hit counter script
Download
Share
Print this page
Mitsubishi Electric CITY MULTI PUMY-SM112VKM Service Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Air Conditioner
  5. CITY MULTI PUMY-SM112VKM
  6. Service manual
Mitsubishi Electric CITY MULTI PUMY-SM112VKM Service Manual

Mitsubishi Electric CITY MULTI PUMY-SM112VKM Service Manual

Hide thumbs Also See for CITY MULTI PUMY-SM112VKM:

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
<Outdoor unit>
Model name
PUMY-SM112VKM PUMY-SM112VKM-ET
PUMY-SM125VKM PUMY-SM125VKM-ET
PUMY-SM140VKM PUMY-SM140VKM-ET
PUMY-SM112YKM PUMY-SM112YKM-ET
PUMY-SM125YKM PUMY-SM125YKM-ET
PUMY-SM140YKM PUMY-SM140YKM-ET
Salt proof model
PUMY-SM112VKM-BS
PUMY-SM125VKM-BS
PUMY-SM140VKM-BS
PUMY-SM112YKM-BS
PUMY-SM125YKM-BS
PUMY-SM140YKM-BS
PUMY-SM112VKM-ET-BS
PUMY-SM125VKM-ET-BS
PUMY-SM140VKM-ET-BS
PUMY-SM112YKM-ET-BS
PUMY-SM125YKM-ET-BS
PUMY-SM140YKM-ET-BS
1. SERVICE REF. ··································· 2
2. SAFETY PRECAUTION ······················· 3
3. OVERVIEW OF UNITS ························ 9
4. SPECIFICATIONS ···························· 13
5. DATA ·············································· 15
6. OUTLINES AND DIMENSIONS ··········· 28
7. WIRING DIAGRAM ··························· 29
8. TROUBLESHOOTING ······················· 31
9. DISASSEMBLY PROCEDURE ···········116
10. SYSTEM CONSTRUCTION ···············125
11. ELECTRICAL WIRING ·····················127
12. REFRIGERANT PIPING TASKS ·········128
13. REMOTE CONTROLLER ··················129
Appendix: Installation manual (Excerpt of English Ver.)
PARTS CATALOG (OCB794)
R32
April 2024
OCH794
REVISED EDITION-A
• Some descriptions have been
changed in REVISED EDITION-A.
OCH794 is void.

Advertisement

loading
Need help?

Need help?

Do you have a question about the CITY MULTI PUMY-SM112VKM and is the answer not in the manual?

Questions and answers

Related Manuals for Mitsubishi Electric CITY MULTI PUMY-SM112VKM

Summary of Contents for Mitsubishi Electric CITY MULTI PUMY-SM112VKM

  • Page 1 April 2024 OCH794 SERVICE MANUAL REVISED EDITION-A <Outdoor unit> • Some descriptions have been changed in REVISED EDITION-A. Model name OCH794 is void. PUMY-SM112VKM PUMY-SM112VKM-ET PUMY-SM125VKM PUMY-SM125VKM-ET PUMY-SM140VKM PUMY-SM140VKM-ET PUMY-SM112YKM PUMY-SM112YKM-ET PUMY-SM125YKM PUMY-SM125YKM-ET PUMY-SM140YKM PUMY-SM140YKM-ET Salt proof model PUMY-SM112VKM-BS PUMY-SM112VKM-ET-BS PUMY-SM125VKM-BS PUMY-SM125VKM-ET-BS PUMY-SM140VKM-BS...
  • Page 2 SERVICE REF. PUMY-SM112VKM.TH PUMY-SM112VKM-ET.TH PUMY-SM125VKM.TH PUMY-SM125VKM-ET.TH PUMY-SM140VKM.TH PUMY-SM140VKM-ET.TH PUMY-SM112YKM.TH PUMY-SM112YKM-ET.TH PUMY-SM125YKM.TH PUMY-SM125YKM-ET.TH PUMY-SM140YKM.TH PUMY-SM140YKM-ET.TH PUMY-SM112VKM-BS.TH PUMY-SM112VKM-ET-BS.TH PUMY-SM125VKM-BS.TH PUMY-SM125VKM-ET-BS.TH PUMY-SM140VKM-BS.TH PUMY-SM140VKM-ET-BS.TH PUMY-SM112YKM-BS.TH PUMY-SM112YKM-ET-BS.TH PUMY-SM125YKM-BS.TH PUMY-SM125YKM-ET-BS.TH PUMY-SM140YKM-BS.TH PUMY-SM140YKM-ET-BS.TH OCH794A_2...
  • Page 3 SAFETY PRECAUTION 2-1. Always observe for safety 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. • Servicing shall be performed only as recommended by the manufacturer. 2-2-1. Warning for service •...
  • Page 5 • To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water collecting in the base of the outdoor unit could cause rust. • If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up. •...
  • Page 6 Can R22 tools be Can R407C tools be Can R410a tools be Tools and materials R32 tools used ? used ? used ? Charge valve Prevent gas from blowing Tool exclusive for R32 out when detaching charge hose Vacuum pump Vacuum drying and air Tools for other refriger- ( Usable if equipped...
  • Page 7 which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being corroded. 1-9. Checks on electrical devices Repair and maintenance to electrical components shall include initial safety checks and component inspection proce- dures.
  • Page 8 Compressed air or oxygen shall not be used for purging refrigerant systems. For appliances containing flammable refrigerants, flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.
  • Page 9 OVERVIEW OF UNITS 3-1. System construction Outdoor unit Horsepower 4.5 HP 5 HP 6 HP Model name SM112 SM125 SM140 Applicable indoor unit Capacity class 15 to 140 Number of units 1 to 12 1 to 12 1 to 12 Total system capacity range 50 to 130% of outdoor unit capacity Model name...
  • Page 10 3-2. System construction (Branch box system) Outdoor unit Horsepower 4.5 HP 5 HP 6 HP Model name SM112 SM125 SM140 Applicable indoor unit Capacity class 15 to 100 Number of units 2 to 8 Total system 50 to 130% of outdoor unit 50 to 130% of outdoor unit 50 to 130% of outdoor unit capacity range...
