Mitsubishi Electric PUD-SWM60VAA Service Manual
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Mitsubishi Electric PUD-SWM60VAA Service Manual

Air to water heat pump units
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AIR TO WATER HEAT PUMP UNITS
SERVICE MANUAL
[Model Name]
PUD-SWM60VAA
PUD-SWM80VAA
PUD-SWM100VAA
PUD-SWM120VAA
PUD-SWM80YAA
PUD-SWM100YAA
PUD-SWM120YAA
PUD-SHWM60VAA
PUD-SHWM80VAA
PUD-SHWM100VAA
PUD-SHWM120VAA
PUD-SHWM140VAA
PUD-SHWM80YAA
PUD-SHWM100YAA
PUD-SHWM120YAA
PUD-SHWM140YAA
OUTDOOR UNIT
R32
[Service Ref.]
PUD-SWM60VAAR1
PUD-SWM80VAAR1
PUD-SWM100VAAR1
PUD-SWM120VAAR1
PUD-SWM80YAAR1
PUD-SWM100YAAR1
PUD-SWM120YAAR1
PUD-SHWM60VAAR1
PUD-SHWM80VAAR1
PUD-SHWM100VAAR1
PUD-SHWM120VAAR1
PUD-SHWM140VAAR1
PUD-SHWM80YAAR1
PUD-SHWM100YAAR1
PUD-SHWM120YAAR1
PUD-SHWM140YAAR1
Note:
• This manual describes
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ······························· 3
3. SPECIFICATIONS ······································ 11
4. DATA ··························································· 13
5. OUTLINES AND DIMENSIONS·················· 15
6. WIRING DIAGRAM ····································· 16
7. WIRING SPECIFICATIONS ························ 19
8. REFRIGERANT SYSTEM DIAGRAM ········ 20
9. TROUBLESHOOTING ································ 22
BY THE REMOTE CONTROLLER ············· 65
11. DISASSEMBLY PROCEDURE ··················· 70
PARTS CATALOG (OCB756)
January 2021
No. OCH756
service data of the outdoor
units only.

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Summary of Contents for Mitsubishi Electric PUD-SWM60VAA

  • Page 1: Table Of Contents

    AIR TO WATER HEAT PUMP UNITS January 2021 No. OCH756 SERVICE MANUAL [Model Name] [Service Ref.] Note: • This manual describes service data of the outdoor PUD-SWM60VAAR1 PUD-SWM60VAA units only. PUD-SWM80VAAR1 PUD-SWM80VAA PUD-SWM100VAAR1 PUD-SWM100VAA PUD-SWM120VAAR1 PUD-SWM120VAA PUD-SWM80YAAR1 PUD-SWM80YAA PUD-SWM100YAAR1 PUD-SWM100YAA...

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM Service Model name Service ref. manual No. EHST17D-VM2D EHST17D-VM2D.UK ERST17D-VM2D ERST17D-VM2D.UK EHST20D-VM2D EHST20D-VM2D.UK EHST20D-VM6D EHST20D-VM6D.UK EHST20D-YM9D EHST20D-YM9D.UK EHST20D-MED EHST20D-MED.UK ERST20D-VM2D ERST20D-VM2D.UK OCH714 EHST20D-YM9ED EHST20D-YM9ED.UK OCB714 EHST20D-TM9D EHST20D-TM9D.UK EHST30D-VM6ED EHST30D-VM6ED.UK EHST30D-YM9ED EHST30D-YM9ED.UK...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. Preparation before the repair service. • Prepare the proper tools. • Prepare the proper protectors. • Provide adequate ventilation. • After stopping the operation of the heat pump units, turn off the power-supply breaker. •...
  • Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 5 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 7 b ) Isolate system electrically. c ) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; • the recovery process is supervised at all times by a competent person; •...
  • Page 8 2-3. PRECAUTIONS WHEN REUSING EXISTING R22/R410A REFRIGERANT PIPES (1) Flowchart • Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter drier. • If the diameter of the existing pipes is different from the specified diameter, refer to technical data materials to confirm if the pipes can be used.
  • Page 9 3 Tools for R32 (The following table shows whether conventional tools can be used or not.) Can R22 tools be Can R407C tools Can R410A tools Tools and materials Use R32 tools used? be used? be used? Gauge manifold Tool exclusive for R32 Air purge, refrigerant charge and operation check Charge hose...
  • Page 10 2-5. Minimum installation area If you unavoidably install a unit in a space where all four sides are blocked or there are depressions, confirm that one of these situations (A, B or C) is satisfied. Note: These countermeasures are for keeping safety not for specification guarantee. A) Secure sufficient installation space (minimum installation area Amin).

