Mitsubishi PUHZ-SW160YKA.UK Service Manual
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Mitsubishi PUHZ-SW160YKA.UK Service Manual

Split-type, air to water heat pump
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SPLIT-TYPE, AIR TO WATER HEAT PUMP

SERVICE MANUAL

Outdoor unit

[Model Name]
PUHZ-SW160YKA
PUHZ-SW200YKA
Salt proof model
PUHZ-SW160YKA-BS
PUHZ-SW200YKA-BS
R410A
[Service Ref.]
PUHZ-SW160YKA.UK
PUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA-BS.UK
Note:
• This manual describes service
Data of the outdoor units only.
CONTENTS
1. REFERENCE MANUAL ································· 2
2. SAFETY PRECAUTION ································· 2
3. FEATURES ····················································· 6
4. SPECIFICATIONS ·········································· 7
5. DATA ······························································· 8
6. OUTLINES AND DIMENSIONS ··················· 11
7. WIRING DIAGRAM ······································ 12
8. WIRING SPECIFICATIONS ·························· 13
9. REFRIGERANT SYSTEM DIAGRAM ············· 15
10. TROUBLESHOOTING ·································· 17
11. DISASSEMBLY PROCEDURE ····················· 60
PARTS CATALOG (OCB583)
March 2015
No. OCH583

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Summary of Contents for Mitsubishi PUHZ-SW160YKA.UK

  • Page 1: Service Manual

    SPLIT-TYPE, AIR TO WATER HEAT PUMP March 2015 No. OCH583 SERVICE MANUAL R410A Outdoor unit [Model Name] [Service Ref.] PUHZ-SW160YKA.UK PUHZ-SW160YKA Note: • This manual describes service PUHZ-SW200YKA.UK data of the outdoor units only. PUHZ-SW200YKA Salt proof model PUHZ-SW160YKA-BS.UK PUHZ-SW160YKA-BS PUHZ-SW200YKA-BS.UK PUHZ-SW200YKA-BS CONTENTS 1. REFERENCE MANUAL ································· 2 2. SAFETY PRECAUTION ································· 2 3.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service Model Name Service Ref. Manual No. ERSE-YM9EC ERSE-YM9EC.UK ERSE-MEC ERSE-MEC.UK OCH590* EHSE-YM9EC EHSE-YM9EC.UK OCB590* EHSE-MEC EHSE-MEC.UK PAC-IF012B-E PAC-IF012B-E PAC-IF021B-E PAC-IF021B-E OCB427 PAC-IF032B-E PAC-IF032B-E PAC-SIF051B-E PAC-SIF051B-E OCB536 PAC-IF061B-E PAC-IF061B-E OCB572 PAC-IF062B-E PAC-IF062B-E * The service manual is scheduled to be issued on May 2015. SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected.
  • Page 3 Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. In case of using the existing pipes for R22, be careful with Vacuum pump oil may flow back into refrigerant cycle and the following: that can cause deterioration of refrigerant oil, etc. ·...
  • Page 4 [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool name Specifications Gauge manifold · Only for R410A · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose · Only for R410A · Use pressure performance of 5.09MPa·G or over. Electronic scale — Gas leak detector · Use the detector for R134a, R407C or R410A. Adaptor for reverse flow check · Attach on vacuum pump. Refrigerant charge base — Refrigerant cylinder ·...
  • Page 5 2 Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refriger- ants. Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R410A has been speci- fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes. Use torque wrench corresponding to each dimension. Dimension A Dimension B Flare cutting dimensions Flare nut dimensions Dimension B (mm) Dimension A ( (mm) Nominal Outside Nominal Outside -0.4 (mm) (mm) dimensions (in) diameter dimensions (in) diameter R410A R410A 6.35 17.0 17.0 6.35 9.52...

  • Page 6: Features

    FEATURES PUHZ-SW160YKA PUHZ-SW200YKA PUHZ-SW160YKA-BS PUHZ-SW200YKA-BS CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Maximum 30 m The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver/ accumulator always control the optimal refrig- erant level regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during installation often causes problems. It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time. OCH583...

