Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual
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Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
<Outdoor unit>
[Model Name]
[Service Ref.]
PUMY-SP112VKM.TH
PUMY-SP112VKM
PUMY-SP125VKM.TH
PUMY-SP125VKM
PUMY-SP140VKM.TH
PUMY-SP140VKM
PUMY-SP112YKM.TH
PUMY-SP112YKM
PUMY-SP125YKM.TH
PUMY-SP125YKM
PUMY-SP140YKM.TH
PUMY-SP140YKM
Salt proof model
PUMY-SP112VKM.TH-BS
PUMY-SP112VKM-BS
PUMY-SP125VKM.TH-BS
PUMY-SP125VKM-BS
PUMY-SP140VKM.TH-BS
PUMY-SP140VKM-BS
PUMY-SP112YKM.TH-BS
PUMY-SP112YKM-BS
PUMY-SP125YKM.TH-BS
PUMY-SP125YKM-BS
PUMY-SP140YKM.TH-BS
PUMY-SP140YKM-BS
OUTDOOR UNIT
PUMY-SP112VKMR1.TH
PUMY-SP125VKMR1.TH
PUMY-SP140VKMR1.TH
PUMY-SP112YKMR1.TH
PUMY-SP125YKMR1.TH
PUMY-SP140YKMR1.TH
PUMY-SP112VKMR1.TH-BS
PUMY-SP125VKMR1.TH-BS
PUMY-SP140VKMR1.TH-BS
PUMY-SP112YKMR1.TH-BS
PUMY-SP125YKMR1.TH-BS
PUMY-SP140YKMR1.TH-BS
CONTENTS
1. SAFETY PRECAUTION .................................... 2
2. OVERVIEW OF UNITS ...................................... 5
3. SPECIFICATIONS ............................................. 9
4. DATA ................................................................ 11
5. OUTLINES AND DIMENSIONS ...................... 26
6. WIRING DIAGRAM ......................................... 27
8. TROUBLESHOOTING .................................... 47
9. ELECTRICAL WIRING ................................... 124
10. REFRIGERANT PIPING TASKS .................... 130
11. DISASSEMBLY PROCEDURE ....................... 137
PARTS CATALOG (OCB668)
HFC
utilized
R410A
April 2018
No. OCH668
REVISED EDITION-B
Revision:
• Added
PUMY-SP112VKMR1.TH,
PUMY-SP125VKMR1.TH,
PUMY-SP140VKMR1.TH,
PUMY-SP112YKMR1.TH,
PUMY-SP125YKMR1.TH and
PUMY-SP140YKMR1.TH
in REVISED EDITION-B.
• Some other descriptions have
been also modified.
OCH668 REVISED EDITION-A
is void.
Note:
• This service manual describes
technical data of the outdoor
units only.

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Summary of Contents for Mitsubishi Electric City Multi PUMY-SP112VKM

  • Page 1: Table Of Contents

    utilized R410A SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS April 2018 No. OCH668 REVISED EDITION-B TECHNICAL & SERVICE MANUAL <Outdoor unit> [Model Name] [Service Ref.] Revision: • Added PUMY-SP112VKM.TH PUMY-SP112VKMR1.TH PUMY-SP112VKMR1.TH, PUMY-SP112VKM PUMY-SP125VKMR1.TH, PUMY-SP140VKMR1.TH, PUMY-SP125VKM.TH PUMY-SP125VKMR1.TH PUMY-SP125VKM PUMY-SP112YKMR1.TH, PUMY-SP125YKMR1.TH and PUMY-SP140VKM.TH PUMY-SP140VKMR1.TH PUMY-SP140VKM PUMY-SP140YKMR1.TH in REVISED EDITION-B.

  • 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. 1 Thickness of pipes Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7 mm or below.) Diagram below: Piping diameter and thickness Thickness (mm)

  • Page 5: Overview Of Units

    OVERVIEW OF UNITS 2-1. UNIT CONSTRUCTION 4.5HP Outdoor unit PUMY-SP112VKM(R1).TH(-BS) PUMY-SP125VKM(R1).TH(-BS) PUMY-SP140VKM(R1).TH(-BS) PUMY-SP112YKM(R1).TH(-BS) PUMY-SP125YKM(R1).TH(-BS) PUMY-SP140YKM(R1).TH(-BS) Applicable Capacity Type 15 to Type 140 indoor unit Number of units 1 to 9 units 1 to 10 units 1 to 12 units Total system capacity range 50 to 130% of outdoor unit cap50 to 130% of outdoor unit capacity * acity *250 to 130% of outdoor unit capacity *2 CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E Branching pipe Branch header Branch header Branch header...
  • Page 6 2-2. UNIT CONSTRUCTION (BRANCH BOX SYSTEM) 4.5HP Outdoor unit PUMY-SP112VKM(R1).TH(-BS) PUMY-SP125VKM(R1).TH(-BS) PUMY-SP140VKM(R1).TH(-BS) PUMY-SP112YKM(R1).TH(-BS) PUMY-SP125YKM(R1).TH(-BS) PUMY-SP140YKM(R1).TH(-BS) Capacity kW unit: Type 15 to Type 100 Number of units 2 to 8 units Applicable indoor unit Total system capacity 50 to 130% of outdoor unit capacity 50 to 130% of outdoor unit capacity 50 to 130% of outdoor unit capacity range (7.1 to 18.2 kW) (8.0 to 20.2 kW) (6.3 to 16.2 kW) Branch box that Number of units 1 to 2 units can be connected 4-way 1-way...
  • Page 7 2-3. UNIT CONSTRUCTION (MIXED SYSTEM) 4.5HP Outdoor unit PUMY-SP112VKM(R1).TH(-BS) PUMY-SP125VKM(R1).TH(-BS) PUMY-SP140VKM(R1).TH(-BS) PUMY-SP112YKM(R1).TH(-BS) PUMY-SP125YKM(R1).TH(-BS) PUMY-SP140YKM(R1).TH(-BS) Capacity City multi indoor unit Type 15 to Type 140 Via branch box kW unit: Type 15 to Type 100 Number Via branch box City multi indoor Via branch box City multi indoor Via branch box City multi indoor Applicable of units 1 branch box- indoor unit 2 branch boxes 7 or 8* 3 or 2*...

  • Page 8: Unit Specifications

    2-4. UNIT SPECIFICATIONS (1) Outdoor Unit PUMY-SP112VKM.TH(-BS) PUMY-SP125VKM.TH(-BS) PUMY-SP140VKM.TH(-BS) PUMY-SP112YKM.TH(-BS) PUMY-SP125YKM.TH(-BS) PUMY-SP140YKM.TH(-BS) Outdoor unit PUMY-SP112VKMR1.TH(-BS) PUMY-SP125VKMR1.TH(-BS) PUMY-SP140VKMR1.TH(-BS) PUMY-SP112YKMR1.TH(-BS) PUMY-SP125YKMR1.TH(-BS) PUMY-SP140YKMR1.TH(-BS) Cooling (kW) 12.5 14.0 15.5 Capacity Heating (kW) 14.0 16.0 16.5 Compressor (kW) Cooling capacity indicates the maximum value at operation under the following condition. *Cooling Indoor : D.B. 27°C/W.B. 19.0°C Outdoor : D.B. 35°C *Heating Indoor : D.B.

