Mitsubishi Electric PUMY-P200YKM Technical & Service Manual Download Page 1 | Manualshive

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Mitsubishi Electric PUMY-P200YKM Technical & Service Manual Download Page 1

<Outdoor unit>

[Model Name]

PUMY-P200YKM

PUMY-P200YKM

PUMY-P200YKM-BS

[Service Ref.]

Salt proof model

PUMY-P200YKM-BS

TECHNICAL & SERVICE MANUAL

OUTDOOR UNIT

HFC

utilized

R410A

Model name

indication

PARTS CATALOG (OCB575)

CONTENTS

  1. SAFETY PRECAUTION.................................... 2
  2. OVERVIEW OF UNITS...................................... 5
  3. SPECIFICATIONS............................................. 7
  4. DATA.................................................................. 8
  5. OUTLINES AND DIMENSIONS...................... 15
  6. WIRING DIAGRAM......................................... 16
7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION..... 17
  8. TROUBLESHOOTING..................................... 27
9. ELECTRICAL WIRING...................................111
10. REFRIGERANT PIPING TASKS....................115
11. DISASSEMBLY PROCEDURE....................... 119

Note:

•

This service manual

describes technical data of

the outdoor units only.

No. OCH575

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

October 2014

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Summary of Contents for PUMY-P200YKM

Page 1: ...ENTS 1 SAFETY PRECAUTION 2 2 OVERVIEW OF UNITS 5 3 SPECIFICATIONS 7 4 DATA 8 5 OUTLINES AND DIMENSIONS 15 6 WIRING DIAGRAM 16 7 NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 17 8 TROUBLESHOOTING 27 9 ELECTRICAL WIRING 111 10 REFRIGERANT PIPING TASKS 115 11 DISASSEMBLY PROCEDURE 119 Note This service manual describes technical data of the outdoor units only No OCH575 SPLIT TYPE HEAT PUMP AIR CONDITI...

Page 2: ...refrigerant charging scale Vacuum pump adaptor Size adjustment gauge Gauge manifold Torque wrench Gas leak detector Charge hose Tools for R410A Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil ente...

Page 3: ...stall the unit in a location where the salt will be washed away by rainwater If a sunshade is installed rainwater may not clean the panel 3 To ensure that water does not collect in the base of the outdoor unit make sure that the base is level not at angle Water collecting in the base of the outdoor unit could cause rust 4 If the unit is installed in a coastal area clean the unit with water regular...

Page 4: ...7 0 22 0 26 0 29 0 17 0 22 0 24 0 27 0 36 0 Nominal dimensions in Flare nut dimensions Outside diameter Dimension B mm R410A R22 mm Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge valve Vacuum pump Flare tool Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermis tor v...

Page 5: ...TION KIT PAC LV11M J and an M series indoor unit refer to the installation manual for the CONNECTION KIT Decorative panel OVERVIEW OF UNITS Model Capacity Cassette Ceiling Ceiling Concealed Wall Mounted Ceiling Suspended Floor standing Ceiling Concealed Fresh Air 1 CONNECTION KIT 4 way flow 2 way flow 1 way flow Exposed Concealed PAC LV11M J PLFY P PLFY P PMFY P PEFY P PKFY P PCFY P PFFY P PFFY P ...

Page 6: ...ty Cooling kW Heating kW 22 4 25 0 5 4 Compressor kW PUMY P200YKM PUMY P200YKM BS Cooling Heating capacity indicates the maximum value at operation under the following condition Cooling Indoor D B 27 C W B 19 0 C Outdoor D B 35 C Heating Indoor D B 20 C Outdoor D B 7 C W B 6 C 3 Operating temperature range Notes D B Dry Bulb Temperature W B Wet Bulb Temperature 10 to 46 C D B When connecting PKFY ...

Page 7: ...vanized Steel Sheet Munsell No 3Y 7 8 1 1 External dimension HxWxD mm 1338 x 1050 x 330 25 in 52 11 16 x 41 11 32 x 13 1 Protection devices High pressure protection High pressure Switch Inverter circuit COMP FAN Overcurrent detection Overheat detection Heat sink thermistor Compressor Compressor thermistor Over current detection Fan motor Overheating Voltage protection Refrigerant Type x original c...

Page 8: ...will be calculated as follows by using the formula in 4 1 2 1 Model 25 25 19 o 2 84 kW Model 50 25 19 o 5 59 kW 2 8 25 2 5 6 25 2 6 3 28 4 3 2 28 4 2 Sample calculation 1System assembled from indoor and outdoor unit in this example the total capacity of the indoor units is greater than that of the outdoor unit Outdoor unit PUMY P200YKM BS Indoor unit PKFY P25VBM E o 1 PLFY P50VLMD E o 4 2According...

Page 9: ...speed Hi Amount of refrigerant kg 10 9 Outdoor unit Electric current A 9 28 8 96 Voltage V 230 400 Compressor frequency Hz 71 86 LEV opening Indoor unit Pulse 219 283 Pressure High pressure Low pressure MPa 2 98 0 93 2 18 0 60 Temp of each section Outdoor unit Discharge C 65 2 53 8 Heat exchanger outlet 39 6 1 4 Accumulator inlet 10 1 1 7 Compressor inlet 9 0 3 4 Indoor unit LEV inlet 28 8 22 6 He...

Page 10: ...BS Cooling 0 0 5 0 10 0 15 0 20 0 25 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 24 0 26 0 28 0 30 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 24 0 26 0 28 0 30 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 24 0 26 0 28 0 30 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 0 0 2 0 4 0 6 0 8 0 10 0 12 0 380V 400V 415V Capacity kW Total capacity of indoor units kW Total capacity of indoor ...

Page 11: ...18 0 20 0 22 0 24 0 26 0 28 0 30 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 24 0 26 0 28 0 30 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 0 0 2 0 4 0 6 0 8 0 10 0 12 0 0 0 5 0 10 0 15 0 20 0 25 0 30 0 380V 400V 415V Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Input kW Current A Total capacity of indoor units kW OCH575 ...