  • Page 7: Specifications

    SPECIFICATIONS PUHZ-SW160YKA.UK Service Ref. PUHZ-SW200YKA.UK PUHZ-SW200YKA-BS.UK PUHZ-SW160YKA-BS.UK Power supply (phase, cycle, voltage) 3 phase 50Hz, 400V Max. current Munsell 3Y 7.8/1.1 External finish Linear Expansion Valve Refrigerant control Hermetic Compressor ANB52FRNMT Model Motor output Inverter Starter type Protection devices HP switch Comp.

  • Page 8: Data

    Piping length (one way) Initial Service Ref. 10 m 20 m 30 m 40 m 50 m 60 m 70 m charged PUHZ-SW160YKA.UK + 0.9 (8.0) + 1.8 (8.9) + 2.7 (9.8) + 3.6 (10.7) PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA.UK + 1.2 (8.9) + 2.4 (10.1) + 3.6 (11.3) + 4.8 (12.5) PUHZ-SW200YKA-BS.UK Additional charge is required for pipes longer than 30 m. 5-2. ADJUSTING THE AMOUNT OF REFRIGERANT Amount of additional refrigerant charge (kg) Permitted Initial charge Service Ref.
  • Page 9 5-4. NOISE CRITERION CURVES MICROPHONE UNIT 1.5m GROUND PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK SPL(dB) SPL(dB) MODE LINE MODE LINE COOLING COOLING PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK 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...

  • Page 10: Table Of Contents

    5-5. <REFERENCE DATA> PLATE HEAT EXCHANGER (ACH70-74 PLATES) (SW200) (SW160) Nominal water flow Nominal water flow L/min 63.1 L/min 71.7 Heating Heating Capacity 25.0 Capacity 22.0 (A7/W35) (A7/W35) 4.00 4.20 Power input 6.250 Power input 5.238 Heating Heating Capacity 25.0 Capacity 22.0 (A7/W45) (A7/W45) 3.10...

  • Page 11: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-SW160YKA.UK Unit: mm PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK OCH583...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> CY1, CY2 Capacitor Switch <Function Switch> Terminal Block <Indoor/Outdoor> P.B. Power Circuit Board Switch <Function Switch> TB-U/V/W Motor for Compressor Connection Terminal <U/V/W-Phase> Switch <Pump Down>...

  • Page 13: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model SW160/200 Outdoor unit power supply 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit input capacity main switch (Breaker) *1 32 A Outdoor unit power supply 5 × Min. 4 Cable length 50m:3×4 (Polar)/ Indoor unit-Outdoor unit Cable length 80m:3×6 (Polar) Indoor unit-Outdoor unit earth 1 × Min. 2.5 Remote controller-Indoor unit 2 × 0.3 (Non-polar) Outdoor unit L-N (single) 230 V AC Outdoor unit L1-N, L2-N, L3-N (3 phase) Indoor unit-Outdoor unit S1-S2 230 V AC Indoor unit-Outdoor unit S2-S3 24 V DC Remote controller-Indoor unit 12 V DC *1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV). Make sure that the current leakage breaker is one compatible with higher harmonics. Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter. The use of an inadequate breaker can cause the incorrect operation of inverter. *2. Max 80 m Total Max. including all indoor/indoor connection is 80 m. • Use one cable for S1 and S2, and another for S3 as shown in the picture.
  • Page 14 8-2. INDOOR – OUTDOOR CONNECTING CABLE The cable shall not be lighter than design 60245 IEC or 60227 IEC. Wire No. o Size (mm²) Outdoor power supply Max. 45 m Max. 50 m Max. 80 m Indoor unit-Outdoor unit 3 o 1.5 (polar) 3 o 2.5 (polar) 3 o 2.5 (polar) and S3 separated Indoor unit-Outdoor unit earth...

