Mitsubishi Electric CITY MULTI P500YMF-C Service Handbook Download Page 94

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2) Temperature Sensor

Thermistor troubleshooting flow

Start

Disconnect applicable thermistor
connector from the board.

Measure temperature of applicable
thermistor (actual measured value).

Check thermistor resistance value.

Compare temperature for thermistor
resistance value with actual mea-
sured valued.

difference?

Insert applicable thermistor connector
into board, and check sensor input
temperature on LED monitor for differ-
ence.

difference?

No abnormality.

Change thermistor.

Check for connection
problem.

Change the controller
board.

Note 5

Yes

Note 4

Note 2

Note 1

Note 3

Summary of Contents for CITY MULTI P500YMF-C

Page 1: ...AIR CONDITIONERS CITY MULTI Models PURY P400 P500YMF C Service Handbook Service Handbook PURY P400 P500YMF C ...

Page 2: ......

Page 3: ...ist 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 Judgement of Refrigerant Amount 60 3 Refrigerant Volume Adjustment Mode Operation 62 7 TROUBLESHOOTING 66 1 Principal Parts 66 2 BC Controller Disassembly Procedure 99 3 Self diagnosis and Countermeasures Depending on th...

Page 4: ...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 5: ... change and performance may drop Do not use a refrigerant other than R407C If another refrigerant R22 etc 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 The vacuum pump oil may flow back into the refriger ant cycle and cause the refrigerator oil to deteriorate Do not use the following tools that have been use...

Page 6: ... Both ends of the pipes should be sealed until immediately before brazing Wrap elbows and T s in plastic bags for storage The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil such as Suniso Water infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure Piping materials must be stored with more care than with the conventio...

Page 7: ...d 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 or alkylbenzene 2 Piping Machining Use ester oil ether oil or alkylbenzene small amount as the refrigerator oil to coat flange connections ...

Page 8: ...hen 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 The new refrigerant oil is 10 times more hygroscopic than the conventional oil The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil 2 A flux...

Page 9: ...e refrigerant circuit when the vacuum pump power is turned off power failure It is also possible to attach a check valve to the actual vacuum pump afterwards 2 Standard degree of vacuum for the vacuum pump Use a pump which reaches 0 5 Torr 500 MICRON or below after 5 minutes of operation In addition be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil If...

Page 10: ...gerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder Note In the case of a cylinder with a syphon liquid R407C is charged without turning the cylinder up side down Check the type of cylinder before charging 7 Dryer 1 Replace the dryer when the refrigerant circuit is opened Ex Change the compressor full gas...

Page 11: ...omponents Outdoor unit Propeller fan Heat exchanger front Compressor Propeller fan Fan motor Fan motor 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 TYPE Accumulator ...

Page 12: ... MAIN board Choke coil L2 Inteligent 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 board for MF2 Capacitor C2 C3 Smoothing capacitor Noise filter NP ...

Page 13: ... OFF 3 5 Trouble 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 control 1 2 30V 1 3 30V 4 6 12V 5 6 5V CN3S CN3N LD1 Service LED CN41 ...

Page 14: ...supply 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 Choke coil CNVCC2 Power supply 1 2 30V 1 3 30V 4 6 12V 5 6 5V ...

Page 15: ... 13 CNFAN CNPOW CNFC2 CN15V1 CNDR1 CNIPM1 CNE CNDC1 FANCON board G A board ...

Page 16: ... 14 Y C board SNB board ...

Page 17: ... 15 BC controller CNTR CN02 M NET transmission CN03 CN12 Power supply 1 EARTH 3 N 5 L SW4 SW2 SW1 SW5 ...

Page 18: ... 16 RELAY 10 board RELAY 4 board ...

Page 19: ...6 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 ST14 ST13 ST12 ST11 CV5b CV7b SV8 SV6 SV5 SV4 SV3 SV7 SV Block 2 SV Block 1 HEXf4 HEXb2 CV4b CV4a CV10a Orifice CV9a CV8a CV3a CV2a CV5a CV6a CV7a CV6b CV Block 2 CV Block 1 SV22 32 P500 only CP3b SV4a SV6a SV1 CP1...