Page 12: ...in 1 by the ratio between the individual capacity at the rated time and the total capacity at the rated time individual capacity at the rated time Individual capacity under stated conditions total capacity under the stated conditions o total capacity at the rated time Rated cooling capacity Rated heating capacity Indoor D B 27 C W B 19 C Outdoor D B 35 C Indoor D B 20 C Outdoor D B 7 C W B 6 C 24 ...

Page 13: ...aining the Equivalent Piping Length Equivalent length for type P200 length of piping to farthest indoor unit 0 3 number of bends in the piping m Length of piping to farthest indoor unit type P200 80 m 4 4 3 Correction of Heating Capacity for Frost and Defrosting If heating capacity has been reduced due to frost formation or defrosting multiply the capacity by the appropriate correction factor from...

Page 14: ... 250 500 1000 2000 4000 8000 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE PUMY P200YKM PUMY P200YKM BS COOLING MODE HEATING COOLING SILENT MODE 56 SPL dB 61 53 LINE OCH575 ...

Page 15: ...Installation Feet 2 U Shaped notched holes Foundation Bolt M10 2 12 36 Oval holes Foundation Bolt M10 Rear Air Intake Side Air Intake Air Discharge 417 330 25 70 42 56 370 28 225 225 600 19 33 53 56 0 Rear Air Intake Handle for moving Handle for moving Drain hole 5 33 Bottom piping hole Knock Out 81 86 154 136 45 160 160 160 110 Example of Notes Refrigerant GAS pipe connection FLARE 15 88 5 8F Ref...

Page 16: ...e Switch 63HS High Pressure Sensor 63LS Low Pressure Sensor ACL4 Reactor DCL P B Power Circuit Board Connection Terminal U V W Phase TB U V W MULTI B Fuse T6 3AL250V F1 F2 Switch Display Selection SW1 Switch Function Selection SW2 Switch Test Run SW3 Switch Model Selection SW4 Switch Function Selection SW5 Switch Function Selection SW6 Switch Function Selection SW7 Switch Model Selection SW8 Switc...

Page 17: ... 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 004 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 005 1 A transmission wire must be connected to each refrigerant system outdoor and indoor 2 Set addresses Outdoor unit 051 100 Indoor unit 001 050 Remote controller 101 200 3 PUMY has no 100ths digit switch The address automatically become 100 if it is set as 01 50 Remote cont...

Page 18: ...iner Strainer Capillary tube LEV 2 Strainer Strainer Service port Refrigerant liquid pipe Stop valve Strainer Strainer Note When connecting the CONNECTION KIT PAC LV11M J and an M series indoor unit refer to the installation manual for the CONNECTION KIT Refrigerant piping specifications dimensions of flared connector Item Capacity Liquid piping Gas piping Indoor unit P15 20 25 32 40 50 6 35 1 4 1...

Page 19: ...nit Indoor Unit IC Outdoor unit OC Range 001 to 050 051 to 100 101 to 150 151 to 200 Setting Method Use the smallest address of all the indoor units plus 50 Indoor unit address plus 100 Indoor unit address plus 150 a Same as above b Connect terminals M1 and M2 on transmission cable terminal block TB5 of the IC main unit with the most recent address within the same indoor unit IC group to terminal ...

Page 20: ...or unit The remote controller address is the indoor unit main address plus 100 In this case it should be 101 M NET remote controller RC and MA remote controller MA cannot be used together Do not connect anything with TB15 of indoor unit IC Name Symbol Maximum units for connection Outdoor unit OC Indoor unit IC 1 OC unit can be connected to 1 to 12 P175 1 to 12 P200 1 to 12 P225 IC units M NET remo...

Page 21: ...the termi nal S on the power supply unit with the earth g Set the address setting switch as follows h The group setting operations among the multiple indoor units is done by the remote controller RC after the electrical power has been turned on Unit Range Setting Method IC Main 01 to 00 Use the smallest address within the same group of indoor units IC Sub 01 to 50 Use an address other than the IC ...

Page 22: ...ver connect together the terminal blocks TB5 for transmission wires for indoor units IC that have been connected to different outdoor units OC Set all addresses to ensure that they are not overlapped M NET remote controller and MA remote controller cannot be connected with the indoor unit of the same group wiring together A B C E D IC 51 TB5 RC 01 IC TB5 03 IC TB5 02 IC TB5 04 IC TB5 05 IC TB5 07 ...

Page 23: ...emote controllers connect terminals 1 and 2 on transmission cable terminal block TB15 for each indoor unit with the terminal block for 2 remote controllers Set either one of the MA remote controllers to sub remote controller Refer to the installation manual of MA remote con troller a The same as above a b The same as above b c Connect terminals 1 and 2 on transmission cable terminal block TB15 of ...

Page 24: ...er cannot be used together with the indoor unit of the same group 3 MA remote controller or more cannot be connected with the indoor unit of the same group The second MA remote controller is connected with the terminal block TB15 for the MA remote controller of the same indoor unit IC as the first remote control NO MA 00 IC 00 OC MA 00 IC TB5 1 2 TB15 A B M1M2 TB3 S TB7 TB5 TB15 M1M2 S M1M2 S 1 2 ...

Page 25: ...ne by the remote controller RC after the electrical power has been turned on i When connecting PWFY unit For PWFY series do not set up group connection with other indoor units LOSSNAY is not available for use with PWFY series Use a WMA remote controller for operation of PWFY series For more details refer to the service manual for PWFY series Unit Range Setting Method IC Main 01 to 00 Use the small...

Page 26: ...L7 500 m 1 25 E more Longest transmission cable length M NET cable L1 and L3 L4 and L6 and L2 L6 and L7 200 m 1 25 E or more Remote controller cable length m1 and m1 m2 m3 and m1 m2 m3 m4 200 m 0 3 to 1 25 E A Group B Group C Group D Shielded Wire E Sub Remote Controller Address example A B C E IC 51 TB5 TB15 TB15 TB15 TB15 MA 01 IC TB5 03 IC TB5 02 IC TB5 04 IC 05 IC TB5 07 IC 06 MA MA MA OC 53 O...

