Mitsubishi Electric CITY MULTI PUMY-P200YKM2R2 Technical & Service Manual
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Mitsubishi Electric CITY MULTI PUMY-P200YKM2R2 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
PUMY-P200YKM2R2
PUMY-P200YKM2-ETR2
PUMY-P200YKM2-ERR2
PUMY-P200YKM2-BS
Salt proof model
PUMY-P200YKM2R1-BS
PUMY-P200YKM2-BS
PUMY-P200YKM2-BSR2
PUMY-P200YKM2-ETBSR2
PUMY-P200YKM2-ERBSR2
CONTENTS
TECHNICAL CHANGES ......................................... 2
1. SAFETY PRECAUTION ..................................... 3
2. OVERVIEW OF UNITS ....................................... 6
3. SPECIFICATIONS ............................................ 10
4. DATA ................................................................. 11
5. OUTLINES AND DIMENSIONS ....................... 19
6. WIRING DIAGRAM ........................................... 21
8. TROUBLESHOOTING ...................................... 41
9. ELECTRICAL WIRING ................................... 117
10. REFRIGERANT PIPING TASKS .................... 123
11. DISASSEMBLY PROCEDURE ....................... 130
Model name
indication
OUTDOOR UNIT
REVISED EDITION-E
Revision:
• PUMY-P200YKM2R2,
PUMY-P200YKM2-ETR2,
PUMY-P200YKM2-ERR2,
PUMY-P200YKM2-BSR2,
PUMY-P200YKM2-ETBSR2 and
PUMY-P200YKM2-ERBSR2
have neen added in REVISED
EDITION-E.
• Some descriptions have been
modified.
OCH675 REVISED EDITION-D
is void.
Note:
• This service manual describes
technical data of the outdoor
units only.
PARTS CATALOG (OCB675)
HFC
utilized
R410A
June 2020
No. OCH675

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Summary of Contents for Mitsubishi Electric CITY MULTI PUMY-P200YKM2R2

  • Page 1: Table Of Contents

    utilized R410A SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS June 2020 No. OCH675 REVISED EDITION-E TECHNICAL & SERVICE MANUAL <Outdoor unit> Revision: [Model Name] [Service Ref.] • PUMY-P200YKM2R2, PUMY-P200YKM2-ETR2, PUMY-P200YKM2 PUMY-P200YKM2 PUMY-P200YKM2-ERR2, PUMY-P200YKM2-BSR2, PUMY-P200YKM2R1 PUMY-P200YKM2-ETBSR2 and PUMY-P200YKM2-ERBSR2 PUMY-P200YKM2R2 have neen added in REVISED EDITION-E.

  • Page 2: Technical Changes

    TECHNICAL CHANGES PUMY-P200YKM2R1 PUMY-P200YKM2R2 PUMY-P200YKM2R1-BS PUMY-P200YKM-BSR2 • Some connectable indoor units have been added. PUMY-P200YKM2 PUMY-P200YKM2R1 PUMY-P200YKM2-BS PUMY-P200YKM2R1-BS • Some connectable indoor units have been added. OCH675E...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 1-1. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Precautions during the repair service Preparation before the repair service • Do not perform the work involving the electric parts • Prepare the proper tools. with wet hands. •...
  • Page 4 [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 5 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 6: Overview Of Units