  • Page 15: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM 9-1. REFRIGERANT SYSTEM DIAGRAM PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK Unit : mm (in) Refrigerant flow in cooling Refrigerant flow in heating High pressure Charge plug Heat exchanger sensor 63HS (High pressure) Ball valve Thermistor TH7 Thermistor TH6 (Ambient)
  • Page 16 9-2. 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 (lowpressure side) on the outdoor unit. 3 Close the liquid stop valve completely. 4 Supply power (circuit breaker). • W hen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CEN- TRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally. • S tart-up of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned on. 5 Perform the refrigerant collecting operation (cooling test run). • P ush the pump-down SWP switch (push-button type) on the control board of the outdoor unit. The compressor and ventilators (indoor and outdoor units) start operating (refrigerant collecting operation begins). (LED1 and LED2 on the control board of the outdoor unit are lit.) • O nly push the pump-down SWP switch if the unit is stopped. However, even if the unit is stopped and the pump-down SWP switch is pushed less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed. Wait until the compressor has been stopped for 3 minutes and then push the pump-down SWP switch again. 6 F ully close the ball valve on the gas pipe side of the outdoor unit when the pressure gauge on the gauge manifold shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm²) and quickly stop the air conditioner. • B ecause the unit automatically stops in about 3 minutes when the refrigerant collecting operation is completed (LED1 off, LED2 lit), be sure to quickly close the gas ball valve. However, if LED1 is lit, LED2 is off, and the unit is stopped, open the liquid stop valve completely, close the valve completely after 3 minutes or more have passed, and then repeat step 5. (Open the gas ball valve completely.) • I f the refrigerant collecting operation has been completed normally (LED1 off, LED2 lit), the unit will remain stopped until the power supply is turned off.