  • Page 11 3-3. System construction (Mixed system) System only Model CITY MULTI indoor units only (Connection without Branch box) PUMY-SM112 1-12 PUMY-SM125 1-12 PUMY-SM140 1-12 Mixed system One Branch box Two Branch boxes Model 4-Branch box × 1 4-Branch box × 1 6-Branch box ×...
  • Page 12 3-4. System Specifications 3-4-1. Outdoor Unit Outdoor unit Model name SM112 SM125 SM140 Capacity Cooling (kW) 12.5 14.0 15.5 Heating (kW) 14.0 16.0 17.5 Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling Indoor: D.B. 27°C/W.B. 19°C Outdoor: D.B.
  • Page 13 Motor output 0.20 × 1 External static press. 0 Pa/30 Pa Compressor Type × Quantity Twin rotary hermetic compressor x 1 Manufacturer Mitsubishi Electric Corporation Starting method Inverter Capacity Cooling 26 to 100 24 to 100 21 to 100 control...
  • Page 14 Motor output 0.20 × 1 External static press. 0 Pa/30 Pa Compressor Type × Quantity Twin rotary hermetic compressor x 1 Manufacturer Mitsubishi Electric Corporation Starting method Inverter Capacity 26 to 100 24 to 100 21 to 100 Cooling control...
  • Page 15 DATA 5-1. Selection of indoor and outdoor units 5-1-1. Cooling Design condition Outdoor dry bulb temperature 45ºC Total cooling load 12.6 kW Room 1 Indoor dry bulb temperature 27ºC Indoor wet bulb temperature 20ºC Cooling load 4.6 kW Room 2 Indoor dry bulb temperature 24ºC Indoor wet bulb temperature...
  • Page 16 5-1-2. Heating Design condition Outdoor wet bulb temperature 2°C Total heating load 13.2 kW Room 1 Indoor dry bulb temperature 23°C Heating load 5.4 kW Room 2 Indoor dry bulb temperature 23°C Heating load 7.8 kW Other Indoor/Outdoor piping equivalent length 60 m Capacity of indoor unit P·FY series Model class of indoor unit...
  • Page 17 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 W.B Outdoor Temperature [°C DB]...
  • Page 18 5-2-2. Heating Indoor temperature [°C DB] <Figure 3> Indoor unit temperature correction Indoor Temperature 20°C DB -20.0 -15.0 -10.0 -5.0 10.0 15.0 Outdoor temperature [°C WB] Indoor Temperature 20°C D.B 15°C D.B 27°C D.B 25°C D.B Outdoor Temperature [°C W.B.] <Figure 4>...
  • Page 19 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 "5-1. Selection of indoor and outdoor units". PUMY-SM112 ■ Cooling 16.0 14.0 12.0 10.0 10.0 12.0...
  • Page 20 ■ Heating 16.0 14.0 12.0 10.0 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) 20.0 V-Type 15.0 220V 230V 10.0 240V 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) Y-Type...
  • Page 21 PUMY-SM125 ■ Cooling 18.0 16.0 14.0 12.0 10.0 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) 20.0 V-Type 220V 15.0 230V 240V 10.0 10.0 12.0 14.0 16.0 18.0 20.0...
  • Page 22 ■ Heating 18.0 16.0 14.0 12.0 10.0 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW) 20.0 V-Type 15.0 220V 230V 10.0 240V 10.0 12.0 14.0 16.0 18.0 20.0 Total capacity of indoor units(kW)
  • Page 23 PUMY-SM140 ■ Cooling 20.0 18.0 16.0 14.0 12.0 10.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 Total capacity of indoor units(kW) 10.0 12.0 14.0 16.0 18.0 20.0 22.0 Total capacity of indoor units(kW) 25.0 V-Type 20.0 220V 230V 240V 15.0 10.0 10.0 12.0...
  • Page 24 ■ Heating 20.0 18.0 16.0 14.0 12.0 10.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 Total capacity of indoor units(kW) 10.0 12.0 14.0 16.0 18.0 20.0 22.0 Total capacity of indoor units(kW) 25.0 V-Type 20.0 220V 15.0 230V 240V 10.0 10.0 12.0 14.0...
  • Page 25 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 "5-2.
  • Page 26 PUMY-SM140 Total capacity of indoor unit 1.00 0.95 11.6 0.90 15.5 20.2 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50 Piping equivalent length (m) <Figure 7> Correction of refrigerant piping length 5-5-2. Heating PUMY-SM112 PUMY-SM125 PUMY-SM140 1.00 0.95 0.90 0.85 0.80 0.75 0.70...
  • Page 27 5-6. Noise criterion curves PUMY-SM112 PUMY-SM125 SPL(dB) SPL(dB) MODE LINE MODE LINE HEATING HEATING COOLING COOLING SILENT(Cooling) SILENT(Cooling) SUPER SILENT 1(Cooling) SUPER SILENT 1(Cooling) SUPER SILENT 2(Cooling) SUPER SILENT 2(Cooling) NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF...
  • Page 28 OUTLINES AND DIMENSIONS Unit: mm OCH794A_28...
  • Page 29 WIRING DIAGRAM PUMY-SM112VKM PUMY-SM125VKM PUMY-SM140VKM LEV-A LEV-B TH7 TH6 TH3 TH4 63LS 63HS MULTI. B. is the switch position. CN3D CN3S CN3N SWU2 SWU1 CNF1 (WH) (RD) (BU) (WH) 63HS TH7/6 (WH) (RD) (WH) (WH) (BK) CNLVA CNLVB (WH) (RD) 63LS (BU) (YE)
  • Page 30 PUMY-SM112YKM PUMY-SM125YKM PUMY-SM140YKM LEV-A LEV-B TH7 TH6 TH3 TH4 63LS 63HS MULTI. B. is the switch position. CN3D CN3S CN3N SWU2 SWU1 CNF1 (WH) (RD) (BU) (WH) 63HS TH7/6 (WH) (RD) (WH) (WH) (BK) CNLVA CNLVB (WH) (RD) 63LS (BU) (YE) CN51 (WH)
  • Page 31 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 32 Error Error code Detected Unit code (4 digits) Trouble Remarks Remote Indoor Outdoor (2 digits) Controller 4220 Voltage shortage/overvoltage/PAM error/L1 open Check delay code 4320 phase/primary current sensor error/power synchroni- О zation signal error 4230 Heat sink temperature trouble О Check delay code 4330 4250 Power module trouble...