  • Page 11: Specifications

    SPECIFICATIONS OCH756...
  • Page 12 OCH756...

  • Page 13: Data

    DATA 4-1. REFILLING REFRIGERANT CHARGE (R32: kg) Initial amount of Additional refrigerant charging amount Permitted pipe Maximum amount of refrigerant Model length refrigerant Up to 15 m Exceeding 15 m SWM60, 80 2 m - 30 m 1.3 kg 20 g × (refrigerant piping length (m) – 15) 1.60 kg SWM100, 120 2 m - 30 m...
  • Page 14 PUD-SWM100VAAR1 PUD-SWM120VAAR1 PUD-SWM100YAAR1 PUD-SWM120YAAR1 PUD-SHWM100VAAR1 PUD-SHWM120VAAR1 PUD-SHWM100YAAR1 PUD-SHWM120YAAR1 SPL(dB) SPL(dB) MODE LINE MODE LINE HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000...

  • Page 15: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm OCH756...

  • Page 16: Wiring Diagram

    WIRING DIAGRAM PUD-SWM60VAAR1 PUD-SWM80VAAR1 PUD-SWM100VAAR1 PUD-SWM120VAAR1 PUD-SHWM60VAAR1 PUD-SHWM80VAAR1 PUD-SHWM100VAAR1 PUD-SHWM120VAAR1 OCH756...
  • Page 17 PUD-SHWM140VAAR1 OCH756...
  • Page 18 PUD-SWM80YAAR1 PUD-SWM100YAAR1 PUD-SWM120YAAR1 PUD-SHWM80YAAR1 PUD-SHWM100YAAR1 PUD-SHWM120YAAR1 PUD-SHWM140YAAR1 OCH756...

  • Page 19: Wiring Specifications

    WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) SWM60V SWM80V SWM100V SWM120V SWM80 - 120Y Outdoor unit model SHWM140V SHWM60V SHWM80V SHWM100V SHWM120V SHWM80 - 140Y ~/N (single), ~/N (single), ~/N (single), ~/N (single), ~/N (single), 3N~ (3 ph 4-wires), Outdoor unit power supply 50 Hz, 230 V 50 Hz, 230 V...

  • Page 20: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUD-SWM60VAAR1 PUD-SWM80VAAR1 PUD-SWM80YAAR1 PUD-SWM100VAAR1 PUD-SWM100YAAR1 PUD-SWM120VAAR1 PUD-SWM120YAAR1 unit: mm (in) Defrosting: CHECK/V(H) P-sensor Heating: CHECK/V(L) Stop valve [12.7(1/2) Heat exchanger with service port REV/V ON: Heating Strainer3 (#50) H/P SW Strainer4 (#100) Muffler TH32 TH33 Strainer1 (#100) COMP Stop valve [6.35(1/4)
  • Page 21 Symbol Parts name Detail COMP Compressor DC inverter scroll compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF: 4.14 MPa) REV/V Reversing (4-way) valve (21S4) Change the refrigerant circuit (Heating) and for Defrosting CHECK/V Charge plug...

