compressor frequency Hz 64 64 LEV open ing Indoor unit Pulse 387 387 387 387 SC LEV1 67 67 LEV2 1400 LEV4 0 Pressure High pressure after O S low pres sure before accumulator MPa psi 2 92 0 86 424 125 2 92 0 86 424 125 Temp of each sec tion Outdoor unit Discharge TH4 C F 84 183 84 183 Heat exchanger outlet TH3 47 117 ...

Page 122: ... Fan speed Hi Amount of refrigerant kg lbs oz 20 9 46 3 16 Outdoor unit Electric current A 38 8 Voltage V 230 Compressor frequency Hz 55 55 LEV open ing Indoor unit Pulse 325 325 325 325 SC LEV1 0 0 LEV2 1400 LEV4 0 Pressure High pressure after O S low pres sure before accumulator MPa psi 2 81 0 66 408 99 2 81 0 66 408 99 Temp of each sec tion Outdoor unit Discharge TH4 C F 84 183 84 183 Heat exch...

Page 123: ... Hi Amount of refrigerant kg lbs oz 26 4 58 5 16 Outdoor unit Electric current A 49 2 Voltage V 230 Compressor frequency Hz 72 72 LEV open ing Indoor unit Pulse 406 406 406 406 SC LEV1 0 0 LEV2 1400 LEV4 0 Pressure High pressure after O S low pres sure before accumulator MPa psi 2 81 0 66 408 96 2 81 0 66 408 96 Temp of each sec tion Outdoor unit Discharge TH4 C F 84 183 84 183 Heat exchanger outl...

Page 124: ...ding to Error Display on the Remote Controller 120 3 Investigation of Transmission Wave Shape Noise 185 4 Troubleshooting Principal Parts 188 5 Refrigerant Leak 206 6 Compressor Replacement Instructions 208 7 Troubleshooting Using the Outdoor Unit LED Error Display 210 ...

Page 125: ... 116 ...

Page 126: ...4102 4152 Open phase O 4106 Transmission power supply fault O 4115 Power supply signal sync error O 4116 RPM error Motor error O O 4220 4225 Note 4320 4325 Note 108 Abnormal bus voltage drop O 109 Abnormal bus voltage rise O 110 VDC error O 111 Logic error O 4230 4330 Heatsink overheat protection O 4240 4340 Overload protection O 4250 4255 Note 4350 4355 Note 101 IPM error O 102 ACCT overcurrent H...

Page 127: ...sensor fault Outside temperature TH7 O 5110 1214 01 Temperature sensor fault Heatsink temperature THHS O 5201 High pressure sensor fault 63HS1 O 5301 4300 115 ACCT sensor fault O 116 DCCT sensor fault O 117 ACCT sensor circuit fault O 118 DCCT sensor circuit fault O 119 Open circuited IPM Loose ACCT connector O 120 Faulty ACCT wiring O 5701 Loose float switch connector O 6201 Remote controller boa...

Page 128: ...ontroller signal transmission error Hardware error O O 6834 MA controller signal reception error Start bit de tection error O O 7100 Total capacity error O 7101 Capacity code setting error O O O 7102 Wrong number of connected units O 7105 Address setting error O 7106 Attribute setting error O 7110 Connection information signal transmission recep tion error O 7111 Remote controller sensor fault O O...

Page 129: ...ntrol board and the Fan board 3 Cause check method and remedy 1 Faulty wiring Check the following wiring connections 1 Between Control board and Fan board 2 Between Fan board and INV board 2 INV board failure Fan board failure and Control board failure Replace the INV board or the Fan board or control board when the power turns on automatically even if the power source is reset Refer to section 6 ...

Page 130: ...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 1102 Cause Check method and remedy 1 Gas leak gas shortage Refer to the page on refrigerant amount evaluation 2 Overload operation Check operating conditions and operation status of indoor outdoor units 3 LEV failure on the in...

Page 131: ...t up the operation immediately stops 3 Cause check method and remedy 1301 Cause Check method and remedy 1 Inner pressure drop due to a leakage Refer to the section on troubleshooting the low pressure sensor page 189 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 Disconnected wire 6 Failure of the low pressur...

Page 132: ...m a cooling or heating operation to check the opera tion Cooling Indoor unit LEV LEV1 2a 2b Heating Indoor unit LEV LEV2a 2b Refer to the section on troubleshooting the LEV page 192 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 indo...

Page 133: ...tes or more after the first stoppage of the outdoor unit the same se quence as Item 1 above first detection is followed 4 For 30 minutes after the stop of the outdoor unit preliminary errors will be displayed on the LED display 3 Cause check method and remedy 1302 Cause Check method and remedy 1 Inner pressure drop due to a leakage Refer to the page on the troubleshooting of the high pressure sens...

Page 134: ...topped 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 2500 Cause Check method and remedy 1 Drain wat...

Page 135: ...ter 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 2500 Cause Check method and remedy 1 Drain water drainage problem Clogged drain pump Clogged drain piping Backflow of drain water from other units Check fo...

Page 136: ...an 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 that was identified as the error source and the outdoor unit that is connected to the same re...

Page 137: ...ngs the outdoor unit in the same refrigerant circuit to an error stop compressor operation prohibited and the outdoor 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 6 Forced stoppage of the outdoor unit Detection timing The error is detected whether the unit is in operation or stopped This error is detected whether the ...

Page 138: ...ure 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 2503 Cause Check method and remedy 1 Faulty connector CN31 insertion 1 Check for connector connection failure Reinsert the connector restart the operation and chec...

Page 139: ...601 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 water tank Turn off the power source of the wat...

