Mitsubishi Electric PURY-100TMU Service Handbook Download Page 39 | Manualshive

Page: 39 / 121

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–38–

YES

NO

YES

NO

YES

NO

Normal operations

Trouble observed

Stop

Start

Breaker

turned on

Set indoor ad-

dress No. to remote

controller

Operation

mode

Error mode

Cooling-only, Heating-only,
Cooling/heating mixed

Error stop

Operation

mode

Operation

mode

52C ON

[3] Operation Flow Chart

(1)

Outdoor unit

Note : 1

For about 3 minutes after turning on power source, address and group information of outdoor unit, BC, controller indoor unit,
and remote controller are retrieved by remote controller, during which “HO” blinks on and off on remote controller. In case
indoor unit is not grouped to remote controller, “HO” display on remote controller continues blinking even after 3 minutes after
turning on power source.

Note : 2

Two trouble modes included indoor unit side trouble, (BC controller trouble) and outdoor unit side trouble. In the case of indoor
unit side trouble, error stop is observed in outdoor unit only when all the indoor units are in trouble. However, if one or more
indoor units are operating normally, outdoor unit shows only LED display without undergoing stop.

Note : 3

Operation mode conforms to mode command by BC controller.

Note : 4

In case BC controller issues cooling/heating mixed operation mode, outdoor unit decides operation mode of cooling-main
operation or heating-main operation.

Note : 3

Note : 2

Note : 1

Fan

“HO” blinks on the remote

controller

1. 52C

OFF

2. Inverter output

0Hz

3. Outdoor fan

Stop

4. All solenoid valve

OFF

Cooling (Cooling-

only) operations

Heating (Heating-

only) operations

Cooling-main

operations

Heating-main

operations

Operation mode command to (BC controller) outdoor unit

Error code blinks on the

outdoor controller board

Error command to

BC controller

Error code blinks on the

remote controller

Cooling/heating mixed

Note : 4

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Summary of Contents for PURY-100TMU

Page 1: ...AIR CONDITIONERS CITY MULTI Models PURY 80TMU 100TMU PURY 80TMU A 100TMU A CMB 104 105 106 108 1010 1013 1016NU F Service Handbook ...

Page 2: ... Flow Chart 38 4 List of Major Component Functions 44 5 Resistance of Temperature Sensor 47 6 REFRIGERANT AMOUNT ADJUSTMENT 48 1 Refrigerant Amount and Operating Characteristics 48 2 Adjustment and Judgement of Refrigerant Amount 48 7 TROUBLESHOOTING 54 1 Principal Parts 54 2 BC Controller Disassembly Procedure 80 3 Self diagnosis and Countermeasures Depending on the Check Code Displayed 86 4 LED ...

Page 3: ...he main unit Warning Use the specified cables for wiring Make the connections securely so that the outside force of the cable is not applied to the terminals Inadequate connection and fastening may generate heat and cause a fire Have all electric work done by a licensed electrician according to Electric Facility Engineering Standard and Interior Wire Regulations and the instructions given in this ...

Page 4: ...arehouse at site or owner s warehouse Storing them outdoors may cause dirt waste or water to infiltrate 2 Pipe sealing before storage Both ends of the pipes should be sealed until immediately before brazing Wrap elbows and T s in plastic bags for storage 1 1 1 1 1 PRECAUTIONS FOR DEVICES ...

Page 5: ...a rainy day 2 Apply non oxide brazing 3 Use a brazing material Bcup 3 which requires no flux when brazing between copper pipes or between a copper pipe and copper coupling 4 If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends of them Reasons 1 A flux generally contains chlorine A residual flux in the refrigerant circuit may generate sludge No...

Page 6: ...p is not properly maintained the degree of vacuum may be too low 2 Required accuracy of the vacuum gauge Use a vacuum gauge that can measure up to 650 Pa 0 094 psi Do not use a general gauge manifold since it cannot measure a vacuum of 650 Pa 0 094 psi 3 Evacuating time Evacuate the equipment for 1 hour after 650 Pa 0 094 psi has been reached After envacuating leave the equipment for 1 hour and ma...

Page 7: ... 6 SV block Fusible plug Accumulator CV block Compressor 4 way valve 2 2 2 2 2 COMPONENT OF EQUIPMENT 1 Appearance of Components In case of A type ...

Page 8: ... 7 Controller Box ...

Page 9: ...1 3 30V 4 6 12V 5 6 5V CN51 Indication distance 3 4 Compressor ON OFF 3 5 Trouble CNRS3 Serial transmission to INV board CN3D CN3S LD1 Service LED SW1 SW2 SWU1 SWU2 SW3 SW4 CNAC3 Power Output 5 L1 3 L3 1 G CN20 Power Input 7 L1 5 L2 3 L3 1 G CNVCC5 Power Source for control 5V ...

Page 10: ...IPM control CNVCC4 Power Output 5V CNL2 Choke coil CNVCC2 Power Output 1 2 30V 1 3 30V 4 6 12V 5 6 5V CNDR2 Output to G A board CNCT CNTH CNRS2 Serial transmission to MAIN board CN52C Control for 52C CNFAN Control for MF1 CNAC2 Power Input 5 L1 3 L3 1 G SW1 ...

Page 11: ... 10 G A board CNIPM1 CN15V1 CNDR1 CNE CNDC1 Power board ...

Page 12: ... 11 BC controller CNTR CN02 M NET transmission CN03 CN12 Power supply 1 EARTH 3 N 5 L SW4 SW2 SW1 SW5 ...

Page 13: ... 12 RELAY 10 board RELAY 4 board ...

Page 14: ... 13 2 Refrigerant Circuit Diagram and Thermal Sensor ...

Page 15: ... 14 3 Electrical Wiring Diagram 1 MC P N ...