  • Page 22: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check the contents below before investigating details.
  • Page 23 Check code Abnormal point and detection method Cause Judgment and action 63H connector open 1 Disconnection or contact fail- 1 Check connection of 63H connector on Abnormal if 63H connector circuit is open for ure of 63H connector on out- outdoor controller circuit board.
  • Page 24 <Abnormalities detected while unit is operating> Check code Abnormal point and detection method Cause Judgment and action High pressure (High pressure switch 1 Defective operation of stop 1 Check if stop valve is fully open. 63H operated) valve (Not fully open) Abnormal if high pressure switch 63H 2 Clogged or broken pipe 2 Check piping and repair defect.
  • Page 25 Check code Abnormal point and detection method Cause Judgment and action Open/short of outdoor unit thermistors 1 Disconnection or contact failure 1 Check connection of connector (TH3, TH32, (TH3, TH32, TH6, TH7, and TH8) of connectors TH7/6) on the outdoor controller circuit board. Abnormal if open or short is detected Outdoor controller circuit board: Check connection of connector (CN3) on the...
  • Page 26 Check code Abnormal point and detection method Cause Judgment and action Detailed To find out the details about U9 error, turn ON SW2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 when U9 error occurs. codes To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Refer to "9-7.
  • Page 27 From the previous page. Check code Abnormal point and detection method Cause Judgment and action Detailed PFC/IGBT error 1 Incorrect switch settings on the 1 Correction of a model select codes (Undervoltage) outdoor controller circuit board for • When Compressor is running, model select DC bus voltage stays at 310 V or 2 Defective outdoor power circuit...
  • Page 28 Check code Abnormal point and detection method Cause Judgment and action Compressor overcurrent interruption 1 Stop valve of outdoor unit is closed. 1 Open stop valve. Abnormal if overcurrent DC bus or 2 Decrease of power supply voltage 2 Check facility of power supply. compressor is detected after compressor 3 Looseness, disconnection or 3 Correct the wiring (U·V·W phase) to...
  • Page 29 Check code Abnormal point and detection method Cause Judgment and action Indoor/outdoor unit communication 1 Contact failure of indoor/ 1 Check disconnection or looseness of indoor/ error (Signal receiving error) (Outdoor outdoor unit connecting wire outdoor unit connecting wire of indoor or unit) 2 Defective communication circuit outdoor units.
  • Page 30 9-3. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display does not 1 12 VDC is not supplied to remote controller. 1 Check LED2 on indoor controller board. work. (1) When LED2 is lit: Check the remote controller wiring for break- ing or contact failure.
  • Page 31 Phenomena Countermeasure ■ These sounds can be heard when refrigerant and/or water is (are) flowing A flowing water sound or occasional hissing sound is heard. in the indoor unit or refrigerant pipe, or when the refrigerant and/or water is (are) chugging. ■...
  • Page 32 Symptoms: “Please Wait” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “Please Wait” after turning on the main power. How long is 6 minutes 2 minutes “Please Wait” or more or less •...
  • Page 33 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 1 LED1: LED2: LED3: Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 34 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 2 LED1: LED2: LED3: Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 35 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 3 LED1: LED2: LED3: — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. 10 to 16 VDC? •...
  • Page 36 9-4. HOW TO CHECK THE PARTS Parts name Checkpoints Thermistor (TH3) Disconnect the connector then measure the resistance with a multimeter. <Liquid> (At the ambient temperature 10 to 30°C) Thermistor (TH4) Normal Abnormal <Discharge> Thermistor (TH6) 160 to 410 k" <2-phase pipe>...
  • Page 37 Check method of DC fan motor (fan motor/outdoor controller circuit board) Notes · High voltage is applied to the connector (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 controller circuit Self check...
  • Page 38 <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) • Thermistor <Suction> (TH32) Thermistor R0 = 15 k" ± 3 % B constant = 3480 ± 1 % =15exp{3480( 273+t – 273 )} 0 °C 15 k"...
  • Page 39 Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve>...
  • Page 40 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 41 9-6. TEST POINT DIAGRAM Outdoor controller circuit board <CAUTION> TEST POINT1 is high voltage. CNDM Manual defrost, detect 1–2: Input of low-level sound priority mode Demand control setting CN51 history record reset, Function switch refrigerant address 1–3: External signal output Input of external contact point •...
  • Page 42 Outdoor noise filter circuit board PUD-SHWM140VAAR1 LI, NI POWER SUPPLY Voltage of 230 VAC is input (Connect to the terminal block (TB1)) CNAC1, CNAC2 230 VAC (Connect to the outdoor controller circuit board) EI, E3, E4 (Connect to the earth) TB1, TB2 POWER SUPPLY Voltage of 230 VAC is...
  • Page 43 PUD-SWM80YAAR1 PUD-SWM100YAAR1 PUD-SWM120YAAR1 PUD-SHWM80YAAR1 PUD-SHWM100YAAR1 PUD-SHWM120YAAR1 PUD-SHWM140YAAR1 LO1, LO2, LO3 CNAC2 POWER SUPPLY 230 VAC LO1-LO2/LO2-LO3/LO3-LO1 : 400 VAC OUTPUT (Connect to the outdoor controller (Connect to the outdoor converter circuit board (L1-IN), ACL2, ACL3) circuit board (CNAC)) Connect to the outdoor converter circuit board (N-IN) E2,E3...
  • Page 44 Outdoor power circuit board Brief Check of DIP-IPM and DIODE MODULE If they are short-circuited, it means that they are broken. PUD-SWM60VAAR1 Measure the resistance in the following points (connectors, etc.). PUD-SWM80VAAR1 1. Check of DIP-IPM PUD-SWM100VAAR1 P2 - U2 , P2 - V2 , P2 - W2 , N2 - U2 , N2 - V2 , N2 - W2 PUD-SWM120VAAR1 P3 - U3 , P3 - V3 , P3 - W3 , N3 - U3 , N3 - V3 , N3 - W3 PUD-SHWM60VAAR1...
  • Page 45 PUD-SHWM140VAAR1 Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). 1. Check of POWER MODULE 1 Check of DIODE circuit R - P1 , S - P1, R - N1 , S - N1 2 Check of PFC circuit P2 - L1 , P2 - L2 , P2 - L3 , N2 - L1 , N2 - L2 , N2 - L3 3 Check of INVERTER circuit...
  • Page 46 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUD-SWM80YAAR1 Measure the resistance in the following points (connectors, etc.). PUD-SWM100YAAR1 1. Check of DIODE MODULE PUD-SWM120YAAR1 L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 PUD-SHWM80YAAR1 2.
  • Page 47 Outdoor converter circuit board PUD-SWM80YAAR1 PUD-SWM100YAAR1 PUD-SWM120YAAR1 PUD-SHWM80YAAR1 PUD-SHWM100YAAR1 PUD-SHWM120YAAR1 PUD-SHWM140YAAR1 L1-IN, N-IN L1-A1 CK-OU Connect to the noise filter Connect to the ACL1 Connect to the CK capacitor circuit board (LO1, NO) Connect to the outdoor power circuit board (CN7) L1-A2, L2-A2, L3-A2 L1-OU, L2-OU, L3-OU...
  • Page 48 9-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS Type Action by the switch operation Function Effective timing Switch Function of switches switch ■ The black square ( ) indicates a switch position. — — — No function Action by the switch operation Type of Switch No.
  • Page 49 SPECIAL FUNCTIONS 9.7.1. Low noise mode (on-site modification) (Fig. 9-7-1) 1. Using the CNDM connector (Option) CNDM Orange By performing the following modification, operation noise of the outdoor unit can be reduced. Brown The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to the CNDM connector (option) on the control board of the outdoor unit.
  • Page 50 <Display function of inspection for outdoor unit> The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of abnormal- ity can be indicated in details by connecting an optional part “A-Control Service Tool (PAC-SK52ST)” to connector CNM on out- door controller board.
  • Page 51 Indication Error Outdoor controller board Detailed Check Contents Inspection method reference code* LED1 (Green) LED2 (Red) page 3 blinking 1 blinking Abnormality of discharge 1 Check if stop valves are open. temperature (TH4) and Comp. 2 Check if connectors (TH4, LEV-A) on outdoor con- surface temperature (TH33) troller board are not disconnected.
  • Page 52 <Outdoor unit operation monitor function> [When optional part “A-Control Service Tool (PAC-SK52ST)” is connected to outdoor controller board (CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of check code by controlling DIP SW2 on “A-Control Service Tool”.
  • Page 53 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The pipe temperature/Liquid (TH3) −40 to 90 −40 to 90 (When the coil thermistor detects 0°C or below, “–” and temperature are displayed by turns.) Example: When −10°C °C 0.5 s...
  • Page 54 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The pipe temperature/Liquid (TH3) −39 to 88 when the last error occurred (When the temperature is 0°C or below, “–” and −39 to 88 temperature are displayed by turns.) Example: When −15°C °C...
  • Page 55 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The outdoor unit setting information • The tens digit (Total display for applied setting) Setting details Display details H·P / Cooling only 0: H·P 1: Cooling only Single phase / 3 phase 0: Single phase 2: 3 phase Code...
  • Page 56 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The number of defrost cycles 0 to FFFE (in hexadecimal notation) 0 to FFFE (When more than FF in hex (255 in decimal), the number is displayed in order of 163's and 162's, and 161's and 160's places.) 2 cycles...
  • Page 57 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The fan step when the last error 0 to 16 occurred Step 0 to 16 2 3 4 5 6 The LEV-C opening pulse 0 to 500 0 to 500 (When it is 100 pulse or more, hundreds digit, tens...
  • Page 58 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The thermo-on time until error stops 0 to 999 0 to 999 (When it is 100 minutes or more, hundreds digit, tens digit and ones digit are displayed by turns.) Minute Example: When 415 minutes 0.5 s...
  • Page 59 <Service check mode:SW7-2 ON Backup data> ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The primary current when the last error 0 to 50 occurred 0 to 50 2 3 4 5 6 The DC bus voltage when the last error 100 to 1023 occurred...
  • Page 60 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The fan step when the second-to-last 0 to 16 error occurred 0 to 16 Step 2 3 4 5 6 The return water temperature (THW2) 0 to 60 when the second-to-last error occurred 0 to 60...
  • Page 61 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The heat sink temperature (TH8) when −40 to 200 the second-to-last error occurred (When it is 0 or less, “–” and numbers are displayed −40 to 200 by turns.) °C...
  • Page 62 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The indoor liquid pipe temperature −39 to 88 (TH2) when the third-to-last error Indoor liquid pipe temperature (TH2) occurred Σ(TH2(N))/n °C −39 to 88 (When it is 0 or less, “–”...
  • Page 63 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The operation mode when the fourth-to- This setting shows the operation mode when the last error occurred fourth-to-last error occurred as well as the default setting (Please refer to the following).
  • Page 64 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The outdoor 2-phase pipe temperature −39 to 88 (TH6) when the fourth-to-last error (When it is 0 or less, “–” and numbers are displayed occurred by turns.) °C...