  • Page 33 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 34 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 105°C continuously for 5 minutes of refrigerant - over 110°C...
  • Page 35 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. Is the connector for outdoor multi Reconnect the connector or connect it tightly. controller circuit board or shut-off valve coils disconnected or loose? Disconnect the connector for outdoor multi...
  • Page 36 1300 (UL): Low pressure trouble Chart 1 of 3 Abnormal points and detection methods Causes and checkpoints 63L equipped model • Defective operation of stop valve (not fully open) • Low pressure (63L is in operation) • Clogged or broken pipe 63L operates (under 0.00 MPaG) during compressor •...
  • Page 37 1300 (UL): Low pressure trouble Chart 2 of 3 Diagnosis of failure Continued from the previous page (Dirty) Is there dirt on the indoor heat Wash the indoor heat exchanger. exchanger? (Not dirty) (Short-cycled) Is the outdoor unit short-cycled? Resolve the short-cycle. (Not short-cycled) (Dirty) Is there dirt on the outdoor heat...
  • Page 38 1300 (UL): Low pressure trouble Chart 3 of 3 Diagnosis of failure Continued from the previous page Check the resistance of SV1. Is the resistance detected? Replace the SV1. 63L equipped model Is the connector for outdoor multi controller circuit board 63L Reconnect the connector or connect it tightly.
  • Page 39 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) •...
  • Page 40 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 41 1302 (UE): High pressure trouble Chart 3 of 4 Diagnosis of failure Continued from the previous page. Is the resistance detected? Replace the TH7. Check the operation of shut-off valves. Do they operate normally? Replace the shut-off valves. Disconnect the indoor LEV wiring to check the resistance.
  • Page 42 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 43 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 operation, • Disconnection or loose connection of TH4 if a discharge superheat of -15°C* or less is detected for 5 •...
  • Page 44 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 45 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 46 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. Is the connector for outdoor multi controller circuit Reconnect the connector or connect it tightly.
  • Page 47 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 48 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 49 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 • Disconnection or failure of 4-way valve coil for 3 minutes or more during heating operation when the •...
  • Page 50 1521/1522 (FL/EF): Refrigerant leakage Abnormal points and detection methods Causes and checkpoints Refrigerant is leaking from the air conditioner. • Refrigerant leak from air conditioner The refrigerant sensor has detected refrigerant leak. • Refrigerant leak from piping Refrigerant is leaking in the room where the alarm is beep- •...
  • Page 51 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 52 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 53 4210 (UP): Compressor overcurrent interruption/Failure in 12 VDC power supply circuit on power circuit board 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 opera- •...
  • Page 54 4210 (UP): Compressor overcurrent interruption/Failure in 12 VDC power supply circuit on power circuit board Chart 2 of 2 Diagnosis of failure Continued from the previous page. (Short-cycled) Are those units short-cycled? Remove factor(s) causing the short-cycle. (Not short-cycled) Disconnect the compressor wiring from the outdoor Make sure to perform a voltage check with the same performing frequencies.
  • Page 55 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 56 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 57 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 58 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 59 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 60 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 61 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 62 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 63 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 or less Short: 90°C or more TH7:...
  • Page 64 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 or less Short: 90°C or more...
  • Page 65 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 • V model <Internal thermistor> • Defective outdoor multi controller circuit board Open: −35.1°C or less Short:...
  • Page 66 5201 (F5): High pressure sensor (63HS) trouble Abnormal points and detection methods Causes and checkpoints • The detected pressure in the high pressure sensor is 1 • Defective high pressure sensor kgf/cm or less during operation, the compressor stops • Decrease of internal pressure caused by gas leakage operation and enters into an anti-restart mode for 3 min- •...
  • Page 67 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 −2.3 kgf/cm or less, or 23.1 kgf/cm or more during op- •...
  • Page 68 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 69 5558 (FH): Refrigerant sensor error Abnormal points and detection methods Causes and checkpoints A refrigerant sensor has failed. • A refrigerant sensor connected to an M-IC has failed. • A Sensor and Alarm Kit connected to a branch box has failed.
  • Page 70 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 71 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 72 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 73 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 74 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 75 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 76 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 77 6607 (A7): No ACK error Chart 4 of 4 Diagnosis of failure Continued from the previous page. Apply the correct transmission line, then perform Is the correct transmission line used? the procedure 1. When operating in a single refrigerant system Is it operating different refrigerant (single indoor unit), the controller of the dis- systems?
  • Page 78 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 79 6815 (FH): Supervisor mode alarm kit communication error, MA su- pervisor remote controller communication error Abnormal points and detection methods Causes and checkpoints An communication error has occurred with a Sensor and • A wire of the MA remote controller in supervisor mode Alarm Kit in supervisor mode or with an MA remote con- connected to M-IC is incorrect or broken.
  • Page 80 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 81 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 82 6831 (E4): Sensor and Alarm Kit communication error Abnormal points and detection methods Causes and checkpoints An communication error has occurred with a refrigerant • A wire of a refrigerant sensor connected to an M-IC is sensor. incorrect or broken. •...
  • Page 83 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 84 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 85 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 86 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. Diagnosis of failure Check the model selection switch (SW4 on the indoor controller board) of the connected indoor unit.
  • Page 87 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 88 7105 (EF): Address setting error Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints The address setting is wrong. There is a unit without correct address setting in the range specified in the installation manual. Diagnosis of failure <Outdoor unit>...
