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Mitsubishi City Multi P500YEM-A Service Handbook Download Page 1

AIR CONDITIONERS CITY MULTI

Models

PURY-P400, P500YEM-A

Service Handbook

Service Handbook PURY-P400, P500YEM-A

New publication effective Mar. 2004

Specifications subject to change without notice.

Service Handbook PURY-P400, P500YEM-A

Issued in 2004 Mar. MEE03K208
Printed in Japan

HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Summary of Contents for City Multi P500YEM-A

Page 1: ...Handbook PURY P400 P500YEM A New publication effective Mar 2004 Specifications subject to change without notice Service Handbook PURY P400 P500YEM A Issued in 2004 Mar MEE03K208 Printed in Japan HEAD...

Page 2: ...Chart 50 4 List of Major Component Functions 56 5 Resistance of Temperature Sensor 59 6 REFRIGERANT AMOUNT ADJUSTMENT 60 1 Operating Characteristics and Refrigerant Amount 60 2 Adjustment and Judgeme...

Page 3: ...xed to the 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 fastenin...

Page 4: ...tc is used the chlorine in the refrigerant may cause the refrigerator oil to de teriorate Use a vacuum pump with a reverse flow check valve If other types of valves are used the vacuum pump oil may fl...

Page 5: ...es should be sealed until immediately before brazing Wrap elbows and T s in plastic bags for storage The new refrigerator oil is ten times more hygroscopic than the conventional refrigerator oil such...

Page 6: ...copic and may introduce water inside Notes Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure Do not use oils other than ester oil ether oil o...

Page 7: ...ing the sections 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...

Page 8: ...the refrigerant circuit when the power supply is cut off due to power failure A check valve may be added to a vacuum pump not equipped with one 2 Standard degree of vacuum for the vacuum pump Use a p...

Page 9: ...ment is charged with R407C gas then the refrigerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder Note Do n...

Page 10: ...Outdoor unit Heat exchanger front Compressor Heat exchanger rear SV block 1 SV block 2 4 way valve 4 way valve CS circuit Drier CV block 1 CV block 2 Control box Compressor Compressor P500 TYPE P400 T...

Page 11: ...MAIN board Choke coil L2 Intelligent Power Module IPM G A board Y C board SNB board Diode stack DS Magnetic contactor 52C2 Magnetic contactor 52C1 Magnetic contactor 52F Overload relay 51C2 FANCON boa...

Page 12: ...5 Error Indicator CNRS3 Serial transmission to INV board CN3D SW1 CNTR CNFC1 CNVCC4 Power source for control 5V CN20 Power supply 3 L1 1 N SW3 SW4 SW2 SWU2 SWU1 CNS1 CNS2 CN40 CNVCC3 Power Source for...

Page 13: ...pply for IPM control CNACCT CNAC2 Power source 1 L2 3 N 5 G CN52C Control for 52C CNFAN Control for MF1 CNR CNRS2 Serial transmission to MAIN board SW1 CNVDC 1 4 DC 560V CNVCC4 Power supply 5V CNL2 Ch...

Page 14: ...13 CNFAN CNPOW CNFC2 CN15V1 CNDR1 CNIPM1 CNE CNDC1 FANCON board G A board...

Page 15: ...14 Y C board SNB board...

Page 16: ...15 BC controller CNTR CN02 M NET transmission CN03 CN12 Power supply 1 EARTH 3 N 5 L SW4 SW2 SW1 SW5...

Page 17: ...16 RELAY 10 board RELAY 4 board...

Page 18: ...2b ST15 TH7 TH6 CJ2 MA SA CJ3 CJ1 63HS 63H1 O S 63H2 SLEV Comp2 Comp1 CV1b CV1a SV32 SV22 CP3a TH12 TH2 TH9 Drier CP2 TH11 ST9 ST5 ST6 ST2 21S4a 21S4b ST3 ST4 ST8 TH3 TH4 63LS HEXf1 HEXf3 HEXb1 HEXf2...

