Mitsubishi Electric PUMY-P200YKM2 Technical & Service Manual
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Mitsubishi Electric PUMY-P200YKM2 Technical & Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
<Outdoor unit>
[Model Name]
[Service Ref.]
PUMY-P200YKM2
PUMY-P200YKM2
PUMY-P200YKM2R1
Salt proof model
PUMY-P200YKM2-BS
PUMY-P200YKM2-BS
PUMY-P200YKM2R1-BS
CONTENTS
1. SAFETY PRECAUTION ..................................... 2
2. OVERVIEW OF UNITS ....................................... 5
3. SPECIFICATIONS .............................................. 9
4. DATA ................................................................. 10
5. OUTLINES AND DIMENSIONS ....................... 18
6. WIRING DIAGRAM ........................................... 19
8. TROUBLESHOOTING ...................................... 38
9. ELECTRICAL WIRING ................................... 115
10. REFRIGERANT PIPING TASKS .................... 121
11. DISASSEMBLY PROCEDURE ....................... 128
Model name
indication
OUTDOOR UNIT
Revision:
• PUMY-P200YKM2R1 and
• Some descriptions have
OCH675 REVISED EDITION-C
is void.
Note:
• This service manual
PARTS CATALOG (OCB675)
HFC
utilized
R410A
June 2019
No. OCH675
REVISED EDITION-D
PUMY-P200YKM2R1-BS
have neen added.
been modified in REVISED
EDITION-D.
describes technical data of
the outdoor units only.

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Summary of Contents for Mitsubishi Electric PUMY-P200YKM2

  • Page 1: Table Of Contents

    No. OCH675 REVISED EDITION-D TECHNICAL & SERVICE MANUAL <Outdoor unit> Revision: • PUMY-P200YKM2R1 and [Model Name] [Service Ref.] PUMY-P200YKM2R1-BS PUMY-P200YKM2 PUMY-P200YKM2 have neen added. • Some descriptions have been modified in REVISED PUMY-P200YKM2R1 EDITION-D. OCH675 REVISED EDITION-C is void. Salt proof model...

  • Page 2: Safety Precaution

    SAFETY PRECAUTION 1-1. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Preparation before the repair service Precautions during the repair service • Do not perform the work involving the electric parts • Prepare the proper tools. with wet hands. •...
  • Page 3 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them. [2] Additional refrigerant charge When charging directly from cylinder (1) Check that cylinder for R410A on the market is a syphon type.
  • Page 4 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 5: Overview Of Units

    OVERVIEW OF UNITS 2-1. SYSTEM CONSTRUCTION Outdoor unit PUMY-P200YKM2(R1) PUMY-P200YKM2(R1)-BS Capacity Type 10 to Type 200 Applicable Number of units 1 to 12 unit indoor unit 50 to 130% of outdoor unit capacity Total system capacity range CMY-Y64-G-E CMY-Y62-G-E CMY-Y68-G-E...
  • Page 6 2-2. SYSTEM CONSTRUCTION (BRANCH BOX SYSTEM) Outdoor unit PUMY-P200YKM2(R1) PUMY-P200YKM2(R1)-BS kW unit: Type 15 to Type 100 Capacity Applicable indoor unit Number of units 2 to 8 units 50 to 130 % of outdoor unit capacity (11.2 to 29.1 kW)
  • Page 7 2-3. SYSTEM CONSTRUCTION (MIXED SYSTEM) Outdoor unit PUMY-P200YKM2(R1) PUMY-P200YKM2(R1)-BS CITY MULTI indoor unit Type 10 to Type 200 Capacity kW unit: Type 15 to Type 100 Via branch box Applicable Via branch box CITY MULTI indoor indoor unit Number of units...
  • Page 8 2-4. SYSTEM SPECIFICATIONS (1) Outdoor Unit PUMY-P200YKM2(R1) Service Ref. PUMY-P200YKM2(R1)-BS Cooling (kW) 22.4 Capacity Heating (kW) 25.0 Compressor (kW) 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.

  • Page 9: Specifications

    SPECIFICATIONS Service Ref. PUMY-P200YKM2(R1), PUMY-P200YKM2(R1)-BS Power source 3-phase 380-400-415 V, 50 Hz 22.4 Cooling capacity kcal/h (Nominal) 19,300 76,400 Btu/h Power input 6.05 Current input 9.88- 9.39- 9.05 kW/kW 3.70 15 to 24°C Temp. range of Indoor temp. W.B. *3,*4 −5 to 52°C...

