Mitsubishi Electric PUMY-P60NKMU1 Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

[Service Ref.]

[Model name]

PUMY-P60NKMU1

Salt proof model

PUMY-P60NKMU1-BS

Model name

indication

OUTDOOR UNIT

REVISED EDITION-B

Revision:

• Corrected some descrip-

tions in "4-2. CORRECTION

BY TEMPERATURE" in

REVISED EDITION-B.

• Some other descriptions

have been also modified.

OCH613 REVISED EDITION-B

is void.

Note:

• This service manual describes

CONTENTS

1. SAFETY PRECAUTION ..................................... 2

2. OVERVIEW OF UNITS ....................................... 5

3. SPECIFICATIONS ............................................ 10

4. DATA ................................................................. 11

5. OUTLINES AND DIMENSIONS ....................... 24

6. WIRING DIAGRAM ........................................... 25

7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION ....... 26

8. TROUBLESHOOTING ...................................... 36

9. ELECTRICAL WIRING ................................... 111

10. REFRIGERANT PIPING TASKS .................... 116

11. DISASSEMBLY PROCEDURE .......................120

PARTS CATALOG (OCB613)

HFC

utilized

R410A

February 2018

No. OCH613

technical data of the outdoor

units only.

Table of Contents

Summary of Contents for Mitsubishi Electric PUMY-P60NKMU1

Page 1: Table Of Contents
TECHNICAL & SERVICE MANUAL Revision: <Outdoor unit> [Service Ref.] • Corrected some descrip- [Model name] tions in "4-2. CORRECTION PUMY-P60NKMU1 BY TEMPERATURE" in PUMY-P60NKMU1 REVISED EDITION-B. • Some other descriptions have been also modified. OCH613 REVISED EDITION-B Salt proof model is void.
Page 2: Safety Precaution
SAFETY PRECAUTION 1-1. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. Avoid using thin pipes. Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.
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. Auxiliary HEATING ON/OFF CONTROL SET-UP (1) Auxiliary heating operation controls another heat source that depends on the main system's operations, which means the interlock operation shown in "b)" will be possible. Indoor unit must be R410A UL model for this function to operate. b) Different Indoor unit applications that can be applied: (2) Outdoor unit DIPSW5-4 for auxiliary heating control: Set DIPSW5-4 when power is turned off at unit.
Page 6 (4) Determine fan airflow setting during indoor thermo-OFF conditions: a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options. b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller". Auxiliary heating Fan speed Fan speed...
Page 7 (6) Locally procured wiring A basic connection method is shown. (i.e. interlocked operation with the electric heater with the fan speed setting on high) Indoor unit Outdoor unit Remote control Board Relay circuit control board control board Adapter Dip switch SW5-4 "ON"...
Page 8 2-2. UNIT CONSTRUCTION Outdoor unit PUMY-P60NKMU1 PUMY-P60NKMU1-BS Capacity Type 06 to Type 72 Applicable Number of units 1 to 12 unit indoor unit Total system wide capacity 50 to 130% of outdoor unit capacity CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E Branching pipe Branch header...
Page 9 2-3. UNIT SPECIFICATIONS (1) Outdoor Unit PUMY-P60NKMU1 Service Ref. PUMY-P60NKMU1-BS Capacity Cooling (kBTU/h) 60.0 Heating (kBTU/h) 66.0 Compressor (kW) Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C] Outdoor D.B. 95°F/W.B. 75°F: [D.B. 35°C/W.B. 23.9°C]...
Page 10: Specifications
Control, Driving mechanism DC control Motor output 0.2+0.2 External static press. Compressor Type x Quantity Scroll hermetic compressor x 1 Manufacture Mitsubishi Electric Corporation Starting method Inverter Capacity control Cooling: 36 to 100 Heating: 22 to 100 Motor output Case heater Lubricant FV50S (2.3 liter)
Page 11: Data
DATA 4-1. SELECTION OF COOLING/HEATING UNITS How to determine the capacity when less than or equal 100% indoor model size units are connected in total: The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference. Determine the load (L) and the Indoor/Outdoor Temperature Temporarily select the Indoor/Outdoor Units...
Page 12 How to determine the capacity when greater than 100% indoor model size units are connected in total: for reference. Determine the load (L) and the Indoor/Outdoor Temperature Temporarily select the indoor/outdoor units Reselect the indoor units Reselect the indoor units Reselect the outdoor units Reselect the outdoor units Indoor Unit...