Page 19: ...CMB P108 1010 1013 1016V FA SVM2 TH16 TH11 TH12 SVM1 PS3 PS1 Check valve block Solenoid valve block LEV3 LEV1 TH15 Gas liquid separator Solenoid valve Orifice Capillary Check valve Thermal sensor Stra...

Page 20: ...19 CMB P108V FB Check valve block LEV3a TH25 TH22 Solenoid valve block CP Solenoid valve Orifice Capillary Check valve Thermal sensor Strainer...

Page 21: ...ard Fancon board L1 L2 L3 5P CNFAN FB5 Black White Red Controller Box Inverter controller remote Connect to Indoor and Crank case heater Compressor circuit detection circuit detection High pressure sw...

Page 22: ...5 3 1 3 TR X2 X1 X30 X4 X3 X31 X6 X5 X32 X8 X7 X33 X10 X9 X34 X12 X11 X35 DC 30V 6 5 4 3 2 1 6 5 4 3 2 1 LEV3 LEV1 1 2 3 CNP1 1 2 3 CNP3 2 1 1 2 3 4 5 6 7 8 4 3 2 1 1 2 3 2 1 CN03 CN13 CN10 CN11 CN07...

Page 23: ...N27 CN26 CN38 M1 M2 TB02 TR 22V PS3 PS1 TH16 TH15 TH12 TH11 CN32 7 5 3 1 CN33 CN34 3 3 CN05 CN07 CN11 CN10 CN13 CN02 CN03 1 2 3 2 1 1 2 3 4 8 7 6 5 4 3 2 1 1 2 CNP3 3 2 1 CNP1 3 2 1 LEV1 LEV3 1 2 3 4...

Page 24: ...5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 3 TR X2 X1 X30 X4 X3 X31 X6 X5 X32 X8 X7 X33 X10 X9 X34 X12 X11 X35 DC 30V 6 5 4 3 2 1 LEV3 2 1 1 2 3 4 5 6 7 8 4 3 2 1 1 2 3 2 1 CN03 CN13 CN10 CN11 CN07 TH12 TH...

Page 25: ...unit Indoor unit Outdoor unit Items Ambient temp Indoor unit Piping Condition Indoor Outdoor No of units No of units in opera tion Model Main pipe Branch pipe Total piping length Outdoor unit Sectiona...

Page 26: ...A V Pulse Outdoor unit Items Ambient temp Indoor unit Piping Condition Indoor Outdoor No of units No of units in opera tion Model Main pipe Branch pipe Total piping length Outdoor unit Indoor unit Ou...

Page 27: ...tion monitoring Centralized Control Switch Deletion of connection information Deletion of error history Adjustment of Refriger ant Volume Ignore liquid level errors Forced defrosting SW3 2 Function Va...

Page 28: ...only Provided Provided Provided 2nd setting Horizontal Ineffective Ineffective Room temp sensor position Clogged filter detect Filter duration OA intake Remote display select Humidifier control Heati...

Page 29: ...r powering After powering After powering After powering 3 1 2 2 way 4 way 3 way 3 1 2 3 1 2 3 1 2 Option Standard PDFY P20 80VM A PEFY P20 80VMM A 100Pa 50Pa 30Pa For other models change the setting o...

Page 30: ...ts and the total number of remote controllers is displayed in the parenthesis 1 If even one unit that is higher than 200 exists in the cooling system the maximum capacity will be 200 or higher Please...

Page 31: ...supply tank and float switch is operating 1 2 3 Work Content of test run Check point Result Disassembling and assembling the drain water lift up mecha nism Mounting the float switch Electric wiring Le...

Page 32: ...cted Refrigerant piping diameter correct Refrigerant leak generated at connection Insulation work for piping properly done Specified amount of refrigerant replenished Pitch and insulation work for dra...

Page 33: ...mode System set Before starting Error stop or the unit does not operate Can not be properly set with power source turned on The unit does not operate Set temperature not obtained at heating operations...

