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Mitsubishi Electric CITY MULTI PUMY-P200YKM3 Service Manual

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Table of Contents

SERVICE MANUAL
<Outdoor unit>
Model name
PUMY-P200YKM3
PUMY-P200YKM3-ER
PUMY-P200YKM3-ET
Salt proof model
PUMY-P200YKM3-BS
PUMY-P200YKM3-ERBS
PUMY-P200YKM3-ETBS
Model name
indication
1. SERVICE REF. ··································· 2
2. SAFETY PRECAUTION ······················· 3
3. OVERVIEW OF UNITS ························ 7
4. SPECIFICATIONS ···························· 11
5. DATA ·············································· 12
6. OUTLINES AND DIMENSIONS ··········· 20
7. WIRING DIAGRAM ··························· 21
8. TROUBLESHOOTING ······················· 22
9. DISASSEMBLY PROCEDURE ············ 97
10. SYSTEM CONSTRUCTION ···············104
11. ELECTRICAL WIRING ·····················106
12. REFRIGERANT PIPING TASKS ·········107
13. REMOTE CONTROLLER ··················108
Appendix: Installation manual (Exerpt of English Ver.)
PARTS CATALOG (OCB791)
HFC
utilized
R410A
June 2022
OCH791

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Summary of Contents for Mitsubishi Electric CITY MULTI PUMY-P200YKM3

  • Page 1: Table Of Contents

    utilized R410A June 2022 OCH791 SERVICE MANUAL <Outdoor unit> Model name PUMY-P200YKM3 PUMY-P200YKM3-ER PUMY-P200YKM3-ET Salt proof model PUMY-P200YKM3-BS PUMY-P200YKM3-ERBS PUMY-P200YKM3-ETBS 1. SERVICE REF. ··································· 2 2. SAFETY PRECAUTION ······················· 3 3. OVERVIEW OF UNITS ························ 7 4. SPECIFICATIONS ···························· 11 5.

  • Page 2: Service Ref

    SERVICE REF. PUMY-P200YKM3 PUMY-P200YKM3-ER PUMY-P200YKM3-ET PUMY-P200YKM3-BS PUMY-P200YKM3-ERBS PUMY-P200YKM3-ETBS OCH791 _2...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. Cautions related to new refrigerant ■ Cautions for units utilizing refrigerant R410A Preparation before the repair service • Prepare the proper tools. • Prepare the proper protectors. • Provide adequate ventilation. • After stopping the operation of the air conditioner, turn off the power-supply breaker. •...
  • Page 4 Handle tools with care. • If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor. Do not use a charging cylinder. • If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered. Ventilate the room if refrigerant leaks during operation.
  • Page 5 Tool name Specifications Refrigerant charge base – Refrigerant cylinder Only for R410A Top of cylinder (Pink) Cylinder with syphon Refrigerant recovery equipment – 2-2. Precautions for salt-proof type “-BS” model Although “-BS” model has been designed to be resistant to salt damage, observe the following precautions to maintain the performance of the unit.
  • Page 6 Dimension B ( ) (mm) -0.4 Nominal dimensions (in) Outside diameter (mm) R410A 15.88 29.0 27.0 19.05 – 36.0 ■ Tools for R410A (The following table shows whether conventional tools can be used or not.) Tools and materials R410A tools Can R22 tools be used ? Can R407C tools be used ? Gauge manifold...

  • Page 7: Overview Of Units

    OVERVIEW OF UNITS 3-1. System construction Outdoor unit Horsepower 8 HP Model name P200 Applicable indoor unit Capacity class 10 to 200 Number of units 1 to 12 Total system capacity range 50 to 130% of outdoor unit capacity Model name CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E...
  • Page 8 3-2. System construction (Branch box system) Outdoor unit Horsepower 8 HP Model name P200 Applicable indoor unit Capacity class 15 to 100 Number of units 2 to 8 Total system 50 to 130% of outdoor unit capacity capacity range 11.2 to 29.1 kW Branch box that can be connected Number of units 1 to 2*...
  • Page 9 3-3. System construction (Mixed system) Outdoor unit Model name P200 Applicable Capacity class CITY MULTI indoor unit 10 to 200 indoor unit Via branch box 15 to 100 Number of units Via branch box CITY MULTI indoor 1 branch box 2 branch boxes Total system capacity range 11.2 to 29.1 kW...
  • Page 10 3-4-3. Operating temperature range Cooling Heating Indoor intake air temperature W.B. 15 to 24°C D.B. 15 to 27°C Outdoor intake air temperature D.B. −5 to 52°C W.B. −20 to 15°C D.B.: Dry Bulb Temperature W.B.: Wet Bulb Temperature *1. 10 to 52°C D.B.: When connecting PKFY-P10/15/20/25/32VLM, PFFY-P20/25/32VKM, PFFY-P20/25/32VCM, PFFY-P20/25/32VLEM, PFFY-P20/25/32VLRM(M), and M series, S series, and P series type indoor unit.