Page 20: ... 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 Strainer ...

Page 21: ... 19 CMB P108V FB Check valve block LEV3a TH25 TH22 Solenoid valve block CP Solenoid valve Orifice Capillary Check valve Thermal sensor Strainer ...

Page 22: ... 20 3 Electrical Wiring Diagram PURY P400 500YMF C ...

Page 23: ... 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 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 CN05 TH11 TH12 TH15 TH16 PS1 PS3 22V TB02 M2 M1 CN26 CN27 CN28 CN29 CN30 CN31 TB01 220 240V LEV1 7 6 5 4 3 2 1 1 2 3 4 5 6 CN35 TB01 RELAY4 Board CN32 CN33 CN34 CN39 3 1 X14 X13 X36 X37 X15 X16 X18...

Page 24: ... CN27 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 5 6 1 2 3 4 5 6 DC 30V X35 X11 X12 X34 X9 X10 X33 X7 X8 X32 X5 X6 X31 X3 X4 X30 X1 X2 X14 X13 X36 X37 X15 X16 2 1 CNVCC1 3 X38 X39 X17 X19 X18 X20 X45 X42 X43 X40 X44 X41 CN40 CN41 CNOUT4 CNOUT2 4 1...

Page 25: ...7 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 TH15 22V TB02 M2 M1 CN26 CN27 CN28 CN29 CN30 CN31 TB01 220 240V 7 6 5 4 3 2 1 TB01 RELAY4 Board CN32 CN33 CN39 3 1 X14 X13 X36 X37 X15 X16 CN52 7 5 3 1 7 5 1 3 F01 250VAC 6 3A F T8 T7 T1 T5 T4 T3 T2 T...

Page 26: ...nger outlet DB WB Set m kg A V Pulse Outdoor unit Indoor unit Outdoor unit Items Ambient temp Indoor unit Piping Condition Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length Outdoor unit Sectional temperature Pressure LEV opening Indoor unit fan notch Refrigerant volume Total current Voltage Indoor unit BC controller 1 3 Oil return SLEV 380 400 415 380 40...

Page 27: ...0 650 650 600 350 DB WB Set m kg A V Pulse Outdoor unit Items Ambient temp Indoor unit Piping Condition Indoor Outdoor Quantity Quantity in operation Model Main pipe Branch pipe Total piping length Outdoor unit Indoor unit Outdoor unit Sectional temperature Pressure LEV opening Indoor unit fan notch Refrigerant volume Total current Voltage Indoor unit BC controller 1 3 Oil return SLEV 380 400 415 ...

Page 28: ...g Centralized Control Switch Deletion of connection information Deletion of error history Adjustment of Refriger ant Volume Ignore liquid level errors Forced defrosting Reset of the time the CS circuit is closed SW3 2 Function Valid Invalid Indoor Unit Test Operation Defrosting start tempera ture Defrosting end tempera ture Target low pressure change Pump Down Function Target high pressure change ...

Page 29: ... Indoor unit inlet None 100h Ineffective Fan output display At stationary heating Very low speed SW1 7 setting Ineffective Ineffective Heat pump None 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 Effective Cool only Provided Provided Provided 2nd setting Horizontal Ineffectiv...

Page 30: ...eight setting External static pressure setting For options Setting of air outlet opening Airflow control PLFY P VKM A PCFY P VGM A PLFY P VLMD A PLFY P VKM A PLFY P VKM A PCFY P VGM A PKFY P VGM A PDFY P VM A Phase control Relay selection The ceiling height is changed by SWB setting As this switch is used by interlocking with SWC refer to the item of SWC for detail SWA SWB 1 2 3 2 way 3 5 m 3 8 m ...

Page 31: ... controller and their capabilities The number of indoor units and the total number of remote controllers is displayed within 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 refer to the installation manual for more details Before turning power on to the outdoor unit first turn on the transmission booster If t...