Page 34: ...8 Make sure that interlocking devices such as ventilator operate normally if they exist in the system 9 Press ON OFF button to cancel test run Stop operation Note 1 If check code is displayed on remo...

Page 35: ...interlocked registration This button is used to retrieve identify the content of groups interlock connection information and registration This button is used to delete the content of groups interlock...

Page 36: ...n of group registration information of indoor units The address of the registered indoor units in a group is retrieved identified 3 Retrieval identification of registration information The connection...

Page 37: ...ltaneously for 2 seconds to return to the original mode with the remote controller under stopping mode Remote controller stopped HO on the display Ordinary mode INDOOR UNIT ADDRESS NO ERROR CODE OAUNI...

Page 38: ...te controller or the like is displayed Operation procedure 1 With the remote controller under stopping mode or with HO displayed on the LED press and hold FILTER buttons A B simultaneously for 2 secon...

Page 39: ...pleting the registration press and hold the FILTER buttons A B simultaneously for 2 seconds to return to the original mode with the remote controller under stopping mode ERROR CODE OAUNITADDRESSNO C I...

Page 40: ...ns H and press button E to display the 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 a...

Page 41: ...ensation temperature is at 49 C in heating mode The fluctuation of the frequency of the variable capacitor compressor is as follows This function is performed at 2Hz per second 20 to 100 Hz TH6 20 C a...

Page 42: ...the bypass valve SV4a when only No 1 compressor is operated at its lowest frequency Cooling After the compressor has been operated for 15 minutes and only No 1 compressor is operated in un load its lo...

Page 43: ...Thermo ON Defrost Stop ON OFF SV1 ON for 4 minutes ON ON for 3 minutes ON ON during oil recovery operation af ter continuous low frequency com pressor operation ON Ps 0 098 MPa Pd 2 65 MPa OFF SV4a N...

Page 44: ...owing a 12 minute timed recovery Termination of defrosting process is prohibited for 4 minutes after the start of defrosting 3 Defrost prohibit Defrosting is not performed for 10 minutes after the sta...

Page 45: ...ter starting unit and during unit stopping Heating During defrosting For 10 minutes after refrigerant recovery Note that liquid level determination is performed even when liquid level detection is dis...

Page 46: ...he fans for the outdoor units are also stopped The fans operate at full speed for 5 seconds after starting The fans for the outdoor unit are stopped during defrosting 3 Capacity control pattern 10 Cir...

Page 47: ...z Operation of the No 2 compressor is prohibited Finished when cumulative operating time reaches 30 minutes Pause Step Both compressors are stopped regardless of the demand from the indoor units 3 min...

Page 48: ...will proceed to Step 3 even if the frequency of No 1 compressor is below the specified value 30 minutes Step 1 3 minutes 10 minutes Step 2 5 minutes Step 3 ON OFF of No 1 compressor ON OFF of No 2 co...

Page 49: ...es for which Emergency Operation is Possible or Impossible Caution During emergency operation only X marked percentage of indoor units can be operated during emergency operation In case more than X ma...

Page 50: ...s controlled corresponding to operation mode as follows Number of pulse 1 2 3 Superheat control Differential pressure control Control every minute so that superheat amount detected by bypass inlet and...

Page 51: ...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...

Page 52: ...mal 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 Transmis...

Page 53: ...ling 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...

Page 54: ...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...

Page 55: ...closed 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 va...

Page 56: ...onized with compressor low speed OFF operations Dry operations 4 way valve OFF Inlet temp 18 C Note 2 Thermostat ON Test run start Note 1 Note 1 When indoor unit inlet temperature exceeds 18 C outdoor...

Page 57: ...TH23 Gas piping temperature MC1 MC2 White Red Yellow Brown Blue Orange M Perform a continuity check using a tester Conductivity among white red and orange Conductivity among yel low brown and blue Res...

Page 58: ...rol of high low pressure bypass when starting and stopping 2 Discharge pressure rise suppression Switching of capacity control valve inside No 2 compressor Switching between full load operation and un...