  • Page 9: Specifications

    SPECIFICATIONS Model PUMY-SP112VKM(R1).TH(-BS) PUMY-SP125VKM(R1).TH(-BS) PUMY-SP140VKM(R1).TH(-BS) Power source 1-phase 220-230-240 V, 50 Hz; 1-phase 220 V, 60 Hz 50/60 50/60 50/60 Cooling capacity 12.5 14.0 15.5 (Nominal) kcal/h 10,750 12,040 13,330 BTU/h 42,650 47,768 52,886 Power input 3.10 3.84 4.70 Current input A 14.38 13.75 13.18 17.81 17.04 16.33 21.80 20.85 19.98 kW/kW 4.03 3.65 3.30 Temp. range of cooling Indoor temp.
  • Page 10 Model PUMY-SP112YKM(R1).TH(-BS) PUMY-SP125YKM.(R1)TH(-BS) PUMY-SP140YKM(R1).TH(-BS) 3-phase380-400-415V, 50 Hz; 3-phase 380 V, 60 Hz Power source 50/60 50/60 50/60 12.5 14.0 15.5 kcal/h 10,750 12,040 13,330 Cooling capacity BTU/h 42,650 47,768 52,886 (Nominal) Power input 3.10 3.84 4.70 Current input 4.96 4.71 4.54 6.14 5.83 5.62 7.52 7.14 6.88 kW/kW 4.03 3.65 3.30 Indoor temp.

  • Page 11: Data

    DATA 4-1. SELECTION OF COOLING/HEATING UNITS <Cooling> Design Condition Outdoor Design Dry Bulb Temperature 44.7ºC Total Cooling Load 9.0 kW Room1 Indoor Design Dry Bulb Temperature 27ºC Indoor Design Wet Bulb Temperature 20ºC Cooling Load 4.0 kW Room2 24ºC Indoor Design Dry Bulb Temperature Indoor Design Wet Bulb Temperature 18ºC 4.5 kW...
  • Page 12 <Heating> Design Condition Outdoor Design Wet Bulb Temperature 2ºC Total Heating Load 10.3 kW Room1 Indoor Design Dry Bulb Temperature 21ºC 4.8 kW Heating Load Room2 Indoor Design Dry Bulb Temperature 23ºC Heating Load 5.5 kW <Other> Indoor/Outdoor Equivalent Piping Length 100 m Capacity of indoor unit Model Number...
  • Page 13 4-2. CORRECTION BY TEMPERATURE CITY MULTI could have varied capacity at different designing temperature. Using the nominal cooling capacity value and the ratio below, the capacity can be observed at various temperature. <Cooling> PUMY-SP•V(Y)KM.TH(-BS) Nominal 12.5 14.0 15.5 cooling BTU/h 42,700 47,800 52,900 capacity Input 3.10 3.84 4.70 Figure 7 Indoor unit temperature correction To be used to correct indoor unit capacity only Indoor Temperature [°CW.B.] 15.0 16.0 18.0 19.0 20.0 22.0 24.0 0.777 0.832 0.944 1.000...
  • Page 14 Figure 9 Outdoor unit temperature correction To be used to correct outdoor unit capacity only PUMY-SP112VKM.TH(-BS), PUMY-SP112YKM.TH(-BS) PUMY-SP112VKMR1.TH(-BS), PUMY-SP112YKMR1.TH(-BS) PUMY-SP125VKM.TH(-BS), PUMY-SP125YKM.TH(-BS) PUMY-SP125VKMR1.TH(-BS), PUMY-SP125YKMR1.TH(-BS) Indoor Temperature 24°C W.B 22°C W.B 20°C W.B 19°C W.B 16°C W.B 18°C W.B Outdoor Temperature [°C D.B.] PUMY-SP140VKM.TH(-BS), PUMY-SP140YKM.TH(-BS) PUMY-SP140VKMR1.TH(-BS), PUMY-SP140YKMR1.TH(-BS) Indoor Temperature 24°C W.B 22°C W.B 20°C W.B 19°C W.B...
  • Page 15 <Heating> Figure 10 Indoor unit temperature correction To be used to correct indoor unit capacity only PUMY-SP・V(Y)KM.TH(-BS) Nominal 14.0 16.0 16.5 heating BTU/h 47,768 54,592 56,298 capacity Input 3.17 3.90 4.02 Indoor Temperature [°CD.B.] Figure11 Outdoor unit temperature correction To be used to correct outdoor unit capacity only 20°C D.B -5.0 10.0 15.0 -20.0 -15.0 -10.0 Outdoor Temperature [°C W.B.] Indoor Temperature 20°C D.B...
  • Page 16 4-3. STANDARD OPERATION DATA (REFERENCE DATA) PUMY-SP112VKM.TH(-BS) PUMY-SP125VKM.TH(-BS) PUMY-SP140VKM.TH(-BS) PUMY-SP112VKMR1.TH(-BS) PUMY-SP125VKMR1.TH(-BS) PUMY-SP140VKMR1.TH(-BS) Operation PUMY-SP112YKM.TH(-BS) PUMY-SP125YKM.TH(-BS) PUMY-SP140YKM.TH(-BS) PUMY-SP112YKMR1.TH(-BS) PUMY-SP125YKMR1.TH(-BS) PUMY-SP140YKMR1.TH(-BS) 27/19°C 20°C 27/19°C 20°C 27/19°C 20°C Indoor Ambient temperature 35°C 7/6°C 35°C 7/6°C 35°C 7/6°C Outdoor No. of connected units Unit Indoor unit No.
  • Page 17 4-4. STANDARD CAPACITY DIAGRAM 4-4-1. PUMY-SP112VKM.TH(-BS) PUMY-SP112YKM.TH(-BS) <cooling> PUMY-SP112VKMR1.TH(-BS) PUMY-SP112YKMR1.TH(-BS) 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 capacity". 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...
  • Page 18 4-4-2. PUMY-SP112VKM.TH(-BS) PUMY-SP112YKM.TH(-BS) <heating> PUMY-SP112VKMR1.TH(-BS) PUMY-SP112YKMR1.TH(-BS) 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...
  • Page 19 4-4-3. PUMY-SP125VKM.TH(-BS) PUMY-SP125YKM.TH(-BS) <cooling> PUMY-SP125VKMR1.TH(-BS) PUMY-SP125YKMR1.TH(-BS) 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 capacity". 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...
  • Page 20 4-4-4. PUMY-SP125VKM.TH(-BS) PUMY-SP125YKM.TH(-BS) <heating> PUMY-SP125VKMR1.TH(-BS) PUMY-SP125YKMR1.TH(-BS) 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) Total capacity of indoor units(kW) V-Type 220V 230V 240V Total capacity of indoor units(kW) Y-Type 380V 400V 415V Total capacity of indoor units(kW) OCH668B...
  • Page 21 4-4-5. PUMY-SP140VKM.TH(-BS) PUMY-SP140YKM.TH(-BS) <cooling> PUMY-SP140VKMR1.TH(-BS) PUMY-SP140YKMR1.TH(-BS) 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". 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...
  • Page 22 4-4-6. PUMY-SP140VKM.TH(-BS) PUMY-SP140YKM.TH(-BS) <heating> PUMY-SP140VKMR1.TH(-BS) PUMY-SP140YKMR1.TH(-BS) 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...
  • Page 23 4-5. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING (1) During cooling, obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total in-use indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 6 to 8. Then multiply by the cooling capacity from Figure 4 and 5 in "4-2. CORRECTION BY TEMPERATURE" to obtain the actual capacity. (1) Capacity Correction Curve Figure 12 PUMY-SP112VKM.TH(-BS) PUMY-SP112YKM.TH(-BS) <Cooling> PUMY-SP112VKMR1.TH(-BS) PUMY-SP112YKMR1.TH(-BS) Total capacity of indoor unit 1.00 0.95 0.90 0.85 12.5 16.3 0.80 0.75 0.70 0.65 0.60 0.55 0.50...
  • Page 24 Figure 14 PUMY-SP140VKM.TH(-BS) PUMY-SP140YKM.TH(-BS) <Cooling> PUMY-SP140VKMR1.TH(-BS) PUMY-SP140YKMR1.TH(-BS) Total capacity of indoor unit 1.00 0.95 0.90 0.85 11.6 0.80 15.5 20.2 0.75 0.70 0.65 0.60 0.55 0.50 Piping equivalent length (m) Figure 15 PUMY-SP112/125/140VKM(-BS) PUMY-SP112/125/140VKMR1(-BS) <Heating> PUMY-SP112/125/140YKM(-BS) PUMY-SP112/125/140YKMR1(-BS) <Heating> 1.00 0.95 0.90 0.85 0.80...
  • Page 25 4-6. NOISE CRITERION CURVES PUMY-SP125VKM.TH(-BS) PUMY-SP112VKM.TH(-BS) SPL(dB) MODE SPL(dB) LINE MODE LINE HEATING HEATING PUMY-SP125VKMR1.TH(-BS) PUMY-SP112VKMR1.TH(-BS) COOLING COOLING PUMY-SP112YKM.TH(-BS) PUMY-SP125YKM.TH(-BS) SILENT(Cooling) SILENT(Cooling) PUMY-SP112YKMR1.TH(-BS) PUMY-SP125YKMR1.TH(-BS) 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...