Page 140: ...r 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 3121 Cause Check method and remedy 1 Thermistor failure Check thermistor resistance 2 Pinched lead wire Check for pinched lead wire 3 Torn wire ...

Page 141: ...m Coil L1 L3 problem Circuit board failure Check the coil connections Check for coil burnout Confirm that the voltage at the CN02 connector is 188 V or above 3 Wiring failure Confirm that the voltage at the control board connector CNAC is 188 V or above If the voltage is below 188V check the wiring connection between the noise filter board CN02 and control board CNAC Confirm that the wiring betwee...

Page 142: ...door unit Confirm that no other power supply units or outdoor units LED1 on the transmission power board is lit are supplying power to the given indoor unit system 1 Error Code Transmission power supply fault Other than Error Detail Code FF Outdoor unit 2 Error definition and error detection method Transmission power reception failure 3 Cause One of the outdoor units stopped supplying power but no...

Page 143: ... Cause Check method and remedy 1 Power supply error Check the voltage of the power supply terminal block TB1 2 Noise filter problem Coil L1 L3 problem Circuit board failure Check the coil connections Check for coil burnout Confirm that the voltage at the CN02 connector is 188 V or above 3 Faulty wiring Check fuse F01 on the control board 4 Wiring failure Between noise filter board CN02 and control...

Page 144: ...ard while the inverter is stopped and if it is less than 220 V check the following items 1 Check the connection to SCP1 and IPM N on the INV board 2 Check the wiring between the noise filter board and INV board 3 Check the resistance of the diode stack Refer to 4 6 6 page 203 4 Check the in rush current resistor value Refer to 4 6 4 page 201 5 Replace the noise filter board 4225 Check the voltage ...

Page 145: ...t is found In the case of 4220 INV board In the case of 4225 Fan board Refer to section 6 Inverter under part 4 Trouble shooting principal parts for error codes related to the inverter page 196 1 Error Code VDC error Detail code 110 2 Error definition and error detection method Bus voltage abnormality If Vdc 400V or Vdc 160V is detected H W detection 3 Cause check method and remedy Same as detail ...

Page 146: ...d and remedy In the case of 4220 In the case of 4225 Refer to section 6 Inverter under part 4 Trouble shooting principal parts for error codes related to the inverter page 196 4220 4225 Cause Check method and remedy 1 External noise Refer to 9 4 6 2 1 page 198 2 INV board failure 3 IPM failure Replace the IPM 4 DCCT failure Replace the DCCT Cause Check method and remedy 1 External noise Refer to 9...

Page 147: ...e inverter page 196 4230 Cause Check method and remedy 1 Fan board failure Refer to 9 4 6 2 6 page 199 2 Outdoor unit fan failure Check the outdoor unit fan operation If any problem is found with the fan operation check the fan motor Refer to 9 4 6 2 5 page 199 3 Air passage blockage Check that the heat sink cooling air passage is not blocked 4 THHS failure Check the THHS sensor reading on the LED...

Page 148: ... error codes related to the inverter page 196 4240 Cause Check method and remedy 1 Air passage blockage Check that the heat sink cooling air passage is not blocked 2 Power supply environment Power supply voltage is 180 V or above 3 Inverter failure Refer to 9 4 6 page 196 4 Current sensor ACCT failure Refer to 9 4 6 4 page 201 5 Compressor failure Check that the compressor has not overheated durin...

Page 149: ... and remedy In the case of 4250 In the case of 4255 Refer to section 6 Inverter under part 4 Trouble shooting principal parts for error codes related to the inverter page 196 4250 4255 Cause Check method and remedy 1 Inverter output related Refer to 9 4 6 2 1 4 page 198 2 Same as 4230 error Same as 4230 error Cause Check method and remedy 1 Fan motor abnormality Refer to 9 4 6 2 5 page 199 2 Fan b...

Page 150: ... fault Detail code 104 2 Error definition and error detection method When IPM short damage or grounding on the load side is detected just before starting the inverter 3 Cause check method and remedy In the case of 4250 In the case of 4255 Refer to section 6 Inverter under part 4 Trouble shooting principal parts for error codes related to the inverter page 196 4250 Cause Check method and remedy 1 I...

Page 151: ...e Heatsink overheat protection at startup 2 Error definition and error detection method The heatsink temperature THHS remains at or above TOH for 10 minutes or more at inverter startup 3 Cause check method and remedy Same as 4230 error Refer to section 6 Inverter under part 4 Trouble shooting principal parts for error codes related to the inverter page 196 4250 4255 Cause Check method and remedy 1...

Page 152: ...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 heating operation During cooling operation for 3 minutes after the compressor turns on 3 Cause che...

Page 153: ...r is detected just before the restart of the outdoor unit the outdoor unit makes an error stop and the error code 5102 5103 5104 5105 5106 or 5107 will appear During 3 minute antirestart mode preliminary errors will be displayed on the LED display A short or an open described above is not detected for 10 minutes after the compressor start during defrost mode or for 3 minutes after defrost mode 3 C...

Page 154: ...oor unit makes an error stop and the error code 5201 will appear During 3 minute antirestart mode preliminary errors will be displayed on the LED display A error is not detected for 3 minutes after the compressor start during defrost operation or 3 minutes after defrost operation 3 Cause check method and remedy 5110 Cause Check method and remedy 1 THHS sensor failure Check the THHS sensor reading ...

