Mitsubishi Electric PUHZ-SW75VAA-SC Service Manual
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Mitsubishi Electric PUHZ-SW75VAA-SC Service Manual

Air to water heat pump
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AIR TO WATER HEAT PUMP UNITS
SERVICE MANUAL
[Model Name]
PUHZ-SHW80VAA
PUHZ-SHW112VAA
PUHZ-SHW80YAA
PUHZ-SHW112YAA
PUHZ-SW75VAA
PUHZ-SW100VAA
PUHZ-SW75YAA
PUHZ-SW100YAA
PUHZ-SW75VAA-SC
PUHZ-SW75YAA-SC
Salt proof model
PUHZ-SHW80VAA-BS
PUHZ-SHW112VAA-BS
PUHZ-SHW80YAA-BS
PUHZ-SHW112YAA-BS
PUHZ-SW75VAA-BS
PUHZ-SW100VAA-BS
PUHZ-SW75YAA-BS
PUHZ-SW100YAA-BS
[Service Ref.]
PUHZ-SHW80VAA.UK
PUHZ-SHW112VAA.UK
PUHZ-SHW80YAA.UK
PUHZ-SHW112YAA.UK
PUHZ-SW75VAA.UK
PUHZ-SW100VAA.UK
PUHZ-SW75YAA.UK
PUHZ-SW100YAA.UK
PUHZ-SW75VAA-SC.UK
PUHZ-SW75YAA-SC.UK
PUHZ-SHW80VAA-BS.UK
PUHZ-SHW112VAA-BS.UK
PUHZ-SHW80YAA-BS.UK
PUHZ-SHW112YAA-BS.UK
PUHZ-SW75VAA-BS.UK
PUHZ-SW100VAA-BS.UK
PUHZ-SW75YAA-BS.UK
PUHZ-SW100YAA-BS.UK
R410A
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ······························· 3
3. SPECIFICATIONS ········································ 7
4. DATA ··························································· 10
5. OUTLINES AND DIMENSIONS·················· 12
6. WIRING DIAGRAM ····································· 13
7. WIRING SPECIFICATIONS ························ 17
8. REFRIGERANT SYSTEM DIAGRAM ········ 18
9. TROUBLESHOOTING ································ 21
11. DISASSEMBLY PROCEDURE ··················· 66
PARTS CATALOG (OCB651)
August 2017
No. OCH651
REVISED EDITION-A
Revision:
• Added
PUHZ-SW75VAA-SC.UK and
PUHZ-SW75YAA-SC.UK
in REVISED EDITION-A.
• Some descriptions have
been modified.
• OCH651 is void.
Note:
• This manual describes
service data of the outdoor
units only.

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Summary of Contents for Mitsubishi Electric PUHZ-SW75VAA-SC

  • Page 1: Table Of Contents

    AIR TO WATER HEAT PUMP UNITS August 2017 No. OCH651 SERVICE MANUAL REVISED EDITION-A R410A [Model Name] [Service Ref.] Revision: PUHZ-SHW80VAA.UK PUHZ-SHW80VAA • Added PUHZ-SW75VAA-SC.UK and PUHZ-SHW112VAA.UK PUHZ-SHW112VAA PUHZ-SW75YAA-SC.UK PUHZ-SHW80YAA.UK PUHZ-SHW80YAA in REVISED EDITION-A. PUHZ-SHW112YAA.UK PUHZ-SHW112YAA • Some descriptions have been modified. PUHZ-SW75VAA.UK PUHZ-SW75VAA PUHZ-SW100VAA.UK...

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM Service Model name Service ref. manual No. EHST20C-VM6HB EHST20C-VM6HB.UK EHST20C-YM9HB EHST20C-YM9HB.UK EHST20C-TM9HB EHST20C-TM9HB.UK EHST20C-VM2B EHST20C-VM2B.UK OCH531 EHST20C-VM6B EHST20C-VM6B.UK OCB531 EHST20C-YM9B EHST20C-YM9B.UK EHST20C-VM6EB EHST20C-VM6EB.UK EHST20C-YM9EB EHST20C-YM9EB.UK EHST20C-VM6SB EHST20C-VM6SB.UK EHSC-VM2B EHSC-VM2B.UK EHSC-VM6B EHSC-VM6B.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] 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 5 2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES Flowchart • Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter dryer. • If the diameter of the existing pipes is different from the specified diameter, refer to technological data materials to confirm if the pipes can be used. Measure the existing pipe thickness and check for damage.
  • Page 6 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 7: Specifications