  • Page 26: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS Unit: mm OCH668B...

  • Page 27: Wiring Diagram

    WIRING DIAGRAM PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS LEV-A LEV-B TH7 TH6 TH3 TH4 63LS 63HS MULTI. B. is the switch position. CN3D CN3S CN3N SWU2 SWU1 SW9 CNF1 (WH) (RD) (BU) (WH) 63HS TH7/6 (WH) (RD) (WH) (WH) (BK) CNLVA CNLVB (WH)
  • Page 28 PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS 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)

  • Page 29: Necessary Conditions For System Construction

    NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 7-1. TRANSMISSION SYSTEM SETUP OCH668B...
  • Page 30 7-2. Special Function Operation and Settings for M-NET Remote Controller (M-NET remote controller cannot be connected with a refrigerant system which includes branch box.) • It is necessary to perform “group settings” and “paired settings” at making group settings of different refrigerant systems (multiple outdoor unit).
  • Page 31 (2) Address check: Refer to section (1) regarding address entry. a) In making group settings: • Turn off the remote controller: Press the remote controller's ON/OFF button to stop operation (the indicator light will go off). • Locate the indoor unit address display mode: Press the FILTER and k buttons on the remote controller simultaneously and hold for 2 seconds. • Display indoor unit address: The entered indoor units address and type will be displayed each time the button is pressed. * When 1 entry is made, only 1 address will be displayed no matter how many times the w button is pressed. • Returning to the normal mode after completing check: Simultaneously press the FILTER and k buttons on the remote controller and hold for 2 seconds to return to the normal mode.
  • Page 32 7-3. REFRIGERANT SYSTEM DIAGRAM PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS Thermistor (TH7) Check valve <Ambient> <High pressure> Service port 4-way valve Strainer Refrigerant Gas pipe Oil separator Ball valve Low pressure High pressure sensor(63LS) sensor (63HS) Distributor Strainer...

  • Page 33: Piping Connection Size

    7-4. REFRIGERANT SYSTEM DIAGRAM (WHEN USING BRANCH BOX) Condenser / evaporator Room temperature temperature thermistor thermistor (TH1 or RT11) (TH5 or RT12) Thermistor (TH7) Check valve <Ambient> <High pressure> Service port 4-way valve Strainer Oil separator Ball valve Low pressure High pressure sensor(63LS) sensor (63HS)
  • Page 34 ■ Pipe size (Branch box-indoor unit) Indoor unit series Model number Liquid pipe Gas pipe 15–42 {6.35 {9.52 {6.35 {12.7 M series or S series {6.35 {15.88 {9.52 {15.88 35–50 {6.35 {12.7 P series 60–100 {9.52 {15.88 * If the pipe size of indoor unit is different, use a different-diameter joint. When using 35, 50 type indoor unit of P series, use the flare nut (for R410A) attached to the indoor unit. Do not use the flare nut (for R407C) in the indoor unit accessory.