  • Page 89 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 90 7118 (EF): Refrigerant leak detection system error Abnormal points and detection methods Causes and checkpoints The system construction is not appropriate, so refrigerant • A refrigerant sensor is not connected to an M-IC or leak cannot be detected at start-up. The outdoor unit de- there is an abnormality in the connection.
  • Page 91 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 92 8-2. Remote controller diagnosis Refer to “Remote controller check” in MA remote controller operation manual. 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 93 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 94 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 95 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 96 Target Pdm (kg/cm²) 29.5 31.5 SW6-7 SW6-8 Target ETm (°C) Function Operation in each switch setting Purpose Additional information When to set Change of defrosting Activated Deactivated Any time To shorten the defrosting prohibition time The performance of HEAT operation is control (For high in high humidity (or heavy snow) region, in...
  • Page 97 ■ SW9: Function switch Initial setting 2 3 4 5 6 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 98 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). Thermistors Normal Abnormal TH4 (Compressor) 160 to 410 kΩ Open or short TH2 (HIC pipe) 4.3 to 9.6 kΩ...
  • Page 99 Connector pins Normal Abnormal Red - White 46 ± 4 Ω Open or short Red - Orange Red - Yellow Red - Blue OCH794A_99...
  • Page 100 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 101 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 102 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 LED1,2 on the control board. 2 3 4 5 6 7 8 The black square (■) indicates a switch position.
  • Page 103 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 104 8-9. Test point diagram ■ Outdoor multi controller circuit board Caution: • TEST POINT 1 is high voltage. Model selection Pump down CN51 Function selection External signal Test run Manual defrost Model selection output CN102 Connect to the M-NET Function selection power circuit board (CN2) CN40,CN41 Centralized control power...
  • Page 105 ■ Outdoor power circuit board PUMY-SM112VKM PUMY-SM125VKM PUMY-SM140VKM Brief check of the 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 power module (1) Check of DIODE circuit [R]–[P1], [S]–[P1], [R]–[N1], [S]–[N1] (2) Check of IGBT circuit [P2]–[L1], [P2]–[L2], [P2]–[L3], [N2]–[L1], [N2]–[L2], [N2]–[L3]...
  • Page 106 ■ Outdoor power circuit board PUMY-SM112YKM PUMY-SM125YKM PUMY-SM140YKM Brief check of the 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 the diode module [L1]–[P1], [L2]–[P1], [L3]–[P1], [L1]–[N1], [L2]–[N1], [L3]–[N1] 2.
  • Page 107 ■ M-NET power circuit board Connect to the outdoor multi controller circuit board (CN102) – : 24–30 VDC – : 24–30 VDC Connect to the electrical parts box • Connect to the outdoor noise filter circuit board (CNAC1) (Y) • Connect to the outdoor power circuit board (CNAC1) (V) –...
  • Page 108 ■ Outdoor noise filter circuit board PUMY-SM112YKM PUMY-SM125YKM PUMY-SM140YKM LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI2-LI3/LI3-LI1: 400 VAC input LI1-NI/LI2-NI/LI3-NI: 230 VAC input (Connect to the terminal block (TB1)) Connect to the electrical parts box CNAC1 230 VAC (Connect to the M-NET power circuit board (CN1)) CNAC2...
  • Page 109 8-10. Outdoor unit information display SW: setting 0: OFF 1: ON Contents LED1, 2 setting No. 12345678 00000000 Relay output (at Compressor 21S4 Always — normal state) operation lighting Error code (at 0000–9999 (The address of the detecting source unit and the error code are alternately displayed.) abnormal state) Note: When abnormality occurs, check display.
  • Page 110 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 111 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 112 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 113 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 114 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 115 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 116 DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. : Indicates the invisible 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 117 • Thermistor <HIC pipe> (TH2) • Thermistor <Outdoor liquid pipe> (TH3) • Thermistor <Compressor> (TH4) • Thermistor <Suction pipe/Ambient> (TH6/7) • High pressure switch (63H) • High pressure sensor (63HS) • Low pressure sensor (63LS) • 4-way valve (21S4) • Bypass valve (SV1) •...
  • Page 118 Photo 5 Photo 6 Multi controller circuit Screws (B) Connector of reactor board (MULTI.B.) Reactor M-NET power board* (M-NET P.B.) Connectors of reactor Screws (A) Electrical parts box Reactor Power circuit board (P.B) Connectors of reactor Terminal Reactor block (TB3) Terminal Connector of reactor block (TB7)
  • Page 119 Photo 9 Reactor Electrical parts box Screws (B) Connectors of reactor * The M-NET power board is installed behind the multi controller circuit board. Removing thermistors ■ Removing the thermistors <Compressor> (TH4) / <HIC pipe> (TH2) 1. Remove the service panel. (See Photo 1) 2.
  • Page 120 Photo 12 Thermistor <Ambient> (TH7) Sensor holder Photo 13 Photo 14 LEV coil (LEV-A) High pressure switch (63H) LEV coil (LEV-B) Thermistor <Suction pipe> (TH6) Shut-off valves Thermistor <HIC pipe> (TH2) Thermistor <Compressor> Thermistor (TH4) <Outdoor liquid pipe> (TH3) Removing LEV coils 1.
  • Page 121 4. Remove the shut-off valve coil. (Refer to procedure 9) 5. Recover refrigerant. 6. Remove the welded part of the shut-off valve. (See Photo 15) Caution: • Recover refrigerant with the stop valves opened through both the check valves and the service ports. Notes: •...
  • Page 122 Photo 16 High pressure switch High pressure sensor Bypass valve coil (SV1) Low pressure sensor 14. Removing the high pressure switch (63H) 1. Remove the service panel. (See Photo 1) 2. Remove the top panel. (See Photo 1) 3. Remove the electrical parts box. (Refer to procedure 3) 4.