  • Page 11: Specifications

    SPECIFICATIONS Model PUMY-P200YKM3(-BS) PUMY-P200YKM3-ER(BS) PUMY-P200YKM3-ET(BS) Power source 3-phase 380-400-415 V, 50Hz Cooling capacity (Nominal) 22.4 kcal/h 19,300 Btu/h 76,400 Power input 7.18 Current input 11.73 - 11.15 - 10.75, 11.73 - 11.15 kW/kW 3.12 Temp. range of Indoor W.B. 15 to 24°C / 59 to 75°F cooling Outdoor D.B.

  • Page 12: Data

    DATA 5-1. Selection of indoor and outdoor units 5-1-1. Cooling Design condition Outdoor dry bulb temperature 38ºC Total cooling load 19.4 kW Room 1 Indoor dry bulb temperature 27ºC Indoor wet bulb temperature 20ºC Cooling load 9.1 kW Room 2 Indoor dry bulb temperature 24ºC Indoor wet bulb temperature...
  • Page 13 5-1-2. Heating Design condition Outdoor wet bulb temperature 2°C Total heating load 20.4 kW Room 1 Indoor dry bulb temperature 21°C Heating load 9.5 kW Room 2 Indoor dry bulb temperature 23°C Heating load 10.9 kW Other Indoor/Outdoor piping equivalent length 40 m Capacity of indoor unit P·FY series Model class of indoor unit...
  • Page 14 5-2. Correction by temperature The outdoor units have varied capacity at different designing temperature. With the nominal cooling/heating capacity value and the ratio below, the capacity can be observed at various temperature. 5-2-1. Cooling Indoor temperature [°C WB] <Figure 1> Indoor unit temperature correction Indoor Temperature 19°C WB -5.0...
  • Page 15 20°C DB -20.0 -15.0 -10.0 -5.0 10.0 15.0 Outdoor temperature [°C WB] Indoor Temperature 20°C DB 15°C DB 25°C DB -20.0 -15.0 -10.0 -5.0 10.0 15.0 Outdoor temperature [°C WB] <Figure 4> Outdoor unit temperature correction 5-3. Standard operation data (Reference data) PUMY-P200YKM3(-BS) Operation PUMY-P200YKM3-ER(BS)
  • Page 16 5-4. 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 indoor and outdoor units". ■ Cooling 25.0 20.0 15.0 10.0 10.0 12.0 14.0...
  • Page 17 ■ Heating 30.0 25.0 20.0 15.0 10.0 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) 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 400V...
  • Page 18 5-5. Correcting capacity for changes in the length of refrigerant piping During cooling, obtain the ratio (and the piping equivalent 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 5 to 7. Then multiply by the cooling capacity from Figure 1 and 2 in “4-2.
  • Page 19 Correction factor diagram Outdoor Intake temperature (°C WB) Correction factor 1.00 0.98 0.89 0.88 0.89 0.90 0.95 0.95 0.95 0.95 0.95 5-6. Noise criterion curves SPL(dB) MODE LINE COOLING HEATING COOLING SILENT MODE NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS...

  • Page 20: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm OCH791 _20...

  • Page 21: Wiring Diagram

    WIRING DIAGRAM OCH791 _21...