  • Page 17: Troubleshooting

    TROUBLESHOOTING 10-1. 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 wired remote controller and control board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below. Check the contents below before investigating details. Unit conditions at service Actions to be taken for service (summary) Check code Judge what is wrong and take a corrective action according Displayed to “10-2.
  • Page 18 10-2. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is put on> Note: Refer to indoor unit section for codes starting with P and E. Abnormal points and detection method Judgment and action Check Code Case 1 No voltage is supplied to termi- 1 Check following items. nal block (TB1) of outdoor unit. a) Power supply breaker is a) Power supply breaker turned off. b) Contact failure or disconnec- b) Connection of power supply terminal tion of power supply terminal block. (TB1) c) Open phase (L2 or N phase) c) Connection of power supply terminal block. (TB1) 2 Electric power is not supplied 2 Check following items. to power supply terminal of out- door power circuit board.
  • Page 19 Abnormal points and detection method Case Judgment and action Check Code Miswiring of indoor/outdoor unit 1 Check disconnection or looseness or polarity 1 Contact failure or miswiring of indoor/outdoor unit connecting of indoor/outdoor unit connecting wire of connecting wire wire indoor and outdoor units. 1. Outdoor controller circuit board can automatically check the number of 2 Diameter or length of indoor/ outdoor unit connecting wire is connected indoor units. Abnormal if the 2 Check diameter and length of indoor/outdoor out of specified capacity. unit connecting wire. number cannot be checked automatically Total wiring length: 80 m due to miswiring of indoor/outdoor unit 3 Excessive number of indoor units are connected to 1 out- (including wiring connecting each indoor unit connecting wire, etc. after power is door unit. and between indoor and outdoor unit) turned on for 4 minutes.
  • Page 20 <Abnormalities detected while unit is operating> Abnormal points and detection method Judgment and action Check Code Case High pressure (High-pressure switch 1 Decreased water flow 1−5 Check water circuit and repair defect. 63H operated) 2 Clogged filter of water pipe Abnormal if high-pressure switch 63H 3 Locked water pump (4.15MPa) operated during compressor 4 Malfunction of water pump operation. 5 Dirt of indoor heat exchanger 6 Defective operation of stop 6 Check if stop valve is fully open. valve (Not full open) 7 Clogged or broken pipe 7 Check piping and repair defect. 8 Locked outdoor fan motor 8−1 Check outdoor unit and repair defect. 9 Malfunction of outdoor fan motor 0 Short cycle of outdoor unit 1 Dirt of outdoor heat exchanger (1302)
  • Page 21 Check Code Abnormal points and detection method Judgment and action Case 1 Check connection of connector (TH3,TH6/TH7) Open/short of outdoor unit thermistors 1 Disconnection or contact failure on the outdoor controller circuit board. Check (TH3, TH6, TH7, and TH8) of connectors connection of connector (CN3) on the outdoor Abnormal if open or short is detected during Outdoor controller circuit power circuit board. Check breaking of the lead compressor operation. board: TH3, TH6/TH7 wire for thermistor (TH3,TH6,TH7,TH8). Refer to Open detection of thermistors TH3 and TH6 Outdoor power circuit board: "10-6. TEST POINT DIAGRAM" is inoperative for 10 seconds to 10 minutes 2 Check resistance value of thermistor after compressor starting and 10 minutes 2 Defective thermistor (TH3,TH6,TH7,TH8) or check temperature by after and during defrosting.
  • Page 22 Abnormal point and detection method Judgment and action Check Code Case To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Detailed Refer to "10-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". codes 1 C heck the field facility for the power Overvoltage error 1 A bnormal increase in power source supply. • Increase in DC bus voltage to voltage 2 C orrect the wiring (U . V . W phase) to 760 V 2 D isconnection of compressor wiring compressor. Refer to "10-6. TEST POINT DIAGRAM" (Outdoor power circuit board). 3 R eplace outdoor power circuit board. 3 D efective outdoor power circuit 4 C heck compressor for electrical insula- board...
  • Page 23 Abnormal point and detection method Case Judgment and action Check Code Over heat protection 1 Defective outdoor fan (fan 1 Check outdoor unit air passage. motor) or short cycle of outdoor Abnormal if thermistor <liquid> (TH3) unit during cooling operation detects 70: or more during compressor operation. 2 Defective thermistor <liquid> 23 Turn the power off and on again to check (TH3) the check code. If U4 is displayed, follow the (1504) U4 processing direction. 3 Defective outdoor controller board Abnormal pressure of pressure sensor 1 Check connection of connector (63HS) on 1 Disconnection or contact the outdoor controller circuit board. (63HS) failure of connector (63HS) on Check breaking of the lead wire for thermistor Abnormal if pressure sensor (63HS) the outdoor controller circuit...