  • Page 123 Photo 17 Clamps Electrical parts box 16. Removing the compressor (MC) 1. Remove the service panel. (See Photo 1) 2. Remove the top panel. (See Photo 1) 3. Remove the electrical parts box. (Refer to procedure 3) 4. Remove the valve bed by removing the following screws: •...
  • Page 124 1. Remove the service panel. (See Photo 1) 2. Remove the top panel. (See Photo 1) 3. Remove the electrical parts box. (Refer to procedure 3) 4. Remove the valve bed. (Refer to the procedure 16-4) 5. Remove the cover panel (front). (Refer to the procedure 16-5) 6.
  • Page 125 10 SYSTEM CONSTRUCTION 10-1. Example of refrigerant piping and transmission cable wiring OCH794A_125...
  • Page 126 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 Check valve Thermistor (TH7) <High pressure> <Ambient> Service port Gas shut off valve (SV3) 4-way valve Strainer Strainer Refrigerant Gas pipe...
  • Page 127 11 ELECTRICAL WIRING Refer to installation manual “Electrical work” for details. OCH794A_127...
  • Page 128 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 If a large amount of R32 refrigerant leaks in a room, suffocation or fire may result. Satisfy the installation area specified in the installation manual to meet safety standards.
  • Page 129 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 130 Display The main display can be displayed in 2 different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) ■...
  • Page 131 Menu structure Press the [ ] button. Move the cursor to the desired item with the F1 and F2 buttons, and press the [ ] button Note: • Not all functions are available on all models of indoor units. Vane · 3D i-See · Vent. (Lossnay) Operation High power Manual vane angle...
  • Page 132 Main menu list Main menu Setting and display items Setting details Operation Vane · 3D i-See · Vent. Vane: Use to set the vertical air direction. (Vane.Vent. (Lossnay)) Louver: Use to set the horizontal air direction. 3D i-See sensor: This setting is available only for the air conditioners that support easy setting function of motion sensing air direction.
  • Page 133 Main menu Setting and display items Setting details Service Test run Select ˝Test run˝ from the Service menu to bring up the Test run menu. • Test run • Drain pump test run Input maintenance info. Select ˝Input maintenance Info.˝ from the Service menu to bring up the Maintenance information screen.
  • Page 134 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 135 *1. This button is enabled or disabled depending on the model of the indoor unit. Display Operation mode Not available Cool Appears 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 136 Error information Error information Error code 2502 Contact information Error unit 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 137 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 138 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 139 : 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 140 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 141 3. 16 error history records will appear. 4 records are shown per page, and the top record on the first page indicates the latest error record. Error history Error Unt# dd/mm/yy 2502 2502 2502 2502 Check menu: Delete Page 4. Delete the error history. •...
  • Page 142 Self check Self check M-NET address M-NET address Delete error history? Error history deleted Return: Cancel 13-7-2. PAR-SL97A-E Operating instructions CHECK 1. Press the button twice. appears, and the refrigerant address ˝00˝ blinks. CHECK Make sure that the remote controller’s display has stopped before continuing. 2.
  • Page 143 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 144 • 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 145 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 146 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN © Copyright 2023 MITSUBISHI ELECTRIC CORPORATION Issued: Apr. 2024 No. OCH794A Published: Jul. 2023 No. OCH794 Made in Japan Specifications are subject to change without notice.
  • Page 147 Air-Conditioners PUMY-SM112, SM125, SM140VKM PUMY-SM112, SM125, SM140YKM For use with R32 English INSTALLATION MANUAL FOR INSTALLER Deutsch INSTALLATIONSHANDBUCH FÜR INSTALLATEURE Français MANUEL D’INSTALLATION POUR L’INSTALLATEUR Nederlands INSTALLATIEHANDLEIDING VOOR DE INSTALLATEUR Español MANUAL DE INSTALACIÓN PARA EL INSTALADOR Italiano MANUALE DI INSTALLAZIONE PER L’INSTALLATORE Ελληνικά...
  • Page 148 Note: This symbol mark is for related countries only. This symbol mark is according to the directive 2012/19/EU Article 14 Information for users and Annex IX. Your MITSUBISHI ELECTRIC product is designed and manufactured with high quality materials and components which can be recycled and reused.
  • Page 149 1. Safety precautions • If the air conditioner is installed in a small room, measures must be taken to • After installation has been completed, check for refrigerant leaks. If refriger- prevent the refrigerant concentration in the room from exceeding the safety ant leaks into the room and comes into contact with the flame of a heater or limit in the event of refrigerant leakage.
  • Page 150 1. Safety precautions 1.2. Before installation (relocation) Caution: • Be extremely careful when transporting the units. Two or more persons are • Do not clean the air conditioner unit with water. Electric shock may result. needed to handle the unit, as it weighs 20 kg or more. Do not grasp the pack- •...
  • Page 151 2. Installation location 2.1. Refrigerant pipe Refer to Fig. 4-3, 4-4, 4-5. 2.2. Choosing the outdoor unit installation location • R32 is heavier than air—as well as other refrigerants—so tends to accumulate Correct Correct at the base (in the vicinity of the floor). If R32 accumulates around base, it may reach a flammable concentration in case room is small.
  • Page 152 2. Installation location 2.3. Outline dimensions (Outdoor unit) (Fig. 2-2) Constraints on indoor unit installation You should note that indoor units that can be connected to this outdoor unit are the following models. (mm) • Indoor units with model numbers 10-140 can be connected. When using Branch box, Indoor units with model numbers 15-100 can be connected.
  • Page 153 2. Installation location 2.4. Ventilation and service space 2.4.2. When installing multiple outdoor units Note: Leave 25 mm space or more between the units. The dimensions given along the arrows below are required to guarantee the 1 Obstacles at rear only (Fig. 2-9) air conditioner’s performance.
  • Page 154 2. Installation location 2.4.3. Windy location installation When installing the outdoor unit on a rooftop or other location unprotected from the wind, situate the air outlet of the unit so that it is not directly exposed to strong winds. Strong wind entering the air outlet may impede the normal airflow and a malfunction may result.