Page 27: ... into remote controller s Never touch the on off switch of the remote controller s Refer to 8 1 2 Special Function Operation and Settings for M NET Remote Controller as for settings In MA remote controller s this registration is unnecessary 4 More than 12 hours later from power supply to the outdoor unit turn all power switch to on for the test run Perform test run according to the Operation proce...

Page 28: ...ode Check the cold air blow off Heat mode Check the heat blow off Press the F1 button to go through the operation modes in the order of Cool and Heat Check the auto vane with the F1 F2 buttons Press the button to return to Test run operation Press the button When the test run is completed the Test run menu screen will appear The test run will automatically stop after 2 hours The function is availa...

Page 29: ...The above steps are the same as when making group settings A Changing to the linked operation unit address display state The display shown in Figure 4 will appear when the a button on the remote control is pressed Displaying the address of the Lossnay unit and linked indoor unit In this situation the indoor unit number will be the lowest address of the group The Lossnay unit will not operate if th...

Page 30: ...ing the check Simultaneously press the FILTER and k buttons on the remote controller and hold for 2 seconds to return to the normal mode 3 Clearing an address Refer to section 1 regarding the address entry and section 2 regarding checking addresses a In making group settings Turn off the remote controller The procedure is the same as described in a under 2 Address check Put in the indoor unit addr...

Page 31: ...er module Check delay code 4350 4400 Rotational frequency of outdoor fan motor Check delay code 4500 5101 Air inlet thermistor trouble TH21 or Compressor temperature thermistor TH4 open short Check delay code 1202 5102 Liquid pipe temperature thermistor trouble TH22 Suction pipe temperature thermistor TH6 open short Check delay code 1211 5103 Gas pipe temperature thermistor trouble TH23 5105 Outdo...

Page 32: ...sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy multi 0403 Serial communication error No Yes Are they connected normally Check the connection of the communication line CN2 and CN4 between the outdoor multi controller board and power circuit board Connect the CN2 and CN4 properly Replace them in case of a breakage The communication circ...

Page 33: ...n object Refrigerant shortage while in heating operation Refrigerant liquid accumulation in compressor while indoor unit is OFF thermo OFF Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 1102 Compressor temperature trouble Yes Yes No Yes Yes No No No Is 5101 displayed when restarted Is the outdoor stop valv...

Page 34: ...ue Is it free from any trace of over heating or burning Is there a resistance detected Is there a resistance detected Check the voltage and appearance of the outdoor multi controller circuit board Disconnect the thermistor wiring to check the resistance Disconnect the indoor LEV wiring and check the resistance Replace the outdoor multi controller circuit board Replace the thermistor Replace the in...

Page 35: ...door unit Malfunction or locked indoor fan motor Decreased airflow caused by defective inspection of outdoor temperature thermistor It detects lower temperature than actual temperature Indoor LEV performance failure Malfunction of fan driving circuit SV1 performance failure Defective high pressure sensor Defective high pressure sensor input circuit on outdoor multi controller circuit board Diagnos...

Page 36: ...an the filter Clogged filter No clog Continued from the previous page Is there dirt on the indoor heat exchanger Is the outdoor unit short cycled Is there dirt on the outdoor heat exchanger Are the pipes clogged or broken Wash the indoor heat exchanger Solve the short cycle Wash the outdoor heat exchanger Defective pipes dirty dirty short cycled no dirt no dirt no short cycle Continue to the next ...

Page 37: ...ny trace of over heating or burning Replace the indoor controller board Check the voltage and appearance of the indoor controller board Check the resistance of SV1 Chart 3 of 4 No No Yes Yes Yes Continued from the previous page Is there a resistance detected Is there a resistance detected Replace the TH7 Replace the indoor LEV Disconnect the indoor LEV wiring to check the resistance Continue to th...

Page 38: ... there a voltage detected Replace the SV1 Replace the 63HS Replace outdoor multi controller circuit board Yes No 63H equipped model 63HS non equipped 63HS equipped model 63H non equipped Is the connector for outdoor multi controller circuit board 63H disconnected or loose Reconnect the connector or connect it tightly Replace the outdoor multi controller circuit board Check the 63HS voltage Is ther...

Page 39: ...ion of TH4 Defective holder of TH4 Disconnection of LEV coil Disconnection of LEV connector LEV performance failure Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Chart 1 of 2 No Yes No Yes No Yes Is the TH4 wiring disconnected Is the resistance normal Is there any abnormality such as a half disconnection ...

Page 40: ...of 2 Is there a resistance detected Replace the indoor LEV No No Yes Yes No Yes Continued from the previous page Is the voltage normal Is it free from any trace of over heating or burning Is there a voltage detected Replace the indoor controller board Replace the 63HS Replace the outdoor multi controller circuit board Check the voltage and appearance of the indoor controller board Check the 63HS v...

Page 41: ...ance failure Gas leakage or shortage Defective 63HS TH3 Thermistor Outdoor liquid pipe TH7 Thermistor Ambient LEV Electronic expansion valve 63HS High pressure sensor Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Chart 1 of 2 Yes No No No No Yes Yes Yes Is the outdoor stop valve ball valve fully open Is t...

Page 42: ...ltage detected Is the voltage normal value Is it free from any trace of over heating or burning Is there a resistance detected Replace the outdoor multi controller circuit board Replace the 63HS Replace the indoor LEV Replace the indoor controller board Check the 63HS voltage Check the voltage and appearance of the outdoor multi controller circuit board Disconnect the indoor LEV wiring and check t...

Page 43: ...gas valve is blocked Mulfunction of outdoor LEV LEV1 blockage TH21 Indoor intake temperature thermistor TH22 Indoor liquid pipe temperature thermistor TH23 Indoor gas pipe temperature thermistor LEV Electronic expansion valve Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy v Is the outdoor stop valve liquid...