  • Page 24 Check Code Abnormal points and detection method Case Judgment and action Compressor overcurrent interruption 1 O pen stop valve. 1 Stop valve of outdoor unit is Abnormal if overcurrent DC bus or com- closed. 2 Check facility of power supply. pressor is detected after compressor starts 2 Decrease of power supply voltage 3 C orrect the wiring (U W phase) to compres- • • operating for 30 seconds. sor. Refer to "10-6. TEST POINT DIAGRAM". 3 Looseness, disconnection or converse of compressor wiring (Outdoor power circuit board). connection 4 Check outdoor fan. 5 Solve short cycle. 4 Defective fan of outdoor units 6 Replace outdoor controller circuit board.
  • Page 25 Check Code Abnormal points and detection method Judgment and action Case Remote controller transmission error (E3)/signal receiving error (E5) 1 2 remote controller are set as 1 Set a remote controller to main, and the “main.” other to sub. 1 Abnormal if remote controller could not find blank of transmission path for 6 (In case of 2 remote controllers) seconds and could not transmit. Refer to the indoor unit's (Check code: E3) Installation Manual for remote controller connection. 2 Remote controller receives transmitted data at the same time, compares the 2 Repetition of refrigerant 2 The address changes to a separate setting. data, and when detecting it, judges address different data to be abnormal 30 3 Defective transmitting receiving 3−5 Diagnose remote controller. continuous times. (Check code: E3) circuit of remote controller a) When “RC OK” is displayed, remote...
  • Page 26 Check Code Case Judgment and action Abnormal points and detection method Indoor/outdoor unit communication 1 Indoor/ outdoor unit connecting 1 Check disconnection or looseness of indoor/ error (Transmitting error) (Outdoor unit) wire has contact failure. outdoor unit connecting wire. 2–4 Turn the power off, and on again to 1 Abnormal if “0” receiving is detected 30 2 Defective communication circuit times continuously though outdoor con- of outdoor controller circuit board check. Replace outdoor controller circuit (6841) troller circuit board has transmitted “1”. board if abnormality is displayed again. 3 Noise has entered power supply. 2 Abnormal if outdoor controller circuit 4 Noise has entered indoor/ out- board could not find blank of transmission door unit connecting wire. path for 3 minutes. Non defined error code 1 Noise has entered transmission 12 Turn the power off, and on again to check.
  • Page 27 10-3. TROUBLESHOOTING OF PROBLEMS Countermeasure Phenomena Factor 1. Remote controller display does not 1 12 V DC is not supplied to remote controller. 1 C heck LED2 on indoor controller board. work. (Power supply display is not indicated on LCD.) (1) When LED2 is lit. 2 1 2–15 V DC is supplied to remote controller, how- Check the remote controller wiring for ever, no display is indicated. breaking or contact failure. • “PLEASE WAIT” is not displayed. (2) When LED2 is blinking. • “PLEASE WAIT” is displayed. Check short circuit of remote controller wiring. (3) When LED2 is not lit. Refer to phenomena No.3 below. 2 C heck the following. • Failure of remote controller if “PLEASE WAIT” is not displayed • Refer to phenomena No.2 below if “PLEASE WAIT” is displayed. 1 Normal operation 2. “PLEASE WAIT” display is remained 1 A t longest 2 minutes after the power supply “PLEASE 2 Self-diagnosis of remote controller...
  • Page 28 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 29 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 (TB1) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 30 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 (TB1) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 31 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 of the indoor controller. 10 to 16 V DC? •...
  • Page 32 • Before repair Frequent calling from customers Phone Calls From Customers How To Respond Note Unit does 1 The operating display of remote 1 Check if power is supplied to air conditioner. not operate controller does not come on. Nothing appears on the display unless power is at all.
  • Page 33 Phone Calls From Customers How To Respond Note The room cannot be cooled or heated sufficiently. 1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
  • Page 34 10-4. HOW TO CHECK THE PARTS PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK Check points Parts name Disconnect the connector then measure the resistance with a tester. Thermistor (TH3) (At the ambient temperature 10 to 30°C) <Liquid> Thermistor (TH6) Normal Abnormal <2-phase pipe>...