  • Page 22: 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 is installed and electrical wiring is done. Otherwise electrical functions like auto vane will not operate normally.
  • Page 23 8-1-3. 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. Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
  • Page 24 0403 (Ed): Serial communication error / Model selection SW error Abnormal points and detection methods Causes and checkpoints Serial communication between the outdoor multi controller • Wire breakage or contact failure of connector CN2 or circuit board and outdoor power circuit board is defective. •...
  • Page 25 1102 (U2): Compressor temperature trouble Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints • TH4 falls into either of the following temperature condi- • Malfunction of stop valve tions: • Over-heated compressor operation caused by shortage - over 110°C [230°F] continuously for 5 minutes of refrigerant - over 125°C [257°F]...
  • Page 26 1102 (U2): Compressor temperature trouble Chart 2 of 2 Diagnosis of failure Continued from the previous page. Disconnect the thermistor wiring to check the resistance. Is the resistance detected? Replace the thermistor. Check the voltage(*) and appearance of the outdoor multi controller circuit board. Is the voltage normal value? Replace the outdoor multi controller circuit Is it free from any trace of overheating...
  • Page 27 1302 (UE): High pressure trouble Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints • High pressure abnormality (63H operation) • Faulty operation of stop valve (not fully open) 63H operates(*) during compressor operation. • Clogged or broken pipe (* 4.15 MPaG [602 psig]) •...
  • Page 28 1302 (UE): High pressure trouble Chart 2 of 4 Diagnosis of failure Continued from the previous page. (Clogged filter) Is the indoor unit filter clogged? Clean the filter. (Not clogged) (Dirty) Is there dirt on the indoor heat Wash the indoor heat exchanger. exchanger? (Not dirty) (Short-cycled)
  • Page 29 1302 (UE): High pressure trouble Chart 3 of 4 Diagnosis of failure Continued from the previous page. Is the resistance detected? Replace the TH7. Disconnect the indoor LEV wiring to check the resistance. Is the resistance detected? Replace the indoor LEV. Check the voltage(*) and appearance of the indoor controller board.
  • Page 30 1302 (UE): High pressure trouble Chart 4 of 4 Diagnosis of failure Continued from the previous page. Is the resistance detected? Replace the SV1. Is the connector for outdoor multi controller circuit board 63H discon- Reconnect the connector or connect it tightly. nected or loose? Check the 63HS voltage.
  • Page 31 1500 (U7): Superheat due to low discharge temperature trouble Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints 10 or more minutes after the compressor starts opera- • Disconnection or loose connection of TH4 tion, if a discharge superheat of -15°C [-27°F](*) or less is •...
  • Page 32 1500 (U7): Superheat due to low discharge temperature trouble Chart 2 of 2 Diagnosis of failure Continued from the previous page. Is the resistance detected? Replace the indoor LEV. Check the voltage and appearance of the indoor controller board. Is the voltage normal? Is it free from any trace of overheating Replace the indoor controller board.
  • Page 33 1501 (U2): Refrigerant shortage trouble Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints • All of the following conditions have been satisfied for 15 • Defective operation of stop valve (not fully open) consecutive minutes: • Defective thermistor - The compressor is operating in HEAT mode.
  • Page 34 1501 (U2): Refrigerant shortage trouble Chart 2 of 2 Diagnosis of failure Continued from the previous page. Is the resistance detected? Replace the thermistor. Check the 63HS voltage. Is the voltage(*) detected? Replace the 63HS. Check the voltage and appearance of the outdoor multi controller circuit board.
  • Page 35 1501 (U2): Closed valve in cooling mode Abnormal points and detection methods Causes and checkpoints Stop valve is closed during cooling operation. • Outdoor liquid/gas valve is closed. Both of the following temperature conditions have been • Malfunction of outdoor LEV (LEV1) (blockage) satisfied for 20 minutes or more during cooling operation.
  • Page 36 1503 (P6): Freeze protection of plate heat exchanger / Freeze pro- tection of branch box or indoor unit Abnormal points and detection methods Causes and checkpoints The purpose of the error code is to prevent indoor unit • Wrong piping connection between indoor unit and from freezing or condensation which is caused when a branch box refrigerant keeps flowing into the indoor unit that is not...
  • Page 37 1508 (EF): 4-way valve trouble in heating mode Abnormal points and detection methods Causes and checkpoints 4-way valve does not operate during heating operation. • 4-way valve failure Any of the following temperature conditions is satisfied for • Disconnection or failure of 4-way valve coil 3 minutes or more during heating operation •...
  • Page 38 4100 (UF): Compressor current interruption (Locked compressor) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Overcurrent of DC bus or compressor is detected within 30 • Closed stop valve seconds after the compressor starts the operation. •...
  • Page 39 4100 (UF): Compressor current interruption (Locked compressor) Chart 2 of 2 Diagnosis of failure Continued from the previous page. Connect the compressor wiring (U, V and W Are they connected properly? phase) properly, then turn the power back ON. Check whether the compressor is faultily grounded or not.