  • Page 155 2. Installation location 2.5. Minimum installation area ■ Indoor units Install in a room with a floor area of A or more, corresponding to refrigerant quantity m (factory-charged refrigerant + locally added refrigerant). * For the factory-charged refrigerant amount, refer to the spec nameplate or installation manual. For the amount to be added locally, refer to the installation manual.
  • Page 156 2. Installation location -2 (a) -2 (c) -1 (a) -2 (b) -2 (d) -1 (b) 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 Room area [m CITY MULTI indoor unit with refrigerant sensor or Branch box system (with the SENSOR AND ALARM KIT connection) City Multi indoor unit (without the SENSOR AND ALARM KIT connection) Rooms other than on the lowest floor of the basement...
  • Page 157 2. Installation location 2.6. Precautions for R32 system This air conditioner unit uses a mildly flammable R32 refrigerant. This system is supported by the safety standard complying with the Enhanced Tightness Refrigerant System of IEC60335-2-40. Install the unit according to the following requirements so that the system can satisfy the standards. •...
  • Page 158 2. Installation location • Be sure to install the SENSOR AND ALARM KIT for each indoor unit when the Branch box is connected in the system. When multiple indoor units are installed in a room, install the SENSOR AND ALARM KIT for each indoor unit. Refrigerant piping Branch box Transmission cable...
  • Page 159 2. Installation location <When the system requires the connection of the CITY MULTI indoor unit with refrigerant sensor> • For the CITY MULTI indoor unit with refrigerant sensor, be sure to connect the MA remote controller with alarm for each indoor unit. •...
  • Page 160 2. Installation location • Be sure to install the MA remote controller with alarm for each indoor unit when the CITY MULTI indoor unit with refrigerant sensor is connected in the system. When multiple CITY MULTI indoor units with refrigerant sensor are installed in a room, install the MA remote controller with alarm for each indoor unit. Refrigerant piping Transmission cable Indoor unit...
  • Page 161 2. Installation location 2.7. Calculation of the minimum installation area The maximum allowable refrigerant amount is calculated based on the floor area of each room where the system is connected so that the system can satisfy the safety standards. Use Fig. 2-18 to calculate the maximum allowable refrigerant amount for the smallest room where the CITY MULTI indoor unit without refrigerant sensor or the CITY MULTI indoor unit with refrigerant sensor or the Branch box system (with the SENSOR AND ALARM KIT connection) is to be installed.
  • Page 162 2. Installation location <Case 2: CITY MULTI indoor unit with refrigerant sensor or Branch box system (with the SENSOR AND ALARM KIT connection)> For rooms on the lowest floor of the basement and rooms on the other floors, calculate each maximum allowable refrigerant amount for the minimum installation area and select the smallest value.
  • Page 163 2. Installation location Case 2: CITY MULTI indoor unit with refrigerant sen- sor or Branch box system (with the SEN- SOR AND ALARM KIT connection) 1. Are indoor units installed in the rooms on the lowest floor of the basement? 2.2 m 2.
  • Page 164 2. Installation location <Case 3: Mixed system> For the mixed system, use the smallest value of each maximum allowable refrigerant amount “m ˮ obtained in Case 1 and Case 2. An indoor unit can be installed if the refrigerant amount in the system “mˮ is less than the maximum allowable refrigerant amount “m ˮ.
  • Page 165 3. Installing the outdoor unit • Be sure to install the unit in a sturdy, level surface to prevent rattling noises during (mm) operation. (Fig. 3-1) <Foundation specifications> Foundation bolt Thickness of concrete 120 mm Length of bolt 70 mm Weight-bearing capacity 320 kg •...
  • Page 166 4. Installing the refrigerant piping 4.2. Selecting pipe size Conversion formula 1/4 F ø6.35 mm 3/8 F ø9.52 mm 1/2 F ø12.7 mm 5/8 F ø15.88 mm 3/4 F ø19.05 mm 4.2.1. Pipe size A, B, C, D, E (Fig. 4-3, 4, 5) Liquid pipe Gas pipe PUMY-SM112-140...
  • Page 167 4. Installing the refrigerant piping 4.3. Pipe length and height difference 4.3.1. Connection without Branch box (Fig. 4-3) A Outdoor unit B 2 branches pipe (joint) C Indoor unit Fig. 4-3 (a) Total piping length A+B+C+D+a+b+c+d+e [ 120 m Permissible length Farthest piping length (L) L = A+B+C+D+e [ 70 m (one-way)
  • Page 168 4. Installing the refrigerant piping 4.3.2. Connection with Branch box (Fig. 4-4) • This unit has flared connections on each indoor unit and Branch box and outdoor unit sides. • Remove the valve cover of the outdoor unit, then connect the pipe. A Outdoor unit D First branch B Branch box...
  • Page 169 4. Installing the refrigerant piping 4.3.3. Mixed system (City Multi indoor units and M, S, P series indoor units via Branch box) (Fig. 4-5) 1. In case of using one Branch box A Outdoor Unit B First joint C Branch header (CMY) D Branch box E CityMulti Indoor unit F M, S, P series Indoor unit...
  • Page 170 4. Installing the refrigerant piping 4.4. Connecting pipes (Fig. 4-6) 45°± 2° • Conduct sufficient anti-condensation and insulation work to prevent water dripping from the refrigerant piping. (liquid pipe/gas pipe) • Increase insulation depending on the environment where the refrigerant piping is installed, or condensation may occur on the surface of the insulation material.
  • Page 171 4. Installing the refrigerant piping 4.5. Refrigerant piping (Fig. 4-8) Remove the service panel D (three screws) and the front piping cover A (two screws) and rear piping cover B (five screws). 1 Make sure that the stop valve is closed, and connect the Muffler and the extended pipe.
  • Page 172 4. Installing the refrigerant piping 4.7. Stop valve opening method (Fig. 4-10) • Gas side 1 Remove the cap and turn the valve rod counterclockwise as far as it will go with the use of a 5 mm hexagonal wrench. Stop turning when it hits the stopper. (ø15.88: Approximately 13 revolutions) 2 Make sure that the stop valve is open completely and rotate the cap back to its original position.