  • Page 10: Data

    DATA 4-1. SELECTION OF COOLING/HEATING UNITS <Cooling> Design Condition Outdoor Design Dry Bulb Temperature 38ºC 18.0 kW Total Cooling Load Room1 Indoor Design Dry Bulb Temperature 27ºC Indoor Design Wet Bulb Temperature 20ºC 8.0 kW Cooling Load Room2 Indoor Design Dry Bulb Temperature 24ºC Indoor Design Wet Bulb Temperature 18ºC...
  • Page 11 <Heating> Design Condition Outdoor Design Wet Bulb Temperature 2ºC 20.5 kW Total Heating Load Room1 Indoor Design Dry Bulb Temperature 21ºC 9.5 kW Heating Load Room2 Indoor Design Dry Bulb Temperature 23ºC 11.0 kW Heating Load <Other> Indoor/Outdoor Equivalent Piping Length 50 m Capacity of indoor unit Unit: kW...
  • Page 12 4-2. CORRECTION BY TEMPERATURE The outdoor units have varied capacity at different designing temperature. Using the nominal cooling/heating capacity value and the ratio below, the capacity can be observed at various temperature. <Cooling> Figure 7 Indoor unit temperature correction To be used to correct indoor unit capacity only Indoor Temperature [°CW.B.] Figure 8 Outdoor unit temperature correction To be used to correct outdoor unit capacity only...
  • Page 13 <Heating> Figure 9 Indoor unit temperature correction To be used to correct indoor unit capacity only Indoor Temperature [°C D.B.] Figure 10 Outdoor unit temperature correction To be used to correct outdoor unit capacity only 20°C D.B -5.0 10.0 15.0 -20.0 -15.0 -10.0...
  • Page 14 4-3. STANDARD CAPACITY DIAGRAM Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on "4-1. SELECTION OF COOLING/HEATING UNITS". 4-3-1. PUMY-P200YKM2 PUMY-P200YKM2-BS <Cooling> PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS 25.0 20.0 15.0...
  • Page 15 4-3-2. PUMY-P200YKM2 PUMY-P200YKM2-BS <Heating> PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS 30.0 25.0 20.0 15.0 10.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 Total capacity of indoor units(kW) 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 Total capacity of indoor units(kW) 12.0...
  • Page 16 4-4. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING (1) During cooling, obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total in-use indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 11. Then multiply by the cooling capacity from Figure 7 and 8 in "4-2.
  • Page 17 4-5. NOISE CRITERION CURVES PUMY-P200YKM2 SPL(dB) MODE LINE PUMY-P200YKM2R1 COOLING HEATING PUMY-P200YKM2-BS COOLING SILENT MODE PUMY-P200YKM2R1-BS NC-70 NC-60 MICROPHONE NC-50 UNIT NC-40 1.5 m NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS GROUND NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz 4-6.

  • Page 18: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUMY-P200YKM2 PUMY-P200YKM2-BS Unit: mm PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS OCH675D...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM PUMY-P200YKM2 PUMY-P200YKM2R1 PUMY-P200YKM2-BS PUMY-P200YKM2R1-BS OCH675D...