Page 13 <Cooling> Design Condition Outdoor Design Dry Bulb Temperature 98.6ºF (37.0ºC) Total Cooling Load 54.0 kBTU/h Room1 Indoor Design Dry Bulb Temperature 80.6ºF (27.0ºC) Indoor Design Wet Bulb Temperature 68.0ºF (20.0ºC) Cooling Load 26.0 kBTU/h Room2 Indoor Design Dry Bulb Temperature 75.2ºF (24.0ºC) Indoor Design Wet Bulb Temperature 66.2ºF (19.0ºC)
Page 14 <Heating> Design Condition Outdoor Design Wet Bulb Temperature 35.6ºF (2.0ºC) Total Heating Load 55.0 kBTU/h Room1 Indoor Design Dry Bulb Temperature 69.8ºF (21.0ºC) Heating Load 26.5 kBTU/h Room2 Indoor Design Dry Bulb Temperature 73.4ºF (23.0ºC) Heating Load 28.5 kBTU/h <Other> Indoor/Outdoor Equivalent Piping Length 100 ft Capacity of indoor unit...
Page 15 3. Power input of outdoor unit Outdoor unit : PUMY-P60 Indoor unit 1 : PEFY-P27 Indoor unit 2 : PEFY-P30 <Cooling> (1) Rated power input of outdoor unit 4.68 kW (2) Calculation of the average indoor temperature power input coefficient Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp.
Page 16 <Heating> (1) Rated power input of outdoor unit 5.45 kW (2) Calculation of the average indoor temperature power input coefficient Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 26.6°F [ 3°C] W.B., Indoor temp. 70°F [21.1°C] D.B.) 1.16 (Refer to “4-2.
Page 17 4-2. CORRECTION BY TEMPERATURE CITY MULTI could 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 PUMY Nominal BTU/h...
Page 18 <Heating> Figure 9 Indoor unit temperature correction To be used to correct indoor unit capacity only PUMY Nominal BTU/h 66,000 heating capacity Input 5.45 [°C W.B.] 60.8 62.6 64.4 66.2 69.8 71.6 73.4 75.2 78.8 80.6 [°F W.B.] Indoor Temperature Figure 10 Outdoor unit temperature correction To be used to correct outdoor unit capacity only Indoor Temperature...
Page 19 4-3. STANDARD OPERATION DATA (REFERENCE DATA) PUMY-P60NKMU1 Operation PUMY-P60NKMU1-BS 80°F / 67°F 70°F / 60°F Indoor [26.7°C / 19.4°C] [21.1°C / 15.6°C] Ambient DB/WB temperature 95°F / 75°F 47°F / 43°F Outdoor [35.0°C / 23.9°C] [8.3°C / 6.1v] No. of connected units...
Page 20 Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on "4-1-1. Method for obtaining system cooling and heating capacity". 4-4-1. PUMY-P60NKMU1(-BS) <cooling> PUMY Nominal cooling capacity BTU/h...
Page 21 4-4-2. PUMY-P60NKMU1(-BS) <heating> PUMY Nominal heating capacity BTU/h 66,000 Input 5.67 Current (208V) 28.5 Current (230V) 25.7 Total capacity of indoor units (kBTU/h) Total capacity of indoor units (kBTU/h) 208, 230 V Total capacity of indoor units (kBTU/h) OCH613B...
Page 22 (2) During heating, find the equivalent piping length, and find the capacity ratio corresponding to standard piping length from Figure 12. Then multiply by the heating capacity from Figure 9 and 10 in "4-2. CORRECTION BY TEMPERATURE" to obtain the actual capacity. (1) Capacity Correction Curve Figure 11 PUMY-P60NKMU1(-BS) <Cooling> Total capacity of indoor unit 1.00 0.95...
Page 23 4-6. NOISE CRITERION CURVES PUMY-P60NKMU1 SPL(dB) MODE LINE PUMY-P60NKMU1-BS COOLING HEATING NC-70 MICROPHONE NC-60 UNIT [3.3 ft] NC-50 NC-40 1.5 m [4.9 ft] NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE GROUND 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...
Page 24: Outlines And Dimensions
OUTLINES AND DIMENSIONS PUMY-P60NKMU1 PUMY-P60NKMU1-BS Unit: mm<inch> OCH613B...
Page 25: Wiring Diagram
WIRING DIAGRAM PUMY-P60NKMU1 PUMY-P60NKMU1-BS SYMBOL NAME Terminal Block <Power Supply> MULTI. B. LEV-A LEV-B TH7 TH6 TH3 TH4 Terminal Block 63LS 63HS <Indoor/Outdoor Transmission Line> is the switch position. Terminal Block <Centralized Control Transmission Line> CN3D CN3S CN3N SWU2 SWU1 SW9...
Page 26: Necessary Conditions For System Construction
NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 7-1. TRANSMISSION SYSTEM SETUP OCH613B...
Page 27 7-2. Special Function Operation and Settings for M-NET Remote Controller For the detailed procedure of "group settings" and "paired settings", refer to the remote controller's manuals. 7-3. REFRIGERANT SYSTEM DIAGRAM PUMY-P60NKMU1 PUMY-P60NKMU1-BS Service Check valve Thermistor (TH7) port (High pressure)
Page 28 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 a M-NET remote controller system (address setting is necessary.) Example of wiring control cables Wiring Method and Address Setting a.