  • Page 173 4. Installing the refrigerant piping 4.8. Additional refrigerant charge Additional refrigerant charge Refrigerant for the indoor units is not included in the outdoor unit when the unit is shipped from the factory. Refrigerant of 1.4 kg equivalent to 27 m total extended piping length is already included when the outdoor unit is shipped. *1 Thus, if the total extended piping length is 27 m or less, there is no need to charge with additional refrigerant for the piping.
  • Page 174 6. Electrical work 6.1. Caution 1 Follow ordinance of your governmental organization for technical standard related 9 In case to connect with the upper class controller or to conduct group operation in to electrical equipment, wiring regulations and guidance of each electric power different refrigerant systems, the control line for transmission is required between company.
  • Page 175 6. Electrical work 6.4. System control Example of an M-NET remote controller system (Address setting is necessary.) <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.> Example for the standard operation ■...
  • Page 176 6. Electrical work Example for the operation using 2 M-NET remote controllers ■ Example of wiring Transmission cables M-IC M-IC (51) ( ) : Address (01) (02) TB15 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S (101) (151) (102)
  • Page 177 6. Electrical work Example for the group operation ■ Example of wiring transmission cables Group A M-IC(Main) M-IC(Sub) (51) ( ) : Address (01) (02) TB5 TB15 TB5 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S (101) M-NET RC Multiple CITY MULTI series indoor units operated together by 1 M-NET remote controller.
  • Page 178 6. Electrical work Example of a group operation system with 2 or more outdoor units and an M-NET remote controller. (Address settings are necessary.) ■ Examples of wiring transmission cables ( ) : Address (51) M-IC M-IC M-IC M-IC (01) (02) (05) (06)
  • Page 179 6. Electrical work ■ Permissible Lengths 1. Maximum line length via outdoor unit: L1+L2+L3+L4, L3+L4+L5+L6, L1+L2+L5+L6 { 500 m (1.25 mm² or more) 2. Indoor/outdoor transmission line Maximum length: L1, L3+L4, L2+L5, L6 { 200 m (1.25 mm² or more) 3.
  • Page 180 6. Electrical work Example of an MA remote controller system (Address setting is not necessary.) <In the case of same group operation, need to set the address that is only main CITY MULTI series indoor unit.> Example for the standard operation ■...
  • Page 181 6. Electrical work Example for the operation using 2 remote controllers ■ Example of wiring transmission cables (00) M-IC M-IC ( ) : Address (00) (00) TB15 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S MA-RC MA-RC MA-RC...
  • Page 182 6. Electrical work Example for the group operation Note: The CITY MULTI indoor unit with refrigerant sensor cannot be included in the group. ■ Example of wiring transmission cables ( ) : Address (00) M-IC M-IC (00) (00) TB15 TB15 M1 M2 S M1 M2 S M1 M2 S...
  • Page 183 6. Electrical work Example for the operation using Supervisor Remote Controller mode (Address settings are necessary.) ■ Example of wiring transmission cables (51) M-IC M-IC ( ) : Address (01) (02) TB15 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S MA-RC MA-RC...
  • Page 184 6. Electrical work Example of a group operation with 2 or more outdoor units and MA remote controllers. (Address settings are necessary.) ■ Examples of wiring transmission cables M-IC M-IC M-IC M-IC (51) (01) (02) (05) (06) TB15 TB15 TB15 TB15 M1 M2 S M1 M2 S...
  • Page 185 6. Electrical work ■ Permissible Lengths 1. Maximum line length via outdoor unit (M-NET cable): L1+L2+L3+L4, L3+L4+L5+L6, L1+L2+L5+L6 { 500 m (1.25 mm² or more) 2. Indoor/outdoor transmission line Maximum length (M-NET cable): L1 and L3+L4 and L2+L5 and L6 { 200 m (1.25 mm² or more) 3.
  • Page 186 6. Electrical work Example of a system using Branch box and A-Control indoor unit ■ Examples of wiring transmission cables 6-Branch box Controller board-1 (51) TB3A A-IC MA-RC (01) ( ) : Address M1 M2 M1 M2 TB3B A-IC MA-RC (01) (02) TB3C...
  • Page 187 6. Electrical work ■ Wiring Method Address Settings 1. Always use shielded wire when making connections between the outdoor unit (OC) and the Branch box, as well for all OC-OC and BC-BC wiring. 2. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block (TB5) of the Branch box.
  • Page 188 6. Electrical work ■ Constraint items 6-Branch box Controller board-1 TB3A A-IC MA-RC (51) (01) ( ) : Address M1 M2 M1 M2 TB3B A-IC MA-RC (01) (02) TB3C A-IC WL-RC (03) TB3A Controller board-2 A-IC MA-RC (04) (53) TB3B A-IC MA-RC (04)
  • Page 189 6. Electrical work Example of a system using Branch box, A-Control indoor unit, and CITY MULTI series indoor unit. ■ Examples of wiring transmission cables 6-Branch box Controller board-1 TB3A A-IC (51) MA-RC ( ) : Address (01) M1 M2 S M1 M2 S TB3B A-IC MA-RC...
  • Page 190 6. Electrical work ■ Example of SENSOR AND ALARM KIT Wiring 6-Branch box 4-Branch box Interconnect board Interconnect board-1 TB4A SENSOR TB4A SENSOR SIG1 SIG1 SIG1 SIG1 ALARM KIT A ALARM KIT 1-A SIG2 SIG2 SIG2 SIG2 TB4B SENSOR TB4B SENSOR SIG1 SIG1...
  • Page 191 6. Electrical work ■ Permissible Lengths 1. Maximum line length via outdoor unit (M-NET cable): L1+L2+L3+L4+L5+L6+L7 { 500 m (1.25 mm² or more) 2. Indoor/Branch box/outdoor transmission line Maximum length (M-NET cable): L1+L2+L3+L4, L5 +L6 and L7 { 200 m (1.25 mm² or more) 3.