  • Page 35 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) Self check...
  • Page 36 <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 k" ± 3% B constant = 3480 ± 2% =15exp{3480( – 273+t 15 k" 30: 4.3 k" 10: 9.6 k" 40: 3.0 k" 20: 6.3 k" 25: 5.2 k" -20 -10 0 10 20 30 40 50 Temperature (:) Medium temperature thermistor • Thermistor <Heat sink> (TH8) Thermistor R50 = 17 k"...
  • Page 37 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 cir- cuit 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> Outdoor controller board 12 V DC Gray Drive circuit Orange Yellow Black Connector LEV-A <Output pulse signal and the valve operation> Output Output (Phase) Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8 Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1 The output pulse shifts in above order. · When linear expansion valve operation stops, all output phases become OFF.
  • Page 38 (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. Be sure to detach the coil holding main body firmly. Otherwise pipes can bend due to pressure. <How to attach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and attach the coil by inserting it downward into the main body. Then securely attach the coil stop- per to main body. (At this time, be careful that stress is not added Be sure to attach to lead wire and main body is not wound by lead wire.) If the the stopper.
  • Page 39 10-6. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK CN51 CNDM External signal output Forced defrost, 1 to 2: Input of low-level sound priority mode • Compressor operating signal detect history Demand control setting 1 to 3: Input of external contact point • Abnormal signal record reset, refrigerant address Model select Test operation Pump down Function switch Pipe replace Wiring replace Transmission to out- Connect to A control door power circuit service tool board (CN4)
  • Page 40 Outdoor noise filter circuit board PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : 400 V AC input LI1-NI/LI2-NI/LI3-NI : 230 V AC input (Connect to the terminal block (TB1)) CNAC1, CNAC2 230 V AC (Connect to the outdoor controller circuit board (CNAC)) Connect to the earth Connect to the earth CNDC (Connect to the outdoor controller circuit board (CNDC)) CNCT Primary current (Connect to the outdoor power circuit board (CN5)) LO1, LO2, LO3 POWER SUPPLY...
  • Page 41 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUHZ-SW160YKA.UK Measure the resistance in the following points (connectors, etc.). PUHZ-SW200YKA.UK If they are short-circuited, it means that they are broken. 1. Check of DIODE MODULE PUHZ-SW160YKA-BS.UK L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 PUHZ-SW200YKA-BS.UK...
  • Page 42 10-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS The black square ( ) indicates a switch position. (1) Function of switches Action by the switch operation Type of Swich No. Function Effective timing Switch When compressor is working Forced defrost * Start Normal in heating operation. * Abnormal history clear Clear Normal off or operating 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6...
  • Page 43 Special function (a) Low-level sound priority mode (Local wiring) By performing the following modification, operation noise of the outdoor unit can be reduced by about 3-4 dB. 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. • T he ability varies according to the outdoor temperature and conditions, etc. 1 C omplete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option) 2 S W7-1 (Outdoor unit control board): OFF 3 S W1 ON: Low noise mode SW1 OFF: Normal operation X: Relay A Circuit diagram example CNDM Orange (low noise mode) D Outdoor unit control board Brown E Maximum 10 m B On-site arrangement C External input adapter F Power supply for relay (PAC-SC36NA-E) (b) On demand control (Local wiring) By performing the following modification, energy consumption can be reduced to 0–100% of the normal consumption. The demand function 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. 1 C omplete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option) 2 B y setting SW7-1 on the control board of the outdoor unit, the energy consumption (compared to the normal consumption) can be limited as shown below.
  • Page 44 <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 abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board. [Display] (1)Normal condition Outdoor controller board A-Control Service Tool Unit condition LED1 (Green) LED2 (Red) Check code Indication of the display Lighted Lighted Alternately blinking display When the power is turned on When unit stops Lighted Not lighted...