Page 29 • Name, Symbol and the Maximum Remote controller Units for Connection Name Symbol Maximum units for connection Outdoor unit — M-NET control M-IC 1 OC unit can be connected to 1 to 12 (P60) M-IC units Indoor unit M-NET remote M-NET RC Maximum 2 M-NET RC for 1 indoor unit, Maximum 12 M-NET RC for 1 OC controller Permissible Lengths...
Page 30 B. Example of a group operation system with 2 or more outdoor units and a 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 31 • Name, Symbol, and the Maximum Units for Connection [ 1640 ft [500 m] (AWG 16 [1.25 mm²]) • Longest length via outdoor units : L • Longest transmission cable length : L [ 656 ft [200 m] (AWG 16 [1.25 mm²]) •...
Page 32 C. Example of a controller system (address setting is not necessary.) NOTE : In the case of same group operation, need to set the address that is only main M-NET control indoor unit. Example of wiring control cables Wiring Method and Address Setting 1.
Page 33 Permissible Lengths Prohibited items The MA remote controller and the Longest transmission cable length: [ 656 ft [200 m] (AWG 16 M-NET remote controller cannot be used together with the M-NET con- [1.25 mm²]) trol indoor unit of the same group. MA remote controller cable length: [ 656 ft [200 m] (AWG 22 (00)
Page 34 D. Example of a group operation with 2 or more outdoor units and a 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 35 • Name, Symbol, and the Maximum Units for Connection [ 1640 ft [500 m] (AWG 16 [1.25 E] or more) Longest length via outdoor unit (M-NET cable): L and L [ 656 ft [200 m] (AWG 16 [1.25 E] or more) Longest transmission cable length (M-NET cable): L and L and L...
Page 36: Troubleshooting
TROUBLESHOOTING 8-1. CHECK POINTS 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 37 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 38 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 39 8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART Check code Serial communication error 0403 (Ed) Abnormal points and detection methods Causes and checkpoints Abnormal if 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. Malfunction of communication circuit to power circuit board on outdoor multi controller circuit board Malfunction of communication circuit on outdoor...
Page 40 Check code Compressor temperature trouble 1102 (U2) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints (1) Abnormal if TH4 falls into following temperature conditions; Malfunction of stop valve Over-heated compressor operation caused by ●exceeds 230°F [110:] continuously for 5 minutes shortage of refrigerant ●exceeds 257°F [125:] Defective thermistor...
Page 41 Check code Compressor temperature trouble 1102 (U2) Chart 2 of 2 ●Diagnosis of defectives 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 42 Check code High pressure trouble 1302 (UE) Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints <63H equipped model (63HS non-equipped)> Defective operation of stop valve (not fully open) (1) High pressure abnormality (63H operation) Clogged or broken pipe Abnormal if 63H operates(*) during compressor operation.
Page 43 Check code High pressure trouble 1302 (UE) Chart 2 of 4 ●Diagnosis of defectives 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 ﬁ lter clogged? Clean the ﬁ...
Page 44 Check code High pressure trouble 1302 (UE) Chart 3 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the TH7.
Page 45 Check code High pressure trouble 1302 (UE) Chart 4 of 4 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the SV1.
Page 46 Check code Superheat due to low discharge temperature trouble 1500 (U7) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Abnormal if the discharge superheat is continuously detected −27°F [−15 ] Disconnection or loose connection of TH4 or less (*) for 5 minutes even though the indoor LEV has minimum open Defective holder of TH4 pulse after the compressor starts operating for 10 minutes.
Page 47 Check code Superheat due to low discharge temperature trouble 1500 (U7) Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the indoor LEV.
Page 48 Check code Refrigerant shortage trouble 1501 (U2) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints (1) Abnormal when all of the following conditions are satisﬁ ed for 15 Defective operation of stop valve (not fully open) consecutive minutes: Defective thermistor 1.The compressor is operating in HEAT mode.