Page 59: ...ve Name Code Function Inspection method Application Product code Specification Outdoor unit Solenoid vallve Linear expansion valve SV3 8 heat exchanger capacity control SV6a discharge suction bypass S...

Page 60: ...Rt 7 465exp 4057 Thermistor Ro 33k 1 TH2 Thermistor R50 17k 2 THHS Rt 33exp 3965 Rt 17exp 4170 50 40 30 20 10 0 20 10 10 20 30 40 50 0 25 20 15 10 5 0 90 100 110 120 1 273 t 1 273 t 1 273 t 1 273 t 1...

Page 61: ...rated compressor efficiency Comparison including control system 6 6 6 6 6 REFRIGERANT AMOUNT ADJUSTMENT By clarifying the relationship between the refrigerant amount and operating characteristics for...

Page 62: ...and output the signal for the heater relay to LED 5 then check the voltage of the heater terminal AC 198 264 V leave the heater connections as they are 3 Use the LED monitor display to check if there...

Page 63: ...me adjustment mode starts as time passes as the refrigeration system stabilizes it may change to AL 0 Notes 2 As the refrigerant volume cannot be adjusted in the heating mode retrieve the refrigerant...

Page 64: ...nt Retrieve the refrigerant little by little from the low pressure side service port Note 1 As the refrigerant volume cannot be adjusted in the heating mode retrieve the refrigerant evacuate air and t...

Page 65: ...time through the low pressure service port Drain out small amounts of refrigerant at a time from the low pressure service port Drain out small amounts of refrigerant at a time from the low pressure s...

Page 66: ...is not necessary but when the liquid level is on the low side even if it is in the AL 1 region if one unit only is run and refrigerant is accumulating in the units that are stopped it may result in t...

Page 67: ...ifference between the two pressures exceeds 0 098MPa the affected pressure sensor is faulty deterio rating performance c If the pressure reading in the LD1 display does not change the affected pressur...

Page 68: ...under full load will be approxi mately 30 to 40 more than operation under unload Note The solenoid valve for SV22 is closed when conducting electricity while the SV32 is open when conducting electrici...

Page 69: ...ow pressured flows in heating mode Please refer to the Refrigerant Circuit Diagram ON OFF status of solenoid valves depend on the number of running indoor units ambient temperature and other factors C...

Page 70: ...69 1 3 2 4 CV5b CV7b SV7 SV8 Solenoid Valves Block 2 CV4b CV6b CV2b ST1 BV1 BV2 CV3b 1 2 3 4...

Page 71: ...ant flow in the pipes 6 7 8 and 9 depends on the ON OFF status of the SV3 4 5 and 6 Confirm the status on the LED monitor display The caps on valves A B and C can be opened with Allen wrenches The siz...

Page 72: ...71 Check Valves Block2 1 3 5 7 6 4 2 CV5b CV4b CV6b CV2b ST1 BV1 BV2 CV3b Check Valves Block2 1 3 7 2 4 5 6...

Page 73: ...alve opening signal is output to locate the valve s position to ensure that it is at point A The pulse signal is output for approximately 17 seconds Normal operation of the valve does not produce nois...

Page 74: ...tions Output pulses change in the following orders 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 are off 2 When the output is out...

Page 75: ...rmistor liquid pipe temperature sensor will become low If the temperature is consider ably lower compared to the remote control s intake temperature display it can be judged that the LEV is not fully...

Page 76: ...ure to fasten the body in such a way that it will not move Installing the Coils Fasten the body tightly at the bottom Part A in the figure so that the body will not move then insert the coils from the...

Page 77: ...d wiring is being used properly in the necessary environment and that the shield wire ground is appropriate 1 Due to a large capacity electrolytic capacitor used in the inverter voltage is still appli...

Page 78: ...ltage Measure when the inverter out put frequency is stable 1 IPM overcurrent error 4250 2There is a strong possibility of an inverter circuit error if the voltage unbalance across all wiring is great...