  • Page 20: Necessary Conditions For System Construction

    NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 7-1. TRANSMISSION SYSTEM SETUP OCH675D...
  • Page 21 7-2. Special Function Operation and Settings (for M-NET Remote Controller) • It is necessary to perform “group settings” and “paired settings” at making group settings of different refrigerant systems (multiple outdoor unit). (A) Group settings: Enter the indoor unit controlled by the remote controller, check the content of entries, and clear entries, etc.
  • Page 22 (2) Address check: Refer to section (1) regarding address entry. a) In making group settings: • Turning off the remote controller: Press the remote controller's ON/OFF button to stop operation (the indicator light will go off). • Locate the indoor unit address display mode: Press the FILTER and k buttons on the remote controller simultaneously and hold for 2 seconds.
  • Page 23 7-3. REFRIGERANT SYSTEM DIAGRAM 7-3-1. Connection without Branch box PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS Thermistor(TH7) Check valve <Ambient> <High pressure> Service port 4-way valve Strainer Refrigerant gas pipe Distributor High pressure sensor(63HS) Ball valve Check valve Solenoid <Low pressure> Oil separator...
  • Page 24 7-3-2. Connection with Branch box Selecting size ■ In case of using 1-branch box L [ 20 m ø9.52 Liquid The piping connection size dif- Flare connection employed. (No brazing) (mm) fers according to the type and L > 20 m ø12.7 capacity of indoor units.
  • Page 25 7-3-3. Mixed system (CITY MULTI indoor units and M, S, P series indoor units (Via Branch box) Pipe size System pipe size A liquid pipe B Gas pipe A Outdoor Unit L1 [ 60 m or L2 [ 20 m ø9.52 mm ø19.05 mm B First joint...
  • Page 26 7-4. SYSTEM CONTROL 7-4-1. Example for the System • Example for wiring control cables, wiring method and address setting, permissible lengths, and the prohibited items are listed in the standard system with detailed explanation. A. Example of an M-NET remote controller system (address setting is necessary.) Example of wiring control cables Wiring Method and Address Setting a.
  • Page 27 • Name, Symbol and the Maximum Remote controller Units for Connection Symbol Maximum units for connection Name Outdoor unit — Indoor unit M-IC Refer to "2-1. SYSTEM CONSTRUCTION" M-NET remote Maximum 2 RC for 1 indoor unit, Maximum 12 RC for 1 OC controller Permissible Lengths Constraint items...
  • Page 28 B. Example of a group operation system with 2 or more outdoor units and an M-NET remote controller. (Address settings are necessary.) (51) M-IC M-IC M-IC M-IC (01) (02) (05) (06) M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S...
  • Page 29 • Name, Symbol, and the Maximum Units for Connection [ 500 m (1.25 mm²) • Longest length via outdoor units : L [ 200 m (1.25 mm²) • Longest transmission cable length : L [ 10 m (0.5 to 1.25 mm²) •...
  • Page 30 C. Example of an MA remote controller system (address setting is not necessary.) NOTE : In the case of same group operation, need to set the address that is only main indoor unit. Example of wiring control cables Wiring Method and Address Setting a.
  • Page 31 Permissible Lengths Constraint items Longest transmission cable length: The MA remote controller and the M-NET remote controller cannot be used together with the indoor unit of the same group. [ 200 m (1.25 mm²) MA remote controller cable length: [ 200 m (0.3 to 1.25 mm²) (00) M-IC M-IC...
  • Page 32 D. Example of a group operation with 2 or more outdoor units and an MA remote controller. (Address settings are necessary.) M-IC M-IC M-IC M-IC (51) (01) (02) (05) (06) TB15 TB15 TB15 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S...
  • Page 33 • Name, Symbol, and the Maximum Units for Connection [ 500 m (1.25 mm² more) Longest length via outdoor unit (M-NET cable): L and L [ 200 m (1.25 mm² or more) Longest transmission cable length (M-NET cable): L and L and L and L Remote controller cable length: m1 and m1+m2+m3 and m1+m2+m3+m4 [ 200 m (0.3 to 1.25 mm²)
  • Page 34 E. Example of a system using Branch Box and A-Control indoor unit TB3A TB5/TB15 Branch Box A-IC MA-RC (01) (51) TB3B TB5/TB15 M1 M2 S M1 M2 S A-IC MA-RC (02) TB3C TB5/TB15 A-IC MA-RC (03) (01) TB3D A-IC WL-RC (04) TB3E A-IC...
  • Page 35 • Name, Symbol, and the Maximum Units for Connection [500 m (1.25 mm² or more) Longest length via outdoor unit (M-NET cable): L [ 200 m (1.25 mm² or more) Longest transmission cable length (M-NET cable): L [25 m (1.5 mm²) Longest transmission cable length (A-Control cable): L Remote controller cable length: m1 [200 m (0.3 to 1.25 mm²) TB3A...
  • Page 36 F. Example of a system using Branch Box, A-Control indoor unit, and M-NET Control indoor unit. TB3A TB5/TB15 Branch Box A-IC MA-RC (01) (51) TB3B TB5/TB15 M1 M2 S M1 M2 S A-IC MA-RC (02) TB3C TB5/TB15 A-IC MA-RC (01) (03) TB3D A-IC...
  • Page 37 • Name, Symbol, and the Maximum Units for Connection [500 m (1.25 mm² or more) Longest length via outdoor unit (M-NET cable): L [200 m (1.25 mm² or more) Longest transmission cable length (M-NET cable): L and L [25 m (1.5 mm²) Longest transmission cable length (A-Control cable): L Remote controller cable length: m1 [200 m (0.3 to 1.25 mm²) TB3A...