Page 32: ...ting portions of each water piping Water is supplied to water supply tank and float switch is operating Work Content of test run Check point Result Disassembling and assembling of drain water lifting up mechanism Mounting of float switch Electric wiring Lead wire from control box not damaged Rubber cap properly inserted to drain water outlet of drain pan Insulation pipe of gas and liquid pipes dea...

Page 33: ...of branch piping correct Branch pipe properly selected 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 drain piping properly done Specified switch capacity and wiring diameter of main power source used Proper grounding work done on outdoor unit The phases ...

Page 34: ...ish the initial mode System set Before starting Error stop or not operate Can 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 BC controller and outdoor unit Setting of address No done when ...

Page 35: ...y 8 Make sure that interlocking devices such as ventilator operate normally if any 9 Press ON OFF 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 time...

Page 36: ...istration This switch is used to retrieve identify the content of group and interlocked connection information registered This switch is used to retrieve identify the content of group and interlocked connection information registered This switch 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 spo...

Page 37: ...ntification of group 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 u...

Page 38: ...witch 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 indoor unit address No Confirm the connect...

Page 39: ...e controller or the like is displayed Operation procedure 1 With the remote controller under stopping or at the display of HO continuously press the FILTER switch A B at the same time for 2 seconds to change to the registration mode 2 Operate switch 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 S...

Page 40: ... 4 After completing the registration continuously press the FILTER switch A B at 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 regist...

Page 41: ...H and press switch E to call 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 as the address of the indoor unit 4 Press the CLOCK ON OFF switch F twice See the figure below 5 After completing the deletion continuously press the FILTER switch A B at the same time for 2 seconds to retur...

Page 42: ...ollows It is performed at 2 Hz per second 20 to 100 Hz TH6 20 C and in cooling mode or in heating mode 30 to 100 Hz TH6 20 C and in cooling mode 1 No 2 compressor operation stopping and full load un load switching 1 Switching from stopping to operation of No 2 compressor When the required performance cannot be obtained by only No 1 compressor the No 2 compressor will be started The No 2 compressor...

Page 43: ...pressor is operated in un load its lowest frequency the bypass valve is turned ON when the low pressure 63 LS is 1 0 kg cm2 G 0 098 MPa or less and turned OFF when it is 2 0 kg cm2 G 0 196 MPa or more Heating After the compressor has been operated for 3 minutes and only the No 1 compressor is operated in un load its lowest frequency the bypass valve is turned ON when the high pressure Pd exceeds 2...

Page 44: ...ypass solenoid valves SV1 SV4 Both SV1 and SV4 are on open 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 1 0 kg cm2 G 0 098 MPa Pd 27 kg cm2 G 2 65 MPa OFF SV4a Normally ON 3 Capacity control solenoid valve SV22 SV32 P500 only Operation of solenoid valve Solenoid valve SV22 SV32 COMP SV22 SV32 Coil Va...

Page 45: ...compressor began operation or for forced defrosting Setting of Dip SW2 7 on when 10 minutes has passed since recovery from defrosting forced defrost mode recomes active 2 End of defrosting Defrosting ends when 12 minutes have passed since the start of defrosting or when a piping temperature TH5 and TH7 of 7 C or more is detected for 4 minutes or longer Note that if the defrost prohibited time is s...

Page 46: ...n in the figure from temperature A and liquid level detecting temperatures TH3 TH4 After deciding refrigerant status Liquid TH3 and TH4 are TH2 9 C or less Gas TH3 and TH4 are TH2 9 C or more judge liquid level by comparing TH3 and TH4 2 Control of liquid level detection 1 Prohibition of liquid level detection Liquid level is detected in normal conditions except for the following Cooling For 6 min...

Page 47: ...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 Circulating composition sensor CS circuit As shown in the drawing below the CS circuit has the structure to bypass part of the gas discharged from the compres sor through the capillary tube to the suctio...

Page 48: ...Hz 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 minutes Step 2 Only the No 1 compressor is operated Operation of the No 2 compressor is prohibited Operates continuously for 10 minutes and finishes Step 3 Both compressors No 1 and No 2 are operated Fo...