Page 155: ...k method and remedy Refer to section 6 Inverter under part 4 Troubleshooting Principal Parts for error codes related to the inverter page 196 5301 Cause Check method and remedy 1 Inverter open output phase Check the output wiring connections 2 Compressor failure Refer to 9 4 6 2 2 page 198 3 INV board failure Refer to 9 4 6 2 1 page 198 4 Contact failure Check the connection of the connector CNCT2...

Page 156: ...ror value is detected with the DCCT detection circuit just before the inverter starts 3 Cause check method and remedy Refer to section 6 Inverter under part 4 Troubleshooting Principal Parts for error codes related to the inverter page 196 5301 Cause Check method and remedy 1 INV board failure Refer to 9 4 6 2 1 page 198 2 Compressor failure Refer to 9 4 6 2 2 page 198 5301 Cause Check method and ...

Page 157: ...eration immediately before startup Detection of improperly mounted ACCT sensor 3 Cause check method and remedy Refer to section 6 Inverter under part 4 Trouble shooting principal parts for error codes related to the inverter page 196 5301 Cause Check method and remedy 1 ACCT sensor disconnection Check the connection of the connector CNCT2 on the INV board Check for proper mounting of ACCT 2 ACCT s...

Page 158: ... fault nonvolatile memory error 2 Error definition and error detection method This error is detected when the 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 1 Error Code Remote controller board fault clock IC error 2 Error definition and error detection method This error...

Page 159: ...0 Cause Check method and remedy Two or more of the following have the same address Outdoor units indoor units LOSSNAY units control lers such as M NET 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 corre...

Page 160: ...ts connected to different outdoor units or in case of the system connected with MELANS 4 Check method and remedy 6602 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 line work performed while the power is on Check the power source of the indoor unit 188 253V Check the transmission line wor...

Page 161: ...on the display on the remote controller indicates the controller where an error oc curred 3 Cause check method and remedy 6603 Cause Check method and remedy 1 The transmission processor cannot be transmit ted as the short wavelength voltage like noise ex ists consecutively on the transmission line No noise indicates that the error source controller is a fail ure If noise exists investigate the noi...

Page 162: ...A remote controller MA No acknowl edgement ACK at RC transmis sion to IC 1 When IC unit address is changed or modified during operation Turn off the outdoor indoor units for 5 or more minutes and turn them on again If the error is accidental they will run normally If not check the causes 1 5 2 Faulty or disconnected IC trans mission wiring 3 Disconnected IC connector CN2M 4 Indoor unit controller ...

Page 163: ...wer sources of the outdoor and indoor units for 5 or more minutes and turn them on again If the error is accidental the will run normal ly If not check the cause 2 2 Disconnection or short circuit of the transmission line for the outdoor unit on the termi nal block for centralized con trol line connection TB7 2 Check the causes of 1 5 If the cause is found correct it If no cause is found check 3 3...

Page 164: ...ts that are connect ed to different outdoor units 1 Turn off the power source of LOSSNAY for 5 or more min utes and turn it on again If the error is accidental it will run normally If not check the cause 2 2 Disconnection or short circuit of the transmission line for the outdoor unit on the termi nal block for centralized con trol line connection TB7 2 Check the causes of 1 5 If the cause is found...

Page 165: ... of LOSSNAY for 5 or more min utes and turn it on again If the error is accidental it will run normally If not check the cause 2 2 Disconnection or short circuit of the transmission line for the outdoor unit on the termi nal block for centralized con trol line connection TB7 2 Check the causes of 1 5 If the cause is found correct it If no cause is found check 3 3 When multiple outdoor units are co...

Page 166: ...l ler SC No acknowl edgement ACK at SC transmis sion to IC 1 Error occurrence on some IC Same remedy as that for system with one outdoor unit 1 Same cause as that for system with one outdoor unit 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the outdoor unit 1 Total capacity error 7100 If an error is found check the check code defin...

Page 167: ...e IC Same remedy as that for system with one outdoor unit 1 Same cause as that for system with one outdoor unit 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the out door unit 1 An error is found by the outdoor unit Total capacity error 7100 Capacity code error 7101 Error in the number of connected units 7102 Address setting error 7...

Page 168: ...roller 3 M NET remote controller failure 2 Error occurrence on all IC in the system with one outdoor unit 1 Check the LED display for troubleshooting on the out door unit 1 An error is found by the outdoor unit Total capacity error 7100 Capacity code error 7101 Error in the number of connected units 7102 Address setting error 7105 If an error is found check the check code definition and correct th...

Page 169: ...h some indoor units have Use either of the following two methods for deletion 2 Although the address of LOSSNAY has been changed after the interlock registration of LOSSNAY is made using M NET remote controller the in door unit is keeping the mem ory of the previous address 1 Address deletion by M NET re mote controller Delete unnecessary address in formation using the manual set ting function of ...

Page 170: ... line 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 When an error occurs during commissioning turn off the power sources for the outdoor unit indoo...

Page 171: ...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 172: ...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 set to MAIN 5 Diagnose the remote controller described in the r...

Page 173: ...r 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 co...

Page 174: ...he 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 ...

Page 175: ...r unit set by the switch SW2 on indoor unit board When the model name set by the switch is differ ent from that of the unit connected turn off the power source of the outdoor and the indoor units and change the setting of the model name ca pacity code 2 The model selection switches SW5 1 5 4 on the outdoor unit are set incorrectly Check the setting for the model selection switch on the outdoor uni...

Page 176: ...the error source address set by the switch SW2 on indoor unit board When the model name set by the switch is different from that of the unit connected turn off the power source of the outdoor and the indoor units and change the setting of the capacity code The capacity of the indoor unit can be confirmed by the self diagnosis function SW1 operation of the outdoor unit Outdoor unit 2 The model sele...