  • Page 35: System Control

    7-5. SYSTEM CONTROL 7-5-1. 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. Use feed wiring to connect terminals M1 and M2 on 1. Standard operation transmission cable block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission M-IC M-IC cable block (TB5) of each M-NET control indoor unit (51) (M-IC). Use non-polarized 2-core wire.
  • Page 36 • 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 9 (SP112)/1 to 10 (SP125)/1 to 12 (SP140) 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 Prohibited items • M-NET remote controller (M-NET RC) and MA remote controller (MA RC) cannot be Longest transmission cable length used together.
  • Page 37 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 (105) (155) (101) M-NET RC M-NET RC M-NET RC M-IC M-IC (53)
  • Page 38 • Name, Symbol, and the Maximum Units for Connection • Longest length via outdoor units : L [ 500 m (1.25 mm²) • Longest transmission cable length : L [ 200 m (1.25 mm²) • M-NET Remote controller cable length : R [ 10 m (0.5 to 1.25 mm²) If the length exceeds 10 m, use a 1.25 mm² shielded wire. The length of this section (L should be included in the calculation of the maximum length and overall length. M-IC M-IC M-IC (51) M-IC (01)
  • Page 39 C. Example of a MA remote controller system (address setting is not necessary.) NOTE : In the case of same group operation, need to set the address that is only main M-NET control indoor unit. Example of wiring control cables Wiring Method and Address Setting 1. Standard operation a. Use feed wiring to connect terminals M1 and M2 on transmission cable block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the trans- mission cable block (TB5) of each M-NET control (00) indoor unit (M-IC). Use non-polarized 2-core wire.
  • Page 40 Permissible Lengths Prohibited items The MA remote controller and the Longest transmission cable length: M-NET remote controller cannot be [ 200 m (1.25 mm²) used together with the M-NET con- MA remote controller cable length: trol indoor unit of the same group. [ 200 m (0.3 to 1.25 mm²) (00) M-IC M-IC (00) (00)
  • Page 41 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 M1 M2 S MA-RC MA-RC MA-RC M-IC M-IC M-IC (53)
  • Page 42 • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L and L [ 500 m (1.25 E more) Longest transmission cable length (M-NET cable): L and L and L and L [ 200 m (1.25 E or more) MA Remote controller cable length: m1 and m1+m2+m3 and m1+m2+m3+m4 [ 200 m (0.3 to 1.25 E) (51) M-IC...

  • Page 43: Ground

    E. Example of a system using Branch Box and A-Control indoor unit TB3A TB5/TB15 Branch Box A-IC MA-RC (01) (51) TB3B TB5/TB15 M1 M2 S M1 M2 S A-IC MA-RC (02) TB3C TB5/TB15 A-IC MA-RC (03) (01) TB3D A-IC WL-RC (04) TB3E A-IC WL-RC (05) (53) TB3A Branch Box TB5/TB15 M1 M2 M1 M2 S A-IC MA-RC...

  • Page 44: Ground

    • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L [ 500 m (1.25 E or more) Longest transmission cable length (M-NET cable): L [ 200 m (1.25 E or more) Longest transmission cable length (A-Control cable): L [ 25 m (1.5 E) Remote controller cable length: m1 [ 200 m (0.3 to 1.25 E) TB3A...

  • Page 45: Ground

    F. Example of a system using Branch Box, A-Control indoor unit, and M-NET Control indoor unit. TB3A TB5/TB15 Branch Box A-IC MA-RC (01) (51) TB3B TB5/TB15 M1 M2 S M1 M2 S A-IC MA-RC (02) TB3C TB5/TB15 A-IC MA-RC (03) (01) TB3D A-IC WL-RC (04) TB3E A-IC WL-RC (05) (53) Branch Box TB3A TB5/TB15 M1 M2 S M1 M2 A-IC MA-RC...

  • Page 46: Ground

    • Name, Symbol, and the Maximum Units for Connection Longest length via outdoor unit (M-NET cable): L [ 500 m (1.25 E or more) Longest transmission cable length (M-NET cable): L and L [ 200 m (1.25 E or more) Longest transmission cable length (A-Control cable): L [ 25 m (1.5 E) Remote controller cable length: m1 [ 200 m (0.3 to 1.25 E)

  • Page 47: Troubleshooting

    TROUBLESHOOTING 8-1. CHECK POINTS FOR TEST RUN 8-1-1. Procedures before test run (1) Before 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. • Piping related : Perform leakage test of refrigerant and drain piping. Make sure that all joints are perfectly insulated. Check stop valves on both liquid and gas side for full open. • Electrical wiring related : Check ground wire, transmission cable, remote controller cable, and power supply cable for secure connection. Make sure that all switch settings of address or adjustments for special specification systems are correctly settled. (2) Safety check : With the insulation tester of 500 V, inspect the insulation resistance. Do not touch the transmission cable and remote controller cable with the tester. The resistance should be over 1.0 M". Do not proceed inspection if the resistance is under 1.0 M". Inspect between the outdoor unit power supply terminal block and ground first, metallic parts like refrigerant pipes or the electrical box next, then inspect all electrical wiring of outdoor unit, indoor unit, and all linked equipment . (3) Before operation : a) Turn the power supply switch of the outdoor unit to on for compressor protection. For a test run, wait at least 12 hours from this point.

  • Page 48: Ground

    8-1-1-2. Test run for wired remote controller <PAR-31MAA> <PAR-32MAA> 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 49: Heating

    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 Remarks code code Trouble Remote Indoor Outdoor (2 digits) (4 digits) Controller Outdoor unit outdoor multi controller circuit board 0403 Serial communication error – Power circuit board communication trouble 1102 Compressor temperature trouble Check delay code 1202 1302 High pressure trouble...

  • Page 50: Ground

    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 power circuit board ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Check the connection of the communication line (CN2 and CN4) between the outdoor multi controller circuit board and power circuit board.

  • Page 51: Ground

    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 105 [221°F] continuously for 5 minutes shortage of refrigerant ●exceeds 115 [239°F] Defective thermistor TH4: Thermistor <Compressor> Defective outdoor multi controller circuit board LEV: Linear expansion valve LEV performance failure Defective indoor controller board Clogged refrigerant system caused by foreign object Refrigerant shortage...

  • Page 52: Ground

    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. Is there a resistance detected? Replace the thermistor. Check the voltage and appearance of the outdoor multi controller circuit board. Is the voltage normal value? Replace the outdoor multi controller circuit Is it free from any trace of over- board.

  • Page 53: Ground

    Check code High pressure trouble 1302 (UE) Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints (1) High pressure abnormality (63H operation) Defective operation of stop valve (not fully open) Abnormal if 63H operates(*) during compressor operation. (* 4.15 MPaG Clogged or broken pipe [602 PSIG]) Malfunction or locked outdoor fan motor Short-cycle of outdoor unit 2) High pressure abnormality (63HS detected) Dirt of outdoor heat exchanger 1. Abnormal if a pressure detected by 63HS is 4.31 MPaG [625 PSIG] or more during compressor operation. Remote controller transmitting error caused by noise interference 2. Abnormal if a pressure detected by 63HS is 4.14 MPaG [600 PSIG] Contact failure of the outdoor multi controller circuit board connector or more for 3 minutes during compressor operation.

  • Page 54: Ground

    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 filter clogged? Clean the filter. (Clogged filter) (No clog) Is there dirt on the indoor heat Wash the indoor heat exchanger. exchanger? (dirty) (no dirt) Is the outdoor unit short-cycled? Solve the short cycle. (short-cycled) (no short-cycle) Is there dirt on the outdoor heat...

  • Page 55: Ground

    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. Disconnect the indoor LEV wiring to check the resistance. Is there a resistance detected? Replace the indoor LEV. Check the voltage and appearance of the indoor controller board. For the voltage, refer to "8-6. HOW TO CHECK THE COMPONENTS". Is the voltage normal? Replace the indoor controller board.