  • Page 40 4210 (UP): Compressor overcurrent interruption Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Overcurrent of DC bus or compressor is detected 30 or • Closed outdoor stop valve more seconds after the compressor starts the operation. •...
  • Page 41 4210 (UP): Compressor overcurrent interruption Chart 2 of 2 Diagnosis of failure Continued from the previous page. Connect the compressor wiring (U, V and W Are they connected properly? phase) properly, then turn the power back ON. Check the operation of indoor/outdoor fan motors.
  • Page 42 4220 (U9): Voltage shortage/Overvoltage/PAM error/L1 open phase/ Primary current sensor error/Power synchronization sig- nal error Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Any of the following symptoms are detected; • Decrease/increase of power supply voltage •...
  • Page 43 4220 (U9): Voltage shortage/Overvoltage/PAM error/L1 open phase/ Primary current sensor error/Power synchronization sig- nal error Chart 2 of 2 The black square (■) indicates a switch position. Diagnosis of failure Continued from the previous page. 7, 8 1-phase model Is the outdoor unit 1-phase model or Replace the outdoor power circuit board 3-phase model? (Defective outdoor power circuit board).
  • Page 44 4230 (U5): Heat sink temperature trouble Abnormal points and detection methods Causes and checkpoints TH8 detects a temperature outside the specified range • Blocked outdoor fan during compressor operation. • Malfunction of outdoor fan motor • Blocked airflow path TH8: Thermistor <Heat sink> •...
  • Page 45 4250 (U6): Power module trouble Abnormal points and detection methods Causes and checkpoints Both of the following conditions have been satisfied: • Short-circuit caused by looseness or disconnection of • Overcurrent of DC bus or compressor is detected during compressor wiring compressor operation.
  • Page 46 4400 (U8): Fan trouble (Outdoor unit) Abnormal points and detection methods Causes and checkpoints No rotational frequency is detected, a value outside the • Malfunction of fan motor specified range is detected during fan motor operation. • Disconnection of CNF connector •...
  • Page 47 5101 (U3): Compressor temperature thermistor (TH4) open/short <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints TH4 is found to be open/short. • Disconnection or contact failure of connectors (The open/short detection is disabled for 10 minutes after •...
  • Page 48 5102 (U4): Suction pipe temperature thermistor (TH6) open/short <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints TH6 is found to be open/short. • Disconnection or contact failure of connectors (The open/short detection is disabled for 10 seconds to 10 •...
  • Page 49 5105 (U4): Outdoor liquid pipe temperature thermistor (TH3) open/ short Abnormal points and detection methods Causes and checkpoints TH3 is found to be open/short. • Disconnection or contact failure of connectors (The open/short detection is disabled for 10 seconds to 10 •...
  • Page 50 5106 (U4): Ambient temperature thermistor (TH7) open/short Abnormal points and detection methods Causes and checkpoints TH7 is found to be open/short • Disconnection or contact failure of connectors • Faulty thermistor Open: • Defective outdoor multi controller circuit board −40°C [−40°F] or less Short: 90°C [194°F] or more TH7:...
  • Page 51 5109 (U4): HIC pipe temperature thermistor (TH2) open/short Abnormal points and detection methods Causes and checkpoints TH2 is found to be open/short. • Disconnection or contact failure of connectors • Faulty thermistor Open: • Defective outdoor multi controller circuit board −40°C [−40°F] or less Short: 90°C [194°F] or more...
  • Page 52 5110 (U4): Heat sink temperature thermistor (TH8) open/short Abnormal points and detection methods Causes and checkpoints TH8 (Internal thermistor) is found to be open/short. • Disconnection or contact failure of connectors • Faulty thermistor • Y model • Defective outdoor multi controller circuit board Open: −34.8°C [−30.6°F] or less Short:...
  • Page 53 5201 (F5): High pressure sensor (63HS) trouble Abnormal points and detection methods Causes and checkpoints • The detected pressure in the high pressure sensor is • Defective high pressure sensor 1kgf/cm [14PSIG] or less during operation, the com- • Decrease of internal pressure caused by gas leakage pressor stops operation and enters into an anti-restart •...
  • Page 54 5202 (F3): Low pressure sensor (63LS) trouble Abnormal points and detection methods Causes and checkpoints • The detected pressure in the low pressure sensor is • Defective low pressure sensor −2.3kgf/cm [-33 PSIG] or less, or 23.1kgf/cm [329 • Decrease of internal pressure caused by gas leakage PSIG] or more during operation, the compressor stops •...
  • Page 55 5300 (UH): Current sensor trouble Abnormal points and detection methods Causes and checkpoints The detected current sensor input value (primary current) • Decrease/Trouble of power supply voltage during compressor operation is outside the specified • Disconnection of compressor wiring range. •...
  • Page 56 6600 (A0): Duplex address error Abnormal points and detection methods Causes and checkpoints 2 or more units with the same address exist. • There are 2 units or more with the same address in their controller among outdoor unit, indoor unit, Fresh Master, Lossnay or remote controller.
  • Page 57 6602 (A2): Transmission processor hardware error Abnormal points and detection methods Causes and checkpoints The transmission line shows “1” although the transmission • A transmitting data collision occurred because of a processor 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.
  • Page 58 6603 (A3): Transmission bus BUSY error Abnormal points and detection methods Causes and checkpoints • Transmission fails due to collision and it continues for 8 • The transmission processor is unable to transmit due to 10 minutes. to a short-cycle voltage such as noise is mixed on the •...