Page 44: ...ard Defective outdoor power circuit board TH21 Indoor intake temperature thermistor TH22 Indoor liquid pipe temperature thermistor TH23 Indoor gas pipe temperature thermistor Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Is the connector for outdoor multi controller circuit board or 4 way valve coil disco...

Page 45: ...isconnecting any connectors or replacing boards Diagnosis Remedy 2500 Water leakage No Yes Is there an adhesion of water drops on the drain sensor Is there a difficulty when pulling up the float switch manually Solve the problem No Yes Yes Yes No Check the temperature of TH22 23 if they are within appropriate range Are they within the range Does the drain pump work Is the drain level unusually hig...

Page 46: ...ed No abnormality The cause might be that the drain level was unusually high Restore the outdoor multi controller circuit board and operate the unit Drain sensor Disconnect the connector for drain sensor CN31 and short circuit between pins 1 2 on the indoor controller board then turn ON the emergency operation switch SWE Float switch Disconnect the connector for float switch CN4F and short circuit...

Page 47: ...isfied while the above mentioned detection is performed aThe drain sensor detects to be soaked in the water 10 times in a row bDetected that liquid pipe temperature room temperature 10 for 30 minutes constantly Notes 1 When the drain sensor detects to be NOT soaked in the water the detection record of a and b will be cleared 2 Drain pump abnormality above 1 3 is detected before it becomes an outdo...

Page 48: ...0 140 F 0 6 kΩ Temperature C Resistance k 0 20 20 40 60 80 0 2 1 3 4 5 6 7 8 9 10 Drain Sensor Drain sensor models Drain overflow protection 2502 Continued from the previous page No Is the check code 2502 still displayed No abnormality The cause might be that the drain level was unusually high Restore the drain sensor and operate the unit Disconnect the connector for drain sensor CN31 and short ci...

Page 49: ...er OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Chart 3 of 3 Yes Yes No Is 200 V AC output Check the branch connector for breakage or contact failure Replace the drain pump Check the voltage on both ends of the branch connector Continued from the previous page 49 OCH575 ...

Page 50: ...o detecting abnormality displays 2502 6Detection timing of forced outdoor unit stop Constantly detected during unit operation and stop 7Releasing of forced outdoor unit stop Reset power supply of both abnormal indoor unit and its outdoor unit in same refrigerant system Forced outdoor unit stop cannot be released by remote controller OFF Note Above mentioned 1 3 and 4 7 are detected independently 1...

Page 51: ... the moving parts does not work No abnormality The cause might be that the drain level was unusualy high Restore the float switch and operate the unit Open Short Replace the float switch Disconnect the connector for float switch CN4F and short circuit between pins 3 4 on the indoor controller board then start cooling operation Continued from the previous page No Yes No No Yes Yes Yes Is the connec...

Page 52: ... Diagnosis Remedy Yes Temperature C Resistance k 0 20 20 40 60 80 0 2 1 3 4 5 6 7 8 9 10 Drain Sensor How to check the resistance Disconnect the connector for drain sensor from the indoor controller board to check the resistance using a tester Temperature Resistance 0 32 F 6 0 kΩ 10 50 F 3 9 kΩ 20 68 F 2 6 kΩ 25 77 F 2 2 kΩ 30 86 F 1 8 kΩ 40 104 F 1 3 kΩ 60 140 F 0 6 kΩ No Yes No Check the drain s...

Page 53: ...e connecting disconnecting any connectors or replacing boards Diagnosis Remedy 4100 Compressor current interruption Locked compressor Chart 1 of 2 Yes Yes Yes No No No Is the stop valve liquid gas fully open Is the power supply voltage normal Is it connected properly Open the stop valve liquid gas fully Ensure power supply from the facility Connect the wiring properly then turn the power back ON C...

Page 54: ...g boards Diagnosis Remedy Chart 2 of 2 Yes Yes No No Are they set properly Is the compressor faulty grounded Set the model selection switch correctly then restart Replace the compressor Defective compressor Replace the outdoor power circuit board Defective outdoor power circuit board Check whether the compressor is faulty grounded or not Continued from the previous page 54 OCH575 ...

Page 55: ...cuit board Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 4210 Compressor overcurrent interruption Chart 1 of 2 Yes Yes Yes No No No Is the stop valve liquid gas fully open Is the power supply voltage normal Are they set properly Open the stop valve liquid gas fully Check the power supply facility check fo...

Page 56: ...short cycled Are the voltage among the phases U V V W and W U different Does it operate normally Check the DC fan motor Remove factor s causing the short cycle Replace the compressor Replace the outdoor power circuit board Complete Check the operation of indoor outdoor fan motors Check for indoor outdoor short cycle Disconnect the compressor wiring from the outdoor power circuit board then check t...

Page 57: ...hart 1 of 2 No No No No No Yes Yes Yes Yes Yes 6 3 7 8 Is there any abnormality on wirings Which sub code is displayed Does a DC bus voltage raise to approx 400 V at PAM driving Is there any abnormality on PAM wirings Is there any abnormality at the PAM circuit on the outdoor power circuit board Is there any abnormality at the PAM power supply circuit on the outdoor multi controller circuit board ...

Page 58: ...ltage normal The difference of the voltage between the one read by the LED1 and 2 and the one at the testpoints listed above is large Malfunction of noise filter ACCT Replace the outdoor power circuit board Defective outdoor power circuit board Decrease of power supply voltage L1 open phase Replace the outdoor power circuit board Defective outdoor power circuit board Replace the outdoor power circ...

Page 59: ...eat sink temperature trouble 0 32 F 180 kΩ 25 77 F 50 kΩ 50 122 F 17 kΩ 70 158 F 8 kΩ 90 194 F 4 kΩ No Yes No No Yes Yes No No Yes Yes Is 5110 displayed when restarted Does the fan rotate during compressor operation Is there any obstacle which blocks an airflow around the Heat sink Is there any abnormality such as a disconnection looseness or breakage Is the resistance normal Refer to the diagnosi...