  • Page 56: Ground

    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. Is the connector for outdoor multi controller circuit board 63H Reconnect the connector or connect it tightly. disconnected or loose? Check the 63HS voltage.

  • Page 57: Ground

    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 −15 [−27°F](*) or Disconnection or loose connection of TH4 less for 5 minutes even though the indoor LEV has minimum open pulse Defective holder of TH4 after the compressor starts operating for 10 minutes. Disconnection of LEV coil Disconnection of LEV connector LEV : Linear expansion valve LEV performance failure TH4 : Thermistor <Compressor>...

  • Page 58: Ground

    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. Check the voltage and appearance of the indoor controller board. Is the voltage normal? Is it free from any trace of over- Replace the indoor controller board. heating or burning? Check the 63HS voltage.

  • Page 59: Cooling

    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 have been satisfied for Defective operation of stop valve (not fully open) 15 consecutive minutes: Defective thermistor 1. The compressor is operating in HEAT mode. Defective outdoor multi controller circuit board 2. Discharge superheat is 80: [144_F] or more. Indoor LEV performance failure 3. Difference between TH7 and TH3 applies to the formula of Gas leakage or shortage (TH7−TH3 < 5:[9_F]) 4. The saturation temperature converted from a high pressure sensor Defective 63HS...

  • Page 60: Ground

    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. Check the 63HS voltage. Is there a voltage(*) detected? Replace the 63HS. *For the voltage, refer to "8-6. HOW TO CHECK THE COMPONENTS". Check the voltage and appearance of the outdoor multi controller circuit board. Is the voltage normal value? Replace the outdoor multi controller circuit Is it free from any trace of over-...

  • Page 61: Ground

    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 (LEV-A)(blockage) Abnormal when both of the following temperature conditions have been satisfied for 20 minutes or more during cooling operation. 1. TH22j−TH21j ] −2°C [−3.6_F] 2. TH23j−TH21j ] −2°C [−3.6_F] TH21: Indoor intake temperature thermistor (RT11 or TH1) TH22: Indoor liquid pipe temperature thermistor (RT13 or TH2) Note: TH23: Indoor gas pipe temperature thermistor (TH-A to E) For indoor unit, the abnormality is detected if an operating unit satisfies the LEV: Linear expansion valve...

  • Page 62: Ground

    Check code Freeze protection of branch box or indoor unit 1503 (P6) Abnormal points and detection methods Causes and checkpoints The purpose of the check code is to prevent indoor unit from freezing or Wrong piping connection between indoor unit and dew condensation which is caused when a refrigerant keeps flowing into branch box the unit in STOP. Miswiring between indoor unit and branch box Miswiring of LEV in branch box or indoor unit Abnormal when all of the following conditions are satisfied: Malfunction of LEV in branch box or indoor unit 1. The compressor is operating in COOL mode. 2. 15 minutes have passed after the startup of the compressor, or the change in the number of operating indoor units is made (including a change by turning thermo-ON/OFF). 3. After the condition 2 above is satisfied, the thermistor of indoor unit in STOP detects TH22j [ −5 [23°F] for 5 consecutive minutes. ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Check the port which the piping and wiring between the indoor unit and Connect the piping and wiring to the same branch box is connected.

  • Page 63: Ground

    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 satisfied for Clogged drain pipe 3 min. or more during heating operation Disconnection or loose connection of connectors 1. TH22j−TH21j [ −10°C [−18°F] Malfunction of input circuit on outdoor multi controller circuit board 2. TH23j−TH21j [ −10°C [−18°F] 3. TH22j [ 3: [37.4°F] Defective outdoor power circuit board 4. TH23j [ 3: [37.4°F] TH21: Indoor intake temperature thermistor (RT11 or TH1) Note: TH22: Indoor liquid pipe temperature thermistor (RT13 or TH2) For indoor unit, the abnormality is detected if an operating unit satisfies the TH23: Indoor gas pipe temperature thermistor (TH-A to E) condition.

  • Page 64: Ground

    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 Model selection error on indoor controller board or outdoor multi controller circuit board Defective compressor Defective outdoor power circuit board ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Check the stop valve.

  • Page 65: Ground

    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. Check whether the compressor is faulty grounded or not. Replace the outdoor power circuit board Is the compressor faulty grounded? (Defective outdoor power circuit board). Replace the compressor (Defective compressor). OCH668B...

  • Page 66: Ground

    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 Model selection error on indoor controller board or outdoor multi controller circuit board Defective compressor Defective outdoor power circuit board Defective outdoor multi controller circuit board Malfunction of indoor/outdoor unit fan Short-cycle of indoor/outdoor unit ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

  • Page 67: Ground

    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 W phase) properly, then turn the power Are they connected properly? back ON. Check the operation of indoor/outdoor fan motors. Does it operate normally? Check the DC fan motor. Check for indoor/outdoor short-cycle. Are those units short-cycled? Remove factor(s) causing the short-cycle. (short-cycled) (no short-cycled) Disconnect the compressor wiring from the outdoor...

  • Page 68: Ground

    Check code Voltage shortage/overvoltage/PAM error/L1open phase/primary 4220 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; Decrease/increase of power supply voltage LI open-phase (Y model only) ●Decrease of DC bus voltage to 200 V (V model), 350 V (Y model) Primary current sensor failure ●Increase of DC bus voltage to 430 V (V model), 760 V (Y model) Disconnection of compressor wiring ●DC bus voltage stays at 310 V or less for consecutive 30 seconds when the operational frequency is over 20 Hz. Malfunction of 52C 6 Defective outdoor power circuit board ●When any one of the following conditions has been satisfied while the 7 Disconnection of CN5 (Y model only) detection value of primary current is 0.1 A or less.

  • Page 69: Ground

    Check code Voltage shortage/overvoltage/PAM error/L1open phase/primary 4220 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 Is the outdoor unit Replace the outdoor power circuit board V model V model or Y model? (Defective outdoor power circuit board). Y model Is CN5 connected properly Correct the CN5 wiring. without any contact failure? Is there any breakage of ACCT Replace the noise filter circuit board.

  • Page 70: Ground

    Check code Heat sink temperature trouble 4230 (U5) Abnormal points and detection methods Causes and checkpoints Abnormal if TH8 detects a temperature outside the specified range during Blocked outdoor fan compressor operation. Malfunction of outdoor fan motor Blocked airflow path Thermistor <Heat sink> TH8: Rise of ambient temperature Characteristic defect of thermistor Malfunction of input circuit on outdoor power circuit board Malfunction of outdoor fan driving circuit ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

  • Page 71: Ground

    Check code Power module trouble or Overcurrent trouble 4250 (U6) Abnormal points and detection methods Causes and checkpoints Abnormal if both of the following conditions have been satisfied: Short-circuit caused by looseness or disconnection of compressor wiring 1. Overcurrent of DC bus or compressor is detected during compressor operation. Defective compressor 2. Inverter power module is determined to be defected. Defective outdoor power circuit board ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Turn the power OFF to check for looseness or disconnection of the compressor wiring. Connect the compressor wiring (U, V and Are they connected properly? W phase) properly, then turn the power back ON. 1 Disconnect the compressor wiring (U-V-W phase). 2 Turn ON the SW7-1(*) on the outdoor multi controller circuit board.