Page 177: ...nd 3 apply the following display will 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 M NET 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 ...

Page 178: ... that the address of the OC unit is set to 00 or between 51 and 100 Reset the address if it is out of the range with the power supply turned off 7106 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 unit directly via a re mote controller...

Page 179: ...y 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 Wiring failure between OC and OS 2 Confirm that the TB3 on the OC and OS are properly connected 4 Broken wire between OC and OS 3 Check the model selection...

Page 180: ...and replace it with a correct one if necessary 3 Incompatibility between the control board and inverter board Replace ment of the circuit board with the wrong one 3 Check the model selection switch on the outdoor unit Dipswitch SW5 7 on the control board 7117 Error source Cause Check method and remedy Outdoor unit 1 Wiring failure 1 Control board connector Check the CNTYP4 5 connector connection I...

Page 181: ...ection 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 unit or reversed p...

Page 182: ...r 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 block for M NET line TB5 of the indoor unit and the indoor unit board CN2M or disconnected co...

Page 183: ... 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 the indoor unit The M NET transmission line is connected incorrectly to t...

Page 184: ... 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 than 20 seconds since turning the power on is LED2 check of the indoor control board still displayed Is the operation by MELANS for...

Page 185: ...isconnected line to the terminal 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 Refer to 9 7 Troubleshooting Using the Outdoor Unit LED Error Display page 210 2 Check method and remedy 1 Check voltage of the tran...

Page 186: ... 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 SW1 for self diagnosis Check voltage of the power supply terminal on the indoor unit AC208 230V Check the fuse on the circuit board Melted Check 200V circuit for short circuit and ground fault Check the connection of the connector Check the main power ...

Page 187: ...rol TB7 of the outdoor unit 3 The male power supply connector is connected to CN40 on more than one outdoor unit or the connector is connected to CN40 on the outdoor unit in the system to which a power supply unit for transmission line is connected Using MELANS 1 When MELANS is used HO display on the remote controller will disappear when the indoor unit and the local remote con troller M NET remot...

Page 188: ... 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 not disconnect ed 8 Wh...

Page 189: ...em causes insufficient capacity SW1 setting Note Protection works and compressor frequency does not rise even at higher Te than Tem due to high dis charge temperature and high pressure At high discharge temperature Refer to 1102 page 121 At high pressure Refer to 1302 page 123 2 Indoor unit LEV malfunction Refer to the page of LEV troubleshooting 4 5 page 192 Insufficient refrigerant flows due to ...

Page 190: ...foreign object may clog the pipe Remove the foreign object inside the pipe 8 The indoor unit inlet temperature is excessively Less than 15 C 59 F WB Check the inlet air temperature and for short cy cling Change the environment where the indoor unit is used 9 Compressor failure The amount of circulating refrigerant decreases due to refrigerant leak in the compressor Check the discharge temperature ...

Page 191: ...ck the pressure sensor Refer to the page on Trouble shooting of Pressure Sensor Note Higher inlet pressure by the high pressure sensor than the actual pressure causes insufficient capac ity SW1 setting 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 SW1 setting Note...

Page 192: ...hange the pipe 7 Piping size is not proper thin 8 Clogging by foreign object Check the temperature difference between the up stream and the downstream of the pipe section that is blocked 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 b...

Page 193: ...y with SW1 Refer to the reference page for each error mode 1 Abnormal high pressure 2 Abnormal discharge air temperature 3 Heatsink thermistor failure Display the indoor piping temperature table with SW1 to check whether the freeze proof operation runs properly and check the temperature 4 Thermistor failure 5 Pressure sensor failure 6 Over current break 7 Refrigerant overcharge Note1 Frost prevent...

Page 194: ...nded 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 Transmission pro cessor hardware er...

Page 195: ...n 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 environment against noise vari...

Page 196: ...ation 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 controller Transmission wa...

Page 197: ...es not change the high pressure sensor has a problem 3 Remove the high pressure sensor the intermediate pressure sensor from the control board to check the pressure on the self diagnosis LED1 1 When the pressure displayed on self diagnosis LED1 is between 0 and 0 098MPa 14psi the high pressure sensor has a problem 2 When the pressure displayed on self diagnosis LED1 is approximately 4 15MPa 601psi...

Page 198: ...a problem 2 When the pressure displayed on self diagnosis LED1 is approximately 1 7MPa 247psi the control board has a problem When the outdoor temperature is 30 C 86 F or less the control board has a problem When the outdoor temperature exceeds 30 C 86 F go to 5 4 Remove the low pressure sensor from the control board and short circuit between the No 2 and 3 connectors 63LS CN202 to check the press...

Page 199: ...de as the outer hull will be deformed leading to the malfunction of the inner valve 2 In case of SV1a Bypass valve This solenoid valve opens when powered Relay ON 1 At compressor start up the SV1a turns on for 4 minutes and the operation can be checked by the self diagnosis LED display and the closing sound 2 To check whether the valve is open or closed check the change of the SV1a downstream pipi...

Page 200: ...g sound of the valve 2 Proper operation can be verified on the LED and by listening for the operation sound page 85 3 The operation status can be verified by checking the temperature of the bypass circuit or by listening for the operation sound of the valve Do not give an impact from outside as the outer hull will be deformed leading to the malfunction of the inner valve 4 Outdoor Unit Fan To chec...

Page 201: ...hite Red Orange White Brown Blue Yellow 6 5 4 4 3 2 1 3 2 1 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 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 O...