Page 16: ...use AC250V 6 3A T F01 Terminal T1 6 CN31 CN30 CN29 SV6B SV6A SV6C SV4A SV4C SV5B SV4B SV5C SV5A CN28 CN27 SV1B SV1A SV1C SV2A SV2C SV3C SV2B SV3B SV3A CONT B TR Terminal block for Transmission TB02 Terminal block for power source TB01 Solenoid valve SV1 6A B C Expansion valve Thermistor sensor Transformer Name Symbol TR TH11 12 15 16 LEV1 3 PS1 3 Pressure sensor CONT B Note 1 TB02 is transmission ...

Page 17: ... 16 3 CMB 108 1010NU F ...

Page 18: ... 17 4 CMB 1013 1016NU F ...

Page 19: ...39 294 71 276 57 1 92 1 92 1 79 1 79 279 279 25 25 107 225 110 230 50 122 47 117 7 45 7 45 10 50 10 50 12 54 12 54 75 167 70 158 26 79 30 86 15 59 15 59 Indoor unit fan notch Refrigerant volume Compressor volts Frequency Outdoor unit Indoor unit BC controller 1 3 Oil return High pressure Low pressure BC controller liquid Intermediate Pressure DB WB Q ty m Ft kg oz V V Hz A Pulse MPa psi C F Condit...

Page 20: ... 1 37 1 67 1 37 249 199 242 199 100 212 95 203 2 28 1 30 1 30 1 30 4 25 2 28 1 30 1 30 45 113 40 104 38 100 40 104 80 176 85 185 208 230 208 230 149 85 149 85 174 100 174 100 27 5 24 9 35 6 32 2 Indoor unit fan notch Refrigerant volume Compressor volts Frequency Outdoor unit total current Indoor unit BC controller 1 3 Oil return High pressure Low pressure BC controller liquid Intermediate Pressure...

Page 21: ...ion information Deletion Disregard errors Start forced defrosting 90 min SW3 2 Function valid All indoor units test operation ON 3 C 27 F 15 C 59 F Valid 53 C 127 F Model 100 C kgf amG Display Before power is turned on During normal operation when power is on Should be set on OFF Before power is turned on Before power is turned on During normal operation when power is on During normal operation wh...

Page 22: ... None None 1st setting Down blow B C Effective Built in remote controller Provided 2500h Effective Thermo ON signal display Always at heat Low speed Set airflow Effective Cool only Provided Provided Provided 2nd setting Horizontal Ineffective Room temp sensor position Clogged filter detect Filter duration OA intake Remote display select Humidifier control Heating thermo OFF airflow Heating thermo ...

Page 23: ...SW4 Setting of DIP SW5 1 2 3 4 ON OFF ON OFF OFF OFF OFF ON ON OFF OFF ON OFF OFF ON ON OFF OFF ON PDFY 10 32 PLFY 12 24 PLFY 32 48 PKFY P 8 PKFY P 12 PDFY 40 48 Model Circuit board used SW4 Phase control Relay selection ...

Page 24: ...re that the crankcase heater has been powered by turning the main power source on at least 12 hours before starting the test run The shorter powering time causes compressor trouble 2 Caution at inverter check Because the inverter power portion in outdoor unit electrical part box have a lot of high voltage portion be sure to follow the instructions shown below During energizing power source never t...

Page 25: ...oling test run mode Check humidifier operations and water supply status in heating test run mode 1 2 3 4 5 Result 1 2 3 Work Disassembling and assembling of drain water lifting up mechanism Mounting of float switch Electric wiring Float switch moves smoothly Float switch is mounted on mounting board straight without deformation Float switch does not contact the copper pipe Wiring procedure is exac...

Page 26: ...n of outdoor unit and indoor unit followed Maximum number of indoor units which can be connected connecting model name and total capacity Follow limitation of refrigerant piping length For example 70m 229ft or less total length 220m 721ft at the farthest Connecting piping size of branch piping correct Refrigerant piping diameter correct Refrigerant leak generated at connection Insulation work for ...

Page 27: ... not be properly set with power source turned on Not operate Set temperature not obtained at heating operations Thermostat stop is difficult Error stop Error stop compressor trouble 1 2 1 2 3 4 Address setting properly done M NET Remote controller indoor unit and outdoor unit Setting of address No done when shutting off power source Address numbers not duplicated Turned on SW3 8 on indoor unit cir...

Page 28: ... normally 8 Make sure that interlocking devices such as ventilator operate normally if any 9 Press button to cancel test run Stop operation Note 1 If check code is displayed on remote controller or remote controller does not operate normally 2 Test run automatically stops operating after two hours by activation of timer set to two hours 3 During test run test run remaining time is displayed on tim...

Page 29: ...tify the content of group and interlocked connection information registered This button is used to retrieve identify the content of group and interlocked connection information registered This button selects the case to register indoor units as group group setting mode or that as interlocked interlocked setting mode The unit address is shown at one spot for the group setting mode while at two spot...

Page 30: ...registration information of indoor units The address of the registered indoor units in group is retrieved identified 3 Retrieval identification of registration information The connection information of any unit indoor outdoor units remote controller or the like is retrieved identified 4 Deletion of group registration information of indoor units The registration of the indoor units under group regi...

Page 31: ... registration press the FILTER LOUVER button A B at the same time for 2 seconds to change to the original ordinary mode with the remote controller under stopping Remote controller under stopping HO under displaying Ordinary mode INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C ERROR CODE OAUNITADDRESSNO C 1 1 Group setting mode Confirm the ind...

Page 32: ...ayed Operation procedure 1 With the remote controller under stopping or at the display of HO continuously press the FILTER LOUVER button A B at the same time for 2 seconds to change to the registration mode 2 Operate MODE button G for the interlocked setting mode See figure below 3 Assign the unit address of which registration information is desired to confirm with the TIMER SET switch H Then pres...