  • Page 72: Ground

    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 specified range during fan motor operation. Disconnection of CNF connector Defective outdoor multi controller circuit board ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Check the fuse on the outdoor multi controller circuit board.

  • Page 73: Ground

    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 the defrosting operation.) Open: 3 [37_F] or less Short: 217 [423_F] or more TH4: Thermistor <Compressor> ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting The black square (■) indicates a switch position. any connectors, or replacing boards. Diagnosis Remedy Check the wiring and connector connection of TH4.

  • Page 74: Ground

    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 returning from the defrosting operation.) Open: −40 [−40°F] or less Short: 90 [162°F] or more TH6: Thermistor <Suction pipe> ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting The black square (■) indicates a switch position.

  • Page 75: Ground

    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 returning from the defrosting operation.) Open:−40 [−40°F] or less Short: 90 [162°F] or more TH3: Thermistor <Outdoor liquid pipe> ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting The black square (■) indicates a switch position.

  • Page 76: Ground

    Check code Ambient temperature 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 [−40°F] or less Characteristic defect of thermistor Short: 90 [162°F] or more TH7: Thermistor <Ambient> Defective outdoor multi controller circuit board ●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 Check the wiring and connector connection of TH7.

  • Page 77: Ground

    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 [−40°F] or less Characteristic defect of thermistor Short: 90 [162°F] or more TH2: Thermistor <HIC pipe> Defective outdoor multi controller circuit board ●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 Check the wiring and connector connection of TH2.

  • Page 78: Ground

    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: −34.8 [−30.6°F] or less Characteristic defect of thermistor Short: 102 [215.6°F] or more Defective outdoor multi controller circuit board TH8: Thermistor <Heat sink> ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

  • Page 79: Ground

    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 1kgf/F 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. leakage When the detected pressure is 1kgf/F or less immediately before Disconnection or contact failure of connector restarting, the compressor falls into an abnormal stop with a check code Malfunction of input circuit on outdoor multi controller <5201>. circuit board For 3 minutes after compressor restarting, during defrosting operation, and for 3 minutes after returning from defrosting operation, above mentioned symptoms are not determined as abnormal.

  • Page 80: Ground

    Check code Low pressure sensor (63LS) trouble 5202 (F3) Abnormal points and detection methods Causes and checkpoints When the detected pressure in the Low pressure sensor is −2.3kgf/F Defective Low pressure sensor or less, or 23.1kgf/F or more during operation, the compressor stops Decrease of internal pressure caused by gas operation with a check code <5202>. leakage For 3 minutes after compressor restarting, during defrosting operation, Disconnection or contact failure of connector and for 3 minutes after returning from defrosting operation, above Malfunction of input circuit on outdoor multi controller mentioned symptoms are not determined as abnormal. circuit board ●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 63LS: Low pressure sensor Check the wiring and connector connection.

  • Page 81: Ground

    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 10 consecutive- One-time detection board second detection Wiring through current sensor (penetration type) is 34 A 38 A not done. 2 Secondary current sensor detects 25 A or more. 3 Secondary current sensor detects 1.0 A or less. ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

  • Page 82: Ground

    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 Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Search for a unit with the same address as the source of abnormality. Is there any unit with the same Correct the address, and turn the power address?

  • Page 83: Ground

    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 processor Noise interference on indoor/outdoor connectors ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

  • Page 84: Ground

    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. the transmission line. The transmission processor is unable to transmit due Abnormal if a status, that data is not allowed on the transmission line to an increase of transmission data amount caused...

  • Page 85: Ground

    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. ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy 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. Replace the controller. Does it operate normally? (Defect of error source controller).

  • Page 86: Ground

    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. The continuity status. sending side searches the error in 30 seconds interval for 6 times Decline of transmission voltage/signal caused by continuously.

  • Page 87: Ground

    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 transmitting signal from the indoor unit to the Fresh Master. to the remote controller while the outdoor unit with the same refrigerant system as the Fresh Master is turned OFF, or within 2 minutes after it turned back...

  • Page 88: Ground

    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. There is no abnormality on the AC unit. Is the abnormality reproduced? It might be caused by an external noise, so check the transmission line to remove the factor(s). Check the address switch on the source of abnormality.

  • Page 89: Ground

    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. line used? When operating in a single refrigerant Is it operating in multi refrigerant system (single indoor unit), the controller of system? the displayed address/attribute is defective. When operating in a multi refrigerant system (2 or more outdoor units), check if any of the indoor unit stores non-existing address information.

  • Page 90: Ground

    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 91: Ground

    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" address. controllers or indoor units, or a wiring thickness does When the sub remote controller cannot receive signal. not meet the conditions specified in the chapter When the indoor controller board cannot receive signal from remote "Electrical Work" in the indoor unit Installation controller or another indoor unit. Manual.) When the indoor controller board cannot receive signal.

  • Page 92: Ground

    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". Connect the wiring properly as specified in Is the wiring connected the chapter "Electrical Work" in the indoor properly, meeting the condition? unit Installation Manual. No abnormality It might be caused by an external noise, so check the transmission line to remove the factor(s).
  • Page 93 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 94 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". Connect the wiring properly as specified in Is the wiring connected the chapter "Electrical Work" in the indoor properly, meeting the condition? unit Installation Manual. No abnormality It might be caused by an external noise, so check the transmission line to remove the factor(s).
  • Page 95 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 specified The total capacity of connected indoor units capacity (130% of the outdoor unit capacity), a check code <7100> is exceeds the specified capacity. displayed. · SP112 model: up to code 35 · SP125 model: up to code 41 · SP140 model: up to code 47 The model name code of the outdoor unit is registered wrongly. ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Check the total capacity of connected indoor units. Correct it so that the total capacity of Is the total under 130% of outdoor connected indoor units is under 130% of unit capacity? the outdoor unit capacity.
  • Page 96 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: · SP112 to SP140 model: P15 to P140 model (code 3 to 28) ·...
  • Page 97 Check code Connecting excessive number of units 7102 and branch boxes (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 and branch boxes than displayed. the limit. Abnormal if connecting status does not comply with the following limit; 1 Connectable up to 12 indoor units 2 Connect at least 1 indoor unit (Abnormal if connected none). 3 Connectable up to 2 branch boxes ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Check whether the connecting unit exceeds the limit or not. Connect less number of units than the Does it exceed the limit? limit.