  • Page 38: Troubleshooting

    TROUBLESHOOTING 8-1. CHECKPOINTS FOR TEST RUN 8-1-1. Procedures before test run (1) Before a test run, make sure that the following work is completed. • Installation related : Make sure that the panel of cassette type and electrical wiring are done. Otherwise electrical functions like auto vane will not operate normally.
  • Page 39 8-1-1-2. Test run for wired remote controller <PAR-30MAA><PAR-31MAA> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Test run" with the F1 or F2 button, and press the button.
  • Page 40 8-1-2. Countermeasures for Error During Test Run • If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Determine the nature of the abnormality and apply corrective measures. Detected Unit Check Check...
  • Page 41 8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART Check code 0403 Serial communication error (Ed) Abnormal points and detection methods Causes and checkpoints If serial communication between the outdoor controller board and outdoor Wire breakage or contact failure of connector CN2 or power board is defective. Malfunction of power board communication circuit on outdoor controller board Malfunction of communication circuit on outdoor...
  • Page 42 Check code Compressor temperature trouble 1102 (U2) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints (1) If TH4 falls into following temperature conditions; Malfunction of stop valve Over-heated compressor operation caused by ●exceeds 110 [230°F] continuously for 5 minutes shortage of refrigerant ●exceeds 125 [257°F] Defective thermistor...
  • Page 43 Check code Compressor temperature trouble 1102 (U2) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Disconnect the thermistor wiring to check the resistance.
  • Page 44 Check code High pressure trouble 1302 (UE) Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints (1) High pressure abnormality (63H operation) Defective operation of stop valve (not fully open) If 63H operates(*) during compressor operation. (*4.15 MPa Clogged or broken pipe [602 PSIG]) Malfunction or locked outdoor fan motor...
  • Page 45 Check code High pressure trouble 1302 (UE) Chart 2 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the indoor unit filter clogged? Clean the filter.
  • Page 46 Check code High pressure trouble 1302 (UE) Chart 3 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the TH7. Disconnect the indoor LEV wiring to check the resistance.
  • Page 47 Check code High pressure trouble 1302 (UE) Chart 4 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the SV1. Is the connector for outdoor controller board 63H disconnected or Reconnect the connector or connect it tightly.
  • Page 48 Check code Superheat due to low discharge temperature trouble 1500 (U7) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If the discharge superheat is continuously detected −15 [−27°F](*) or less for Disconnection or loose connection of TH4 Defective holder of TH4 5 minutes even though the indoor LEV has minimum open pulse after the compressor starts operating for 10 minutes.
  • Page 49 Check code Superheat due to low discharge temperature trouble 1500 (U7) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the indoor LEV.
  • Page 50 Check code Refrigerant shortage trouble 1501 (U2) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints (1) When all of the following conditions have been satisfied for 15 Defective operation of stop valve (not fully open) consecutive minutes: Defective thermistor 1.
  • Page 51 Check code Refrigerant shortage trouble 1501 (U2) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the thermistor. Check the 63HS voltage.
  • Page 52 Check code 1501 Closed valve in cooling mode (U2) Abnormal points and detection methods Causes and checkpoints If stop valve is closed during cooling operation. Outdoor liquid/gas valve is closed. Malfunction of outdoor LEV (LEV-A) (blockage) When both of the following temperature conditions have been satisfied for 20 minutes or more during cooling operation.
  • Page 53 Check code Freeze protection of branch box or indoor unit 1503 (P6) Abnormal points and detection methods Causes and checkpoints The purpose of the check code is to prevent indoor unit from freezing or Wrong piping connection between indoor unit and dew condensation which is caused when a refrigerant keeps flowing into branch box the unit in STOP.
  • Page 54 Check code 4-way valve trouble in heating mode 1508 (EF) Abnormal points and detection methods Causes and checkpoints If 4-way valve does not operate during heating operation. 4-way valve failure Disconnection or failure of 4-way valve coil When any of the following temperature conditions is satisfied for 3 minutes Clogged drain pipe or more during heating operation Disconnection or loose connection of connectors...
  • Page 55 Check code Compressor current interruption (Locked compressor) 4100 (UF) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If overcurrent of DC bus or compressor is detected after 30 seconds since Closed stop valve Decrease of power supply voltage the compressor starts operating.
  • Page 56 Check code Compressor current interruption (Locked compressor) 4100 (UF) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Set the model selection switch correctly, Are they set properly? then restart.
  • Page 57 Check code 4210 Compressor overcurrent interruption (UP) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If overcurrent of DC bus or compressor is detected after 30 seconds since Closed outdoor stop valve Decrease of power supply voltage the compressor starts operating.
  • Page 58 Check code 4210 Compressor overcurrent interruption (UP) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Connect the compressor wiring (U, V and W phase) properly, then turn the power Are they connected properly? back ON.
  • Page 59 Check code Undervoltage/Overvoltage/PAM error/L1 open-phase/ 4220 Primary current sensor error/Power synchronization signal error (U9) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If any of following symptoms are detected; Decrease/increase of power supply voltage 2 Primary current sensor failure ●Decrease of DC bus voltage to 400V Disconnection of compressor wiring ●Increase of DC bus voltage to 760V...
  • Page 60 Check code Undervoltage/Overvoltage/PAM error/L1 open-phase/ 4220 Primary current sensor error/Power synchronization signal error (U9) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. The black square (■) indicates a switch position. Diagnosis Remedy Continued from the previous page.
  • Page 61 Check code Heat sink temperature trouble 4230 (U5) Abnormal points and detection methods Causes and checkpoints Blocked outdoor fan If TH8 detects a temperature outside the specified range during compressor operation. Malfunction of outdoor fan motor Blocked airflow path Thermistor <Heat sink> TH8: Rise of ambient temperature Characteristic defect of thermistor...
  • Page 62 Check code Power module trouble 4250 (U6) Abnormal points and detection methods Causes and checkpoints If both of the following conditions have been satisfied: Short-circuit caused by looseness or disconnection of compressor wiring 1. Overcurrent of DC bus or compressor is detected during compressor operation.