Page 33: ...the same time for 2 seconds to change to the original ordinary mode with the remote controller under stopping ERROR CODE OAUNITADDRESSNO C INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C 1 Set the address 2 Press the switch for confirmation E Registered No registration Same display will appear when the unit of 007 is not existing 1 Press the ...

Page 34: ...e address to be deleted See the figure below As the error display on the remote controller is usually transmitted from the indoor unit OA UNIT ADDRESS No is used as the address of the indoor unit 4 Press the CLOCK ON OFF TIMER button F twice See the figure below 5 After completing the deletion continuously press the FILTER LOUVER button A B at the same time for 2 seconds to return to the original ...

Page 35: ...seconds SV2 ON Open OFF Close When starting compressor After thermost ON is returned and after 3 minutes restart When compressor stops in cooling or heating mode After operation stops During defrosting operations During oil recovery operations During 20Hz operations at fall in low pressure or low pressure saturation tempera ture 3minutes or more after starting When high pressure rises Pd When high...

Page 36: ...rature is 130 C 266 F 4 Periodical frequency control Frequency controll is periodically performed except for the frequency controls at operation start status change and protection 1 Cycle of periodical frequency control Periodical frequency control is performed every minute after the time specified below has passed 20 sec after starting compressor or finishing defrostoing operations 20 sec after f...

Page 37: ...tions the defrosting operations stop and defrosting prohibition time decided by integrated operation time of compressor is set to be 20 minutes 5 Change in number of operating indoor units during defrosting operations In case number of operating indoor units changes during defrosting operations the defrosting operations continue and control of unit number change is performed after the defrosting o...

Page 38: ...use of rise in liquid side pressure PS1 Liquid level control 3 Differential pressure control 2 60 Differential Pressure control 2 2 Control of BC Controller 1 Control of SVA SVB and SVC SVA SVB and SVC are turned on and off depending on connection mode Cooling Heating Stop Defrost SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF 2 Control of LEV LEV opening sj is controlled corresponding t...

Page 39: ...er trouble and outdoor unit side trouble In the case of indoor unit side trouble error stop is observed in outdoor unit only when all the indoor units are in trouble However if one or more indoor units are operating normally outdoor unit shows only LED display without undergoing stop Note 3 Operation mode conforms to mode command by BC controller Note 4 In case BC controller issues cooling heating...

Page 40: ...rmal operations Trouble observed Stop Solenoid valve OFF LEV fully closed Start Breaker turned on Operation command 1 Operation mode judgement cooling only heating only cooling heating mixed 2 Transmission to outdoor unit Receiving operation mode command from outdoor unit Error mode Cooling only operations Heating only operations Cooling main operations Heating main operations Operation mode Opera...

Page 41: ...tions Cooling operations Prohibition Prohibition Cooling heating automatic operations Dry operation Fan operations Prohibition Remote controller blinking Note 3 Note 3 Note 3 Note 1 Note 2 Note 1 Note 1 Indoor unit LEV fully closed Opening 41 Note 2 Two error modes include indoor unit trouble BC controller trouble and outdoor unit side trouble In the case of indoor unit trouble error stop is obser...

Page 42: ...ller solenoid valve OFF 6 BC controller LEV fully closed 1 Inverter frequency control 2 Indoor unit LEV oil return LEV control 3 Solenoid valve control 4 Outdoor unit fan control 5 BC controller solenoid valve control 6 BC controller LEV control Cooling operation 4 way valve OFF Indoor unit fan operations Test run start Thermostat ON Normal operations Test run Stop 3 minute restart prevention ...

Page 43: ...ed 4 Solenoid valve control 5 Outdoor unit fan stop 6 BC controller solenoid valve control 7 BC controller LEV control Heating operation 4 way valve ON Defrosting operation Test run start 4 way valve OFF Thermostat ON 3 minute restart prevention Note 1 When outdoor unit starts defrosting it transmits defrost operations command to BC controller and indoor unit and the indoor unit starts defrosting ...

Page 44: ...d with compressor low speed OFF operations Dry operations 4 way valve OFF Inlet temp 18 C 64 F Note 2 Thermostat ON Test run start Note 1 Note 1 When indoor unit inlet temperature exceeds 18 C 64 4 F outdoor unit compressor and indoor unit fan start intermittent operations synchronously Operations of outdoor unit BC controller indoor unit LEV and solenoid valve accompanying compressor are the same...

Page 45: ...n 1 Detects low pressure 2 Calculates the refrigerant circulation configuration 3 Protects the low pressure 1 High pressure detection 2 High pressure protection 1 Discharge temperature detection 2 High pressure protection 20 C 68 F 250kΩ 70 C 158 F 34kΩ 30 C 86 F 160kΩ 80 C 176 F 24kΩ 40 C 104 F 104kΩ 90 C 194 F 17 5kΩ 50 C 122 F 70kΩ 100 C 212 F 13 0kΩ 60 C 140 F 48kΩ 110 C 230 F 9 8kΩ 1 Frequenc...

Page 46: ...2 Adjust subcool of indoor unit heat exchanger at heating Indoor unit control thermostat 1 Indoor unit control freeze prevention hot adjust etc 2 LEV control in heating operation Subcool detec tion LEV control in cooling operation Superheat detector R50 17kΩ B25 50 4170 Rt 17exp 4170 20 C 4 F 605 0kΩ 10 C 14 F 323 3kΩ 0 C 32 F 180 9kΩ 10 C 50 F 105 4kΩ 20 C 68 F 63 8kΩ 30 C 86 F 39 9kΩ 40 C 104 F ...

Page 47: ...0 15kΩ B0 100 3460 Rt 15exp 3460 0 C 32 F 15kΩ 10 C 50 F 9 7kΩ 20 C 68 F 6 4kΩ 25 C 77 F 5 3kΩ 30 C 86 F 4 3kΩ 40 C 104 F 3 1kΩ Continuity check by a tester Same as LEV of indoor unit 1 273 0 AC 208 230V Open when energized Closed when de energized 12V DC stepping motor drive 0 to 2000 valve opening pulse Supplies refrigerant to cooling indoor unit Supplies refrigerant to heating indoor unit Suppl...