  • Page 65: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 10-1. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Refer to indoor unit service manual for how to use the controllers and request codes for indoor unit. Description Request content Unit...
  • Page 66 Description Request content Unit Remarks (Display range) Outdoor unit-Control state Refer to 10-1-1.Detail Contents in Request Code. ― Compressor-Frequency control state Refer to 10-1-1.Detail Contents in Request Code. ― Outdoor unit-Fan control state Refer to 10-1-1.Detail Contents in Request Code. ―...
  • Page 67 Description Request content Unit Remarks (Display range) 103 Error history 1 (latest) Displays error history. (" --" is displayed if no history is present.) Code 104 Error history 2 (second to last) Displays error history. (" --" is displayed if no history is present.) Code 105 Error history 3 (third to last) Displays error history.
  • Page 68 10-1-1. Detail Contents in Request Code [Operation state] (Request code: "0") Relay output state Data display Power currently Display Compressor Four-way valve Solenoid valve supplied to compressor ─ ─ ─ ─ Relay output state Operation mode Operation mode Display Operation mode STOP •...
  • Page 69 [Actuator output state] (Request code: "54") Data display Actuator output state 1 Actuator output state 2 Actuator output state Actuator output state Compressor is Display Display Four-way valve Compressor warming up [Error content (U9)] (Request code: "55 ") Data display Error content 1 Error content 2 Error content...