Page 49: ...e 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 compressor End of initial operation mode Note 1 30 minutes Step 1 3 minutes 10 minutes Step 2 3 minutes 10 minutes Step 2 Step 2 5 minutes Step 3 Note 1 ON OFF of No 1 compressor ON OFF of No 2 compres...

Page 50: ...or 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 marked percentage of indoor units are operated over than the percentage of indoor units would be on the stand by mode Codes for which emergency operation is possible Emergency Mode Pattern Abnormality Codes...

Page 51: ... is 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 oulet temperatures TH12 TH15 stay in the specified range FA TH12 TH15 FB TH22 TH25 Control every minute so that detected differential pressure PS1 PS3 stay in the specified range 60 or more pulses ...

Page 52: ...r 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 53: ...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 54: ...ooling 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 60 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 observed in ...

Page 55: ... 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 56: ... 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 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 defros...

Page 57: ...ronized 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 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 as th...

Page 58: ...g 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 Resistance value check Con nector Pressure 0 to 30 kg cm2 G 0 to 2 94 MPa Vout 0 5 to 3 5 V Connector GND Black Vout White Vc DC 5 V Red 1 273 t 1 273 63HS Pressure 0 to 10 kg cm2 G 0 to 0 98 MPa Vout 0 5 to 3 5 V 0 3...

Page 59: ... 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 unload operation only P500 YMF C Capacity control and controlling the rise of high pressure Back up of frequency control R120 7 465 kΩ B25 120 4057 Rt 7 465exp 4057 20 C 250 kΩ 70 C 34 kΩ 30 C 160 kΩ 80 C 24 kΩ 40...

Page 60: ...way valve 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 SLEV Oil re turn Controls heat exchanger capacity of outdoor unit Evaporation of liquid refrigerant inside MC2 Adjusts the rate of refrigerant oil re turning from the accumulator AC 220 to 240 V...

Page 61: ...Rt 7 465exp 4057 Thermistor Ro 33kΩ 1 TH2 Thermistor R50 17kΩ 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 1 273 50 Temperature C Temperature C Temperature C Temperature C Resistance kΩ Resistance kΩ Resistance kΩ Resistance kΩ 1 273 0 1 273 120 1 273 0 ...

Page 62: ...orated 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 BgR2 Series conduct service activities such as decision on the amount and adjustment of refrigerant on the market 1 Operating Characteristics and Refrigerant Amount The followings are operating chara...

Page 63: ...t 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 is misalignment between the actual temperature and the detected temperature of TH2 TH4 2 Refrigerant Volume 1 Checking the Operating Condition Operate all the indoor units in cooling or in heating checking the...

Page 64: ...ume adjustment mode starts as time passes as the refrigeration system stabilizes it may change to AL 0 Notes 2 As the refrigerant volume can not be adjusted in the heating mode retrieve the refrigerant evacu ate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season Notes 3 A refrigerant volume adjustment performed in the cool...

Page 65: ...me of refrigerant Retrieve the refrigerant little by 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 SC16 30deg 30deg SC16 TH1 110 C Fill refrigerant litt...

Page 66: ...refrigerant at a 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 service port Draining out approximately 5 kg of refrigerant Turn all of switches of SW1 OFF Adjustment complated Adjustment complated Readjust YES NO Finish charging with refrigerant Fi...

Page 67: ...s 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 there being insufficient refrigerant so at such a time adjustment is necessary Note 5 Determine the difference in the volume of refrigerant necessary for cooling and for heating as follows and carry out ...

Page 68: ...tween the two pressures exceeds 1 kg cm2 G 0 098MPa 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 1 kg cm2 G 0 098MPa on the LD1 display the affected pre...

Page 69: ...der full load will be approximately 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 electricity 3 SV4a Bypass valve 1 During unload operation in the cooling mode and when there is a rise in temperature and during unload operation in the heating mode SV4a will be set to ON according to conditions...

Page 70: ...ng mode Please refer to the 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 Solenoid Valves Block1 ...

Page 71: ... 69 Solenoid Valves Block2 1 3 2 4 CV5b CV7b SV7 SV8 Solenoid Valves Block 2 CV4b CV6b CV2b ST1 BV1 BV2 CV3b 1 2 3 4 ...