  • Page 45 Indication Error Outdoor controller board Check Detailed Contents Inspection method code reference LED1 (Green) LED2 (Red) page 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of comp. surface P.20 2Check if connectors (TH32 and LEV-A) on outdoor controller thermistor(TH32) board are not disconnected.
  • Page 46 <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’. Operation indicator SW2 : Indicator change of self diagnosis SW2 setting Display detail Explanation for display Unit 2 3 4 5 6 <Digital indicator LED1 working details> (Be sure that the 1 to 6 in the SW2 are set to OFF.) (1) Display when the power supply ON 1 second When the power supply ON, blinking displays by turns.
  • Page 47 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:; 2 3 4 5 6 0.5 s 0.5 s 2 s − −52 to 221 Comp. surface temperature (TH32) (When the discharge thermistor detects 100: or −52 to 221 more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105:; 2 3 4 5 6 0.5 s 0.5 s 2 s Output step of outdoor FAN 0 to 10 0 to 10 Step 2 3 4 5 6 0 to 9999 The number of ON / OFF times of com-...
  • Page 48 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:; 0.5 s 0.5 s 2 s 2 3 4 5 6 Comp. surface temperature (TH32) on −52 to 221 error occurring (When the temperature is 100: or more, the −52 to 221 hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130:; 2 3 4 5 6 0.5 s 0.5 s 2 s Compressor operating current on error 0 to 50 occurring 0 to 50 2 3 4 5 6 Error history (1) (latest) When no error history,...
  • Page 49 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 4 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. Capacity Code SW160YKA Code SW200YKA display 2 3 4 5 6 Outdoor unit setting information • The tens digit (Total display for applied setting) Setting details Display details H·P / Cooling only...
  • Page 50 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17 to 30 17 to 30 °C 2 3 4 5 6 Outdoor pipe temperature/ 2-phase −39 to 88 (TH6) (When the temperature is 0: or less, “–” and °C −39 to 88 temperature are displayed by turns.) 2 3 4 5 6 Outdoor Ambient temperature (TH7) −39 to 88 −39 to 88 (When the temperature is 0: or less, “–” and °C temperature are displayed by turns.) 2 3 4 5 6 Outdoor Heat sink temperature (TH8) −40 to 200 −40 to 200...
  • Page 51 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Error postponement code history (2) Postponement code display of outdoor unit Blinking: During postponement Code Lighting: Cancellation of postponement display “00” is displayed in case of no postponement. 2 3 4 5 6 Error postponement code history (3) Postponement code display of outdoor unit Blinking: During postponement Lighting: Cancellation of postponement Code “00” is displayed in case of no postponement. display 2 3 4 5 6 Error history (3) (Oldest) When no error history, “0” and “– –“ are displayed by Alternate display of abnormal unit num- turns. ber and code. Code display 2 3 4 5 6 Error thermistor display 3: Outdoor pipe temperature /Liquid (TH3) 6: Outdoor pipe temperature /2-phase (TH6)
  • Page 52 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Outdoor temperature/ Ambient (TH7) on −39 to 88 error occurring (When the temperature is 0°C or less, “–” and −39 to 88 temperature are displayed by turns.) (Example) When −15°C; 0.5 s 0.5 s 2 s 2 3 4 5 6 −40 to 200 Outdoor temperature/ Heat sink (TH8) (When the temperature is 0°C or less, “–” and on error occurring temperature are displayed by turns.) −40 to 200 (When the temperature is 100°C or more, hundreds 2 3 4 5 6 digit, tens digit and ones digit are displayed by turns.) 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.) 2 3 4 5 6 Cooling = TH32−T...
  • Page 53 The black square ( ) indicates a switch position. Display detail Unit SW2 setting Explanation for display 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 • The ones digit (In this digit, the total number of activated control is displayed.) Display Compressor operating frequency control Preventive control for excessive temp- erature rise of discharge temperature...
  • Page 54 10-8. 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 Remarks (Display range)
  • Page 55 Description Request content Unit Remarks (Display range) – Outdoor unit-Control state – Refer to 10-8-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 10-8-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 10-8-1.Detail Contents in Request Code. –...
  • Page 56 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 57 10-8-1. 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 58 [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 59 [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/ Display cooling only 3-phase Heat pump Single-phase Cooling only Heat pump 3-phase...