    OVERVIEW OF UNITS 2-1. SYSTEM CONSTRUCTION Outdoor unit PUMY-P200YKM2 PUMY-P200YKM2-BS Capacity Type 10 to Type 200 Applicable Number of units 1 to 12 unit indoor unit Total system capacity range 50 to 130% of outdoor unit capacity CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E Branching pipe Branch header Branch header...
  • Page 7 2-2. SYSTEM CONSTRUCTION (BRANCH BOX SYSTEM) Outdoor unit PUMY-P200YKM2 PUMY-P200YKM2-BS Capacity kW unit: Type 15 to Type 100 Applicable indoor unit Number of units 2 to 8 units Total system capacity range 50 to 130 % of outdoor unit capacity (11.2 to 29.1 kW) Branch box that can be Number of units 1 to 2 units*...
  • Page 8 2-3. SYSTEM CONSTRUCTION (MIXED SYSTEM) Outdoor unit PUMY-P200YKM2 PUMY-P200YKM2-BS CITY MULTI indoor unit Type 10 to Type 200 Capacity Via branch box kW unit: Type 15 to Type 100 Applicable Via branch box CITY MULTI indoor indoor unit Number of units 1-branch box 2-branch box 11.2 to 29.1 kW...
  • Page 9 2-4. SYSTEM SPECIFICATIONS (1) Outdoor Unit PUMY-P200YKM2 Service Ref. PUMY-P200YKM2-BS Cooling (kW) 22.4 Capacity Heating (kW) 25.0 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.

  • Page 10: Specifications

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

  • Page 11: Data

    DATA 4-1. SELECTION OF COOLING/HEATING UNITS <Cooling> Design Condition Outdoor Design Dry Bulb Temperature 38ºC 19.4 kW Total Cooling Load Room1 Indoor Design Dry Bulb Temperature 27ºC Indoor Design Wet Bulb Temperature 20ºC Cooling Load 9.1 kW Room2 Indoor Design Dry Bulb Temperature 24ºC Indoor Design Wet Bulb Temperature 18ºC...
  • Page 12 <Heating> Design Condition Outdoor Design Wet Bulb Temperature 2ºC Total Heating Load 20.4 kW Room1 Indoor Design Dry Bulb Temperature 21ºC 9.5 kW Heating Load Room2 23ºC Indoor Design Dry Bulb Temperature Heating Load 10.9 kW <Other> Indoor/Outdoor Equivalent Piping Length 40 m Capacity of indoor unit Unit: kW...
  • Page 13 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 14 <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 -20.0 -15.0 -10.0 -5.0 10.0 15.0...
  • Page 15 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> 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...
  • Page 16 4-3-2. PUMY-P200YKM2 PUMY-P200YKM2-BS <Heating> 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 10.0 380V...
  • Page 17 4-4. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING 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 18 4-5. NOISE CRITERION CURVES PUMY-P200YKM2 PUMY-P200YKM2-BS SPL(dB) MODE LINE COOLING HEATING COOLING SILENT MODE 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 19: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUMY-P200YKM2 PUMY-P200YKM2R1 PUMY-P200YKM2-BS PUMY-P200YKM2R1-BS Unit: mm OCH675E...
  • Page 20 PUMY-P200YKM2R2 PUMY-P200YKM2-ETR2 PUMY-P200YKM2-ETBSR2 PUMY-P200YKM2-BSR2 PUMY-P200YKM2-ETBSR2 PUMY-P200YKM2-ERBSR2 Unit: mm OCH675E...

  • Page 21: Wiring Diagram

    WIRING DIAGRAM PUMY-P200YKM2 PUMY-P200YKM2R1 PUMY-P200YKM2-BS PUMY-P200YKM2R1-BS OCH675E...
  • Page 22 PUMY-P200YKM2R2 PUMY-P200YKM2-ETR2 PUMY-P200YKM2-ERR2 PUMY-P200YKM2-BSR2 PUMY-P200YKM2-ETBSR2 PUMY-P200YKM2-ERBSR2 OCH675E...