Page 72: ...6 7 8 and 9 are depend 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 B 20kg m 2 0N m C 13kg m 1 3N m ...

Page 73: ... 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 74: ...o make sure the valve s position so that it is definitely at point A The pulse signal is output for approximately 17 seconds When the valve operates smoothly there is no sound from the LEV and no vibration occurs but when the valve is locked it emits a noise Whether a sound is being emitted or not can be determined by holding a screwdriver etc against it then placing your ear against the handle If...

Page 75: ...erature sensor will become low If the temperature is considerably low compared to the remote control s intake temperature display it can be judged that there is a fully closed failure In the case of minimal leakage it is not necessary to replace the LEV if there are no other effects 1 Check for pins not fully inserted on the connector and check the colors of the lead wires visually 2 Disconnect th...

Page 76: ...be sure 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 top inserting the coils stopper securely in one of the indentations on the body There are four indentations for the stopper on the body around its circumference and it doesn t matter which indent...

Page 77: ...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 78: ...e outdoor unit For detail refer to Pages 127 INV board defects Blown fuse F1 on INV Board Diode stack destruction Prevention resistance of rush current R1 damage 2 Transmission line short 3 Wiring mistakes of the M NET transmission line on the side of the outdoor unit 1 Break of transmission line and removal of terminal block 2 The room transmission line is wired to the transmission line terminal ...

Page 79: ...cts on the control board of the BC controller Check method and handling NO YES NO NO YES YES YES NO 1 Check the BC controller power terminal block voltage 220 240V Fuse blown off Removed Within spec Fuse check on the board Connector removal checks CN03 CN12 CNTR Connector connection defects Modify the defective places Check for factors of transformer cut Earth route on the board Earth route of sen...

Page 80: ...on of the terminal block connection 3 Reversed wiring cross over in the group control 4 Wire by mistakes the MA remote control to the terminal block TB5 for the transmission line 5 Connect by mistakes the M NET transmission line to the MA remote control terminal block TB13 7 The unit address is not 00 as it should be with automatic address setting 8 The address of Indoor Unit becomes 51 or more 9 ...

Page 81: ...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 uncontrolled As normal transmission is 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 30V...

Page 82: ... 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 the indoo...

Page 83: ...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 84: ...oard 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 above mentioned DC24 30 V Except the above mentioned 0 5 2 5Ω Except the above mentioned 19 25Ω Except the above mentioned 0Ω Except the above mentioned AC198 264 V Except the above mentioned AC198 264 V Except the ab...

Page 85: ... 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 86: ...L 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 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 c...

Page 87: ... 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 ...

Page 88: ...ing TB1A NF TB1B CNTR1 T01 CNTR TB1B CNPOW CNFAN CN04 CNMF CNFAN 52F CN05 CNMF CNFC1 CNFC2 Check if the wiring polarity is as shown on the wiring diagram plate 3 The motor is faulty 4 A fuse F1 F2 F3 is defective 5 The transformer T01 is defective 6 The circuit board is faulty Measure the resistance of the motor s coils 20 60Ω Measure the motor s insulation resistance with a megger 10 MΩ DC 500 V ...

Page 89: ...ing 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 90: ...ution at replacement of inverter parts 1 IPM and G A board should be replaced together at the same time When the IPM is damaged the G A board may possibly be broken and the use of the broken G A board damages the normal IPM Therefore replace the IPM and G A board 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 o...

Page 91: ... 89 Motor Compressor G A board Red U V W N P White Black Black Capacitor C2 C3 Red IPM ...

Page 92: ...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 1kg cm2 G 0 098MPa Pressure of at least 32kg cm2 G 3 14MPa indicated Remove the pressure sensor connector from the board and check the pressure Check for faulty connector o...

Page 93: ...nly 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 satura tion temperature Low pressure of outdoor BC controller pressure liquid measurement...

Page 94: ...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 95: ...resistance 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 resistance graph Note 4 Check using LED monitor display switch outdoor MAIN board SW1 Measured Data Signal SW1 Setting Remarks Liquid inlet temperature Bypass inlet temperature Bypass outlet temperatu...