Page 48: ...p 3460 Rt 7 465exp 4057 F C 32 F C 32 Thermistor Ro 33kΩ 1 TH2 Thermistor R50 17kΩ 2 THHS Rt 33exp 3965 Rt 17exp 4170 F C 32 F C 32 1 273 tc 1 273 tc 1 273 tc 1 273 tc 1 273 50 Temperature C F Temperature C F Temperature C F Temperature C F Resistance kΩ Resistance kΩ Resistance kΩ Resistance kΩ 1 273 0 1 273 120 1 273 0 9 5 9 5 9 5 9 5 ...

Page 49: ...10 18 degrees or less 2 Adjustment and Judgement of Refrigerant Amount 1 Symptom The symptoms shown in the table below are the signs of excess or lack of refrigerant amount Be sure to adjust the amount of refrigerant in refrigerant amount adjustment mode by checking operation status judging refrigerant amount and performing selfdiagnosis with LED Dip s w 1 1 10 for overall judgement of excess or l...

Page 50: ...e be sure that the unit is in the operating condition and carry out refrigerant volume judgment and self diagnosis by the LED s judging overall whether the volume of refrigerant is in excess or is insufficient Perform adjustments by running the unit in the refrigerant volume adjustment mode 2 Refrigerant Volume a Checking the Operating Condition Operate all the indoor units on cooling or on heatin...

Page 51: ...e carry out additional charging on site Outdoor Unit Model Name PURY 80TMU A PURY 100TMU A Refrigerant Charge Volume 10 0kg 11 0kg 22lb 1oz 26lb 8oz Calculation Formula Calculate the additional refrigerant volume by calculating the size of the extension liquid piping and its length units m ft Additional Refrigerant Volume kg 0 16 L1 0 06 L2 0 024 L3 A oz 1 72 L1 0 65 L2 0 20 L3 A L1 Length of ø12 ...

Page 52: ...t performed in the cooling mode must be done with a gauge reading of 1 27MPa 184 8psi or higher If the pressure does not reach this guage reading the refrigerant cannot be collected halfway Therefore collect used refrigerant and evacuate the unit completely and then fill new refrigerant up to a specified quantity Notes 3 Judgment by the AL is at best only a rough guideline Please do not add refrig...

Page 53: ...y little from the low pressure side service port Note 1 As the refrigerant volume can not be adjusted in the heating mode retrieve the refrigerant evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season 5deg SC11 10 18 SC16 30 54 deg 30 54 deg SC16 TH1 110 C 230 F Fill refrigerant little by little from the low pressure...

Page 54: ...charge from low pressure circuit only after finishing evacuation closing vacuum pump valve shutting off high pressure circuit of system analyzer and opening valve of refrigerant cylinder In case service port of ball valve and charge plug can not be joined as shown in the figure use two vacuum pumps and evacuate high pressure side and low pressure side circuits separately Note 1 Though refrigerant ...

Page 55: ...rence between the two pressures exceeds 0 098MPa 14 2 psi the affected pressure sensor is faulty deteriorating performance c If the pressure reading in the LD1 display does not change the affected pressure sensor is faulty 3 Disconnect the pressure sensor from the MAIN board and check the pressure according to the LD1 display a If the pressure is 0 0 098MPa 0 14 2 psi on the LD1 display the affect...

Page 56: ...Conditions during operation See Control of Outdoor Unit b Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant 3 SV3 6 Control of heat exchanger capacity a Operations can be confirmed by LED display and operating sound of solenoid valve because one or more of SV3 5 are turned on depending on condit...

Page 57: ...he Refrigerant Circuit Diagram And ON OFF of Solenoid valve is depends on the amount of running indoor units ambient temperature and so on So please check by LED Monitor Display If the SV coil is taken off then it is possible to open caps and check plungers But the special tool which is on the Service Parts List is needed Closed torque 13kg m 1 3N m 0 958lbFFt 1 25 32 ...

Page 58: ...ratures of the indoor units by the operation monitor through the heat source unit s control board When the fan is running the linear expansion valve is fully closed so if there is leakage the temperature sensed by the thermistor liquid pipe temperature sensor will become low If the temperature is considerably low compared to the remote control s intake temperature display it can be judged that the...

Page 59: ...body will not move then pull out the coils toward the top If they catch on the stopper and are difficult to take out turn the coils left and right until the stoppers are free from the stopper indentations then pull the coils out If you take out the coils only without gripping the body undue force will be applied to the piping and the pipe may be bent over so be sure to fasten the body in such a wa...

Page 60: ...d on ON OFF of the SV3 4 5 and 6 Please confirm by LED monitor display You can open the cap of valve A B and C but 3 types of hexagon socket screw keys The size is as follows Closed torque A 1 7kg m 0 17N m 0 125lbFFt B 20kg m 2 0N m 1 47lbFFt C 13kg m 1 3N m 0 96lbFFt 1mm 0 04 ...

Page 61: ...shooting of IPM should satisfy the following conditions Internal voltage 1 5V Power source one dry cell battery Central value of resistance range 10 40Ω The measured values for troubleshooting are shown in the table below Use the minimum range for tester resistance range Diode stack Perform continuity check with tester Judged as normal if the following characteristics are observed Use the minimum ...

Page 62: ...ntroller board 3 Blown fuse on indoor controller board 4 Faulty or disconnected transformer of indoor unit 5 Faulty indoor controller board 2 Faulty outdoor control circuit board As normal transmission fails between indoor and outdoor units outdoor unit model can not be recognized Checking method countermeasure a Check transmission terminal block of remote controller for voltage i In case of 17 30...