  • Page 59 6606 (A6): Signal communication error with transmission proces- Abnormal points and detection methods Causes and checkpoints • The data of unit/transmission processor were not nor- • Accidental disturbance such as noise or lightning surge mally transmitted. • Hardware malfunction of transmission processor •...
  • Page 60 6607 (A7): No ACK error Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints ■ Common to all An abnormality detected by the sending side controller • The previous address unit does not exist since the ad- when receiving no ACK from the receiving side, though dress switch was changed while power was on.
  • Page 61 6607 (A7): No ACK error Chart 2 of 4 Abnormal points and detection methods Causes and checkpoints ■ The address/attribute of Lossnay was displayed: An abnormality detected by the indoor unit if it received no • An abnormality is detected when the indoor unit trans- ACK when transmitting signal to the Lossnay.
  • Page 62 6607 (A7): No ACK error Chart 3 of 4 Diagnosis of failure Note: • When the address of the outdoor unit is displayed as abnormal, the outdoor circuit board may be faulty. If the unit is not restored after conducting the following procedure, check the outdoor circuit board. Procedure 1: Turn the power OFF of indoor/outdoor unit, Fresh Master, Lossnay and remote controller...
  • Page 63 6607 (A7): No ACK error Chart 4 of 4 Diagnosis of failure Continued from the previous page. Apply the correct kind of transmission line, then Is the correct kind of transmission line perform the procedure 1. used? When operating in a single refrigerant system Is it operating different refrigerant (single indoor unit), the controller of the dis- systems?
  • Page 64 6608 (A8): No response frame error Abnormal points and detection methods Causes and checkpoints Although the sending side controller received ACK that • Continuous failure of transmission due to noise, etc. notifies the reception of signal, no response command is •...
  • Page 65 6831 (E0)/6834 (E4): MA communication receive error Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Detected in remote controller or indoor unit: • Contact failure of remote controller wiring • The main or sub remote controller cannot receive signal •...
  • Page 66 6831 (E0)/6834 (E4): MA communication receive error Chart 2 of 2 Diagnosis of failure Continued from the previous page. Refer to the chapter "Electrical Work". Is the wiring connected Connect the wiring properly as specified in the properly and meeting the chapter "Electrical Work"...
  • Page 67 6832 (E3)/6833 (E5): MA communication send error 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 cir- cuit •...
  • Page 68 6832 (E3)/6833 (E5): MA communication send error Chart 2 of 2 Diagnosis of failure Continued from the previous page. Refer to the chapter "Electrical Work". Connect the wiring properly as specified in the Is the wiring connected properly chapter "Electrical Work" in the indoor unit and meeting the conditions? Installation Manual.
  • Page 69 7100 (EF): Total capacity error Abnormal points and detection methods Causes and checkpoints The sum of the model class of the connected indoor units • The total of number on connected indoor unit model exceeds the specified value (130% of the outdoor unit names exceeds the specified capacity level.
  • Page 70 7101 (EF): Capacity code error Abnormal points and detection methods Causes and checkpoints • A connected indoor unit is incompatible, error code The model name of connected indoor unit (capacity code) is read as incompatible. 7101 is displayed. The connectable indoor units are: •...
  • Page 71 7102 (EF): Connecting excessive number of units and branch box- Abnormal points and detection methods Causes and checkpoints The number of the connected indoor units exceeds the Connecting more indoor units and branch boxes than the limit, error code 7102 is displayed. limit.
  • Page 72 7105 (EF): Address setting error Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints The address setting of connected outdoor unit is wrong. There is a unit without correct address setting in the range specified in the installation manual. Diagnosis of failure <Outdoor unit>...
  • Page 73 7105 (EF): Address setting error Chart 2 of 2 Diagnosis of failure <M-NET RC (main)> Check whether the M-NET RC (main) address is set in 000, or in the range of 101 to 150. Set the address properly, then turn the power OFF of indoor/outdoor unit, Fresh Master, Lossnay and remote controller simultaneously Is the address setting correct?
  • Page 74 7130 (EF): Incompatible unit combination error Abnormal points and detection methods Causes and checkpoints The connected indoor unit is not compatible with the out- Connecting indoor unit(s) which is not authorized to con- door unit, the outdoor unit detects the error at startup. nect to the outdoor unit.
  • Page 75 8-2. Remote controller diagnosis Refer to “Remote controller check” for MA remote controller system. 8-3. Remote controller trouble 8-3-1. M-NET remote controller systems Symptom or inspection code Cause Though the content of operation is displayed on the re- • The power supply of the indoor unit is not on. mote controller, some indoor units do not operate.
  • Page 76 8-3-2. For MA remote controller systems Symptom or inspection code Cause Though the content of operation is displayed on the re- • The power supply of the indoor unit is not on. mote controller, some indoor units do not operate. •...