    SPECIFICATIONS Service Ref. PUHZ-SHW80VAA(-BS).UK PUHZ-SHW80YAA(-BS).UK Power source (Phase, cycle, voltage) Single 50 Hz, 230 V 3-Phase 50 Hz, 400 V Max. current 22.0 13.0 External finish Munsell: N8.75 Munsell N2.75 (FRONT PANEL) Refrigerant control Linear Expansion Valve Compressor Hermetic Model DNK28FBAMT DNK28FBBMT Motor output...
  • Page 8 Service Ref. PUHZ-SW75VAA(-BS).UK PUHZ-SW75YAA(-BS).UK Power source (Phase, cycle, voltage) Single, 50Hz, 230V 3-Phase 50 Hz, 400 V Max. current 22.0 11.5 External finish Munsell: N8.75 Munsell N2.75 (FRONT PANEL) Refrigerant control Linear Expansion Valve Compressor Hermetic Model SNB220FEGMC-L1 SNB220FEAMC-L1 Motor output Starter type Inverter Protection devices...
  • Page 9 Service Ref. PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK Power source (Phase, cycle, voltage) Single, 50Hz, 230V 3-Phase 50 Hz, 400 V Max. current 22.0 11.5 External finish Munsell: N8.75 Munsell N2.75 (FRONT PANEL) Refrigerant control Linear Expansion Valve Compressor Hermetic Model SNB220FEGMC-L1 SNB220FEAMC-L1 Motor output...

  • Page 10: Data

    60 m 75 m PUHZ-SHW80VAA(-BS).UK PUHZ-SHW112VAA(-BS).UK PUHZ-SHW80YAA(-BS).UK PUHZ-SHW112YAA(-BS).UK PUHZ-SW75VAA(-BS).UK — — — PUHZ-SW75YAA(-BS).UK PUHZ-SW75VAA-SC.UK — — — PUHZ-SW75YAA-SC.UK PUHZ-SW100VAA(-BS).UK PUHZ-SW100YAA(-BS).UK Additional charge is required for pipes longer than 30 m (SHW80/SHW112) and 10 m (SW75/SW100). 4-2. COMPRESSOR TECHNICAL DATA (at 20:) PUHZ-SHW80VAA(-BS).UK...
  • Page 11 NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz PUHZ-SW75VAA(-BS).UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA(-BS).UK PUHZ-SW75YAA-SC.UK SPL(dB) SPL(dB) MODE LINE MODE LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60...

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK Unit: mm OCH651A...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply, Indoor/Outdoor> P. B. Power Circuit Board Motor for Compressor C. B. Controller Circuit Board Fan Motor Switch <Manual Defrost, Defect History Record Reset, 21S4 Solenoid Valve (4-Way Valve) Refrigerant Address>...
  • Page 14 PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> TH33 Thermistor <Comp. Surface> Switch <Function Switch > Terminal Block <Indoor/Outdoor> LEV-A, LEV-B, LEV-C Linear Expansion Valve Switch <Function Switch, Model Select > Motor for Compressor ACL1, ACL2, Switch <Function Switch >...
  • Page 15 PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75VAA-SC.UK SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply, Indoor/Outdoor> C. B. Controller Circuit Board Motor for Compressor Switch <Manual Defrost, Defect History Record Reset, Fan Motor Refrigerant Address> 21S4 Solenoid Valve (4-Way Valve) Switch <Function Switch>...
  • Page 16 PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75YAA-SC.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> TH33 Thermistor <Comp. Surface> Switch <Function Switch > Terminal Block <Indoor/Outdoor> Linear Expansion Valve LEV-A, LEV-B Switch <Function Switch > Motor for Compressor ACL1, ACL2, Switch <Function Switch, Model Select >...

  • Page 17: Wiring Specifications

    WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) SW75V, SHW80V SW100V, SHW112V SW75, 100Y SHW80, 112Y Outdoor unit model ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit power supply Outdoor unit input capacity Main switch (Breaker) *1 3 ×...