Page 49 Check code Refrigerant shortage trouble 1501 (U2) Chart 2 of 2 ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page Is there a resistance detected? Replace the thermistor.
Page 50 Check code Closed valve in cooling mode 1501 (U2) Abnormal points and detection methods Causes and checkpoints Abnormal if stop valve is closed during cooling operation. Outdoor liquid/gas valve is closed. Malfunction of outdoor LEV (LEV1)(blockage) Abnormal when both of the following temperature conditions are satisﬁ ed for 20 minutes or more during cooling operation.
Page 51 Check code 4-way valve trouble in heating mode 1508 (EF) Abnormal points and detection methods Causes and checkpoints Abnormal if 4-way valve does not operate during heating operation. 4-way valve failure Disconnection or failure of 4-way valve coil Abnormal when any of the following temperature conditions is satisﬁ ed for Clogged drain pipe 3 min.
Page 52 Check code Compressor current interruption (Locked compressor) 4100 (UF) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Abnormal if overcurrent of DC bus or compressor is detected before 30 Closed stop valve seconds after the compressor starts operating. Decrease of power supply voltage Looseness, disconnection, or wrong phase of compressor wiring connection...
Page 53 Check code Compressor current interruption (Locked compressor) 4100 (UF) Chart 2 of 2 ●Diagnosis of defectives 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 Are they connected properly? W phase) properly, then turn the power back ON.
Page 54 Check code Compressor overcurrent interruption 4210 (UP) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Abnormal if overcurrent of DC bus or compressor is detected after 30 Closed outdoor stop valve seconds since the compressor starts operating. Decrease of power supply voltage Looseness, disconnection, or wrong phase of compressor wiring connection...
Page 55 Check code Compressor overcurrent interruption 4210 (UP) Chart 2 of 2 ●Diagnosis of defectives 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 Are they connected properly? W phase) properly, then turn the power back ON.
Page 56 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 Abnormal if any of following symptoms are detected; 1 Decrease/increase of power supply voltage, 2 Primary current sensor failure ●Decrease of DC bus voltage to 200 V 3 Disconnection of compressor wiring...
Page 57 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 defectives 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 58 Check code Heat sink temperature trouble 4230 (U5) Abnormal points and detection methods Causes and checkpoints Abnormal if TH8 detects a temperature outside the speciﬁ ed range during Blocked outdoor fan compressor operation. Malfunction of outdoor fan motor Blocked airﬂ ow path Thermistor <Heat sink>...
Page 59 Check code Power module trouble 4250 (U6) Abnormal points and detection methods Causes and checkpoints Abnormal if both of the following conditions are satisﬁ ed: Short-circuit caused by looseness or disconnection of compressor wiring 1. Overcurrent of DC bus or compressor is detected during compressor operation.
Page 60 Check code Fan trouble (Outdoor unit) 4400 (U8) Abnormal points and detection methods Causes and checkpoints Abnormal if no rotational frequency is detected, or detected a value Malfunction of fan motor outside the speciﬁ ed range during fan motor operation. Disconnection of CNF connector Defective outdoor multi controller circuit board ●Diagnosis of defectives...
Page 61 Check code Compressor temperature thermistor (TH4) open/short 5101 (U3) <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints Abnormal 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 62 Check code Suction pipe temperature thermistor (TH6) open/short 5102 (U4) <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints Abnormal 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 63 Check code Outdoor liquid pipe temperature thermistor (TH3) open/short 5105 (U4) Abnormal points and detection methods Causes and checkpoints Abnormal 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 64 Check code Ambient thermistor (TH7) open/short 5106 (U4) Abnormal points and detection methods Causes and checkpoints Abnormal if TH7 detects to be open/short. Disconnection or contact failure of connectors Open: −40°F [−40 ] or less Characteristic defect of thermistor Short: 194°F [90 ] or more TH7: Thermistor <Ambient>...