  • Page 77 8-4. The following symptoms do not represent product failure Symptom Cause Even the cooling (heating) operation selection button is The indoor unit cannot cool (heat) if other indoor units are pressed, the indoor unit cannot be operated. heating (cooling). Display: "Cooling (Heating)" blinks The auto vane runs freely.
  • Page 78 Function Operation in each switch setting Purpose Additional information When to set Select operating With Without Before turning Turn ON when the centralized • SW2-1 must be turned ON if a centralized control- system startup centralized centralized the power ON controller is connected to the ler is connected to the system.
  • Page 79 *2. SW5-7 Opens the indoor-linear expansion valve as a countermeasure against the indoor unit in FAN, COOL, STOP, or thermo-OFF operation with refrigerant-shortage status due to an accumulation of liquid refrigerant in the indoor unit. *3. SW5-8 Countermeasure against room temperature rise for indoor unit in FAN and COOL mode. ■...
  • Page 80 ■ SW9: Function switch Initial setting 2 3 4 The black square (■) indicates a switch position. Function Operation in each switch setting Purpose Additional information When to set Auto change over from Activated Deactivated Before Enables the indoor unit with the minimum Cannot be set when the centralized remote controller (IC turning the...
  • Page 81 8-7. How to check the parts 8-7-1. Checkpoints for each part ■ Thermistors Disconnect the connector then measure the resistance with a multimeter (at the ambient temperature 10 to 30°C [50 to 80°F]). Thermistors Normal Abnormal TH4 (Compressor) 160 to 410 kΩ Open or short TH2 (HIC pipe) 4.3 to 9.6 kΩ...
  • Page 82 8-7-2. Check method of DC fan motor (fan motor/outdoor multi controller circuit board) ■ Precaution • 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.) ■...
  • Page 83 8-8. How to check the components 8-8-1. Thermistor feature chart ■ Low temperature thermistors • TH2 (HIC pipe) • TH3 (Outdoor liquid pipe) • TH6 (Suction pipe) • TH7 (Ambient) Thermistor R0 = 15 kΩ ± 3 % B constant = 3480 ± 1 % =15exp{3480( –...
  • Page 84 8-8-2. High pressure sensor ■ The methods of 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. 2 3 4 5 6 7 8 The black square (■) indicates a switch position.
  • Page 85 8-8-3. Low pressure sensor ■ The methods of 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. 2 3 4 5 6 7 8 The black square (■) indicates a switch position.
  • Page 86 8-9. Test point diagram ■ Outdoor multi controller circuit board Caution: • TEST POINT 1 is high voltage. CN51 External signal Pump down Test run Manual defrost Model selection output CN102 Connect to the M-NET P.B (M-NET power circuit board) CN40,CN41 Centralized control power supply/ For storing...
  • Page 87 ■ 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 88 ■ M-NET power circuit board Connect to the outdoor multi controller circuit board (CN102) – : 24 – 30 V DC – : 24 – 30 V DC Connect to the electrical parts box • Connect to the outdoor noise filter circuit board (CNAC1) (Y) •...
  • Page 89 ■ Outdoor noise filter circuit board CNCT Primary current Connect to the outdoor power circuit board (CN5) Connect to the electrical parts box Connect to the electrical parts box LO1, LO2, LO3 POWER SUPPLY LO1-LO2/LO2-LO3/ CNAC2 LO3-LO1: 400V AC input Connect to the outdoor 230 V AC power circuit board...
  • Page 90 8-10. Outdoor unit information display SW: setting 0: OFF 1: ON Contents LED1, 2 setting No. 12345678 00000000 Relay output (at Compressor 21S4 (SV2) Always — — normal state) operation lighting Error code (at 0000–9999 (Alternating display of addresses and error code) abnormal state) Note: When abnormality occurs, check display.
  • Page 91 Contents LED1, 2 setting No. 12345678 00011000 Indoor unit No.1 unit No.2 unit No.3 unit No.4 unit No.5 unit No.6 unit No.7 unit No.8 unit operation mode mode mode mode mode mode mode mode mode Cooling: light on, Heating: light blinking, Stop fan: light off 10011000 Indoor unit No.1 unit No.2 unit...
  • Page 92 Contents LED1, 2 setting No. 12345678 00101100 Outdoor LEV-A 0–2000 (pulse) opening pulse Note: Display of opening pulse of outdoor LEV 10101100 Outdoor LEV-A opening pulse abnormality delay 01101100 Outdoor LEV-A opening pulse abnormality 11101100 Outdoor LEV-B opening pulse 00011100 Outdoor LEV-B opening pulse abnormality delay 10011100 Outdoor LEV-B...
  • Page 93 Contents LED1, 2 setting No. 12345678 107 11010110 Target outdoor SCm (0.0–20.0) (°C) SC (cooling) Note: Display of all control target data 108 00110110 Target indoor SC/ SCm/SHm (0.0–20.0) (°C) SH (IC1) Note: Display of all control target data 109 10110110 Target indoor SC/ SH (IC2) 110 01110110 Target indoor SC/ SH (IC3)
  • Page 94 Contents LED1, 2 setting No. 12345678 141 10110001 OC SC (cooling) −99.9–999.9(°C) at time of During heating: subcool (SC) abnormality delay During cooling: superheat (SH) (Fixed to “0” during cooling operation) 142 01110001 IC1 SC/SH at Note: Display of data from high pressure sensor, all thermistors, and SC/SH at time of abnormality delay time of abnormali- ty delay 143 11110001 IC2 SC/SH at...
  • Page 95 Contents LED1, 2 setting No. 12345678 189 10111101 History of voltage PAM error Converter Power L1 open Under voltage Over voltage error (U9/4220) Fault synchroniza- phase error error error — — tion signal error 190 01111101 External connec- CN3N 1-3 CN3N 1-2 CN3S 1-2 CN3D 1-3...
  • Page 96 Contents LED1, 2 setting No. 12345678 220 00111011 IC6 TH23 (Gas) −99.9–999.9 (°C) 221 10111011 IC7 TH23 (Gas) Note: Display detected data of indoor unit thermistor 222 01111011 IC8 TH23 (Gas) 223 11111011 IC6 TH22 (liquid) 224 00000111 IC7 TH22 (liquid) 225 10000111 IC8 TH22 (liquid) 226 01000111 IC6 TH21 (intake) 227 11000111 IC7 TH21 (intake)