  • Page 98: Address Setting Error

    Check code Address setting error 7105 (EF) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints The address setting of connected unit is wrong. There is a unit without correct address setting in the range specified in "7-5. SYSTEM CONTROL". ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy <Outdoor unit> Check whether the outdoor unit address is set in 000, or in the range of 51 to 100. Set the address properly, then turn the power OFF of indoor/outdoor unit, Fresh Is the address setting correct?
  • Page 99 Check code Address setting error 7105 (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 <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 Is the address setting correct? simultaneously for 2 minutes or more, and turn the power back ON.
  • Page 100 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 startup. connect to the outdoor unit. ●Diagnosis of defectives Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Refer to the service manual of the outdoor unit or the connected indoor unit for the authorized combination.
  • Page 101 8-2. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY) Symptom Display of remote controller CAUSE "Cooling (Heating)" blinks The indoor unit cannot cool (heat) if other indoor units are heating Even the cooling (heating) operation selection button (Cooling). is pressed, the indoor unit cannot be operated.
  • Page 102 8-3. INTERNAL SWITCH FUNCTION TABLE PUMY-SP112VKMR1.TH PUMY-SP125VKMR1.TH PUMY-SP140VKMR1.TH PUMY-SP112YKMR1.TH PUMY-SP125YKMR1.TH PUMY-SP140YKMR1.TH PUMY-SP112VKMR1.TH-BS PUMY-SP125VKMR1.TH-BS PUMY-SP140VKMR1.TH-BS PUMY-SP112YKMR1.TH-BS PUMY-SP125YKMR1.TH-BS PUMY-SP140YKMR1.TH-BS The black square (■) indicates a switch position. OCH668B...
  • Page 103 ■ The black square ( ) indicates a switch position. OCH668B...
  • Page 104 OCH668B...
  • Page 105 8-4. 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 CN51 D Outdoor unit control board : Error display lamp : Compressor operation lamp X, Y: Relay (Coil standard of 0.9W or less for 12 V DC) X, Y: Relay (1 mA DC) Auto change over (CN3N)
  • Page 106 8-5. HOW TO CHECK THE PARTS PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-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°C) Thermistor (TH3) Normal Abnormal...
  • Page 107 Check method of DC fan motor (fan motor/outdoor multi controller circuit board) Notes · High voltage is applied to the connecter (CNF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor multi controller circuit Self check...
  • Page 108 8-6. 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 ± 2 % =15exp{3480( – 273+t 15 k" 4.3 k" 10: 9.6 k" 3.0 k" 6.3 k" −20 −10 0 10 20 30 40 50 5.2 k"...

  • Page 109: High Pressure Sensor

    <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 110: Low Pressure Sensor

    <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 111 8-7. TEST POINT DIAGRAM Outdoor multi controller circuit board PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS <CAUTION> TEST POINT 1 is high voltage. CN51 External signal Model selection Pump down Test run Manual defrost Model selection output CN102 Connect to the M-NET power circuit board...
  • Page 112 Outdoor power circuit board PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. Connect to the outdoor controller circuit 1. Check of POWER MODULE 1 Check of DIODE circuit board (CN2)
  • Page 113 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUMY-SP112YKM(R1).TH Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. PUMY-SP125YKM(R1).TH 1. Check of DIODE MODULE PUMY-SP140YKM(R1).TH L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 PUMY-SP112YKM(R1).TH-BS...
  • Page 114 M-NET power circuit board PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS Connect to the outdoor multi controller circuit board (CN102) 1–2: 24–30 V DC 3–4: 24–30 V DC Connect to the electrical parts box • Connect to the outdoor noise filter circuit board (CNAC1) (Y) • Connect to the outdoor power circuit board (CNAC1) (V)
  • Page 115 Outdoor noise filter circuit board PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI2-LI3/LI3-LI1: 400 V AC input LI1-NI/LI2-NI/LI3-NI: 230 V AC input (Connect to the terminal block (TB1)) Connect to the elec- trical parts box CNAC1, CNAC2 230 V AC (Connect to the outdoor controller circuit board (CNAC)) CNCT Connect to the ACL4 Primary current...
  • Page 116 8-8. OUTDOOR UNIT INFORMATION DISPLAY SW:setting 0..OFF 1..ON OCH668B...
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  • Page 124: 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. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops. Make sure the power-supply voltage does not drop more than 10 %.
  • Page 125 <When power is supplied separately> PUMY-SP•VKM series ～ /N 220-230-240V, 50 Hz ～ /N 220-230-240V, 50 Hz ～ /N 220 V, 60 Hz ～ /N 220 V, 60 Hz S1/S2/S3 S1/S2/S3 PUMY-SP•YKM series S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 Grounded 3N～380-400-415V, 50Hz L1/L2/L3/N 3N～380 V, 60 Hz A Switch (Breakers for Wiring and Current Leakage) B Outdoor Unit C Branch Box...
  • Page 126 9-2-2. Cross section area of Wire for Main Power and ON/OFF capacities PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS <Outdoor unit> <When power is supplied to outdoor unit and branch box separately> Minimum Wire Cross-sectional area (mm²) Power Supply Breaker for Wiring * Breaker for Current Leakage Model Main Cable Branch Ground ~/N 220-230-240V, 50 Hz SP112–140V – 32 A 32 A 30 mA 0.1 seconds or less ~/N 220 V, 60 Hz...

  • Page 127: Wiring Transmission Cables

    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. • Group operation involving different refrigerant systems. • Linked operation with upper control system. Remote controller → indoor unit Wires connecting → indoor units 2-core wire (non-polar) Wires connecting → indoor units with outdoor unit Wires connecting → outdoor units 9-4. WIRING TRANSMISSION CABLES 9-4-1. Types of control cables 1. Wiring transmission cables • Types of transmission cables: Shielding wire CVVS, CPEVS, or MVVS • Cable diameter: More than 1.25 mm • Maximum wiring length: Within 200 m 2. M-NET Remote control cables Kind of remote control cable Shielding wire (2-core) CVVS, CPEVS, or MVVS Cable diameter...
  • Page 128 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. Please consult the installation manual that comes with each unit for detailed information on setting procedures.
  • Page 129 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. 9-7-1. Obtaining the electrical characteristics of a CITY MULTI-S series system (1) Procedure for obtaining total power consumption Page numbers in this technical manual Power consumption...