Page 79: ...nbalance or error recurrence after replacement Replace the INV board IPM replacement In the case of an output voltage unbalance or error recurrence after replacement Replace the G A board In the case...

Page 80: ...ase Check the ACCT connecting phase and direction U Check Location A1 A2 1 L1 2 T1 3 L2 4 T2 5 L3 6 T3 Judgement value 0 1k 1 3k A2 1 L1 3 L2 5 L3 2 T1 4 T2 6 T3 A1 W ACCT W ACCT U U V IPM W Transform...

Page 81: ...complete open state or short circuit 0 The measured resistance value is a guideline and may deviate slightly Measure between several similar measurement points If the value does not differ by more th...

Page 82: ...efects Blown fuse F1 on INV Board Diode stack destruction Prevention resistance of rush current R1 damage 2 Shorted transmission line 3 Wiring error in the M NET transmission line on the outdoor unit...

Page 83: ...ontrol board of the BC controller Check method and Remedy NO YES NO NO YES YES YES NO 1 Check the BC controller power terminal block voltage Is the voltage between 220 and 240 V Fuse blown off Removed...

Page 84: ...ntrol line No 2 and disconnection of the terminal block connection 3 Reversed wiring cross over in the group control 4 Mis wiring of MA remote control to the terminal block TB5 for the transmission li...

Page 85: ...roller 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 Transmission fails betw...

Page 86: ...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 outdoo...

Page 87: ...tration 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...

Page 88: ...AC2 on the INV board Check the voltage between L2 and N on power supply terminal block TB1 DC24 30 V Except the above mentioned Connector disconnected Except the above mentioned DC24 30 V Except the a...

Page 89: ...e to the entry of fine noise Transmission can be made normally but reply ACK or reply cannot be issued normally due to noise 2 Method to confirm wave shape Check the wave shape of transmission line wi...

Page 90: ...the INSTALLATION MANUAL One 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...

Page 91: ...1 CNTR TB1B CNPOW CNFAN CN04 CNMF CNFAN 52F CN05 CNMF CNFC1 CNFC2 Check if the wiring polarity is as shown on the wiring diagram 3 The motor is faulty 4 A fuse F1 F2 F3 is defective 5 The transformer...

Page 92: ...pres sure sensor OK Replace the wrong puressure sensor with the correct pressure sensor and confirm its detected pres sure is indicated correctly Short connectors 2 and 3 on the board and check the p...

Page 93: ...ly 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...

Page 94: ...k thermistor resistance value Compare temperature for thermistor resistance value with actual mea surement Are they the same Insert applicable thermistor connector into board and check sensor input te...

Page 95: ...esistance using a tester or other instrument 3 Compare measured values with values on the graph below A value within a range of 10 is normal Resistance measurement point connector Temperature sensor r...

Page 96: ...s No Yes No Yes Check if LEV3 is controlled by superheat LEV3 is controlled Check if SVM1 is ON SVM1 ON Check if SVA SVC are ON SVA SVC ON Check if SVB is OFF SVB OFF Check if LEV 3 are controlled by...

Page 97: ...LEV3 pulse Region Failure mode Operating mode Description Normal range LEV3a pulse Small FA FB Cooling only Cooling main Heating main Cooling only Cooling main Heating main SH22 is large SH22 is small...

Page 98: ...oard 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 yell...

Page 99: ...d for disconnected or loose connectors Was the problem found Operate cooler and heater for the applicable solenoid valve s refrigerant system only Clicking noise produced when working timing Measure p...

Page 100: ...rdination signals output from the board and solenoid valve operations Depending on the models SVM is not built in Note 1 SVA SVB SVC SVA SVB and SVC are turned on and off in accordance with operation...

Page 101: ...e four screws securing the front panel and then remove the panel 3 Remove the nine screws securing the ceiling panel and then remove the panal 2 Control Box Removing the two screws that secures the el...

Page 102: ...ature sensor lead securely to the controller board 4 Pressure Sensor Procedure Photos 1 Remove the front panel 1 Follow the procedures under 1 1 2 to check PS1 and PS3 2 Disconnect the connector of th...