Page 65 Check code HIC pipe temperature thermistor (TH2) open/short 5109 (U4) Abnormal points and detection methods Causes and checkpoints Abnormal if TH2 detects to be open/short. Disconnection or contact failure of connectors Open:−40°F [−40 ] or less Characteristic defect of thermistor Short: 194°F [90 ] or more TH2: Thermistor <HIC pipe>...
Page 66 Check code Heat sink temperature thermistor (TH8) open/short 5110 (U4) Abnormal points and detection methods Causes and checkpoints Abnormal if TH8 (Internal thermistor) detects to be open/short. Disconnection or contact failure of connectors Open: −31.2°F [−35.1 ] or more Characteristic defect of thermistor Short: 338.5°F [170.3 ] or less Defective outdoor multi controller circuit board TH8: Thermistor <Heat sink>...
Page 67 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 14 PSIG or Defective high pressure sensor less during operation, the compressor stops operation and enters into Decrease of internal pressure caused by gas an anti-restart mode for 3 minutes.
Page 68 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 −33 PSIG Defective low pressure sensor or less, or 329 PSIG or more during operation, the compressor stops Decrease of internal pressure caused by gas operation with a check code <5202>.
Page 69 Check code Primary current error 5300 (UH) Abnormal points and detection methods Causes and checkpoints Abnormal if any of the following conditions is detected: Decrease/trouble of power supply voltage 1 Primary current sensor detects any of the following conditions (single Disconnection of compressor wiring phase unit only): Current sensor trouble on outdoor power circuit...
Page 70 Check code Duplex address error 6600 (A0) Abnormal points and detection methods Causes and checkpoints Abnormal 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 defectives...
Page 71 Check code Transmission processor hardware error 6602 (A2) Abnormal points and detection methods Causes and checkpoints Abnormal if 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 Malfunction of transmitting circuit on transmission...
Page 72 Check code Transmission bus BUSY error 6603 (A3) Abnormal points and detection methods Causes and checkpoints Over error by collision The transmission processor is unable to transmit due Abnormal if no-transmission status caused by a transmitting data to a short-cycle voltage such as noise is mixed on collision is consecutive for 8 to 10 minutes.
Page 73 Check code Signal communication error with transmission processor 6606 (A6) Abnormal points and detection methods Causes and checkpoints Abnormal if the data of unit/transmission processor were not normally Accidental disturbance such as noise or lightning transmitted. surge Hardware malfunction of transmission processor Abnormal if the address transmission from the unit processor was not normally transmitted.
Page 74 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 75 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 76 Check code No ACK error 6607 (A7) Chart 3 of 4 ●Diagnosis of defectives 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 77 Check code No ACK error 6607 (A7) Chart 4 of 4 ●Diagnosis of defectives 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 78 Check code No response frame error 6608 (A8) Abnormal points and detection methods Causes and checkpoints Abnormal 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 79 Check code MA communication receive error 6831,6834 (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 80 Check code MA communication receive error 6831,6834 (E3/E5) Chart 2 of 2 ●Diagnosis of defectives 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 81 Check code MA communication send error 6832 6833 (EF) 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 82 Check code MA communication send error 6832 6833 (EF) Chart 2 of 2 ●Diagnosis of defectives 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 83 Check code Total capacity error 7100 (EF) Abnormal points and detection methods Causes and checkpoints When the total capacity of connected indoor units exceeds the speciﬁ ed The total capacity of connected indoor units capacity (130% of the outdoor unit capacity), a check code <7100> is exceeds the speciﬁ...