Page 96: ...Yes No Yes No Yes No Yes Check if LEV3 is controlled by superheat LEV3 is not 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 differential pressure Completion Check SVB Check SVA SVC Check SVM1 Check LEV3 Correct the problem Check LEV1 SVB ON Check if SVB is ON SVA SVC OFF Check if SVA SVC are OFF SVM1 OFF Check...

Page 97: ... 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 PS1 medium pressure PS3 is large High pressure PS1 medium pressure PS3 is small SH12 is large High pressure PS1 mid pr...

Page 98: ... 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 illus...

Page 99: ...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 100: ...SVM1 Coordination signals output from the board and solenoid valve operations SVM is not built in depending on models Note 1 SVA SVB SVC SVA SVB and SVC are turned on and off in accordance with operation mode SVM1 SVM is turned on and off in accordance with operation mode Note 2 SVA SVB SVC SVM1 Measure temperature of piping on either side of SVA 1 A Measure temperature at points marked X Measure ...

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 electric panel box cover provides access to the controller board and all of the relay board for checking So it is not necessary to work according to above 2 Procedure Photos Be careful on removing heavy...

Page 102: ...rature sensor lead securely to the controller board 4 Pressure Sensor Procedure Photos 1 Remove the front 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 i...

Page 103: ...e the unit can be lowered from the ceiling before starting work 6 Solenoid Valve Coil Procedure Photos 1 Remove the service panel See 1 1 2 3 2 Disconnect the connector of the applicable solenoid valve 3 Remove the solenoid valve coil 1 SVA SVB and SVM1 2 solenoid valve coils can be serviced from the maintenance port SVC can serviced from the back if service space is available in the back To remov...

Page 104: ...al abnormality 4116 Fan speed abnormality motor abnormality 4200 VDC sensor circuit abnormality 4220 Bus voltage abnormality 4230 Radiator panel overheat protection 4240 Over loard 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 Low pressure saturation TH2 OC 5103 Gas pipe...

Page 105: ...H5 1211 Preliminary low pressure saturation abnormality or preliminary low pressure saturation sensor abnormality TH2 1214 Preliminary THHS sensor circuit abnormality 1216 Preliminary sub cool coil outlet thermal sensor abnormality TH7 1217 Preliminary sub cool coil bypass outlet thermal sensor abnormality TH8 1219 Preliminary sub cool coil bypass inlet thermal sensor abnormality TH9 1221 Prelimin...

Page 106: ...n the 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 IN...

Page 107: ...k gas shortage 2 Overload 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 Defronst LEV3 5 Poor operations of BC controller SVM1 Cooling only defrost 6 Poor operations of BC controller SVA Cooling only Cooling main 7 Poor operations of BC controller SVB Heating only Heating main 8 Poor operations ...

Page 108: ...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 Defrost LEV3 5 Poor operations of BC controller SVM1 Cooling only Defrost 6 Poor operations of BC controller SVM1 Cooling only Cooling main 7 Poor operations of BC controller SVB Heating only Heating main 8 Solenoid valve trouble SV3 8 Heating ...

Page 109: ... only 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 SVB Heating only heating main 6 Solenoid valve SV 3 8 trouble Cooling only cooling main Refer to the item on judging low pres sure pressure sensor failure Check operations status by actually perfor...

Page 110: ...oor 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 con...

Page 111: ...n 2 hours after the out door unit is stopped 2nd detection an error stop is performed and the check code 1501 is displayed 3 If the temperature 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 ou...

Page 112: ... occurred in heating and then enter into the ordinary operation state When drain sensor detects flood ing during drain pump OFF When indirect heater of drain sen sor is turned on rise in tempera ture is 20 deg or less in water for 40 seconds compared with the temperature detected before turn ing on the indirect heater Short open is detected during drain pump operations Not detected when drain pump...

Page 113: ...etween 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 Refer to the circuit number and the wir ing diagram plate If F1 on the MAIN board or F3 is melted Resistance between both ends of the fuse is replace the fuses To judge failure of the T01 go to Indi vid...