  • Page 18: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK unit: mm (in) P-SENSOR Heat exchanger Ball valve REV/V Strainer6 CHECK/V(H) Refrigerant GAS pipe L/P SW (#50) connection [15.88(5/8) H/P SW Strainer5 (#100) CHECK/V(L) MUFFLER TH32 TH33 Strainer3 Strainer1 (#100) (#100) INJ port...
  • Page 19 Refrigerant flow in cooling Refrigerant flow in heating Symbol Parts name Detail COMP Compressor DC inverter scroll compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF: 4.15MPa) L/P SW Low pressure switch (63L) For protection (OFF: −0.03MPa)
  • Page 20 8-1. REFRIGERANT COLLECTING (PUMP DOWN) When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refriger- ant is released into the atmosphere. 1 Turn off the power supply (circuit breaker). 2 Connect the low-pressure valve on the gauge manifold to the charge plug (low-pressure side) on the outdoor unit. 3 Close the liquid stop valve completely.

  • Page 21: 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 22 9-2. SELF-DIAGNOSIS ACTION TABLE Note: Refer to indoor unit section for code P, code E, and Code L. <Abnormalities detected when the power is turned on> Abnormal point and detection method Judgment and action Check code Cause 1 No voltage is supplied to terminal 1 Check following items.
  • Page 23 Check Code Abnormal point and detection method Cause Judgment and action 2 connector open (SW100/SHW80/ 1 Check connection of connector (63H,63L) on 1 Disconnection or contact failure SHW112 only) of connector (63H,63L) on outdoor controller circuit board. Abnormal if both 63H and 63L connector outdoor controller circuit board Refer to "9-6.TEST POINT DIAGRAM".
  • Page 24 <Abnormalities detected while unit is operating> Check Code Abnormal point and detection method Judgment and action Cause High pressure (High pressure switch 1 Check if stop valve is fully open. 1 Defective operation of stop 63H operated) valve (Not fully open) 2 Check piping and repair defect.
  • Page 25 Check code Abnormal point and detection method Judgment and action Cause Open/short of outdoor unit thermistors 1 Disconnection or contact failure 1 Check connection of connector (TH3, TH32*, (TH3, TH32 (PUHZ-SHW only), TH6, TH7, of connectors TH7/6) on the outdoor controller circuit board. and TH8) Outdoor controller circuit board: Check connection of connector (CN3) on the...
  • Page 26 Check code Abnormal point and detection method Judgment and action Cause 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. Detailed To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. codes Refer to "9-7.
  • Page 27 From the previous page. Check code Abnormal point and detection method Judgment and action Cause PFC error (Overvoltage/ 1 Abnormal increase in power 12 Check the field facility for the power supply. Detailed codes Undervoltage/Overcurrent) source voltage 2 Decrease in power source •...
  • Page 28 Abnormal point and detection method Judgment and action Check code Cause 1 Stop valve of outdoor unit is 1 Open stop valve. Compressor overcurrent interruption closed. Abnormal if overcurrent DC bus or 2 Decrease of power supply 2 Check facility of power supply. compressor is detected after compressor voltage starts operating for 30 seconds.
  • Page 29 Check code Abnormal point and detection method Judgment and action Cause Remote controller transmission error (E3)/ signal receiving error (E5) 1 Abnormal if remote controller could not 1 The address changes to a separate setting. find blank of transmission path for 6 1 Duplication of refrigerant seconds and could not transmit.
  • Page 30 Abnormal point and detection method Judgment and action Check code Cause Pipe temperature 1 Slight temperature difference 1–4 Check pipe <liquid or condenser/evaporator> <Cooling mode> between indoor room temperature temperature with room temperature display Detected as abnormal when the pipe and pipe <liquid or condenser/ on remote controller and outdoor controller temperature is not in the cooling range...
  • Page 31 9-3. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display does not 1 1 2 V DC 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 32 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 33 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. 6 minutes 2 minutes or more or less How long is “PLEASE WAIT” •...
  • Page 34 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 35 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 36 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 V DC? •...
  • Page 37 PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK Parts name Check points Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Liquid> (At the ambient temperature 10 to 30:) Thermistor (TH4) Normal Abnormal <Discharge>...
  • Page 38 Check method of DC fan motor (fan motor/outdoor 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 controller circuit Self check...
  • Page 39 <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) • Thermistor <Suction> (TH32) (PUHZ-SHW only) Thermistor R0 = 15 k" ± 3 % B constant = 3480 ± 2 % =15exp{3480( 273+t –...