  • Page 97: Disassembly Procedure

    DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. Note: • Turn OFF the power supply before disassembly. Removing the service panel and top panel 1. Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service pan- 2.
  • Page 98 • Low pressure sensor (63LS) • 4-way valve (21S4) • Bypass valve (SV1) Pull out the disconnected wires from the electrical parts box. 5. Remove the terminal cover and disconnect the compressor lead wire. 6. Remove 2 electrical parts box fixing screws (4 × 10) and detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.
  • Page 99 4. Loosen the wire clamps on top of the electrical parts box. (See Photo 6) 5. Pull out the thermistor <Ambient> (TH7) from the sensor holder. Note: • When replacing thermistor <Ambient> (TH7), replace it together with thermistor <Suction pipe> (TH6), since they are combined together.
  • Page 100 Photo 11 4-way valve coil (21S4) 4-way valve 4-way valve coil fixing screw Removing bypass valve coil (SV1) and bypass 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.
  • Page 101 • The welded part can be removed easily after removing the side panel (R). • When installing the low pressure sensor and high pressure sensor, cover them with a wet cloth to prevent them from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized. Photo 12 Low pressure Bypass valve...
  • Page 102 Photo 14 Electrical parts box Reactor Bottom plate of electrical parts box Screws Connectors of reactor Screws 14. Removing the compressor (MC) 1. Remove the service panel. (See Photo 1) 2. Remove the top panel. (See Photo 1) 3. Remove 2 cover panel (front) fixing screws (5 × 12) and remove the cover panel (front). (See Photo 4) 4.
  • Page 103 Photo 16 Photo 17 Accumulator Outlet Accumulator leg Accumulator leg fixing screws Inlet Accumulator OCH791 _103...

  • Page 104: System Construction

    10 SYSTEM CONSTRUCTION 10-1. Example of refrigerant piping and transmission cable wiring OCH791 _104...
  • Page 105 10-2. Special function operation and settings for M-NET remote control- Refer to “Special function operation and settings” for setting details. 10-3. Refrigerant system diagram 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...

  • Page 106: Electrical Wiring

    11 ELECTRICAL WIRING Refer to installation manual “6. Electrical work” for details. OCH791 _106...

  • Page 107: Refrigerant Piping Tasks

    12 REFRIGERANT PIPING TASKS 12-1. Refrigerant piping system Refer to installation manual “Pipe length and height difference” for refrigerant piping system. 12-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 12-2-1. Introduction R410A refrigerant of this air conditioner is non-toxic and non-flammable but leaking of large amount from an indoor unit into the room where the unit is installed may be deleterious.