  • Page 63 Check code 4400 Fan trouble (Outdoor unit) (U8) Abnormal points and detection methods Causes and checkpoints If no rotational frequency is detected, or detected a value outside the Malfunction of fan motor specified range during fan motor operation. Disconnection of CNF connector Defective outdoor multi controller circuit board ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
  • Page 64 Check code Compressor temperature thermistor (TH4) open/short 5101 (U3) <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints If TH4 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled for 10 minutes after compressor Characteristic defect of thermistor starts, during defrosting operation, or for 10 minutes after returning from Defective outdoor multi controller circuit board...
  • Page 65 Check code Suction pipe temperature thermistor (TH6) open/short 5102 (U4) <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints If TH6 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 seconds to 10 minutes Characteristic defect of thermistor after compressor starts, during defrosting operation, or for 10 minutes after Defective outdoor multi controller circuit board...
  • Page 66 Check code 5105 Outdoor liquid pipe temperature thermistor (TH3) open/short (U4) Abnormal points and detection methods Causes and checkpoints If TH3 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 seconds to 10 minutes Characteristic defect of thermistor after compressor starts, during defrosting operation, or for 10 minutes after Defective outdoor multi controller circuit board...
  • Page 67 Check code Ambient temperature thermistor (TH7) open/short 5106 (U4) Abnormal points and detection methods Causes and checkpoints If TH7 detects to be open/short Disconnection or contact failure of connectors Open: −40 [−40°F] or less Characteristic defect of thermistor Short: 90 [194°F] or more TH7: Thermistor <Ambient>...
  • Page 68 Check code HIC pipe temperature thermistor (TH2) open/short 5109 (U4) Abnormal points and detection methods Causes and checkpoints If TH2 detects to be open/short. Disconnection or contact failure of connectors Open: –40 [–40°F] or less Characteristic defect of thermistor Short: 90 [194°F] or more TH2: Thermistor <HIC pipe>...
  • Page 69 Check code Heat sink temperature thermistor (TH8) open/short 5110 (U4) Abnormal points and detection methods Causes and checkpoints If TH8 detects to be open/short. Disconnection or contact failure of connectors Open: −35.1 [−31.2°F] or less Characteristic defect of thermistor Short: 170.3 [338.5°F] or more Defective outdoor multi controller circuit board TH8: Thermistor <Heat sink>...
  • Page 70 Check code High pressure sensor (63HS) trouble 5201 (F5) Abnormal points and detection methods Causes and checkpoints When the detected pressure in the high pressure sensor is 1 kgf/F [14.2 Defective high pressure sensor PSIG] or less during operation, the compressor stops operation and Decrease of internal pressure caused by gas leakage enters into an anti-restart mode for 3 minutes.
  • Page 71 Check code Low pressure sensor (63LS) trouble 5202 (F3) Abnormal points and detection methods Causes and checkpoints When the detected pressure in the low pressure sensor is −2.3kgf/F [−32.7 Defective low pressure sensor PSIG] or less, or 23.1 kgf/F [328.6 PSIG] or more during operation, the Decrease of internal pressure caused by gas compressor stops operation with a check code <5202>.
  • Page 72 Check code Primary current error 5300 (UH) Abnormal points and detection methods Causes and checkpoints Decrease/trouble of power supply voltage If the detected current sensor input value (primary current) during compressor operation is outside the specified range. Disconnection of compressor wiring Input sensor trouble on outdoor power circuit board ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting...
  • Page 73 Check code 6600 Duplex address error (A0) Abnormal points and detection methods Causes and checkpoints If 2 or more units with the same address are existing. There are 2 units or more with the same address in their controller among outdoor unit, indoor unit, Fresh Master, Lossnay or remote controller Noise interference on indoor/outdoor connectors ●Diagnosis of defects...
  • Page 74 Check code Transmission processor hardware error 6602 (A2) Abnormal points and detection methods Causes and checkpoints If the transmission line shows "1" although the transmission processor A transmitting data collision occurred because of a wiring work or polarity change has performed while transmitted "0".
  • Page 75 Check code Transmission bus BUSY error 6603 (A3) Abnormal points and detection methods Causes and checkpoints An abnormality when no transmission status caused by transmitting The transmission processor is unable to transmit due data collision continues for 8 to 10 minutes. to a short-cycle voltage such as noise is mixed on An abnormality when data cannot be output on the transmission line the transmission line.
  • Page 76 Check code Signal communication error with transmission processor 6606 (A6) Abnormal points and detection methods Causes and checkpoints If the data of unit/transmission processor were not normally transmitted. Accidental disturbance such as noise or lightning If the address transmission from the unit processor was not normally surge Hardware malfunction of transmission processor transmitted.
  • Page 77 Check code No ACK error 6607 (A7) Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints Represents a common error detection The previous address unit does not exist since An abnormality detected by the sending side controller when receiving the address switch was changed while in electric no ACK from the receiving side, though signal was once sent.
  • Page 78 Check code No ACK error 6607 (A7) Chart 2 of 4 Abnormal points and detection methods Causes and checkpoints While the indoor unit is operating with multi The cause of displayed address and attribute is on the Fresh Master side. refrigerant system Fresh Master, an abnormality An abnormality detected by the indoor unit if receiving no ACK when is detected when the indoor unit transmits signal...
  • Page 79 Check code No ACK error 6607 (A7) Chart 3 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Procedure 1: Turn the power OFF of indoor/outdoor unit, Fresh Master, Lossnay and remote controller simultaneously for 2 minutes or more, then turn the power back ON.
  • Page 80 Check code No ACK error 6607 (A7) Chart 4 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Apply the correct kind of transmission line, Is the correct kind of transmission then perform the procedure 1.
  • Page 81 Check code No response frame error 6608 (A8) Abnormal points and detection methods Causes and checkpoints If receiving no response command while already received ACK. Continuous failure of transmission due to noise etc The sending side searches the error in 30 seconds interval for 6 times Decline of transmission voltage/signal caused by continuously.
  • Page 82 Check code 6831(E0/E4) MA communication receive error 6834(E0/E4) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Contact failure of remote controller wirings Detected in remote controller or indoor unit: Irregular Wiring When the main or sub remote controller cannot receive signal from (A wiring length, number of connecting remote indoor unit which has the "0"...