  • Page 70: Disassembly Procedure

    [Outdoor unit -– Capacity setting display] (Request code: "70") Data display Capacity [Outdoor unit – Setting information] (Request code: "71") Setting information 1 Data display Display Defrost mode Setting information 1 Standard Setting information 2 For high humidity Setting information 2 Single-/ Heat pump/ Heat pump/...
  • Page 71 OPERATING PROCEDURE PHOTOS/ FIGURES 2. Removing the fan motor (MF1) Photo 2-1 Photo 2-2 (1) Remove the service panel. (See Photo 1) Propeller (2) Remove the top panel. (See Photo 1) Fan motor fixing screws (3) Remove the wire grille fixing screws (6 for front/ 5 × 12), then slide the wire grille upward to remove it.
  • Page 72 OPERATING PROCEDURE PHOTOS/ FIGURES 4. Disassembling the electrical parts box Photo 4-1 Photo 4-2 (V-type model only) (1) Remove the electrical parts box. (See Photo 3-1) Cont base front Power circuit board (2) Disconnect all the connectors on the controller circuit board. (3) To remove the controller circuit board, release it from the support.
  • Page 73 OPERATING PROCEDURE PHOTOS/ FIGURES 6. Disassembling the electrical parts box Photo 6-1 Photo 6-2 (SHWM140V model only) Cont base Cont base front (1) Remove the electrical parts box. (See Photo 3-1) (2) Disconnect all the connectors on the controller circuit board. (3) To remove the controller circuit board, release it from the support.
  • Page 74 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 9 9. Removing the thermistor <Liquid> (TH3) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Thermistor <Liquid> (TH3) (3) Remove the cover panel (front). (See Photo 3-1) (4) Remove the cover panel (rear) fixing screws (2 for rear and 2 for right/ 5 ×...
  • Page 75 OPERATING PROCEDURE PHOTOS/ FIGURES 11. Removing the 4-way valve coil (21S4), LEV coil (LEV-A, Photo 11 (SWM model) 4-way 4-way valve LEV-C ), lead wire for high pressure switch and high (*1) valve coil pressure sensor. 4-way valve coil fixing screw (1) Remove the electrical parts box.
  • Page 76 Note 1: Pay extra attention when handling the reactor since it is very heavy (4.1 kg). HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2021 MITSUBISHI ELECTRIC CORPORATION Published: Jan. 2021 No.OCH756 Made in Japan Specifications are subject to change without notice.

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