Page 202: ... 2 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 When the power is turned on the valve closing signal of 520 pulses will be output from the indoor board to LEV to fix the valve position It must be fixed at point A Pulse signal is...

Page 203: ...blue using a tester They are normal if resistance is 150ohm 10 Replace the LEV coils Indoor Outdoor LEV2a LEV2b Measure resistance between the coils red white red orange brown yellow brown blue using a tester They are normal if resistance is 46ohm 3 Replace the LEV coils Outdoor LEV1 Incomple sealing leak from the valve When checking the refrigerant leak from the indoor LEV run the target indoor u...

Page 204: ...t 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 Hold the body when pulling out the coils to prevent so that the pipe will not be bent If the coils are pushed without the...

Page 205: ...ower wait for 5 to 10 minutes and confirm that the voltage at both ends of the electrolytic capacitor has dropped to a sufficiently low level 2 The IPM on the inverter becomes damaged if there are loose screws are connectors If a problem occurs after replacing some of the parts mixed up wiring is often the cause of the problem Check for proper connection of the wiring screws connectors and Faston ...

Page 206: ...d Check the inverter frequency on the LED monitor and proceed to 2 6 if the fan motor is in operation 8 Noise is picked up by the peripheral device 1 Check that power supply wiring of the peripheral device does not run close to the power supply wiring of the outdoor unit 2 Check that the inverter output wiring is not in close contact with the power supply wiring and the transmission lines 3 Check ...

Page 207: ...nit back into oper ation If the problem persists replace the INV board Replace the INV board and put the outdoor unit back into opera tion If the problem persists replace the DCCT 3 ACCT sensor circuit failure 5301 Detail code No 117 Replace the INV board 4 DCCT sensor circuit failure 5301 Detail code No 118 Replace the DCCT board Replace the DCCT and put the outdoor unit back into operation If th...

Page 208: ...ere is an voltage imbalance be tween the wires Greater than 5 imbalance or 5V Replace the IPM If the problem persists re place the INV board If the problem persists after replacing the above parts go to section 2 5 Check the fan motor ground fault or the winding Remove the wire for the out door fan motor and check the fan motor megger and the winding resistance 1 Fan motor megger failure Failure w...

Page 209: ... circuit Diode stack IPM Rush current protection resistor Electromagnetic relay DC reactor 2 Turn on the power again and check again 1 Main power breaker trip 2 No remote control display 3 Turn on the outdoor unit and check that it operates normally 1 Operates normally without tripping the main breaker a The wiring may have been short circuited Search for the wire that short circuited and repair i...

Page 210: ...en by a coil The resistance between the coils in row A cannot be measured with a tester Check only for shorting DC reactor DCL Measure the resistance between terminals 1ohm or lower almost 0 ohm Measure the resistance between terminals and the chassis Current sensor ACCT Disconnect the CNCT2 connector and measure the resistance between terminals 280 ohm 30 ohm 1 2 PIN U phase 3 4 PIN W phase Insta...

Page 211: ... is not allowed 2 Tester restriction Use the tester whose internal electrical power source is 1 5V or greater Use the dry battery powered tester The accurate diode specific resistance cannot be measured with the button battery powered card tester as the applied volt age is low Use a low range tester if possible A more accurate resistance can be measured Judgment value reference Black P N U V W Red...

Page 212: ...tester and use the results for troubleshoot ing Refer to 5 Intelligent power module IPM for notes on measurement and tester selection Judgment value reference Black External view P N to L1 to L2 to L3 Red P 5 200 ohm 5 200 ohm 5 200 ohm N to L1 5 200 ohm Internal circuit diagram to L2 5 200 ohm to L3 5 200 ohm L1 L2 L3 L1 L2 L3 ...

Page 213: ...tifier Smoothing capacitor 15V Power supply Inverter drive circuit Microcomputer 5 V Power supply 12 V Power supply DC DC converter Fuse Inverter Compressor Heat exchanger fan Fuse Fan board Microcomputer 5 V Power supply Inverter Inverter drive circuit Outdoor unit Power source system AC 208 230 V Control system DC 5 30 V 63H1 Inverter reset circuit DC DC converter Microcomputer 5 V Power supply ...

Page 214: ...and CNIT and check for proper connection of connectors Fix the wiring and connector disconnection Check for shorted transmission line for centralized control YES Is there a wiring error or a connector disconnection Replace the control board Check the wiring between the control board and power supply board for the transmission line CN102 and CNIT and check for proper connection of connectors Check ...

Page 215: ...s than 10 C 18 F After the compressor stops collect the refrigerant inside the system repair the leak perform evacuation and recharge new refrigerant Leak spot 4 In the case of outdoor unit handle in the same way as heat ing season 3 Stop all the indoor units and stop the compressor 1 To stop all the indoor units and the compressors turn SW3 2 from ON to OFF when SW3 1 on the outdoor control board...

Page 216: ...ollected 5 Repair the leak 6 After repairing the leak perform evacuation of the extension pipe for the indoor unit and open the refrigerant service valves BV1 and BV2 to adjust refrigerant 4 Leak spot In the case of outdoor unit Heating season 1 Collect the refrigerant in the entire system outdoor unit extended pipe and indoor unit Do not discharge refrigerant into the atmosphere when it is collec...

Page 217: ...e compressor Reassemble them in the reverse order after replacing the compressor Compressor replacement procedures 1 Remove both the top and bottom service panels front panels Electric wiring Frame 2 Remove the control box and the compressor cover front 3 Remove the wires that are secured to the frame and remove the frame Service panel Control box Compressor cover front ...