Page 103: ...rea for welding 2 If necessary the unit can be lowered from the ceil ing before starting work 6 Solenoid Valve Coil Procedure Photos 1 Remove the service panel See 1 1 2 3 2 Disconnect the connector o...

Page 104: ...tor abnormality 4200 VDC sensor circuit abnormality 4220 Bus voltage abnormality 4230 Radiator panel overheat protection 4240 Over loard protection 4250 1 IPM Alarm output Bus voltage abnormality 11 I...

Page 105: ...bnormality TH1 1205 Preliminary high pressure pipe temperature sensor abnormality TH5 1211 1111 Preliminary low pressure saturation abnormality or preliminary low pressure saturation sensor abnormalit...

Page 106: ...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 according to the following p...

Page 107: ...C SV3 8 SeeTrouble check of LEV and sole noid valve 1 Gas leak gas shortage 2 Overload operations 3 Poor operations of indoor LEV 4 Poor operations of BC controller LEV Cooling only LEV3 Cooling main...

Page 108: ...1 Gas leak Gas shortage 2 Insufficient load operations 3 Poor operations of indoor LEV 4 Poor operations of BC controller LEV Cooling only LEV3 Cooling main LEV1 3 Heating only Heating main LEV3 Defro...

Page 109: ...ly heating principal LEV3 Defrost LEV3 3 Poor operations of BC controller SVM1 Cooling only defrost 4 Poor operations of BC controller SVA Cooling only cooling main 5 Poor operations of BC controller...

Page 110: ...t 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 ca...

Page 111: ...erations Not detected when drain pump is not operating Short 90 C or more detected Open 40 C or less detected When float switch operates point of contact OFF error stop is ob served with code No 2503...

Page 112: ...ween 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 TB1A NF TB1B CNTR1 F3 T01 CNTR Refe...

Page 113: ...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 ind...

Page 114: ...istance Check the IPM Judge that the IPM is fauly Go to Individual Parts Failure Judgment Methods If none of the items from 1 through 8 is applicable and if the problem persists even after the power i...

Page 115: ...the unit s exhaust short cycling Clean the heat exchanger If the power supply voltage is less than 342 V it is outside specifications If the external air temperature is over 43 C it is outside the sp...

Page 116: ...e 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 c...

Page 117: ...the INV board s SW1 1 is OFF Inverter error detail 6 2 The current sensor ACCT miss wiring is detected during inverter operation Inverter error detail 13 1 Pressutre sensor trouble 2 Inner pressure dr...

Page 118: ...exclusively for an R22 model so re place it with the circuit board for a unit which is also capable of using R407C If none of the items from 1 through 5 is applicable and if the problem persists even...

Page 119: ...ered even continuing 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 noi...

Page 120: ...de 6602 6603 Meaning detecting method Cause Checking method Countermeasure Transmission line installed while turning power source on Check power source of indoor unit 220V 240V Shut off the power sour...

Page 121: ...processor 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...

Page 122: ...oller slave is changed or modified during operation 2 Faulty or disconnection of transmission wir ing of BC controller slave 3 Disconnection of BC unit connector CN02 4 Faulty BC controller slave circ...

Page 123: ...glecting to insert OC unit power supply connector CN40 5 Inserting more than 2 sets of power supply connector CN40 for centralized control use For generation after normal operation conduct ed once the...

Page 124: ...stem Problem with all IC 1 As same that for single refrigerant system 2 Insertion of power supply connector CN40 into OC unit transmission line for centralized control 3 Disconnection or power source...

Page 125: ...lized control 3 Disconnection 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 dres...

Page 126: ...on the left c Investigate the transmission wave shape noise on transmission line according to Investigation method of transmission wave shape noise There is a higher possibility of a noise if 6602 is...

Page 127: ...anch No has not been set when used at joint 4 Does the address of BC controller slave become the least address 50 of Indoor controller connecting to BC controller slave 5 The address of Indoor Unit wh...