Page 63: ...oller 13 Disconnection of centralized control transmission line TB7 at outdoor unit 14 At system connected with MELANS power supply connector CN40 is inserted to centralized control transmission line of outdoor unit Checking method countermeasure In case MELANS is not used In case with MELANS used When MELANS is used HO display on the remote controller will disappear at the group registration of t...

Page 64: ...egistration and confirmation 1 Erroneous address of unit to be coupled 2 Disconnection of transmission line of unit to be coupled No connection 3 Faulty circuit board of unit to be coupled 4 Installation miss of transmission line Confirmation of different refrigerant system controller 5 Disconnection of power source of outdoor unit to be confirmed 6 Disconnection of centralized control transmissio...

Page 65: ...al block TB1 DC24 30 V Except the above mentioned Connector disconnected Except the above mentioned DC24 30 V Except the above mentioned DC24 30 V Except the above mentioned 0 5 2 5Ω Except the above mentioned DC265 357 V Except the above mentioned 0Ω Except the above mentioned 20 24Ω Except the above mentioned refer to Judging Diode stack Failure Except the above mentioned AC187 253 V Except the ...

Page 66: ... to the entry of fine noise Transmission can be made normally but reply ACK or answer can not be issued normally due to noise 2 Method to confirm wave shape Check the wave shape of transmission line with an oscilloscope to confirm that the following conditions are being satisfied 1 The figure should be 104μs bit 1 2 No finer wave shape noise than the transmission signal 52μs 1 should be allowed 1 ...

Page 67: ...point earthing should be made at outdoor unit Without earthing transmission signal may be changed as the noise on the transmission line has no way to escape For the shield earth of the transmission line for centralized control the effect of noise can be minimized if it is from one of the outdoor units in case of the group operation with different refrigerant systems and from the upper rank control...

Page 68: ...measuring device for business frequencies is used a rectified voltage meter with a symbol be used Correct measurement values cannot be obtained with an ordinary portable tester either analog or digital 1 If it was kept on for 12 hours or longer as specified 2 It was kept on for less than the specified period 1 The compressor stops and the same error code is displayed 1 The Inverter stops and the s...

Page 69: ...ng of diode stack b IPM Refer to Troubleshooting of IPM c Rush current protection resistor d Electromagnetic contactor e DC reactor For c e refer to Individual Parts Failure Judge ment Methods a As there is a possibility of instantaneous short circuit generated find the mark of the short circuit for repair b When a is not applicable the compressor may be faulty The ground fault of inverter output ...

Page 70: ...oard together at the same time However if the G A board is damaged judge that the IPM is faulty then judge whether replacement is necessary or not 2 Fully check wiring for loose and incorrect connections The incorrect or loose connection of the power circuit part wiring like IPM and diode module causes damage to the IPM Therefore check the wiring fully As the insufficient tightening of screws is d...

Page 71: ... 70 Motor Compressor G A board Red U V W N P White Blue Blue Capacitor C1 Red IPM ...

Page 72: ...re sensor OK Replace the wrong puressure sensor with the correct pressure sensor and confirm it s detected pres sure is indicated correctly Short connectors 2 and 3 on the board and check the pressure Pressure range within 0 to 0 098MPa 14 2psi Pressure of at least 3 14MPa 455psi indicated Remove the pressure sensor connector from the board and check the pressure Check for faulty connector on appl...

Page 73: ...ooling only Cooling principal Heating only Heating principal Normal Insufficient cooling SC11 large SC16 small PHM 0 SC11 large SC16 small PHM 0 Warm indoor SC small When SV opens some noise produced SC11 small SC16 small PHM 0 Insufficient heating WarmindoorSCsmall WhenSVopenssome noise produced Measured Data High pressure of outdoor Low pressure of outdoor BC controller pressure liquid measureme...

Page 74: ...k thermistor resistance value Compare temperature for thermistor resistance value with actual mea sured valued No difference Insert applicable thermistor connector into board and check sensor input temperature on LED monitor for differ ence No difference No abnormality Change thermistor Check for connection problem Change the controller board Note 5 Yes No No Yes Note 4 Note 2 Note 1 Note 3 ...

Page 75: ...4 Check using LED monitor display switch outdoor MAIN board SW1 Measured Data Signal SW1 Setting Remarks Liquid inlet temperature TH11 See converter Bypass outlet temperature TH12 See converter Bypass outlet temperature TH15 See converter Bypass inlet temperature TH16 See converter Touch the probes of the tester or other instrument to the shaded areas to measure Resistance value kΩ Temperature C F...

Page 76: ...V 1 fully open LEV3 are not controlled Check if LEV 1 are fully shut Yes Note 2 No Yes No Yes No Yes Check if LEV3 is controlled by superheat LEV3 is not controlled Check if SVA SVC are ON SVA SVC ON Check if SVB is OFF SVB OFF Check if LEV 3 are controlled by differential pressure Completion Check SVB Check SVA SVC Check LEV3 Correct the problem Check LEV1 SVB ON Check if SVB is ON SVA SVC OFF Ch...

Page 77: ...ange LEV No 1 3 Cooling only Cooling main Heating only Heating main 1 1 3 Normal 2 3 1 Insufficient cooling SH12 small SC11 small SC16 small Branch piping SC small Insufficient cooling insuf ficient heating SH12 small SC11 small SC16 large Branch piping SC small PHM large Heating indoor SC small PHM large Insufficient cooling Heating indoor SC small PHM large Small Large Small Large High pressure ...

Page 78: ...oller board Remove connectors from the board and use a tester to check conduction Check between connectors 1 3 5 and 2 4 6 Use a tester to measure resistance between each coil red white red orange brown yellow brown blue Correct value is 150Ω 10 Adjust repair Check for the following LEV full open ticking sound LEV full closed no sound Change LEV OK Confirm if LEV is closed fully Attach check LEDs ...