  • Page 83 Check code 6831(E0/E4) MA communication receive error 6834(E0/E4) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page. Refer to the chapter "Electrical Work".
  • Page 84 Check code MA communication send error 6832(E3/E5) 6833(E3/E5) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Detected in remote controller or indoor unit. There are 2 remote controllers set as main. Malfunction of remote controller sending/receiving circuit Malfunction of sending/receiving circuit on indoor controller board...
  • Page 85 Check code MA communication send error 6832(E3/E5) 6833(E3/E5) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page. Refer to the chapter "Electrical Work".
  • Page 86 Check code Total capacity error 7100 (EF) Abnormal points and detection methods Causes and checkpoints When the total of the number on connected indoor unit model names The total of number on connected indoor unit model exceeds the specified capacity level (130% of the number on the outdoor names exceeds the specified capacity level: unit model name), a check code <7100>...
  • Page 87 Check code Capacity code error 7101 (EF) Abnormal points and detection methods Causes and checkpoints When the capacity of connected indoor unit is over, a check code <7101> The model name of connected indoor unit (model code) is displayed. is read as incompatible. The connectable indoor units are: ·P10 to P200 model (code 2 to 40) ·When connecting via branch box: P15 to P100 model...
  • Page 88 Check code Connecting excessive number of units and branch boxes 7102 (EF) Abnormal points and detection methods Causes and checkpoints When the connected indoor units or branch boxes exceed the limit, a Connecting more indoor units and branch boxes than check code <7102>...
  • Page 89 Check code Address setting error 7105 (EF) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints The address setting of connected unit is wrong. There is a unit without correct address setting in the range specified in "7-4. SYSTEM CONTROL". ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
  • Page 90 Check code Address setting error 7105 (EF) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy <M-NET RC (main)> Check whether the M-NET RC (main) address is set in 000, or in the range of 101 to 150.
  • Page 91 Check code Incompatible unit combination error 7130 (EF) Abnormal points and detection methods Causes and checkpoints When the connected indoor unit is not compatible with the outdoor unit, Connecting indoor unit(s) which is not authorized to the outdoor unit detects the error at startup. connect to the outdoor unit.
  • Page 92 8-2. REMOTE CONTROLLER DIAGNOSIS · For M-NET remote controller system If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below. 1 F irst, check that the power-on indicator is lit. I f the correct voltage (12 V DC) is not supplied to the remote controller, the indicator will not light.
  • Page 93 · For MA remote controller system Select "Service" from the Main menu, and press the button. Maintenance password Remote controller check Function setting Select "Remote controller check" with the F1 or F2 button, and press button. Select "Remote controller check" from the Service menu, and press Remote controller check button to start the remote controller check and see the check re- sults.
  • Page 94 8-3. REMOTE CONTROLLER TROUBLE CENTRALLY CONTROLLED 1Hr. ON OFF °C CLOCK CHECK FILTER CHECK MODE °C TEST RUN STAND BY ERROR CODE FUNCTION DEFROST NOT AVAILABLE “ ” Indicator: appears when current is carried. TEMP. ON/OFF FILTER CHECK TEST TIMER SET (M-NET Remote controller) (1) For M-NET remote controller systems Symptom or inspection code...
  • Page 95 8-4. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY) Symptom Display of remote controller CAUSE "Cooling (Heating)" blinks Even the cooling (heating) The indoor unit cannot cool (Heat) if other indoor units are operation selection button heating (Cooling). is pressed, the indoor unit cannot be operated.
  • Page 96 8-5. INTERNAL SWITCH FUNCTION TABLE PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS The black square (■) indicates a switch position. Continue to the next page. OCH675D...
  • Page 97 ■ The black square ( ) indicates a switch position. OCH675D...
  • Page 98 8-6. OUTDOOR UNIT INPUT/OUTPUT CONNECTOR State (CN51) E Lamp power supply A Distant control board B Relay circuit F Procure locally C External output G Max. 10m CN51 adapter (PAC-SA88HA-E) D Outdoor unit control board : Error display lamp : Compressor operation lamp X, Y: Relay (Coil standard of 0.9W or less for 12 V DC) X, Y: Relay (1 mA DC) Auto change over (CN3N)
  • Page 99 8-7. HOW TO CHECK THE PARTS PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS Checkpoints Parts name Disconnect the connector then measure the resistance with a tester. Thermistor (TH2) <HIC Pipe> (At the ambient temperature 10 to 30°C) Thermistor (TH3) Normal Abnormal <Outdoor liquid pipe>...
  • Page 100 Check method of DC fan motor (fan motor/outdoor multi controller circuit board) 1 Notes · High voltage is applied to the connector (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor multi controller circuit board and fan motor.) 2 Self check Symptom: The outdoor fan cannot rotate.
  • Page 101 8-8. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <HIC pipe> (TH2) • Thermistor <Outdoor liquid pipe> (TH3) • Thermistor <Suction pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 kΩ ± 3 % B constant = 3480 ±...
  • Page 102 <HIGH PRESSURE SENSOR> • Comparing the High Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the high pressure sensor appears on the LED1 on the control board. The figure at left shows that the switches 1 through 4 are set to ON and 5 through 8 are set to OFF.
  • Page 103 <LOW PRESSURE SENSOR> • Comparing the Low Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the low pressure sensor appears on the LED1 on the control board. The figure at left shows that the switches 1 through 4 are set to ON and 5 through 8 are set to OFF.
  • Page 104 8-9. TEST POINT DIAGRAM Outdoor multi controller circuit board PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS <CAUTION> TEST POINT 1 is high voltage. CN51 External signal Pump down Model selection Test run Manual defrost Model selection output CN102 Connect to the M-NET P.B...
  • Page 105 Outdoor power circuit board Brief Check of POWER MODULE PUMY-P200YKM2 If they are short-circuited, it means that they are broken. PUMY-P200YKM2R1 Measure the resistance in the following points (connectors, etc.). PUMY-P200YKM2-BS 1. Check of DIODE MODULE PUMY-P200YKM2R1-BS L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.
  • Page 106 M-NET power circuit board PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS Connect to the outdoor multi controller circuit board (CN102) 1–2: 24–30 V DC 3–4: 24–30 V DC Connect to the electrical parts box Connect to the outdoor noise filter circuit board (CNAC1) 1–3: 220–240 V AC...
  • Page 107 Outdoor noise filter circuit board PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS CNCT Primary current Connect to the outdoor power circuit board (CN5) Connect to the elec- trical parts box LO1, LO2, LO3 POWER LO3 POWER Connect to the elec- SUPPLY trical parts box...
  • Page 108 SW:setting 0..OFF 8-10. OUTDOOR UNIT FUNCTIONS 1..ON OCH675D...
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  • Page 115: Electrical Wiring

    · Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a malfunction of unit or fire. · Be sure to install N-Line. Without N-Line, it could cause damage to the unit. 9-2. WIRING OF MAIN POWER SUPPLY AND EQUIPMENT CAPACITY PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS ■...
  • Page 116 <When power is supplied separately> ～ /N 220-230-240 V, 50 Hz 3N ～380-400-415 V, 50Hz L1/L2/L3/N ～ /N 220 V, 60 Hz Grounded S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 Grounded A Switch (Breakers for Wiring and Current Leakage) B Outdoor Unit C Branch Box D A-Control Indoor Unit E CITY MULTI series Indoor unit...
  • Page 117 Cross section area of Wire for Main Power and ON/OFF capacities 9-2-1. PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS <Outdoor unit> <When power is supplied to outdoor unit and branch box separately> Minimum Wire Cross-section- Breaker al area (mm Power Supply Breaker for Current Leakage...
  • Page 118 9-3. DESIGN FOR CONTROL WIRING Please note that the types and numbers of control wires needed by CITY MULTI series will depend on the remote con- trollers and whether they are linked with the system. 9-3-1. Selection number of control wires M-NET remote controller Remote controller used in system control operations.
  • Page 119 9-5. SYSTEM SWITCH SETTING In order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of CITY MULTI series, each microprocessor must be assigned an identification number (address). The addresses of outdoor units, indoor units, and remote controller must be set using their settings switches.
  • Page 120 9-7. METHOD FOR OBTAINING ELECTRICAL CHARACTERISTICS WHEN A CAPACITY AGREEMENT IS TO BE SIGNED WITH AN ELECTRIC POWER COMPANY The electrical characteristics of connected indoor unit system for air conditioning systems, including CITY MULTI series, will depend on the arrangement of the indoor and outdoor units. First read the data on the selected indoor and outdoor units and then use the following formulas to calculate the electrical characteristics before applying for a capacity agreement with the local electric power company.