  • Page 40 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 41 (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 42 PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK <CAUTION> TEST POINT1 is high voltage. CNDM Manual defrost, detect 1–2: Input of low-level sound priority mode Demand control setting history record reset, CN51 Function switch refrigerant address 1–3:...
  • Page 43 Outdoor noise filter circuit board PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75YAA-SC.UK LO1, LO2, LO3 CNAC2 POWER SUPPLY 230 V AC LO1-LO2/LO2-LO3/LO3-LO1 : AC400V 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...
  • Page 44 L , N , N1 , N2 , N3 , P1 , P2 , P3 , U2 , U3 , V2 , V3 , W2 , and W3 PUHZ-SW75VAA-SC.UK shown in the diagram are not actually printed on the board.
  • Page 45 Outdoor power circuit board Brief Check of POWER MODULE PUHZ-SHW80YAA.UK • Usually, they are in a state of being short-circuited if they are broken. PUHZ-SHW112YAA.UK Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. PUHZ-SW75YAA.UK 1.
  • Page 46 Outdoor converter circuit board PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75YAA-SC.UK 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...
  • Page 47 PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW75VAA.UK PUHZ-SW100VAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA.UK PUHZ-SW100YAA.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK Type Action by the switch operation Function Effective timing Switch switch When compressor is working Manual defrost * Start Normal in heating operation.* Abnormal history clear...
  • Page 48 ■ The black square ( ) indicates a switch position. Action by the switch operation Type of Switch Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery* 3,4,5,6 No function —...
  • Page 49 PUHZ-SW75VAA-BS.UK PUHZ-SW100VAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW100YAA-BS.UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK <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 abnor- mality can be indicated in details by connecting an optional part “A-Control Service Tool (PAC-SK52ST)” to connector CNM on outdoor controller board.
  • Page 50 Indication Error Outdoor controller board Detailed Check Contents Inspection method reference code* LED1 (Green) LED2 (Red) page 3 blinking 1 blinking Abnormality of discharging 1Check if stop valves are open. 2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller temperature (TH4) and Comp.
  • Page 51 <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 error code by controlling DIP SW2 on “A-Control Service Tool”.
  • Page 52 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) −40 to 90 −40 to 90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When −10:;...
  • Page 53 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) on error −40 to 90 occurring (When the coil thermistor detects 0: or below, “–” −40 to 90 and temperature are displayed by turns.) (Example) When −15:;...
  • Page 54 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 3 The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code.
  • Page 55 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Flow water temperature 0 to 100 0 to 100 2 3 4 5 6 2-phase pipe temperature −39 to 88 −39 to 88 (When the temperature is 0: or less, “–”...
  • Page 56 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit DC bus voltage 180 to 370 (When it is 100 V or more, hundreds digit, tens 180 to 370 digit and ones digit are displayed by turns.) 2 3 4 5 6 Error postponement code history (2) Postponement code display...
  • Page 57 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 480 LEV-C opening pulse on error occurring (When it is 100 pulse or more, hundreds digit, tens 0 to 480 digit and ones digit are displayed by turns.) (Example) When 130 pulse;...
  • Page 58 ■ The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail 0 to 255 Discharge superheat on error occurring (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by 0 to 255 turns.) Cooling = TH4−T...
  • Page 59 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Controlling status of compressor The following code will be a help to know the operating frequency operating status of unit. • The tens digit Display Compressor operating frequency control Primary current control Secondary current control...

  • Page 60: 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 61 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 62 Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays error history. (" --" is displayed if no history is present.) Code Error history 2 (second to last) Displays error history. (" --" is displayed if no history is present.) Code Error history 3 (third to last) Displays error history.
  • Page 63 10-1-1. Detail Contents in Request Code [Operation state] (Request code :" 0") Relay output state Power currently Data display Display Compressor Four-way valve Solenoid valve supplied to compressor – – – – Relay output state Operation mode Operation mode Display Operation mode STOP •...
  • Page 64 [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 Four-way valve Compressor Display warming up [Error content (U9)] (Request code :"55 ") Data display Error content 1 Error content 2 Error content...
  • Page 65 [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/...