Page 79: ...n and connector disconnection or looseness No problem Operate cooler and heater for the applicable solenoid valve s refrigerant system only Clicking noise produced when working timing Measure piping temperature on both sides of solenoid valve and check for following Solenoid valve ON no differential Solenoid valve OFF differential Solenoid valve normal OK Measure pipe temperature of inlet and outl...

Page 80: ...ture of piping on either side of SVA 1 A Measure temperature of piping on either side of SVB 1 B 4 BC controller transformer Cooling Heating Stopped Defrosting SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF Mode Branch port Normal Malfunction CNTR 1 3 Approximately 90Ω Open or shorted CN03 1 3 Approximately 1 7Ω Disconnect the connector before measurement CNTR CN03 BC Controller control ...

Page 81: ...g the front panel and then remove the panel Two of the screws are not visible until you remove the electric panel box 3 Remove the two screws securing the ceiling panel Next lifting up on the panel slightly slide it inwards and then remove it The inside of the ceiling panel is hooked on a pin 4 Remove the single screw that secures the side panel and then remove the panel Celling panel Celling pane...

Page 82: ...he screw se curing the inner cover provides access for checking the entire controller board 3 Note the following precautions whenever replacing the controller board 1 Take care to avoid mistakes when connecting leads and connectors and double check for in complete and loose connections 2 Check to make sure that DIP switch settings are the same before and after replacement Important You do not need...

Page 83: ...sor lead securely to the controller board 4 Pressure Sensor Procedure Photos 1 Remove the sensor panel 1 Use the procedure under 1 1 2 to check PS1 and PS3 2 Disconnect the connector of the applicable pressure sensor from the controller board and insulate the connector 1 Liquid pressure sensor CNP1 2 Intermediate pressure sensor CNP3 3 Install a new pressure sensor at the location shown in the pho...

Page 84: ... it 4 When the solenoid valve is defective remove the unit front panel disassemble the solenoid valve block and check the interior of the valve When disassembly space or footing for disassem bly of the solenoid valve block in the vicinity of the flow controller is not available the unit can be lowered from the ceiling to perform the work 1 To view the interior of a valve use a torque wrench to ope...

Page 85: ...y 4116 Fan speed abnormality motor abnormality 4200 VDC sensor circuit abnormality 4220 Bus voltage abnormality 4230 Radiator panel overheat protection 4240 Over load protection 4250 IPM Alarm output Bus voltage abnormality Over Current Protection 4260 Cooling fan abnormality Air inlet TH21 IC 5101 Discharge TH1 OC Liquid pipe TH22 IC 5102 Thermal sensor Low pressure saturation TH2 OC abnormality ...

Page 86: ...1205 Preliminary liquid pipe temperature sensor abnormality TH5 1211 Preliminary low pressure saturation abnormality or preliminary low pressure saturation sensor abnormality TH2 1214 Preliminary THHS sensor circuit abnormality 1216 Preliminary heat exchanger inlet pipe thermal sensor abnormality TH7 1221 Preliminary ambient temperature thermal sensor abnormality TH6 1402 Preliminary high pressure...

Page 87: ...both ends of fuse is replace the fuse If none of the items in 1 to 3 is appli cable and if the trouble reappears even after the power is switched on again replace the circuit board by the follow ing procedure when replacing the cir cuit board be sure to connect all the connectors ground wires etc se curely 1 If serial transmission is restored af ter the INV board only is replaced then the INV boar...

Page 88: ...Check address setting of indoor unit connection Confirm that ball valve is fully opened Check outdoor fan See Trouble check of outdoor fan Check operation status of cooling only or heating only See Trouble check of solenoid valve Check resistance of thermistor Check inlet temperature of sensor with LED monitor 1 Gas leak gas shortage 2 Overload operations 3 Poor operations of indoor LEV 4 Poor ope...

Page 89: ...nly heating principal LEV3 Defrost LEV3 3 Poor operations of BC controller SVM Cooling only defrost 4 Poor operations of BC controller SVA Cooling only cooling main 5 Poor operations of BC controller SVB Heating only heating main 6 Solenoid valve SV 3 6 trouble Cooling only cooling main 7 Setting error of connection address 8 Poor operations of ball valve 9 Short cycle of indoor unit 10 Clogging o...

Page 90: ...indoor unit filter 11 Fall in air volume caused by dust on indoor unit fan 12 Dust on indoor unit heat exchanger 13 Indoor unit fan block motor trouble 9 13 Rise in high pressure caused by lowered condensing capacity in heating only and heating principal operation 14 Short cycle of outdoor unit 15 Dust on outdoor unit heat ex changer 16 Outdoor unit fan block motor trou ble poor operations of fan ...

Page 91: ...perature rises again as above within 2 hours after the out door unit is stopped it becomes the first detection again and operation is the same as in 1 above 4 The 2 hour period after the outdoor unit stops is the abnormal delay pe riod and LED display is carried out during the abnormal stop delay Overcharged refrigerant abnormality Lacked refrigerant abnormal ity 1 Excessive refrigerant charge 2 T...

Page 92: ...idifier or the like in trouble 1 Drain sensor sinks in water be cause drain water level rises due to drain water lifting up mechanism trouble 2 Broken wire of indirect heater of drain sensor 3 Detecting circuit circuit board trouble 1 Thermistor trouble 2 Poor contact of connector insufficient insertion 3 Full broken of half broken ther mistor wire 4 Indoor unit circuit board detecting circuit tro...

Page 93: ...connections a Check if a wire is disconnected b Check the voltage between each of the wires Check 1 the connections 2 the con tact at the connector 3 the tightening torque at screw tightening locations and 4 for wiring disconnections TB1 CN20 Refer to the circuit number and the wir ing diagram plate If F01 or F02 on the MAIN board is melted Resistance between both ends of the fuse is replace the f...