Page 128: ...it SV 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...

Page 129: ...00 Outdoor unit error delay Over current cut off INV error Refriger ant over charge Composi tion sen sor error Oil tem perature error 18 0100100000 TH11 error TH12 error TH2 error TH3 error TH4 error...

Page 130: ...rter error details 0001 0009 35 1100010000 Error log 6 36 0010010000 Inverter error details 0000 9999 Inverter error details 0001 0009 37 1010010000 Error log 7 38 0110010000 Inverter error details 00...

Page 131: ...IC4 address Capacity code 85 1010101000 IC5 address Capacity code 86 0110101000 IC6 address Capacity code 87 1110101000 IC7 address Capacity code 88 0001101000 IC8 address Capacity code 89 1001101000...

Page 132: ...e displayed as 9999 124 0011111000 COMP1 operating current 126 0111111000 Circulatingcompositioncorrectionvalue 99 9 999 9 128 0000000100 IC1 suction temperature 129 1000000100 IC2 suction temperature...

Page 133: ...id piping temperature IC2 liquid piping temperature IC3 liquid piping temperature IC4 liquid piping temperature IC5 liquid piping temperature IC6 liquid piping temperature IC7 liquid piping temperatur...

Page 134: ...1010101100 IC6 LEV opening 214 0110101100 IC7 LEV opening 215 1110101100 IC8 LEV opening 216 0001101100 IC9 LEV opening 217 1001101100 IC10 LEV opening 218 0101101100 IC11 LEV opening 219 1101101100 I...

Page 135: ...10 0111000010 1111000010 0000100010 1000100010 IC6 operation mode IC7 operation mode IC8 operation mode IC9 operation mode IC10 operation mode IC11 operation mode IC12 operation mode IC13 operation mo...

Page 136: ...1010010010 0110010010 1110010010 0001010010 1001010010 0101010010 1101010010 0011010010 1011010010 0111010010 1111010010 0000110010 1000110010 0100110010 1100110010 0010110010 1010110010 0110110010 1...

Page 137: ...0000101010 1000101010 0100101010 1100101010 0010101010 1010101010 0110101010 1110101010 0001101010 1001101010 0101101010 1101101010 0011101010 1011101010 0111101010 1111101010 0000011010 1000011010 0...

Page 138: ...0110 0001000110 1001000110 0101000110 1101000110 0011000110 1011000110 0111000110 1111000110 0000100110 1000100110 0100100110 1100100110 0010100110 1010100110 0110100110 1110100110 0001100110 IC17 suc...

Page 139: ...1010110 0000110110 1000110110 0100110110 1100110110 0010110110 1010110110 0110110110 1110110110 0001110110 1001110110 0101110110 1101110110 0011110110 1011110110 0111110110 1111110110 0000001110 10000...

Page 140: ...0 1111101110 0000011110 1000011110 0100011110 1100011110 0010011110 1010011110 0110011110 1110011110 0001011110 1001011110 0101011110 1101011110 0011011110 1011011110 0111011110 1111011110 0000111110...

Page 141: ...C20 filter IC22 filter 501 1010111110 502 0110111110 IC23 filter 503 1110111110 IC24 filter 504 0001111110 510 0111111110 511 1111111110 505 1001111110 506 0101111110 507 1101111110 508 0011111110 000...

Page 142: ...re LPS will reach below 0 20 MPa or the indoor unit and the compressor will automatically shut down within 15 minutes of starting the pump down operation Shut down all of the indoor units and the comp...

Page 143: ...rigerant remaining in the 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 exten...

Page 144: ...CS circuit block and correct any malfunc tions Note 3 Is the refrigerant composi tion of OC correct Note 2 Finished checking the composition Check that R407 is correctly charged Note 4 Recharge the r...

Page 145: ...e to Yes If there is a possibility that it was not charged correctly such as with a gas charger continue to No Note 5 After reclaiming the system s refrigerant extract the air to create a vacuum then...

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