  • Page 23: Necessary Conditions For System Construction

    NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 7-1. TRANSMISSION SYSTEM SETUP OCH675E...
  • Page 24 7-2. Special Function Operation and Settings for M-NET Remote Controller (M-NET remote controller cannot be connected with a refrigerant system which includes branch box.) It is necessary to perform “group settings” and “Interlocked LOSSNAY” at making group settings of different refrigerant systems (multiple outdoor unit).
  • Page 25 (a) Group setting Use this screen to register the indoor units and the AHC to be controlled from the controller. 1. Select an indoor unit or an AHC address in the [Address] field. [Group setting] The number of units that can be registered. Indoor unit: 16 units maximum Address AHC: 1 unit maximum...
  • Page 26 7-3. REFRIGERANT SYSTEM DIAGRAM 7-3-1. Connection without Branch box Thermistor(TH7) <Ambient> Check valve <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 Valve(SV1) Thermistor(TH3) Thermistor(TH6) Strainer Capillary <Suction pipe>...
  • Page 27 7-3-2. Connection with Branch box Selecting size ■ When using 1-branch box L [ 20 m ø9.52 Liquid The piping connection size dif- Flare connection employed. (No brazing) (mm) L > 20 m ø12.7 fers according to the type and capacity of indoor units.
  • Page 28 7-3-3. Mixed system (CITY MULTI indoor units and M, S, P series indoor units (Via Branch box) Pipe size System pipe size Liquid pipe Gas pipe A Outdoor Unit L1 [ 60 m and L2 [ 20 m ø9.52 mm ø19.05 mm B First joint C Branch header...
  • Page 29 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 constraint 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 1.
  • Page 30 • Name, Symbol and the Maximum Remote controller Units for Connection Name Symbol Maximum units for connection 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 31 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 32 • Name, Symbol, and the Maximum Units for Connection • Longest length via outdoor units: L [ 500 m (1.25 mm²) • Longest transmission cable length: L [ 200 m (1.25 mm²) • Remote controller cable length: R [ 10 m (0.5 to 1.25 mm²) If the length exceeds 10 m, use a 1.25 mm²...
  • Page 33 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 1.
  • Page 34 Permissible Lengths Constraint items Longest transmission cable length: The MA remote controller and the M-NET remote controller cannot be used together [ 200 m (1.25 mm²) with the indoor unit of the same group. MA remote controller cable length: [ 200 m (0.3 to 1.25 mm²) (00) M-IC M-IC...
  • Page 35 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 36 • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L and L [ 500 m (1.25 mm² more) Longest transmission cable length (M-NET cable): L and L and L and L [ 200 m (1.25 mm² or more) Remote controller cable length: m1 and m1+m2+m3 and m1+m2+m3+m4 [ 200 m (0.3 to 1.25 mm²) (51) M-IC...
  • Page 37 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 38 • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L [500 m (1.25 mm² or more) Longest transmission cable length (M-NET cable): L [ 200 m (1.25 mm² or more) Longest transmission cable length (A-Control cable): L [25 m (1.5 mm²) Remote controller cable length: m1 [200 m (0.3 to 1.25 mm²) TB3A...
  • Page 39 F. Example of a system using Branch Box, A-Control indoor unit, and M-NET Control indoor unit. Branch Box TB3A TB5/TB15 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 40 • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L [500 m (1.25 mm² or more) Longest transmission cable length (M-NET cable): L and L [200 m (1.25 mm² or more) Longest transmission cable length (A-Control cable): L [25 m (1.5 mm²) Remote controller cable length: m1 [200 m (0.3 to 1.25 mm²) TB3A...