Page 94: ...4 The electromagnetic contactor 52C is defective 5 The diode stack DS is defective 6 The reactor DCL is defective 7 The INV board is defective Confirm slipping off of connector CN33 on indoor controller board Confirm slipping off of connector FAN1 on indoor power board Check wiring for disconnection Check filter Check indoor fan motor When aboves have no trouble 1 For trouble after operating fan R...

Page 95: ...e IPM and the compressor Check the compressor s insulation resistance Check the IPM Judge that the IPM is fauly Go to Individual Parts Failure Judgment Methods If none of the items in 1 to 8 is applicable and if the trouble reappears even after the power is switched on again replace the circuit board by following procedure when re placing the circuit board be sure to connect all the connec tors gr...

Page 96: ...nit s exhaust short cycling Clean the heat exchanger If the power supply voltage is less than 187 V it is outside specifications Iftheexternalairtemperatureisover43 C 109 F it is outside the specifications Is the indoor unit capacity total cor rect Are the outdoor indoor unit capac ity settings correct To judge failure of the solenoid valve go to Individual Parts Failure Judg ment Methods for the ...

Page 97: ...ate section TH16 Thermal sensor abnormality Outdoor Unit 1 Same as 4230 1 Thermistor 2 Lead wires are being pinched 3 Insulation is torn 4 A connector pin is missing or there is faulty contact 5 A wire is disconnected 6 The thermistor input circuit on the MAIN circuit board is faulty In the case of the THHS replace the INV board 1 Thermistor trouble 2 Biting of lead wire 3 Broken cover 4 Coming of...

Page 98: ...er pressure drop due to a leak age 3 Broken cover 4 Coming off of pin at connector por tion poor contact 5 Broken wire 6 Faulty thermistor input circuit of MAIN board 1 Pressure sensor trouble 2 Inner pressure drop due to gas leak 3 Broken cover 4 Coming off of pin at connector por tion poor contact 5 Broken wire 6 Faulty pressure sensor input circuit of control board 1 Contact is faulty 2 The cur...

Page 99: ...inuing operation over 5 minutes The transmission wave shape noise on the transmission line should be investigated in ac cordance with Investigation method of trans mission wave shape noise 1 Two or more controllers of outdoor unit indoor unit remote controller BC controller etc have the same address 2 In the case that signal has changed due to noise entered into the trans mission signal 1 At the c...

Page 100: ...hecking code 6602 6603 Meaning detecting method Cause Checking method Countermeasure Transmission line installed while turning power source on Check power source of indoor unit 208V 230V Shut off the power source of outdoor in door units BC controller and make it again Erroneous power source work Erroneous transmis sion work Check transmission line work and shield finish Ground fault or shield con...

Page 101: ... error Communication trouble between apparatus processor and trans mission processor Note The address attribute shown on remote controller indicates the controller which has detected error Turn off power sources of indoor unit BC controller and outdoor unit When power sources are turned off sepa rately microcomputer is not reset and nor mal operations can not be restored Controller trouble is the ...

Page 102: ...r modified during operation 2 Faulty or disconnection of transmission wir ing of BC controller 3 Disconnection of BC unit connector CN02 4 Faulty BC controller circuit board 1 When IC unit address is changed or modified during operation 2 Faulty or disconnection of transmission wir ing of IC 3 Slipping off of IC unit connector CN2M 4 Faulty IC unit controller 5 Faulty remote controller 1 Faulty tr...

Page 103: ... be consider ed Total capacity error 7100 Capacity code setting error 7101 Connecting set number error 7102 Address setting error 7105 1 Cause of 1 3 of Cause for single refri gerant system 2 Disconnection or short circuit of transmission line of OC terminal block for centralized con trol TB7 3 Shut down of OC unit power source of one refrigerant system 4 Neglecting insertion of OC unit power supp...

Page 104: ...ertion of power supply connector CN40 into OC unit transmission line for centralized control 3 Disconnection or power source shut down of power supply unit for transmission line 4 Faulty system controller MELANS Same cause as that for plural refrigerant system Trouble of partial IC units 1 Same cause of that for single refrigerant sys tem Trouble of all IC in one refrigerant system 1 Error detecte...

Page 105: ... of or power shutdown of power supply unit for transmission line 4 Faulty MELANS 1 IC unit is keeping the memory of the original group setting with RC although the RC ad dress was changed later The same symptom will appear for the regis tration with SC 2 IC unit is keeping the memory of the original interlocking registration with Fresh Master with RC although the Fresh Master address was changed l...

Page 106: ...ion line of the remote control 6 Circuit failure of the remote control transmit receive of the indoor units 7 Circuit failure of the remote control transmit receive 1 Poor contact of the remote control line of the MA remote control or the indoor units 2 Set up over two units of the master remote control 3 Set up duplication of the indoor unit address 4 Noise intrusion onto the remote control line ...

Page 107: ...nit a Check for the model total capacity cord total of indoor units connected b Check whether indoor unit capacity code SW2 is wrongly set For erroneous switch setting modify it turn off power source of outdoor unit and indoor unit simultaneously for 5 minutes or more to modify the switch for setting the model name capacity coad Check for the model selector switch Dip switches SW3 10 on outdoor un...

Page 108: ...nt 96 or more Four connection joint 128 or more 2 Four or more indoor units are set for the same connection 3 The smallest connection No has not been set when used at joint 1 In case when the old type remote controller for M NET is used and the remote controller sensor is de signed on indoor unit SW1 1 turned ON a Check for the model total capacity code total of indoor units connected Check that t...

Page 109: ... Solenoid valve THHS Inverter radiator panel IC Indoor unit LEV Electronic expansion valve COMP Compressor SW1 Outdoor unit control circuit board E Memory storage for service activities sampling per minute 7 seg LED The numerical display includes that of pressure temperature or the like while the graphic display includes that of operating condition solenoid valve ON OFF state or the like Numerical...