Page 60: ... connectors or replacing boards Diagnosis Remedy 4250 Power module trouble Yes Yes Yes Yes Yes No No No No Is the stop valve liquid gas fully open Is the power supply voltage normal Are the wirings normal Does it operate normally Open the stop valve liquid gas fully Ensure power supply from facility Connect the compressor wiring U V and W phase properly then turn the power back ON Replace the outd...

Page 61: ...elting Is there any abnormality such as a disconnection looseness or breakage Is the voltage normal Replace the outdoor multi controller circuit board Replace the fan motor Connect the wiring connector properly Replace it in case of a breakage Replace the outdoor multi controller circuit board Replace the fan motor Check the fuse on the outdoor multi controller circuit board Check the fan motor co...

Page 62: ...ature thermistor TH4 open short The black square indicates a switch position Detected in outdoor unit No Yes Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace the connector in case of a breakage Replace the thermistor Replace the outdoor multi contro...

Page 63: ...e temperature thermistor TH6 open short The black square indicates a switch position Detected in outdoor unit No Yes Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in case of a breakage Replace the thermistor Replace the outdoor multi controlle...

Page 64: ...le TH23 Detected in indoor unit No No Yes Yes Is it connected properly Is the resistance of the thermistor normal Connect the wiring properly Replace the thermistor Replace the indoor controller board Check the connection of thermistor wiring for looseness or disconnection Thermistors for low temperature Check code and trouble Check code Thermistor Connector Trouble 5101 TH21 CN20 Air inlet thermi...

Page 65: ... Outdoor liquid pipe temperature thermistor TH3 open short The black square indicates a switch position SW1 Setting ON OFF Display on LED1 2 Unit 99 9 999 9 4 1 2 5 6 7 8 3 No Yes Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in case of a brea...

Page 66: ...8 3 No Yes Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in case of a breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected ...

Page 67: ...onnectors or replacing boards Diagnosis Remedy The black square indicates a switch position No Yes Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in case of a breakage Replace the thermistor Replace the outdoor multi controller circuit board Ma...

Page 68: ...9 9 4 1 2 5 6 7 8 3 No Yes Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected resistance normal Is the detected temperature normal Connect the wiring connector properly Replace it in case of a breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failu...

Page 69: ...ller circuit board Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy The black square indicates a switch position 63HS High pressure sensor SW1 Setting ON OFF Display on LED1 2 Unit 99 9 999 9 kgf F 4 1 2 5 6 7 8 3 No Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the ...

Page 70: ...OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy The black square indicates a switch position 63LS Low pressure sensor No Yes Yes No No Is there any abnormality such as a disconnection looseness or breakage Is the detected internal pressure normal Is the detected pressure normal Connect the wiring connector properly Replace it in case of a breakage Check the ...

Page 71: ...ng boards Diagnosis Remedy 5701 Models equipped with the float switch Contact failure of drain float switch Models equipped with the float switch Check if it is short circuited between pins 3 4 of the connector CN4F on the float switch side Replace the indoor controller board No No Yes Yes Is the check code 5701 still displayed Is it short circuited No abnormality A connector or wiring contact fai...

Page 72: ...connectors or replacing boards Diagnosis Remedy 6600 Duplex address error No Yes Yes No Is there any unit with the same address Does it operate normally Correct the address and turn the power OFF of indoor outdoor unit Fresh Master or Lossnay simultaneously for 2 minutes or more then turn the power back ON Malfunction of sending receiving circuit on indoor outdoor unit is suspected There is no abn...

Page 73: ...Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 6602 Transmission processor H W error Yes Yes No No A wiring work was performed while the power OFF Does it operate normally If the wiring work was performed while the power ON turn the power OFF of indoor outdoor unit Fresh Master or Lossnay simultaneously fo...

Page 74: ...onnect disconnect transmission from to control system and centralized control system Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 6603 Transmission bus BUSY error No Yes Yes Yes No No Is the transmission line miswired Is the transmission line miswired Does it operate normally Correct the wiring then turn...

Page 75: ...ectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 6606 Signal communication error with transmission processor Yes No Does it operate normally Replace the controller Defect of error source controller There is no abnormality on the AC unit It might be caused by an external noise so check the transmission line to remove the fac...

Page 76: ...on of sending receiving circuit on indoor outdoor unit The cause of displayed address and attribute is on the indoor unit side An abnormality detected by the remote controller if receiving no ACK when sending data from the remote controller to the indoor unit While operating with multi refrigerant system indoor units an abnormality is detected when the indoor unit transmit signal to the remote con...

Page 77: ...bnormality detected by the indoor unit if receiving no ACK when the indoor unit transmit signal to the Lossnay An abnormality is detected when the indoor unit transmits signal to Lossnay while the Lossnay is turned OFF While the indoor unit is operating with the other refrigerant Lossnay an abnormality is detected when the indoor unit transmits signal to the Lossnay while the outdoor unit with the...

Page 78: ...the procedure 1 Connect the transmission line properly then perform the procedure 1 Is the abnormality reproduced Is it set properly There is no abnormality on the AC unit It might be caused by an external noise so check the transmission line to remove the factor s Set the address properly then perform the procedure 1 Check the address switch on the source of abnormality Check the transmission lin...

Page 79: ...r board which the displayed address attribute belongs to Continued from the previous page Defective outdoor multi controller circuit board repeater circuit on the outdoor unit is suspected Replace the outdoor multi controller circuit board one by one then check for normal operation Delete the unnecessary address using a manual setting function on the remote controller Only for operating in a syste...

Page 80: ...ards Diagnosis Remedy No response frame error Yes Yes Yes Yes No No No No Does it operate normally The transmission line is connected properly It is not exceeding the tolerance Is correct kind of transmission line used Replace the controller board Defect of the controller which the displayed address attribute belong to Connect the transmission line properly Correct it within the tolerance Replace ...