  • Page 41: 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 42 8-1-1-2. Test run for MA remote controller <PAR-4xMAA (˝x˝ represents 0 or later)> MENU RETURN SELECT ON/OFF Function buttons Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Select ˝Test run˝ with the F1 or F2 button, and press the [ ] button.
  • Page 43 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 44 8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART Check code Serial communication error 0403 (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 45 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 46 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 47 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 48 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 49 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 50 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 multi controller circuit board 63H Reconnect the connector or connect it tightly.
  • Page 51 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 5 minutes even though the indoor LEV has minimum open pulse after the Defective holder of TH4 compressor starts operating for 10 minutes.
  • Page 52 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 53 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 54 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 55 Check code Closed valve in cooling mode 1501 (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 56 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 57 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 58 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 the compressor starts operating. Decrease of power supply voltage Looseness, disconnection or converse of compressor wiring connection...
  • Page 59 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 60 Check code Compressor overcurrent interruption 4210 (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 the compressor starts operating. Decrease of power supply voltage Looseness, disconnection or reverse phase of compressor wiring connection...
  • Page 61 Check code Compressor overcurrent interruption 4210 (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 62 Check code Voltage shortage /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 L1 open-phase (Y model only) ●Decrease of DC bus voltage to 200 V(\/model), 350 V (Y model) Primary current sensor failure...
  • Page 63 Check code Voltage shortage /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 64 Check code Heat sink temperature trouble 4230 (U5) Abnormal points and detection methods Causes and checkpoints If TH8 detects a temperature outside the specified range during Blocked outdoor fan compressor operation. Malfunction of outdoor fan motor Blocked airflow path Thermistor <Heat sink> TH8: Rise of ambient temperature Characteristic defect of thermistor...
  • Page 65 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 66 Check code Fan trouble (Outdoor unit) 4400 (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 67 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 68 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 69 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 70 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 71 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 72 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 73 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 enters into an anti-restart mode for 3 minutes.
  • Page 74 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 check code <5202>.
  • Page 75 Check code Current sensor trouble 5300 (UH) Abnormal points and detection methods Causes and checkpoints If the detected current sensor input value (primary current) during Decrease/trouble of power supply voltage 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 76 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 77 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 transmitted "0". wiring work or polarity change has performed while the power is ON on either of the indoor/outdoor unit, Fresh Master or Lossnay Malfunction of transmitting circuit on transmission...
  • Page 78 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 79 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 surge If the address transmission from the unit processor was not normally Hardware malfunction of transmission processor transmitted.
  • Page 80 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 81 Check code No ACK error 6607 (A7) Chart 2 of 4 Abnormal points and detection methods Causes and checkpoints The cause of displayed address and attribute is on the Fresh Master While the indoor unit is operating with multi 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 82 Check code No ACK error 6607 (A7) Chart 3 of 4 Note: ●Diagnosis of defects When the address of the outdoor unit is displayed as abnormal, the Make sure to turn the power OFF before connecting/disconnecting outdoor circuit board may be faulty. If the unit is not restored after any connectors, or replacing boards.
  • Page 83 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 84 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 85 Check code MA communication receive error 6831(E0/E4) 6834(E0/E4) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Detected in remote controller or indoor unit: Contact failure of remote controller wirings 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 86 Check code MA communication receive error 6831(E0/E4) 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 87 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 88 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 89 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), check code <7100>...
  • Page 90 Check code Capacity code error 7101 (EF) Abnormal points and detection methods Causes and checkpoints When the capacity of connected indoor unit is over, check code <7101> is The model name of connected indoor unit (model code) 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 91 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, check Connecting more indoor units and branch boxes than code <7102>...
  • Page 92 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 93 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 94 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 95 8-2. REMOTE CONTROLLER DIAGNOSIS · For MA remote controller system If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press the [ ] button. Diagnosis Self check Remote controller check Select "Check"...
  • Page 96 8-3. REMOTE CONTROLLER TROUBLE (1) For M-NET remote controller systems Symptom or inspection code Cause Inspection method and solution Though the content of operation is • The power supply of the indoor unit is not on. • Check the part where the displayed on the remote •...
  • Page 97 8-4. THE FOLLOWING SYMPTOMS DO NOT REPRESENT TROUBLE (EMERGENCY) Symptom Display of remote controller CAUSE Even the cooling (heating) "Cooling (Heating)" blinks The indoor unit cannot cool (heat) if other indoor units are heating (cooling). operation selection button is pressed, the indoor unit cannot be operated.
  • Page 98 8-5. INTERNAL SWITCH FUNCTION TABLE The black square (■) indicates a switch position. Continue to the next page. OCH675E...
  • Page 99 ■ The black square ( ) indicates a switch position. OCH675E...
  • Page 100 8-6. OUTDOOR UNIT INPUT/OUTPUT CONNECTOR State (CN51) A Distant control board E Lamp power supply 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 rating: ≤...
  • Page 101 8-7. HOW TO CHECK THE PARTS Parts name Checkpoints Thermistor (TH2) Disconnect the connector then measure the resistance with a multimeter. <HIC Pipe> (At the ambient temperature 10 to 30°C) Thermistor (TH3) Normal Abnormal <Outdoor liquid pipe> 160 to 410 kΩ Thermistor (TH4) <Compressor>...
  • Page 102 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 103 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 104 <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 105 <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 106 8-9. TEST POINT DIAGRAM Outdoor multi controller circuit board <CAUTION> TEST POINT 1 is high voltage. CN51 External signal Model selection Pump down Test run Manual defrost Model selection output CN102 Connect to the M-NET P.B (M-NET power circuit board) Function selection CN40,CN41 Centralized control power...
  • Page 107 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). 1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.
  • Page 108 M-NET power circuit board 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 OCH675E...
  • Page 109 Outdoor noise filter circuit board CNCT Primary current Connect to the outdoor power circuit board (CN5) Connect to the elec- trical parts box LO1, LO2, LO3 POWER Connect to the elec- SUPPLY trical parts box LO1-LO2/LO2- LO3/LO3-LO1: 400V AC input CNAC2 Connect to the out- 230 V AC...
  • Page 110 SW:setting 8-10. OUTDOOR UNIT FUNCTIONS 0..OFF 1..ON OCH675E...
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  • Page 117: Electrical Wiring