  • Page 130: 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 Total Piping Length A+B+C+a+b+c+d [ 120 m Permissible Farthest Piping Length A+B+C+d [ 70 m Length Farthest Piping Length After First Branch B+C+d [ 50 m High/Low Difference in Indoor/Outdoor Section 50 meters or less (If the outdoor unit is lower, 30 meters or less)
  • Page 131 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit Total Piping Length A+a+b+c+d [ 120 m Permissible Farthest Piping Length A+d [ 70 m Length Farthest Piping Length After First Branch d is 50 meters or less Permissible High/ High/Low Difference in Indoor/Outdoor Section 50 meters or less (If the outdoor unit is lower, 30 meters or less)
  • Page 132 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 120 meters or less Permissible Farthest Piping Length...
  • Page 133 10-2. REFRIGERANT PIPING SYSTEM (WHEN USING BRANCH BOX) AOutdoor unit BBranching joint CBranch box Branch box Method DIndoor unit Connection Examples (Connecting to 8 Indoor Units) Total piping length A + B + C + a + b + c + d + e + f + g + h ≦ 120 m A + C + h ≦...
  • Page 134 A Outdoor Unit B First joint C Branch header (CMY) D Branch box E CityMulti Indoor unit F M/S/P series Indoor unit Mixed Method Connection Examples (Connecting to 1 Branch box) Total piping length A+B+C+D+E+a+b+c+d+e+f+g+h+i+j ≦120 m Farthest piping length (L1) A+E+a or A+B+C+e ≦...
  • Page 135 A Outdoor Unit B First joint C Branch header (CMY) D Branch box E CityMulti Indoor unit F M/S/P series Indoor unit Mixed Method Connection Examples (Connecting to 2 Branch boxes) Total piping length A+B+C+D+E+a+b+c+d+e+f+g+h+i+j+k ≦120 m Farthest piping length (L1) A+E+a ≦...

  • Page 136: Precautions Against Refrigerant Leakage

    10-3. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 10-3-1. 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. Outdoor unit Direction Maximum concentration of refrigerant flow Maximum refrigerant concentration of R410A of a room Branch box is 0.44kg/K accordance with ISO 5149-1. To facilitate calculation, the maximum concentration is expressed in units of kg/K ( kg of R410A per K) Maximum concentration of R410A: 0.44 Indoor unit (ISO 5149-1) All refrigerant of this system will leak out to this room if there is leakage at this indoor unit. 10-3-2.

  • Page 137: 11 Disassembly Procedure

    11 DISASSEMBLY PROCEDURE PUMY-SP112VKM(R1).TH PUMY-SP125VKM(R1).TH PUMY-SP140VKM(R1).TH PUMY-SP112YKM(R1).TH PUMY-SP125YKM(R1).TH PUMY-SP140YKM(R1).TH PUMY-SP112VKM(R1).TH-BS PUMY-SP125VKM(R1).TH-BS PUMY-SP140VKM(R1).TH-BS PUMY-SP112YKM(R1).TH-BS PUMY-SP125YKM(R1).TH-BS PUMY-SP140YKM(R1).TH-BS OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and the top panel Photo 1 Top panel fixing screws Top panel (1) Remove 3 service panel fixing screws (5 × 12), and slide the hook on the right downward to remove the Service service panel. panel Slide (2) Remove screws (2 for front, 3 for rear/5 × 12) of the top panel and remove it. Service panel fixing screws...
  • Page 138 OPERATING PROCEDURE PHOTOS/FIGURES 4. Disassembling the electrical parts box (VKM type) Multi controller circuit Photo 5 M-NET power board* board (MULTI.B.) (M-NET P.B.) (1) Disconnect all the connectors on the multi controller circuit board. (2) Remove 2 screws 1 which fix the plate holding the multi controller circuit board and the electrical parts box. (See Photo 5) (3) Remove the multi controller circuit board. (See Photo 5) Electrical (4) Disconnect the M-NET power board connector on the parts box...
  • Page 139 OPERATING PROCEDURE PHOTOS/FIGURES Photo 10 6.Removing the thermistor <HIC> (TH2) and the thermistor <Compressor> (TH4) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) D isconnect the following connectors on the controller circuit board in the electrical parts box. • TH2: Black • TH4:White [Removing the thermistor <HIC> (TH2)] (4) Loosen the fastener fixing the connector to the electrical parts box. (See Photo 10) (5) Pull out the thermistor <HIC> (TH2) from the sensor holder. (See Photo 13) [Removing the thermistor <Compressor> (TH4)] Fastener (4) Loosen the fastener fixing the connector to the...
  • Page 140 OPERATING PROCEDURE PHOTOS/FIGURES Photo 12 Thermistor <Ambient> (TH7) 8. Removing LEV coil [LEV-A] (1) Remove the service panel. (See Photo 1) (2) Disconnect the connector CNL VA (WH) on the multi controller circuit board in the electrical parts box. (3) Remove the LEV coil by sliding the coil upward. (See Photo 13) [LEV-B] (1) Remove the service panel. (See Photo 1) (2) Disconnect the connector CNL VB (RD) on the multi Sensor holder controller circuit board in the electrical parts box. Photo 13 (3) Remove the LEV coil by sliding the coil upward. (See Photo 13) Thermistor 9. Removing LEV LEV coil <Suction>...
  • Page 141 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the 4-way valve coil (21S4) Photo 15 (1) Remove the service panel. (See Photo 1) 4-way valve coil (21S4) 4-way valve [Removing the 4-way valve coil] (2) Remove 4-way valve coil fixing screw (M5 × 7). (3) Remove the 4-way valve coil by sliding the coil toward you. (4) Disconnect the connector 21S4 (green) on the outdoor multi controller circuit board in the electrical parts box. 11. Removing the 4-way valve (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 3 valve bed fixing screws (5 × 12) and 4 stop valve fixing screws (5 × 16) and then remove the valve...
  • Page 142 OPERATING PROCEDURE PHOTOS/FIGURES 12. Removing the solenoid valve coil (SV1) and the solenoid valve Photo 16 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector SV1 (Gray) on the multi High pressure controller circuit board in the electrical parts box. sensor (4) Remove the electrical parts box. (Refer to procedure 3) High pressure (5) Remove the solenoid valve coil fixing screw (M4 ×6). switch Low pressure (6) Remove the solenoid valve coil by sliding the coil sensor upward.
  • Page 143 OPERATING PROCEDURE PHOTOS/FIGURES 15. Removing the compressor (MC) Photo 18 (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: • Valve bed fixing screws (5 × 12): 3 pieces • Stop valve fixing screws (5 × 16): 4 pieces (5) Remove 2 cover panel (front) fixing screws (5 × 12) to remove the cover panel (front). (6) Remove 5 cover panel (rear) fixing screws (5 × 12) to remove the cover panel (rear). (7) Remove 2 side panel (R) fixing screws in the rear of the panel (5 × 12) and remove the side panel (R). (8) Remove the comp felt (top) and (body). (9) Remove the nut on the terminal cover to remove the terminal cover, and remove the compressor lead wire. (See Photo18) (10) Remove the thermistor <Compressor> (TH4). (11) Recover refrigerant. (12) Remove the welded pipe of compressor inlet and outlet. (13) Remove 3 compressor fixing nuts. Note 1: Recover refrigerant without spreading it in the air.
  • Page 144 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued:Apr.2018 No. OCH668 REVISED EDITION-B Issued:Dec.2017 No. OCH668 REVISED EDITION-A Published: Sep. 2017 No.OCH668 Specifications are subject to change without notice. Made in Japan...

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