Page 110: ...st Heating only Refrigerant Recovery Discharge Tempera ture Error Comp tempera ture Error LD1 Error SV1 night mode Com pressor operating Unit No 4 Unit No 12 Unit No 4 Unit No 12 Unit No 4 Unit No 12 Heat ing only OFF Cooling only Heating main Refrigerant Recovery Overcurrent Protection LD2 Error SV2 Prelimi nary Error Unit No 5 Unit No 13 Unit No 5 Unit No 13 Unit No 5 Unit No 13 Mixed ON Cooling...

Page 111: ...ata LD1 Data LD2 Data TH5 Data TH6 Data High Pressure Error 1 2 Suction pressure Error TH1 Error TH7 Error Low Pressure Error Configuration Detection Error Discharge Tempera ture Error Comp tempera ture Error LD1 Error Overcur rent Protection LD2 Error Heat Sink Thermostat Operation TH5 Error Overcur rent Break TH6 Error HPS Error Over charged Refrigerant THHS Error 0 9999 Inverter Error Detail 1 ...

Page 112: ...Toff INV Output Current IAC OC Address IC1 Address Capacity Code IC2 Address Capacity Code IC3 Address Capacity Code IC4 Address Capacity Code IC5 Address Capacity Code IC6 Address Capacity Code 99 9 999 9 99 9 999 9 Accumulator Level 0 9 AL is also displayed Δ Hz Low 3 C 5 4 F or lower Low 3 C 5 4 F or lower Δ Hz 0 Low 3 2 C 5 4 3 6 F Low 3 2 C 5 4 3 6 F Δ Hz Low 2 1 C 3 6 1 8 F Low 2 1 C 3 6 1 8...

Page 113: ...ity Code IC12 Address Capacity Code IC13 Address Capacity Code IC14 Address Capacity Code IC15 Address Capacity Code IC16 Address Capacity Code COMP Operation Time Higher order 4 digits Lower order 4 digits Outdoor Unit Operation Mode Outdoor Unit Control Mode Relay Output Display 1 Lighting Display TH1 Data LD1 Data LD2 Data TH5 Data TH6 Data HPS Data THHS Data TH7 Data LPS Data 0 99 0 99 0 9999 ...

Page 114: ...elay out put Display2 lighting Display DC Trunk Line Current Outdoor Unit Operation Display BC All Indoor Unit Mode Elapsed Time for CS Circuit Closed Detection BC TH 11 Data IBC TH 12 Data BC TH 15 Data BC TH 16 Data BC P1 Data BC P3 Data BC SC 11 Data BC SH 12 Data BC SC 16 Data 99 9 999 9 0 9999 99 9 999 9 3 minute Re startprotection mode Heating only ON SV6 Warm up mode Cooling only OFF Compre...

Page 115: ...0100 BC LEV 1 Data BC LEV 3 Data IC1 liquid Pipe Temperature IC2 liquid Pipe Temperature IC3 liquid Pipe Temperature IC4 liquid Pipe Temperature IC5 liquid Pipe Temperature IC6 liquid Pipe Temperature IC7 liquid Pipe Temperature IC8 liquid Pipe Temperature IC9 liquid Pipe Temperature IC10 liquid Pipe Temperature IC11 liquid Pipe Temperature IC12 liquid Pipe Temperature IC13 liquid Pipe Temperature...

Page 116: ...0100 1001110100 0101110100 1101110100 0011110100 1011110100 0111110100 1111110100 0000001100 1000001100 0100001100 1100001100 0010001100 1010001100 0110001100 1110001100 IC7 Gas Pipe Temperature IC8 Gas Pipe Temperature IC9 Gas Pipe Temperature IC10 Gas Pipe Temperature IC11 Gas Pipe Temperature IC12 Gas Pipe Temperature IC13 Gas Pipe Temperature IC14 Gas Pipe Temperature IC15 Gas Pipe Temperature...

Page 117: ... SC IC14 SC IC15 SC IC16 SC IC1 LEV Opening pulse IC2 LEV Opening pulse IC3 LEV Opening pulse IC4 LEV Opening pulse IC5 LEV Opening pulse IC6 LEV Opening pulse IC7 LEV Opening pulse IC8 LEV Opening pulse IC9 LEV Opening pulse IC10 LEV Opening pulse IC11 LEV Opening pulse IC12 LEV Opening pulse IC13 LEV Opening pulse IC14 LEV Opening pulse IC15 LEV Opening pulse IC16 LEV Opening pulse IC1 Operation...

Page 118: ... Number IC7 Operation Mode Branch Number IC8 Operation Mode Branch Number IC9 Operation Mode Branch Number IC10 Operation Mode Branch Number IC11 Operation Mode Branch Number IC12 Operation Mode Branch Number IC13 Operation Mode Branch Number IC14 Operation Mode Branch Number IC15 Operation Mode Branch Number IC16 Operation Mode Branch Number IC1 Filter IC2 Filter IC3 Filter IC4 Filter IC5 Filter ...

Page 119: ...tion 2 Location of leaks Outdoor unit Cooling mode 1 Test run all indoor units in cooling mode 1 With SW3 1 on the MAIN board of the outdoor unit set to ON and SW3 2 OFF ON to test run all indoor units 2 Change the remote controller settings so that all indoor units run in cooling mode 3 Check that all indoor units are running in cooling mode 2 Check the Tc and SC16 data The LED monitor switch SW1...

Page 120: ...extension piping or the indoor units Reclaim the refrigerant do not discharge it into the air 5 Repair the leaks 6 After the leaks are repaired extract all air from the extension piping and the indoor units to create a vacuum Then open both ball valves BV1 and BV2 then adjust the refrigerant amount and verify that the refrigerant is circulating properly 4 Location of leaks Outdoor unit when heatin...

Page 121: ... 100TMU A CMB 104 105 106 108 1010 1013 1016NU F HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN New publication effective Dec 2005 Specifications subject to change without notice Issued in Dec 2005 HWE05220 Printed in Japan ...

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