    ELECTRICAL WIRING This chapter provides an introduction to electrical wiring for CITY MULTI series, together with notes concerning power wiring, wiring for control (transmission wires and remote controller wires), and the frequency converter. 9-1. OVERVIEW OF POWER WIRING (1) Use a separate power supply for the outdoor unit and indoor unit. (2) Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
  • Page 118 <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 S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 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 F Pull Box...
  • Page 119 Cross section area of Wire for Main Power and ON/OFF capacities 9-2-1. <Outdoor unit> When power is supplied to outdoor unit and branch box separately Minimum Wire Cross-section- al area (mm Breaker Power Supply Breaker for Current Leakage for Wiring * Main Ground Model...
  • Page 120 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 121 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 122 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 123: 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 Permissible Total Piping Length A+B+C+a+b+c+d [ 150 m Length Farthest Piping Length A+B+C+d [ 80 m Farthest Piping Length B+C+d [ 30 m After First Branch Permissible...
  • Page 124 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit Permissible Total Piping Length A+a+b+c+d [ 150 m Length Farthest Piping Length A+d [ 80 m Farthest Piping Length d is 30 meters or less After First Branch Permissible High/Low Difference in...
  • Page 125 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 126 AOutdoor unit BBranching joint CBranch box Branch box Method DIndoor unit Connection Examples (Connecting to 8 Indoor Units) Total piping length A + B + C + a + b + c + d + e + f + g + h [ 150 m Farthest piping length (L) A + C + h [ 80 m Permissible...
  • Page 127 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) Total piping length A+B+C+D+E+a+b+c+d+e+f+g+h+i+j [ 150 m Farthest piping length (L1) A+E+a or A+B+C+e [ 80 m Farthest piping length.
  • Page 128 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) Total piping length A+B+C+D+E+a+b+c+d+e+f+g+h+i+j+k [ 150 m Farthest piping length (L1) A+E+a [ 80 m Farthest piping length.
  • Page 129 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 130: Disassembly Procedure

    DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. Note: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and top panel Top panel fixing screws Photo 1 Top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service panel.
  • Page 131 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 132 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 133 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 fixing screw (63LS) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box.
  • Page 134 Note: Recover refrigerant without spreading it in the air. screws HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Issued:Jun. 2020 No. OCH675 REVISED EDITION-E Issued:Jun. 2019 No. OCH675 REVISED EDITION-D Issued:Nov. 2018 No. OCH675 REVISED EDITION-C Issued:May 2018 No.
  • Page 135 Related Links Model Number: PUMY-P200YKM2 City Multi VRF Brochure PUMY-P112-200VKM4/YKM4/2 Product Information Sheet PUMY-P200YKM2 Declaration of Conformity (CE2017A14) PUMY-P200YKM2 Installation Manual (BH79D827H02) PUMY-P200YKM2 Service Manual (OCH675E) S-Series DATABOOK (M-P0843)

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