Page 114: ... 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 Replace indoor controller board ...

Page 115: ...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 ground wires etc...

Page 116: ...erter compressor is defec tive Is 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 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 ...

Page 117: ... 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 Short Circuit Detection Open Circuit Detection TH11 TH12 240 C or higher 0 57 kΩ 15 C or lower 321 kΩ TH2 70 C or higher 1 71 kΩ 40 ...

Page 118: ... inverter started when the INV board s SW1 1 is OFF Inverter error detail 6 2 If the current sensor ACCT miss wiring is detected during inverter operation Inverter error detail 13 1 Pressutre sensor trouble 2 Inner 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 tro...

Page 119: ...C and error 7130 occurs the indoor unit s circuit board is for an exclusive 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 in 1 to 5 is appli cable and if the trouble reappears even after the power is switched on again replace the circuit board by fol lowing procedure when replacing the circuit board be sure to connect all the c...

Page 120: ...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 121: ...Checking code 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 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 co...

Page 122: ... 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 123: ...rd 1 When BC controller slave is changed or modified during operation 2 Faulty or disconnection of transmission wir ing of BC controller slave 3 Slipping off of BC unit connector CN02 4 Faulty BC controller slave 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 u...

Page 124: ...frigerant system 4 Neglecting insertion of 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 following causes can 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 Ca...

Page 125: ...em Trouble of 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 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 refriger...

Page 126: ... power shutdown of power sup ply 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 later ...

Page 127: ...e transmission wave shape noise on transmission line according to Investigation method of transmission wave shape noise Much possibility of a noise if 6602 is generated 3 System error Checking code 7100 7101 7102 Meaning detecting method Cause Checking method Countermeasure Total capacity error Total capacity of indoor units in the same refrigerant system ex ceeds limitations Trouble source Outdoo...

Page 128: ... branch 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 which is connected to BC controller slave sets up the small address from the greatest address of Indoor Unit which is connected to BC con trol master 1 In case when the old type remote controller for...

Page 129: ...olenoid 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 d...

Page 130: ...0 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 TH5 error TH6 error TH7 error 19 1100100000 TH9 error TH10 error High pres sure sen sor error THHS error 20 0010100000 Machine No 1 Machine No 2 Machine No 3 Machine No 4 Machine No 5 Machine No 6 Mach...

Page 131: ...verter 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 0000 9999 Inverter error details 0001 0009 39 1110010000 Error log 8 40 0001010000 Inverter error details 0000 9999 Inverter error details 0001 0009 41 1001010000 Error log 9 42 0101010000 Inverter er...

Page 132: ...00 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 IC9 address Capacity code 90 0101101000 IC10 address Capacity code 91 1101101000 IC11 address Capacity code 92 0011101000 IC12 address Capacity code 93 1011101000 IC13 address Capacity code 94 0111...

Page 133: ...are 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 130 0100000100 IC3 suction temperature 131 1100000100 IC4 suction temperature 132 0010000100 IC5 suction temperature 133 1010000100 IC6 suction temperature 134 0110000100 IC7 suction temperature 13...

Page 134: ...uid 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 temperature IC8 liquid piping temperature IC9 liquid piping temperature IC10 liquid piping temperature IC11 liquid piping temperature IC12 liquid piping temperature IC13 liquid piping temperature IC14 liquid p...

Page 135: ... 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 IC12 LEV opening 220 0011101100 IC13 LEV opening 221 1011101100 IC14 LEV opening 222 0111101100 IC15 LEV opening 223 1111101100 IC16 LEV opening 0000 Stop 224 0000011100 IC1 operation mode 0001 Fan 22...

Page 136: ...010 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 mode IC14 operation mode IC15 operation mode IC16 operation mode IC1 filter IC2 filter IC3 filter IC4 filter IC5 filter IC6 filter IC7 filter IC8 filter IC9 filter IC10 filter IC11 filter IC12 filter I...