  • Page 192 6. Electrical work 6.5. Wiring of main power supply and equipment capacity Schematic Drawing of Wiring: When Not Using a Branch box (Example) (Fig. 6-2) ■ PUMY-SM·VKM ~/N 220-230-240 V 50 Hz ~/N 220-230-240 V 50 Hz ~/N 220 V 60 Hz ~/N 220 V 60 Hz ■...
  • Page 193 6. Electrical work Cross-sectional area of Wire for Main Power Supply and On/Off Capacities <When power is supplied separately> Minimum Wire Cross-sectional area (mm Power Supply Breaker for Wiring *1 Breaker for Current Leakage Model Main Cable Ground ~/N 220-230-240 V 50 Hz SM112-140VKM 32 A 32 A 30 mA 0.1 sec.
  • Page 194 6. Electrical work <Example of “F2” calculation> Sample chart Condition PLFY-M·VEM6-E × 4 + PEFY-M·VMA(L)-A1 × 1, C = 8 (refer to right sample chart) F2 = 17.1 × 4/8 + 18.6 × 1/8 6000 = 10.875 → 16 A breaker (Tripping current = 8 × 16 A at 0.01s) *3 Current sensitivity is calculated using the following formula.
  • Page 195 6. Electrical work 6.6. Address setting Switch address setting Branch box * The 6-Branch box model is equipped with two control boards. For detailed settings, refer to the Branch box M, S, P CITY MULTI series Outdoor Installation Manual. series Indoor Address Connection Setting tens digit...
  • Page 196 6. Electrical work Ex1. Outdoor + Branch-1 <6-Branch> (M, S, P series Indoor 1-A, 1-B, 1-C, 2-A, 2-B, 2-C) + Branch-2 <4-Branch> (M, S, P series Indoor A, C) Branch box-1 <6-branch> *1 Outdoor address Branch box-1 start address + 50 = 01 + 50 = 51 Control board-1 address (01) *2 Outdoor...
  • Page 197 7. Test run 7.1. Before test run ► After completing installation and the wiring and piping of the indoor and 3. After connecting the wires to the compressor, the compressor will start to warm outdoor units, check for refrigerant leakage, looseness in the power supply up after power is supplied.
  • Page 198 8. Special functions 8.1. 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. 10 m CN51 D Outdoor unit control board L1: Error display lamp L2: Compressor operation lamp X, Y: Relay (coil rating: [ 0.9 W, 12 VDC)
  • Page 199 9. Preventive maintenance for the unit The maintenance cycle does not indicate the guarantee period. The list below is applicable under the following conditions: • The unit is used normally: it does not start and stop frequently. (The number of start/stop is 6 times or less per hour in normal use though it depends on the model.) •...
  • Page 200 EU PROHLÁŠENÍ O SHODĚ EU IZJAVA O USAGLAŠENOSTI MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. AMATA CITY CHONBURI 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000, THAILAND hereby declares under its sole responsibility that the air conditioner(s) and heat pump(s) for use in residential, commercial, and light-industrial environments described below: erklärt hiermit auf seine alleinige Verantwortung, dass die Klimaanlage(n) und Wärmepumpe(n) für das häusliche, kommerzielle und leichtindustrielle Umfeld wie unten beschrieben:...
  • Page 201 EU PROHLÁŠENÍ O SHODĚ EU IZJAVA O USAGLAŠENOSTI MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. AMATA CITY CHONBURI 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000, THAILAND hereby declares under its sole responsibility that the air conditioner(s) and heat pump(s) for use in residential, commercial, and light-industrial environments described below: erklärt hiermit auf seine alleinige Verantwortung, dass die Klimaanlage(n) und Wärmepumpe(n) für das häusliche, kommerzielle und leichtindustrielle Umfeld wie unten beschrieben:...
  • Page 202 UK DECLARATION OF CONFORMITY MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. AMATA CITY CHONBURI 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000, THAILAND hereby declares under its sole responsibility that the air conditioner(s) and heat pump(s) for use in residential, commercial, and light-industrial environments described below:...
  • Page 203 UK DECLARATION OF CONFORMITY MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. AMATA CITY CHONBURI 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000, THAILAND hereby declares under its sole responsibility that the air conditioner(s) and heat pump(s) for use in residential, commercial, and light-industrial environments described below:...
  • Page 204 <ENGLISH> <PORTUGUÊS> English is original. The other languages versions are translation of the original. O idioma original é o inglês. As versões em outros idiomas são traduções do idioma original. CAUTION CUIDADO • Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378- •...
  • Page 205 <POLSKI> <ROMÂNĂ> Językiem oryginału jest język angielski. Inne wersje językowe stanowią tłumaczenie Textul original este în limba engleză. Versiunile pentru celelalte limbi sunt traduceri oryginału. ale originalului. UWAGA ATENŢIE • Scurgerea de agent frigorific poate cauza asfixierea. Asiguraţi o ventilaţie corespunzătoare, conform •...
  • Page 206 Travellers Lane, Hatfield, Hertfordshire, AL10 8XB, England, UK Polish Branch Krakowska 48, PL-32-083 Balice, Poland MITSUBISHI ELECTRIC TURKEY ELEKTRİK ÜRÜNLERI A.Ş. Şerifali Mahallesi Kale Sokak No: 41 34775 Ümraniye, İstanbul, Turkey ООО «Мицубиси Электрик (РУС)» 115114, Российская Федерация, г. Москва, ул. Летниковская, д. 2, стр. 1, 5 этаж...
  • Page 207 Please be sure to put the contact address/telephone number on this manual before handing it to the customer. HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN BH79A694W03...

This manual is also suitable for:

City multi pumy-sm112vkm-etCity multi pumy-sm125vkmCity multi pumy-sm125vkm-etCity multi pumy-sm140vkmCity multi pumy-sm140vkm-etCity multi pumy-sm112ykm ... Show all