Page 218: ...place the compressor after debrazing the discharge pipe the suction pipe and the injection pipe Compressor covers top The inside of the compressor cover is lined with sound insulation material Gasket Fixing gasket Mounting support metal Terminal block box Mounting plate Seal material Suction piping Crankcase heater Injection port Discharge pipe Compressor covers right The inside of the compressor ...

Page 219: ... disconnected there is a problem with the wiring to those connectors 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 320 VDC control board failure is suspected 3 Only the software version appears on the LED display 1 Only the software version appears while the transmission ...

Page 220: ... 211 HWE0716A GB X LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 213 ...

Page 221: ... 212 ...

Page 222: ...s can be checked by making the switch setting that corresponds to No 517 in the LED display table 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 1 Display of numerical values Example When the pressure data sensor reads 18 8kg cm2 Item No 58 The unit of pre...

Page 223: ...er 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 G B 50A 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 se...

Page 224: ... 3 Including IC and BC 0000 to 9999 Address and error codes highlighted B If no errors are detected appears on the dis play 3 1100000000 Relay out put display 2 Top 21S4a CH11 SV1a SV2 A A Bottom SV6 4 0010000000 Relay out put display 3 Top SV9 Power sup ply for indoor transmis sion line A A Bottom 5 1010000000 6 0110000000 7 1110000000 Special control Retry opera tion Emergency operation Communic...

Page 225: ... lamp goes off when the error is reset Each unit that comes to an abnormal unit will be given a sequential num ber in ascending order starting with 1 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 17 1000100000 Top Unit No 17 Unit No 18 Unit No 19 Unit No 20 Bottom 18 0100100000 Top Bottom 19 1100100000 Top Bottom 20 0010100000 Indoor unit Operation m...

Page 226: ...0000 30 0111100000 31 1111100000 32 0000010000 33 1000010000 34 0100010000 35 1100010000 36 0010010000 37 1010010000 38 0110010000 39 1110010000 Outdoor unit Operation mode Permissible stop Standby Cooling Heating B 40 0001010000 41 1001010000 42 0101010000 Outdoor unit control mode Stop Thermo OFF Abnormal stop Scheduled control Initial start up Defrost Oil balance Low fre quency oil recovery A A...

Page 227: ...999 9 A A The unit is C 57 1001110000 THBOX 99 9 to 999 9 A A 58 0101110000 High pressure sensor data 99 9 to 999 9 A A The unit is kgf cm 2 59 1101110000 Low pressure sensor data 99 9 to 999 9 A A 60 0011110000 61 1011110000 62 0111110000 63 1111110000 64 0000001000 65 1000001000 66 0100001000 67 1100001000 68 0010001000 69 1010001000 70 0110001000 71 1110001000 Current data No SW1 Item Display U...

Page 228: ...es OC OS 0000 to 9999 B Control data Hz 87 1110101000 Total frequency of each unit 0000 to 9999 A A 88 0001101000 COMP frequency 0000 to 9999 A A 89 1001101000 90 0101101000 91 1101101000 92 0011101000 93 1011101000 All AK OC OS 0000 to 9999 B 94 0111101000 AK 0000 to 9999 A A 95 1111101000 FAN 0000 to 9999 A A Fan output 96 0000011000 Fan inverter output fre quency 0000 to 9999 A A Twice the actu...

Page 229: ... A The unit is V 112 0000111000 113 1000111000 114 0100111000 115 1100111000 116 0010111000 Number of times the unit went into the mode to remedy wet vapor suction 0000 to 9999 117 1010111000 COMP Operation time Upper 4 digits 0000 to 9999 A A The unit is h 118 0110111000 COMP Operation time Lower 4 digits 0000 to 9999 A A 119 1110111000 Integrated cleaning time minute 0000 to 9999 B Current data ...

Page 230: ... events Lower 4 digits 0000 to 9999 A A 125 1011111000 126 0111111000 127 1111111000 128 0000000100 129 1000000100 Integrated operation time of compressor for rotation purpose 0000 to 9999 B The unit is h 130 0100000100 131 1100000100 132 0010000100 133 1010000100 134 0110000100 135 1110000100 136 0001000100 137 1001000100 138 0101000100 139 1101000100 140 0011000100 141 1011000100 142 0111000100 ...

Page 231: ...100 156 0011100100 157 1011100100 158 0111100100 159 1111100100 160 0000010100 161 1000010100 162 0100010100 163 1100010100 164 0010010100 165 1010010100 166 0110010100 167 1110010100 168 0001010100 169 1001010100 170 0101010100 Current data No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The c...

Page 232: ... 1011010100 174 0111010100 175 1111010100 176 0000110100 177 1000110100 Current data No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant system is displayed ...

Page 233: ...rter Error details of inverter 0001 0120 A A 188 0011110100 Error history 6 0000 to 9999 B B 189 1011110100 Error details of inverter Error details of inverter 0001 0120 A A 190 0111110100 Error history 7 0000 to 9999 B B 191 1111110100 Error details of inverter Error details of inverter 0001 0120 A A 192 0000001100 Error history 8 0000 to 9999 B B 193 1000001100 Error details of inverter Error de...

Page 234: ... Cooling Heating B 206 0111001100 207 1111001100 208 0000101100 Outdoor unit control mode Stop Thermo OFF Abnormal stop Scheduled control Initial start up Defrost Oil balance Low fre quency oil recovery A A 209 1000101100 Refrigerant recovery A A 210 0100101100 211 1100101100 Relay output display 1 Lighting Comp in op eration 72C OC Always lit A A 212 0010101100 Relay out put display 2 Lighting To...