  • Page 66: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-SHW80VAA.UK PUHZ-SHW112VAA.UK PUHZ-SHW80YAA.UK PUHZ-SHW112YAA.UK PUHZ-SHW80VAA-BS.UK PUHZ-SHW112VAA-BS.UK PUHZ-SHW80YAA-BS.UK PUHZ-SHW112YAA-BS.UK PUHZ-SW100VAA.UK PUHZ-SW100YAA.UK PUHZ-SW100VAA-BS.UK PUHZ-SW100YAA-BS.UK OPERATING PROCEDURE PHOTOS 1. Removing the service panel and top panel Photo 1 Top panel Top panel fixing screws (1) Remove the service panel fixing screws (3 for front and 1 for right/ 5 ×...
  • Page 67 OPERATING PROCEDURE PHOTOS 4. Disassembling the electrical parts box (V model only) Photo 4-1 Photo 4-2 (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 68 OPERATING PROCEDURE PHOTOS 6. Removing the thermistor <2-Phase Pipe> (TH6) Photo 6 (1) Remove the service panel. (See Photo 1) Thermistor <2-Phase Pipe> (TH6) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (RD) on the controller circuit board in the electrical parts box.
  • Page 69 OPERATING PROCEDURE PHOTOS 9. Removing the thermistor <Discharge> (TH4), thermistor Photo 9-1 <Suction> (TH32) and thermistor <Comp. Surface> (TH33) (*1) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the cover panel (front). (See Photo 3-1) Thermistor (4) Remove the comp case (top).
  • Page 70 OPERATING PROCEDURE PHOTOS 11. Removing the 4-way valve, LEV (LEV-A, LEV-B, LEV-C Photo 11 (SHW model) (*1) high pressure switch, low pressure switch and high pres- sure sensor. 4-way valve coil (1) Remove the service panel. (See Photo 1) fixing screw (2) Recover refrigerant.
  • Page 71 OPERATING PROCEDURE PHOTOS 13. Removing the receiver Photo 13 (1) Remove the service panel. (See Photo 1) (2) Recover refrigerant. (3) Remove the piping. (4) Remove the receiver leg fixing screws (2 for top/ 4 × 10), then slide the receiver upward to remove it. (The receiver is fixed to the base with a hook on the bottom.) Note 1: Recover refrigerant without spreading it in the air.
  • Page 72 PUHZ-SW75VAA.UK PUHZ-SW75YAA.UK PUHZ-SW75VAA-BS.UK PUHZ-SW75YAA-BS.UK PUHZ-SW75VAA-SC.UK PUHZ-SW75YAA-SC.UK OPERATING PROCEDURE PHOTOS Top panel 1. Removing the service panel and top panel Photo 1 Top panel fixing screws (1) Remove the service panel fixing screws (3 for front and 1 for right/ 5 × 12), then slide the service panel downward to remove it.
  • Page 73 OPERATING PROCEDURE PHOTOS 4. Disassembling the electrical parts box (V model only) Photo 4-1 Photo 4-2 (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.
  • Page 74 OPERATING PROCEDURE PHOTOS 6. Removing the thermistor <2-Phase Pipe> (TH6) Photo 6 (1) Remove the service panel. (See Photo 1) Thermistor <2-Phase Pipe> (TH6) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (RD) on the controller circuit board in the electrical parts box.
  • Page 75 OPERATING PROCEDURE PHOTOS 9. Removing the thermistor <Discharge> (TH4) and thermis- Photo 9 tor <Comp. Surface> (TH33) (1) Remove the service panel. (See Photo 1) Thermistor <Comp. (2) Remove the top panel. (See Photo 1) Surface> (TH33) (3) Remove the cover panel (front). (See Photo 3-1) (4) Remove the comp case (top).
  • Page 76 OPERATING PROCEDURE PHOTOS Photo 11-1 12. Removing the compressor (MC) 4-way valve coil 4-way valve (1) Remove the service panel. (See Photo 1) fixing screw (2) Recover refrigerant. (3) Remove the electrical parts box. (See Photo 3-1) (4) Remove the valve bed. (See Photo 3-1) 4-way valve coil (5) Remove the side panel (R).
  • Page 77 OCH651A...
  • Page 78 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Issued: Aug. 2017 No.OCH651 REVISED EDITION-A Published: May 2017 No.OCH651 Made in Japan Specifications are subject to change without notice.

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