  • Page 108: Remote Controller

    13 REMOTE CONTROLLER 13-1. Remote controller functions 13-1-1. PAR-41MAA Controller interface Main display Main menu Main Main menu Room Cool Set temp. Auto Room Energy saving Cool Set temp. Auto Mode Temp. Mode Temp. Menu screen Function guide Operation Vane·Louver·Vent. (Lossnay) High power Comfort Main display:...
  • Page 109 ■ Full mode ■ Basic mode All icons are displayed for explanation. Auto Cool Set temp. Room Set temp. Auto Cool Mode Temp. Mode Temp. Note: • Most settings (except ON/OFF, mode, fan speed, temperature) can be made from the main menu. 1.
  • Page 110 Vane · 3D i-See · Vent. (Lossnay) Operation High power Manual vane angle Comfort 3D i-See sensor Vertical air direction Horizontal air direction ON/OFF timer Timer Auto-OFF timer Weekly timer Timer menu OU silent mode Night setback Temp. range Restriction Operation locked Energy saving Auto return...
  • Page 111 Main menu Setting and display items Setting details Timer Timer ON/OFF timer Use to set the operation ON/OFF times. • Time can be set in 5-minute increments. Auto-OFF timer Use to set the Auto-OFF time. • Time can be set to a value from 30 to 240 in 10-minute increments. Weekly timer Use to set the weekly operation ON/OFF times.
  • Page 112 13-1-2. PAR-SL97A-E Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Timer Off button Fan Speed button (Changes fan speed)
  • Page 113 *1. This button is enabled or disabled depending on the model of the indoor unit. Display Operation mode Not available Cool Appetars when a non-supported function is selected. Auto (single set point) Battery replacement indicator Auto Heat (dual set Appears when the remaining battery point) power is low.
  • Page 114 Error information Error information Error code Contact information Error unit Unit#1 Dealer Time Occurred 2/ 1 4:48 Reset error: Reset button Reset error: Reset button Page Reset Page Reset blinks 2. Reset the error • Press the F4 button or the [ ] button to reset the error that is occurring.
  • Page 115 Service menu will appear if the password matches. Test run Input maintenance info. Settings Check Others Notes: • The initial maintenance password is ˝9999˝. Change the default password as necessary to prevent unauthorized access. Have the password available for those who need it. •...
  • Page 116 Notes: • 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 available only for the model with vanes. Test run Remain Auto Auto Ind.
  • Page 117 : Switch the airflow direction and start the test run. : Switch the louver and start the test run. : Start the test run. 3. Stop the test run. • Press the button to stop the test run. • After 2 hours, the stop signal is transmitted. 13-4-4.
  • Page 118 Settings menu Function setting Lossnay Service menu: Cursor 2. Set the function. • Press the F1 or F2 button to move the cursor to one of the following: M-NET address, function setting number, or setting value. • Press the F3 or F4 button to change the settings to the desired settings. •...
  • Page 119 • Press the TEMP button to set a mode. • Direct the wireless remote controller toward the receiver of the indoor unit and press the button. → The sensor-operation indicator will blink and beeps will be emitted to indicate the setting number. Setting number: 1 = 1 beep (0.4 seconds each) 2 = 2 beeps (0.4 seconds each, repeated twice) 3 = 2 beeps (0.4 seconds each, repeated 3 times)
  • Page 120 4. Select the setting number • Press the button to change the setting number C. • Direct the wireless remote controller toward the receiver of the indoor unit and press the button. 5. Select multiple functions continuously • Repeat the steps 3 and 4 to change multiple function settings continuously. 6.
  • Page 121 Error history Error Unt# dd/mm/yy Check menu: Delete Page 4. Delete the error history • Press the F4 button (Delete) on the screen that shows error history. A confirmation screen will appear asking if you want to delete the error history. •...
  • Page 122 Self check Self check M-NET address M-NET address Delete error history? Error history deleted Return: Cancel 13-7-2. PAR-SL97A-E When a malfunction occurs to air conditioners, both of the indoor unit and the outdoor unit will stop and the operation lamp will blink to inform the unusual stop. Operating instructions CHECK 1.
  • Page 123 13-8. Remote controller check Operating instructions If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Go to the “Remote controller check” screen. • Select ˝Service˝ from the main menu, and press the [ ] button.
  • Page 124 • Send-receive circuit fault. The remote controller needs to be replaced. ERC: • The number of data errors is the discrepancy between the number of bits in the data transmitted from the remote controller and that of the data that was actually transmitted over the transmission line. If data errors are found, check the transmission line for external noise interference.
  • Page 125 Touch the [Set] button to save the setting. 2. To search for an interlocked setting • Touch the [Conf] button to display in the left column the addresses of the units that are interlocked with the unit whose address was set in the Add. 1 section. 3.
  • Page 126 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN © Copyright 2022 MITSUBISHI ELECTRIC CORPORATION Published: Jun. 2022 No. OCH791 Made in Japan Specifications are subject to change without notice.
  • Page 127 Related Links Model Number: PUMY-P200YKM3 PUMY-P200YKM3_Declaration of Conformity (UK2022A11) PUMY-P200YKM3_InstallationManual (BH79D826H10) PUMY-P200YKM3_Parts Catalogue (OCB791) PUMY-P200YKM3_ServiceManual (OCH791) Y Series Mini VRF Twin Fan 12.5-33.5kW Product Information Sheet...

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