Page 235: ...9 9 A A The unit is C 228 0010011100 THBOX 99 9 to 999 9 A A 229 1010011100 High pressure sensor data 99 9 to 999 9 A A The unit is kgf cm 2 230 0110011100 Low pressure sensor data 99 9 to 999 9 A A 231 1110011100 232 0001011100 233 1001011100 234 0101011100 235 1101011100 236 0011011100 237 1011011100 238 0111011100 239 1111011100 240 0000111100 241 1000111100 242 0100111100 Error history No SW1 ...

Page 236: ...999 B Control data Hz 258 0100000010 Total frequency of each unit 0000 to 9999 A A 259 1100000010 COMP frequency 0000 to 9999 A A 260 0010000010 261 1010000010 262 0110000010 COMP operating fre quency 0000 to 9999 A A The unit is rps 263 1110000010 264 0001000010 All AK OC OS 0000 to 9999 B 265 1001000010 AK 0000 to 9999 A A 266 0101000010 FAN 0000 to 9999 A A Fan inverter output 267 1101000010 Fa...

Page 237: ...0 281 1001100010 282 0101100010 COMP bus voltage 00 0 to 999 9 A A The unit is V 283 1101100010 284 0011100010 285 1011100010 286 0111100010 287 1111100010 288 0000010010 COMP Operation time Upper 4 digits 0000 to 9999 A A The unit is h 289 1000010010 COMP Operation time Lower 4 digits 0000 to 9999 A A 290 0100010010 291 1100010010 292 0010010010 Error history No SW1 Item Display Unit A B 1 Remark...

Page 238: ...top events Lower 4 digits 0000 to 9999 A A 296 0001010010 297 1001010010 298 0101010010 299 1101010010 300 0011010010 Integrated operation time of compressor for rotation purpose 0000 to 9999 B The unit is h Error history No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the enti...

Page 239: ...000110010 305 1000110010 306 0100110010 307 1100110010 308 0010110010 309 1010110010 310 0110110010 311 1110110010 312 0001110010 313 1001110010 314 0101110010 315 1101110010 316 0011110010 317 1011110010 318 0111110010 319 1111110010 320 0000001010 321 1000001010 322 0100001010 323 1100001010 324 0010001010 325 1010001010 326 0110001010 327 1110001010 1 A The condition of either OC or OS is displ...

Page 240: ... 0100101010 339 1100101010 340 0010101010 341 1010101010 342 0110101010 343 1110101010 344 0001101010 345 1001101010 346 0101101010 347 1101101010 348 0011101010 349 1011101010 350 0111101010 Current data No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant sy...

Page 241: ...0 to 9999 0000 to 9999 360 0001011010 IC10 Address capacity code 0000 to 9999 0000 to 9999 361 1001011010 IC11 Address capacity code 0000 to 9999 0000 to 9999 362 0101011010 IC12 Address capacity code 0000 to 9999 0000 to 9999 363 1101011010 IC13 Address capacity code 0000 to 9999 0000 to 9999 364 0011011010 IC14 Address capacity code 0000 to 9999 0000 to 9999 365 1011011010 IC15 Address capacity ...

Page 242: ... 1110000110 392 0001000110 393 1001000110 394 0101000110 395 1101000110 396 0011000110 397 1011000110 398 0111000110 399 1111000110 400 0000100110 401 1000100110 402 0100100110 403 1100100110 404 0010100110 405 1010100110 Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually ...

Page 243: ... IC11 Suction temperature 99 9 to 999 9 419 1100010110 IC12 Suction temperature 99 9 to 999 9 420 0010010110 IC13 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 temperat...

Page 244: ... 1011110110 446 0111110110 447 1111110110 448 0000001110 449 1000001110 450 0100001110 451 1100001110 452 0010001110 453 1010001110 454 0110001110 455 1110001110 456 0001001110 457 1001001110 Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the entire ...

Page 245: ...99 9 to 999 9 469 1010101110 IC12 Liquid pipe temperature 99 9 to 999 9 470 0110101110 IC13 Liquid pipe temperature 99 9 to 999 9 471 1110101110 IC14 Liquid pipe temperature 99 9 to 999 9 472 0001101110 IC15 Liquid pipe temperature 99 9 to 999 9 473 1001101110 IC16 Liquid pipe temperature 99 9 to 999 9 474 0101101110 IC17 Liquid pipe temperature 99 9 to 999 9 475 1101101110 IC18 Liquid pipe temper...

Page 246: ... 0100111110 499 1100111110 500 0010111110 501 1010111110 502 0110111110 503 1110111110 504 0001111110 505 1001111110 506 0101111110 507 1101111110 508 0011111110 509 1011111110 510 0111111110 511 1111111110 Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition...

Page 247: ...dress Count up display of number of connected units B 515 1100000001 BC BS TU address Count up display of number of connected units 516 0010000001 OS 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 A 518 0110000001 OC address OC address display B 519 1110000001 520 0001000001 521 1001000...

Page 248: ...perature 99 9 to 999 9 532 0010100001 IC10 Gas pipe temperature 99 9 to 999 9 533 1010100001 IC11 Gas pipe temperature 99 9 to 999 9 534 0110100001 IC12 Gas pipe temperature 99 9 to 999 9 535 1110100001 IC13 Gas pipe temperature 99 9 to 999 9 536 0001100001 IC14 Gas pipe temperature 99 9 to 999 9 537 1001100001 IC15 Gas pipe temperature 99 9 to 999 9 538 0101100001 IC16 Gas pipe temperature 99 9 t...