Page 137: ...0 1010010010 0110010010 1110010010 0001010010 1001010010 0101010010 1101010010 0011010010 1011010010 0111010010 1111010010 0000110010 1000110010 0100110010 1100110010 0010110010 1010110010 0110110010 1110110010 0001110010 1001110010 0101110010 1101110010 0011110010 1011110010 0111110010 BC master TH11 data BC master TH12 data BC master TH15 data BC master TH16 data BC master SC11 data BC master SH...

Page 138: ...0 0000101010 1000101010 0100101010 1100101010 0010101010 1010101010 0110101010 1110101010 0001101010 1001101010 0101101010 1101101010 0011101010 1011101010 0111101010 1111101010 0000011010 1000011010 0100011010 1100011010 0010011010 1010011010 0110011010 1110011010 0001011010 1001011010 0101011010 1101011010 IC17 address capacity code IC18 address capacity code IC19 address capacity code IC20 addr...

Page 139: ...00110 0001000110 1001000110 0101000110 1101000110 0011000110 1011000110 0111000110 1111000110 0000100110 1000100110 0100100110 1100100110 0010100110 1010100110 0110100110 1110100110 0001100110 IC17 suction temperature IC18 suction temperature IC19 suction temperature IC20 suction temperature IC21 suction temperature IC22 suction temperature IC23 suction temperature IC24 suction temperature IC17 li...

Page 140: ...11010110 0000110110 1000110110 0100110110 1100110110 0010110110 1010110110 0110110110 1110110110 0001110110 1001110110 0101110110 1101110110 0011110110 1011110110 0111110110 1111110110 0000001110 1000001110 0100001110 1100001110 0010001110 1010001110 IC17 gas piping temperature IC18 gas piping temperature IC19 gas piping temperature IC20 gas piping temperature IC21 gas piping temperature IC22 gas ...

Page 141: ...10 1111101110 0000011110 1000011110 0100011110 1100011110 0010011110 1010011110 0110011110 1110011110 0001011110 1001011110 0101011110 1101011110 0011011110 1011011110 0111011110 1111011110 0000111110 1000111110 0100111110 IC17 LEV opening IC18 LEV opening IC19 LEV opening IC20 LEV opening IC21 LEV opening IC22 LEV opening IC23 LEV opening IC24 LEV opening IC17 opeartion mode IC18 opeartion mode I...

Page 142: ...IC20 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 0000 9999 Remarks Display LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 509 1011111110 ...

Page 143: ...h below at least 2 kg cm2 G 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 compressor if the pressure gage for the low pressure servicing joint CJ2 reads 1 5 kg cm2 G 0 15 MPa or after running the pump down operation for 20 minutes 5 Shut off the gas ball valve BV1 for the o...

Page 144: ...door units and the compressor 1 With SW3 1 on the MAIN board of the outdoor unit set to ON and SW3 2 ON OFF to stop all indoor units and the compressor 2 Check that all indoor units have been stopped 3 Close both ball valves BV1 and BV2 4 Remove any refrigerant 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 ...

Page 145: ... the refrigerant do not discharge it into the air 2 Repair the leaks 3 After the leaks are repaired replace the dryer with a new one and extract all of the air from the entire system to create a vacuum Then refill with refrigerant until it reaches the calculated specification outdoor unit extension piping indoor units Refer to Chapter 6 for more details ...

Page 146: ... CS circuit block and correct any malfunc tions Note 3 Is the refrigerant composi tion of αOC correct Note 2 Finished checking the composition Check that R407 is correctly charged Note 4 Recharge the refrigerant Note 5 Finished checking the composition Calibrate the refrigerant composition of αOC Note 6 Are all units operating stably Note 1 9 CHECK THE COMPOSITION OF THE REFRIGERANT ...

Page 147: ...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 refill with new refrigerant Be sure to charge in the liquid phase In addition be sure to change the dryer Note 6 After the units are operating stably check that the refrigerant composition of αOC is wit...

Page 148: ... MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 0005 TELEX J24532 CABLE MELCO TOKYO New publication effective Aug 2002 Specifications subject to change without notice Service Handbook PURY P400 P500YMF C Issued in Aug 2002 F1105 214 MDOC Printed in Japan ...

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Mitsubishi Electric CITY MULTI P500YMF-C, Service Handbook

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