Page 81: ...er transmitting error caused by noise interference Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy Check the remote controller for main sub setting Conduct the Remote Controller Diagnosis 2 or more times Is RC NG displayed Turn the power back ON No Is RC 6832 or ERC01 ERC66 displayed No abnormality It might...

Page 82: ...ive error Chart 2 of 2 No abnormality It might be caused by an external noise so check the transmission line to remove the factor s No Yes Is the wiring connected properly meeting the condition Connect the wiring properly as specified in the chapter Electrical Work in the indoor unit Installation Manual Refer to the chapter Electrical Work Continued from the previous page 82 OCH575 ...

Page 83: ...osis more than 2 times No No Is the check code 6832 or 6833 still displayed Is there only 1 remote controller set as the main controller Set one remote controller to main remote controller and the other to sub Disconnect and reconnect the connector CN3A then turn the power back ON Note It takes 6 sec at maximum until the result is displayed No abnormality A connector or wiring contact failure is s...

Page 84: ...d error Chart 2 of 2 No abnormality It might be caused by an external noise so check the transmission line to remove the factor s No Yes Is the wiring connected properly meeting the condition Connect the wiring properly as specified in the chapter Electrical Work in the indoor unit Installation Manual Refer to the chapter Electrical Work Continued from the previous page 84 OCH575 ...

Page 85: ...power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7100 Total capacity error No Yes Yes No No Yes Is it set properly Is it set properly Is the total under 130 of the number of outdoor unit model name Check the capacity code switch SW2 on the indoor controller board on the connected indoor unit Check the model selection switch SW4 on the outdoor multi cont...

Page 86: ... model P15 to P250 model code 3 to 50 Diagnosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7101 Capacity code error Yes No Is it set properly Set the switch properly The model code of the connected indoor unit can be displayed by an operation of SW1 on the outdoor unit Check the model selection switch SW4 on the...

Page 87: ...nosis of defectives Make sure to turn the power OFF before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7102 Connecting excessive number of units Yes No No Yes Is an indoor unit connected Does it exceed the limit Connect indoor unit Connect less number of units than the limit The model code of the connected indoor unit can be displayed by an operation of SW1 on the ...

Page 88: ...F before connecting disconnecting any connectors or replacing boards Diagnosis Remedy 7105 Address setting error Yes No Is the address setting correct Set the address properly then turn the power OFF of indoor outdoor unit Fresh Master Lossnay and remote controller simultaneously for 2 minutes or more and turn the power back ON Replace the outdoor multi controller circuit board Check whether the o...

Page 89: ...transmitting receiv ing circuit is defective The remote controller must be replaced with a new one Where the remote controller is not defective but cannot be operated Error display 2 E3 6833 or 6832 flashes Transmissionisnotpossible There might be noise or interference on the transmission path or the indoor unit or other remote controllers are defective Check the transmission path and other contro...

Page 90: ...on the remote controller display if the correct voltage 8 5 12 V DC is not supplied to the remote control ler If this is the case check the remote controller wiring and indoor units OK No problems are found with the remote controller Check other parts for problems E3 6832 There is noise on the transmission line or the indoor unit or another remote controller is faulty Check the transmission line a...

Page 91: ...d solution Though the content of operation is displayed on the remote controller some indoor units do not operate is not displayed on the remote controller MA remote controller is not fed PLEASE WAIT keeps being dis played or it is displayed periodically PLEASE WAIT is usually dis played about 3 minutes after the power supply of the outdoor unit is on The remote controller does not operate though ...

Page 92: ...ward blow in cooling in cause the downward blow operation has been continued for 1 hour At defrosting in heating hot adjusting and thermostat OFF it automatically changes over to horizontal blow Ultra low speed operation is commenced at thermostat OFF Light air automatically change over to set value by time or piping temperature at thermostat ON The fan is to stop during defrosting Fan is to run f...

Page 93: ... same mode Cannot be set when the centralized control is ON 6 Switching the Silent Demand mode Demand control Silent mode Can be set when OFF or during operation About the Silent mode Demand control setting refer to 8 6 OUTDOOR UNIT INPUT OUTPUT CONNECTOR SW3 Trial operation 1 ON OFF from outdoor unit ON OFF Any time after the power is turned ON Initial settings 2 Mode setting Heating Cooling SW4 ...

Page 94: ...the target discharge pressure Pdm Enable Normal To raise the performance by setting the PDm higher during HEAT operation Power consumption is raised due to a higher frequency The performance would not be raise at the maximum operating frequency 7 Switching 1 the target evaporation temperature ETm Enable Normal To raise reduce the performance by changing the target ETm during COOL operation Switch ...

Page 95: ...e operation Outdoor controller board DIP SW2 6 SW1 SW2 Function Demand control OFF ON ON OFF ON OFF OFF ON OFF ON ON 100 75 50 0 Normal Stop A Distant control board B Relay circuit C External output adapter PAC SA88HA E D Outdoor unit control board A Remote control panel B Relay circuit C External input adapter PAC SC36NA E D Outdoor unit control board E Relay power supply F Procure locally G Max ...

Page 96: ...e 20 Solenoid valve coil 4 way valve 21S4 Motor for compressor MC Measure the resistance between the terminals with a tester At the ambient temperature 20 Normal 1182 5 83 Abnormal Open or short Solenoid valve coil Bypass valve SV1 Linear expansion Valve LEV A Linear expansion Valve LEV B Refer to the next page Fan motor MF1 MF2 Measure the resistance between the terminals with a tester Winding te...

Page 97: ...cuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC 310 340 V DC TEST POINT 2 VCC between 5 and 4 of the fan connector VCC 15 V DC No NG NG Wiring contact check Contact of fan motor connector CNF1 2 Fuse check Check the fuse F500 on outdoor multi controller circuit board Recover wiring Replace the outdoor multi controller circuit board Replace the fan motor Replace the outdoor mul...