Page 249: ...553 1001010001 554 0101010001 555 1101010001 556 0011010001 557 1011010001 558 0111010001 559 1111010001 560 0000110001 561 1000110001 562 0100110001 563 1100110001 564 0010110001 565 1010110001 566 0110110001 567 1110110001 568 0001110001 569 1001110001 570 0101110001 571 1101110001 572 0011110001 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrige...

Page 250: ...0001001 IC8SH 99 9 to 999 9 581 1010001001 IC9SH 99 9 to 999 9 582 0110001001 IC10SH 99 9 to 999 9 583 1110001001 IC11SH 99 9 to 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 111100100...

Page 251: ...1001 611 1100011001 612 0010011001 613 1010011001 614 0110011001 615 1110011001 616 0001011001 617 1001011001 618 0101011001 619 1101011001 620 0011011001 621 1011011001 622 0111011001 Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrige...

Page 252: ...0111001 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 100000010...

Page 253: ... 0110100101 663 1110100101 664 0001100101 665 1001100101 666 0101100101 667 1101100101 668 0011100101 669 1011100101 670 0111100101 671 1111100101 672 0000010101 673 1000010101 674 0100010101 675 1100010101 Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition...

Page 254: ...0101 INV board S W version 0 00 to 99 99 A A 677 1010010101 678 0110010101 679 1110010101 Fan board S W version 0 00 to 99 99 A A 680 0001010101 681 1001010101 682 0101010101 683 1101010101 684 0011010101 685 1011010101 686 0111010101 687 1111010101 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant system is displayed ...

Page 255: ...01 Time of error detection 3 2 00 00 to 99 12 1 to 31 Year and month and date alternate display 696 0001110101 Time of error detection 4 00 00 to 23 59 Hour minute 697 1001110101 Time of error detection 4 2 00 00 to 99 12 1 to 31 Year and month and date alternate display 698 0101110101 Time of error detection 5 00 00 to 23 59 Hour minute 699 1101110101 Time of error detection 5 2 00 00 to 99 12 1 ...

Page 256: ... detection 9 2 00 00 to 99 12 1 to 31 Year and month and date alternate display 708 0010001101 Time of error detection 10 00 00 to 23 59 Hour minute 709 1010001101 Time of error detection 10 2 00 00 to 99 12 1 to 31 Year and month and date alternate display 710 0110001101 Time of last data backup be fore error 00 00 to 23 59 Hour minute 711 1110001101 Time of last data backup be fore error 2 00 00...

Page 257: ...1101 IC9 LEV opening 0000 to 9999 723 1100101101 IC10 LEV opening 0000 to 9999 724 0010101101 IC11 LEV opening 0000 to 9999 725 1010101101 IC12 LEV opening 0000 to 9999 726 0110101101 IC13 LEV opening 0000 to 9999 727 1110101101 IC14 LEV opening 0000 to 9999 728 0001101101 IC15 LEV opening 0000 to 9999 729 1001101101 IC16 LEV opening 0000 to 9999 730 0101101101 IC17 LEV opening 0000 to 9999 731 11...

Page 258: ...0111101 760 0001111101 761 1001111101 762 0101111101 763 1101111101 764 0011111101 IC1 Operation mode 0000 Stop 0001 Ventilation 0002 Cooling 0003 Heating 0004 Dry B 765 1011111101 IC2 Operation mode 766 0111111101 IC3Operation mode 767 1111111101 IC4 Operation mode 768 0000000011 IC5 Operation mode Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD...

Page 259: ... 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 785 1000100011 786 0100100011 787 1100100011 788 0010100011 789 1010100011 790 0110100011 791 1110100011 792 0001100011 793 1001100011 794 0101100011 795 1101100011 796 001110001...

Page 260: ...ilter 0000 to 9999 816 0000110011 IC3 filter 0000 to 9999 817 1000110011 IC4 filter 0000 to 9999 818 0100110011 IC5 filter 0000 to 9999 819 1100110011 IC6 filter 0000 to 9999 820 0010110011 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 Data on indoor unit system N...

Page 261: ...1 IC19 filter 0000 to 9999 833 1000001011 IC20 filter 0000 to 9999 834 0100001011 835 1100001011 836 0010001011 837 1010001011 838 0110001011 839 1110001011 840 0001001011 841 1001001011 842 0101001011 843 1101001011 844 0011001011 845 1011001011 846 0111001001 847 1111001011 848 0000101011 849 1000101011 850 0100101011 851 1100101011 852 0010101011 Data on indoor unit system No SW1 Item Display U...

Page 262: ...1011 858 0101101011 859 1101101011 860 0011101011 861 1011101011 862 0111101011 863 1111101011 Data on indoor unit system No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the entire refrigerant system is displayed ...

Page 263: ...ent effec tive value 1 99 9 to 999 9 A A 873 1001011011 Power factor phase an gle 1 99 9 to 999 9 A A The unit is deg 874 0101011011 875 1101011011 876 0011011011 877 1011011011 878 0111011011 879 1111011011 880 0000111011 Control board Reset counter 0 to 254 A A The unit is time 881 1000111011 INV board Reset counter 0 to 254 A A 882 0100111011 883 1100111011 884 0010111011 Fan board Reset counte...

Page 264: ...00111 899 1100000111 900 0010000111 901 1010000111 902 0110000111 903 1110000111 904 0001000111 905 1001000111 906 0101000111 907 1101000111 1020 0011111111 1021 1011111111 1022 0111111111 1023 1111111111 Other types of data No SW1 Item Display Unit A B 1 Remarks 1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS 1 A The condition of either OC or OS is displayed individually B The condition of the e...

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