  • Page 121: Refrigerant Piping Tasks

    REFRIGERANT PIPING TASKS 10-1. REFRIGERANT PIPING SYSTEM Line-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit A+B+C+a+b+c+d [ 150 m Permissible Total Piping Length Length A+B+C+d [ 80 m Farthest Piping Length B+C+d [ 30 m Farthest Piping Length After First Branch High/Low Difference in...
  • Page 122 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit A+a+b+c+d [ 150 m Permissible Total Piping Length Length A+d [ 80 m Farthest Piping Length Farthest Piping Length d is 30 meters or less After First Branch High/Low Difference in 50 meters or less (If the outdoor unit is lower, 40 meters or less)
  • Page 123 Note: Pipe re-branching after the header branching is not possible. Method of Combined Branching of Lines and Headers Outdoor unit Connection Examples First branching (branching joint) (Connecting to 5 Indoor Units) Branching joint Indoor unit Branching header Blind caps Permissible Total Piping Length A+B+C+a+b+c+d+e is 150 meters or less Length...
  • Page 124 AOutdoor unit BBranching joint CBranch box Branch box Method DIndoor unit Connection Examples (Connecting to 8 Indoor Units) A + B + C + a + b + c + d + e + f + g + h [ 150 m Total piping length A + C + h [ 80 m Farthest piping length (L)
  • Page 125 A Outdoor Unit B First joint C Branch header D Branch box E CITY MULTI Indoor unit F M, S, P series Indoor unit Mixed Method Connection Examples (Connecting to 1 Branch box) A+B+C+D+E+a+b+c+d+e+f+g+h+i+j [ 150 m Total piping length A+E+a or A+B+C+e [ 80 m Farthest piping length (L1) A+B+C+D+j [ 80 m...
  • Page 126 A Outdoor Unit B First joint C Branch header D Branch box E CITY MULTI Indoor unit F M, S, P series Indoor unit Mixed Method Connection Examples (Connecting to 2 Branch boxes) A+B+C+D+E+a+b+c+d+e+f+g+h+i+j+k [ 150 m Total piping length A+E+a [ 80 m Farthest piping length (L1) A+B+C+k [ 80 m...
  • Page 127 10-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 10-2-1. Introduction R410A refrigerant of this air conditioner is non-toxic and non-flam- mable but leaking of large amount from an indoor unit into the room Outdoor unit where the unit is installed may be deleterious. Direction To prevent possible injury, the rooms should be large enough to of refrigerant flow...

  • Page 128: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUMY-P200YKM2 PUMY-P200YKM2-BS PUMY-P200YKM2R1 PUMY-P200YKM2R1-BS Note: Turn OFF the power supply before disassembly. : Indicates the visible parts in the photos/fi gures. OPERATING PROCEDURE PHOTOS/FIGURES Top panel fi xing screws Top panel fi xing screws Top panel fi xing screws...
  • Page 129 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES (6) Remove 2 electrical parts box fixing screws (4 × 10) and Photo 5 detach the electrical parts box by pulling it upward. Electrical parts box The electrical parts box is fixed with 2 hooks on the left Hook and 1 hook on the right.
  • Page 130 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistors Photo 9-1 Thermistor <HIC> (TH2) and thermistor <Compressor> (TH4) (1) Remove the service panel. (See Photo 1) (2) Disconnect the connectors, TH2 (black) and TH4 (white), Thermistor on the Multi controller board in the electrical parts box. <Compressor>...
  • Page 131 OPERATING PROCEDURE PHOTOS/FIGURES 9. Removing bypass valve coil (SV1) and bypass valve Photo 11 Low pressure Bypass valve (1) Remove the service panel. (See Photo 1) Bypass valve sensor coil (SV1) coil (SV1) coil fi xing screw coil fi xing screw (63LS) (2) Remove the top panel.
  • Page 132 OPERATING PROCEDURE PHOTOS/FIGURES 14. Removing the compressor (MC) Photo 14 (1) Remove the service panel. (See Photo 1) Valve Valve bed bed fi xing (2) Remove the top panel. (See Photo 1) screws screws (3) Remove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel.
  • Page 133 OCH675D...
  • Page 134 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Issued:Jun. 2019 No. OCH675 REVISED EDITION-D Issued:Nov. 2018 No. OCH675 REVISED EDITION-C Issued:May 2018 No. OCH675 REVISED EDITION-B Issued:Jan.2018 No. OCH675 REVISED EDITION-A Published: Nov. 2017 No. OCH675 Specifications are subject to change without notice.

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