Page 98: ...10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 500 400 300 200 100 0 25 50 75 100 120 Temperature Resistance k 0 5 2 5 5 2 5 4 5 Vout V PRESSURE MPa 3 2 1 WHT BLU BLK SENSOR 5 V DC GND 63HS Vout MICRO PROCESSOR OUTDOOR MULTI CONTROLLER CIRCUIT BOARD 3 1 5 V DC 2 1 Output Vout DC HIGH PRESSURE SENSOR 0 180 k 25 50 k 50 17 k 70 8 k 90 4 k Thermistor R50 17 k 2 B constant 4170 3 Rt 17...

Page 99: ...f C82A 15 V DC Same as CNF1 2 5 4 VSP Voltage between pins of C515 and C516 0 V DC when stopped 1 6 5 V DC when operated Same as CNF1 2 6 4 CNF1 2 Connect to fan motors 1 4 310 340 V DC 5 4 15 V DC 6 4 0 6 5 V DC 7 4 15 V DC when stopped 0 15 V DC pulse when operated VDC TEST POINT1 Voltage between pins of C510 310 340 V DC Same as CNF1 2 1 4 VFG TEST POINT4 Voltage between pin3 and pin4 of PC511 ...

Page 100: ... Check of DIP IPM P2 U P2 V P2 W N2 U N2 V N2 W PUMY P200YKM PUMY P200YKM BS Note The marks L1 L2 L3 N1 N2 P1 P2 U V and W shown in the diagram are not actually printed on the board CN5 Detection of primary current Connect to the outdoor noise filter circuit board CNCT CN4 Connect to the outdoor multi controller circuit board CN4 W N2 N1 P2 P1 L1 L2 L3 U V TAB connecter on X52A Connect to the RS r...

Page 101: ...N2 Connect to the outdoor multi controller circuit board 1 2 24 30 V DC 3 4 24 30 V DC CN1 Connect to the outdoor noise filter circuit board 1 3 220 240 V AC TB1 Connect to the electrical parts box PUMY P200YKM PUMY P200YKM BS OCH575 ...

Page 102: ...Connect to the outdoor multi controller circuit board CNDC LO1 LO2 LO3 POWER SUPPLY LO1 LO2 LO2 LO3 LO3 LO1 380 400 415 V AC OUTPUT Connect to the outdoor power circuit board and ACL TB L1 TB L2 TB L3 CNCT Primary current Connect to the outdoor power circuit board CN5 CNL Connect to the ACL4 CNAC1 220 230 240 V AC Connect to the outdoor M NET power circuit board CN1 GD3 Connect to the electrical p...

Page 103: ...bnormality delay TH8 abnormality delay Display all abnormalities remaining in abnormality delay 9 10010000 Abnormality delay history 2 Heat sink overheating delay Overcurrent interception delay Voltage abnormality delay Insufficient refrigerant amount abnormality delay Current sensor abnormality delay Low pressure abnormality 63HS abnormality delay start over current interception abnormality delay...

Page 104: ...n SHd decrease prevention Min Sj correction depends on Td Min Sj correction depends on Shd LEV opening correction depends on Pd LEV opening correction depends on Td Correction of high compression ratio prevention 47 11110100 Discharge pressure control Discharge pressue control Compressor temperature control Discharge temp heating backup Pd abnormality control heating Pd Back up heating Freeze prev...

Page 105: ...target 69 10100010 IC1 LEV Opening pulse 0 2000 Display of opening pulse of indoor LEV 70 01100010 IC2 LEV Opening pulse 71 11100010 IC3 LEV Opening pulse 72 00010010 IC4 LEV Opening pulse 73 10010010 IC5 LEV Opening pulse 74 01010010 High pressure sensor Pd kgf cm2 99 9 999 9 Display of outdoor subcool SC data and detection data from high pressure sensor and each thermistor 75 11010010 TH4 Td C 7...

Page 106: ...nking Stop fan light off 115 11001110 Indoor unit operation display No 9 to 12 unit No 9 unit operation No 10 unit operation No 11 unit operation No 12 unit operation Thermo ON light on Thermo OFF light off 116 00101110 Indoor unit operation mode No 9 unit OFF FAN Cooling thermo ON Cooling thermo OFF Heating thermo ON Heating thermo ON Display of operation mode of indoor units 117 10101110 Indoor ...

Page 107: ...ata at time of abnormality delay C 141 10110001 OC SC cooling at time of abnormality delay C 142 01110001 IC1 SC SH at time of abnormality delay C 143 11110001 IC2 SC SH at time of abnormality delay C 144 00001001 IC3 SC SH at time of abnormality delay C 145 10001001 IC4 SC SH at time of abnormality delay C 146 01001001 IC5 SC SH at time of abnormality delay C 147 11001001 Indoor SC SH at abnormal...

Page 108: ...isplay of version data of ROM 171 11010101 ROM type Display of ROM type 172 00110101 Check sum mode Display of check sum code of ROM 173 10110101 TH23 No 9 indoor unit 99 9 999 9 Short Open 99 9 or 999 9 174 01110101 TH23 No 10 indoor unit 175 11110101 TH23 No 11 indoor unit 176 10001101 TH23 No 12 indoor unit 177 10001101 TH22 No 9 indoor unit 178 01001101 TH22 No 10 indoor unit 179 11001101 TH22...

Page 109: ... of abnormality 203 11010011 TH3 sensor data at time of abnormality 204 00110011 TH8 sensor data at time of abnormality 205 10110011 OC SC cooling at time of abnormality 99 9 999 9 Display of data from high pressure sensor all thermistors and SC SH at time of abnormality 206 01110011 IC1 SC SH at time of abnormality 207 11110011 IC2 SC SH at time of abnormality 208 00001011 IC3 SC SH at time of ab...

Page 110: ...0110111 IC7 LEV opening pulse abnormality delay 237 10110111 IC8 LEV opening pulse abnormality delay 238 01110111 IC6 SC SH at time of abnormality delay C 99 9 999 9 Display data from high pressure sensor all thermistors and SC SH at time of abnormality 239 11110111 IC7 SC SH at time of abnormality delay C 240 00001111 IC8 SC SH at time of abnormality delay C 241 10001111 IC6 LEV opening pulse at ...