  • Page 60: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK OPERATING PROCEDURE PHOTOS Photo 1 1. Removing the service panel and top panel (1) R emove the service panel fixing screws (4 for front/ 5 x 12), then slide the service panel downward to remove it. Top panel fixing screws Top panel (The service panel is fixed to the side panel (R) with a hook on the right side.) (2) Remove the top panel fixing screws (3 for front and 3 for Service panel rear/ 5 x 12) to remove the top panel. Wire Side panel (R) grille Note: When removing service panel and top panel at the...
  • Page 61 PHOTOS OPERATING PROCEDURE 3. Removing the electrical parts box Photo 4 Electrical parts box (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the power supply cable from terminal block. (4) D isconnect the indoor/outdoor connecting wire from Controller terminal block. circuit board (5) D isconnect the connector CNF1 (WHT), CNF2 (WHT), TH3 (WHT), TH7/ 6 (RED), TH32 (BLK), 63H (YLW), 21S4 Electrical parts (GRN), LEV-A (WHT) and 63HS (WHT) from the controller box fixing screws circuit board. <Symbols on the board> • Fan motor (CNF1, CNF2) Terminal block Terminal block • Thermistor <Liquid> (TH3) (Indoor/Outdoor) (Power supply) • Thermistor <Ambient/ 2-Phase Pipe> (TH7/6) • Thermistor <Comp. Surface> (TH32) Side panel (R) • High pressure switch (63H) • 4-way valve (21S4) • LEV (LEV-A) • High pressure sensor (63HS)
  • Page 62 PHOTOS OPERATING PROCEDURE 4. Disassembling the electrical parts box Controller Photo 5 Cont base circuit board (C.B.) (1) Disconnect all the connectors on the controller circuit board. (2) To remove the controller circuit board, release it from the support. (3) Remove cont base fixing screws (2 for front/ 4 x 10). (Photo 5) (The cont. base is fixed to the cont base piece with a hook on the left side.) Screw (4) D isconnect all the connectors on the noise filter circuit Screw board. (Photo 6) (5) T o remove the noise filter circuit board, release it from the support. (6) Remove N.F. base fixing screws (2 for front/ 4 x 10). (Photo 7) (7) D isconnect all the connectors on the power circuit board. (8) To remove the power circuit board, remove power board fixing screws (4 for front/ 4 x 12), then release the board from the support. (Photo 8) (9) The reactor is attached to the rear side of the electrical parts box. (Photo 9) (To remove the reactor, the electrical parts box must be separated from the outdoor unit.) Note: When reassembling the electrical parts box, make sure the wirings are correct.
  • Page 63 OPERATING PROCEDURE PHOTOS 6. Removing the thermistor <Ambient> (TH7) Photo 11 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) D isconnect the connector TH7/6 (RED) on the controller circuit board in the electrical parts box. (See Photo 4) (4) L oosen the fastener for the lead wire in the electrical parts box. (5) Loosen the clamps for the lead wire on top of the electrical parts box. (6) Pull out the thermistor <Ambient> (TH7) from thermistor holder. Note: When replacing thermistor <Ambient> (TH7), replace it together with thermistor <2-phase pipe> (TH6), since they are combined together. Refer to procedure No.4 in the previous page to remove the Sensor holder thermistor <2-phase pipe>(TH6).
  • Page 64 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A)) Photo 13 and lead wire for high pressure switch. High pressure (1) Remove the service panel. (See Photo 1) switch (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 4) (4) Loosen the clamp for the lead wire on separator. [Removing the lead wire for high pressure switch] (5) Disconnect the lead wire from the high pressure switch. [Removing the 4-way valve coil] LEV coil (5) Remove the 4-way valve coil fixing screw (1 for front/ M5) (LEV A)
  • Page 65 OPERATING PROCEDURE PHOTOS 10. Removing the compressor (MC) Photo 14 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 4) Valve bed (4) Remove the cover panel (front). (See Photo1) (5) Remove the cover panel (rear). (See Photo 1) (6) Remove the valve bed. (See photo 14) Valve bed fixing screw (7) Remove the side panel (R). (See Photo 1) (8) Remove the front panel fixing screws (5 for front/ 5x12 Valve and 2 for front/ 4x10), then slide the front panel upward to Separator bed remove it. fixing screws (The front panel is fixed with 4 hooks; 3 on the left side fixing to the side panel (L), and the other on the right side fixing to the separator.) Accumulator (9) Release the lead wire for FM1 and FM2 from the hole on separator. (10) Remove the separator fixing screws (4 for front/ 4x10), then slide the separator upward to remove it. (The separator is fixed to a hook of the side plate.) Compressor (MC) (11) Recover refrigerant. (12) Remove the welded part of compressor (2 positions).
  • Page 66 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN New publication, effective Mar. 2015 CCopyright 2015 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Distributed in Mar. 2015 No.OCH583 Made in Japan...

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