Page 84 Check code Capacity code error 7101 (EF) Abnormal points and detection methods Causes and checkpoints When a connected indoor unit is incompatible, a check code <7101> is The model name of connected indoor unit (model code) displayed. is read as incompatible. The connectable indoor units are: ·...
Page 85 Check code Connecting unit number error 7102 (EF) Abnormal points and detection methods Causes and checkpoints When the connected indoor unit exceeds the limit, a check code <7102> is Connecting more indoor units than the limit. displayed. Abnormal if connecting status does not comply with the following limit;...
Page 86 Check code Address setting error 7105 (EF) 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 speciﬁ ed in "7-4. SYSTEM CONTROL". ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Page 87 Check code Incompatible unit combination error 7130 (EF) Abnormal points and detection methods Causes and checkpoints When the connected indoor unit is not connectable with the outdoor unit, Connecting indoor unit (s) which is not authorized to the outdoor unit detects the error at start-up. connect to the outdoor unit.
Page 88 8-2. REMOTE CONTROLLER DIAGNOSIS For the detailed procedure, refer to the remote controller's manuals. 8-3. REMOTE CONTROLLER TROUBLE For the troubleshooting, refer to the remote controller's manuals. 8-4. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY) Symptom Display of remote controller CAUSE Even the cooling (heating) "Cooling (Heating)"...
Page 89 8-5. INTERNAL SWITCH FUNCTION TABLE PUMY-P60NKMU1 PUMY-P60NKMU1-BS ■ The black square ( ) indicates a switch position. Continue to the next page OCH613B...
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Page 91 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 adapter (PAC-SA88HA-E) G Max. 10m D Outdoor unit control board CN51 : 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 92 8-7. HOW TO CHECK THE PARTS PUMY-P60NKMU1 PUMY-P60NKMU1-BS Parts name Check points Thermistor (TH2) Disconnect the connector then measure the resistance with a tester. <Hic pipe> (At the ambient temperature 10 to 30:) Thermistor (TH3) Normal Abnormal <Outdoor liquid pipe>...
Page 93 Check method of DC fan motor (fan motor/outdoor multi controller circuit board) Notes · High voltage is applied to the connecter (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.) Self check...
Page 94 Check method of multi controller circuit board Multi controller circuit board check Fuse check Check the fuse on multi controller circuit board Disconnect the FAN motor connector and Replace multi controller circuit board and the Did the fuse (F500) blow? measure the resistance of connector pins.
Page 95 Check method of power circuit board Power circuit board check Note: To check the voltage of the parts on this board with a tester is difficult due to its location. Test points are limited. Is the voltage of main incoming power Check the breaker and power supply.
Page 96 Check method of M-NET power circuit board M-NET power circuit board check * To check the voltage of the parts on this board with a tester is difficult due to its location. Test points are limited. Check the voltage between M1 and M2 on the transmission terminal block TB3.
Page 97 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 k" ± 3 % B constant = 3480 ±...
Page 98 <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 99 <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 100 8-9. TEST POINT DIAGRAM Outdoor multi controller circuit board PUMY-P60NKMU1 PUMY-P60NKMU1-BS <CAUTION> TEST POINT 1 is high voltage. CN51 External signal Model selection Pump down Test run Forced defrost Model selection output CN102 Connect to the M-NET power circuit board...
Page 101 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUMY-P60NKMU1 Measure the resistance in the following points (connectors, etc.). PUMY-P60NKMU1-BS If they are short-circuited, it means that they are broken.
Page 102 M-NET power circuit board PUMY-P60NKMU1 PUMY-P60NKMU1-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 power circuit board (CNAC1) 1–3 : 208/230 V AC...
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Page 111: Electrical Wiring
ELECTRICAL WIRING This chapter provides an introduction to electrical wiring for the CITY MULTI-S 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 Use a separate power supply for the outdoor unit and indoor unit. Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