Page 111: ...polychloroprene sheathed flexible cord design 60245 IEC57 For example use wiring such as YZW 6 Install an earth longer than other cables Warning Be sure to use specified wires to connect so that no external force is imparted to terminal connections If connections are not fixed firmly it may cause heating or fire Be sure to use the appropriate type of overcurrent protection switch Note that generat...

Page 112: ... EF VE MSY GE VA MSY GH MSZ GE VA MSZ SF VA MSZ SF VE MSZ EF VE MSZ FH VE 6 8 2 4 Type 2 MFZ KJ VE 7 4 Type 3 Connection kit PAC LV11M 3 5 Indoor unit V1 V2 Type 1 PMFY VBM PLFY VBM PEFY VMS1 PCFY VKM PKFY VHM PKFY VKM PFFY VKM 19 8 2 4 Type 2 PLFY VCM 9 9 Type 3 PKFY VBM 3 5 Type 4 PEFY VMA 38 1 6 Type 5 PEFY VMHS 46 6 4 8 Type 6 PLFY VLMD PEFY VMH PEFY VMR PDFY VM PFFY VLEM PFFY VLRM 0 0 C Multi...

Page 113: ...cables Shielding wire 2 core CVVS CPEVS or MVVS Cable diameter More than 1 25 mm2 Maximum wiring length Within 200 m 2 M NET Remote control cables Kind of remote control cable Shielding wire 2 core CVVS CPEVS or MVVS Cable diameter 0 5 to 1 25 mm2 Remarks When 10 m is exceeded use a cable with the same specifications as transmission line wiring 3 MA Remote control cables Kind of remote control cab...

Page 114: ...he current through the outdoor unit will vary depending on the total capacity of the selected indoor units Page numbers in this technical manual Power consumption Total power consumption of each indoor unit See the technical manual of each indoor unit 1 Power consumption of outdoor unit Standard capacity table Refer to 4 3 2 Total power consumption of system See the technical manual of each indoor...

Page 115: ...t amount plate on the outdoor unit Calculation of additional refrigerant charge Calculate the additional charge using the liquid pipe size and length of the extended piping and total capacity of connected indoor units Calculate the additional refrigerant charge using the procedure shown to the right and charge with the additional refrigerant For amounts less than 0 1 kg round up the calculated add...

Page 116: ...e CONNECTION KIT when selecting the pipe size and piping length Additional refrigerant charge Refrigerant for the extended piping is not included in the outdoor unit when the unit is shipped from the factory Therefore charge each refrigerant piping system with additional refrigerant at the installation site In addition in order to carry out service enter the size and length of each liquid pipe and...

Page 117: ...e Refrigerant amount plate on the outdoor unit Calculation of additional refrigerant charge Calculate the additional charge using the liquid pipe size and length of the extended piping and total capacity of connected indoor units Calculate the additional refrigerant charge using the procedure shown to the right and charge with the additional refrigerant For amounts less than 0 1 kg round up the ca...

Page 118: ...ations 1 and 2 to calculate the refrigerant concentration If the calculation results do not exceed the maximum concentration perform the same calculations for the larger second and third room etc until it has been determined that nowhere the maximum concentration will be exceed Indoor unit All refrigerant of this system will leak out to this room if there is leakage at this indoor unit Direction o...

Page 119: ... outdoor multi controller circuit board Diagram symbol in the connector housing Fan motor CNF1 CNF2 Thermistor HIC pipe TH2 Thermistor Outdoor liquid pipe TH3 Thermistor Compressor TH4 Thermistor Suction pipe Ambient Outdoor TH6 7 High pressure switch 63H High pressure sensor 63HS Low pressure sensor 63LS 4 way valve 21S4 Bypass valve SV1 Electronic expansion valve CNLVA CNLVB Pull out the disconn...

Page 120: ...trical parts box 4 Pull out the thermistor Suction pipe TH6 from the sen sor holder Note When replacing thermistor Suction pipe TH6 replace it together with thermistor Ambient TH7 since they are combined together Refer to procedure No 5 below to remove thermistor Ambient TH7 Electrical parts box Clamps 5 Removing the thermistor Ambient TH7 1 Remove the service panel See Photo 1 2 Remove the top pa...

Page 121: ...multi controller circuit board in the electrical parts box 4 way valve OPERATING PROCEDURE PHOTOS Photo 9 1 4 way valve coil fixing screw 8 Removing the 4 way valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 5 4 Remove 3 valve bed fixing screws 4 10 and 4 ball valve and stop valve fixing screws 5 16 and then remove the valv...

Page 122: ...k cover panel fixing screws 5 12 and remove the back cover panel 5 Remove 3 right side panel fixing screws 5 o 12 in the rear of the unit and remove the right side panel 6 Disconnect the connector 63LS blue on the outdoor multi controller circuit board in the electrical parts box 7 Remove the electrical parts box See Photo 5 8 Recover refrigerant 9 Remove the welded part of low pressure sensor 12 ...

Page 123: ... Remove the service panel See Photo 1 2 Disconnect the lead wires from the reactor See Photo5 3 Disconnect the connectors of reactor on the bottom plate of the electrical parts box See Photo13 4 Remove 4 screws 2 on the bottom plate of the electrical parts box See Photo 13 5 Remove the reactor Bottom plate of electrical parts box OCH575 ...

Page 124: ...inlet and outlet and then remove the compressor Note Recover refrigerant without spreading it in the air Photo 14 Compressor MC Valve bed Valve bed fixing screw Valve bed fixing screws Compressor fixing nuts 15 Removing the accumulator 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 12 and remove the front cover panel See Photo...

Page 125: ...125 OCH575 ...

Page 126: ...ELECTRIC CORPORATION Distributed in Oct 2014 No OCH575 Made in Japan New publication effective Oct 2014 Specifications are subject to change without notice HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN TM ...

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