Page 112 9-2-2. Cross section area of Wire for Main Power and ON/OFF capacities PUMY-P60NKMU1 PUMY-P60NKMU1-BS Thickness of Wire for Main Power Supply and On/Off Capacities Minimum Wire Thickness Maximum rating of Breaker for Breaker for Current Minimum cir- Power Supply (AWG [mm...
Page 113 9-3. DESIGN FOR CONTROL WIRING Please note that the types and numbers of control wires needed by the CITY MULTI-S series depend on the remote controllers and whether they are linked with the system or not. 9-3-1. Selection number of control wires M-NET remote controller Remote controller used in system control operations.
Page 114 9-5. SYSTEM SWITCH SETTING In order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of the MULTI-S 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 115 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 the MULTI-S series, 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 116: 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 [ 492 ft [150 meters] Total Piping Length Permissible A+B+C+d [ 262 ft [80 meters] Farthest Piping Length Length B+C+d [ 98 ft [30 meters] Farthest Piping Length After First Branch...
Page 117 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit A+a+b+c+d [ 492 ft [150 meters] Total Piping Length Permissible A+d [ 262 ft [80 meters] Farthest Piping Length Length Farthest Piping Length After First Branch d is 100 ft [30 meters] High/Low Difference in Indoor/Outdoor Section 164 ft [50 meters] (If the outdoor unit is lower, 131 ft [40 meters])
Page 118 Note: Pipe re-branching after the header branching is not possible. Method of Combined Branching of Lines and Headers Connection Examples (Connecting to 5 Indoor Units) Outdoor unit First branching (branching joint) Branching joint Indoor unit Branching header Blind caps Total Piping Length A+B+C+a+b+c+d+e is 492 ft [150 meters] Permissible Farthest Piping Length...
Page 119 10-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 10-2-1. 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. To prevent possible injury, the rooms should be large enough to keep the R410A concentration specified by ISO 5149-1 as follows.
Page 120: Disassembly Procedure
DISASSEMBLY PROCEDURE PUMY-P60NKMU1 PUMY-P60NKMU1-BS Note: Turn OFF the power supply before disassembly. PHOTOS/FIGURES OPERATING PROCEDURE 1. Removing the service panel and top panel Top panel Top panel fixing screws Photo 1 (1) Remove 3 service panel fixing screws (5 × 12) and slide...
Page 121 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 (6) Remove 2 electrical parts box fixing screws (4 × 10) then detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left Hooks Electrical and 1 hook on the right.
Page 122 PHOTOS/FIGURES OPERATING PROCEDURE Photo 9-1 6. Removing the thermistors Thermistor <Low pressure saturated temp.> Thermistor <HIC> (TH2) and thermistor <Compressor> (TH4) (TH6) Thermistor (1) Remove the service panel. (See Photo 1) <Compressor> Thermistor (2) Disconnect the connectors, TH2 (black) and TH4 (white), (TH4) <HIC>...
Page 123 OPERATING PROCEDURE PHOTOS/FIGURES 9. Removing bypass valve coil (SV1) and bypass valve Photo 11 Thermistor (1) Remove the service panel. (See Photo 1) Low pressure <Outdoor pipe> (2) Remove the top panel. (See Photo 1) sensor (63LS) (TH3) (3) Remove the cover panel (front). (Refer to procedure 8(5)) (4) Remove the cover panel (rear) (Refer to procedure 8(6)) (5) Remove the side panel (R).
Page 124 OPERATING PROCEDURE PHOTOS/FIGURES 13. Removing the reactor (DCL) Figure 2 (1) Remove the service panel. (See Photo 1) Electrical parts box (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box (See photo 5) (4) Remove 4 screws for reactor (4 x 10) to remove the reac- tor.
Page 125 OPERATING PROCEDURE PHOTOS/FIGURES 15. Removing the accumulator Photo 15 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 5) (4) Remove the valve bed. (See procedure 8 (4)) (5) Remove the cover panel (front).
Page 126 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2016 MITSUBISHI ELECTRIC CORPORATION Issued: Feb. 2018 No.OCH613 REVISED EDITION-B Issued: Mar. 2017 No.OCH613 REVISED EDITION-A Published: May 2016 No.OCH613 Specifications are subject to change without notice. Made in Japan...

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