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Mitsubishi Electric PUHZ-P200YKA3 Service Manual
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Mitsubishi Electric PUHZ-P200YKA3 Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model Name]
PUHZ-P200YKA3
PUHZ-P250YKA3
[Service Ref.]
PUHZ-P200YKA3.UK
PUHZ-P250YKA3.UK
 
R410A
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 ············· 18
10. TROUBLESHOOTING ·································· 20
11. FUNCTION SETTING ··································· 74
13. EASY MAINTENANCE FUNCTION ············· 92
14. DISASSEMBLY PROCEDURE ····················· 95
PARTS CATALOG (OCB679)
November 2017
No. OCH679
Note:
• This manual describes service
data of the outdoor units only.

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS November 2017 No. OCH679 SERVICE MANUAL R410A Outdoor unit [Model Name] [Service Ref.] PUHZ-P200YKA3.UK PUHZ-P200YKA3 Note: • This manual describes service data of the outdoor units only. PUHZ-P250YKA3.UK PUHZ-P250YKA3 CONTENTS 1. REFERENCE MANUAL ································· 2 2. SAFETY PRECAUTION ································· 2 3. FEATURES ····················································· 6 4.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service Model Name Service Ref. Manual No. OCH626 PLA-RP50/60/71/100/125EA.UK PLA-RP50/60/71/100/125EA OCB626 OCH492 PCA-RP71HAQ PCA-RP71HAQ(-ER) OCB492 OCH659 PCA-M50/60/71/100/125KA PCA-M50/60/71/100/125KA OCB659 OCH660 PKA-M50HA(L) PKA-M50HA(L) OCB660 OCH661 PKA-M60/71/100KA(L) PKA-M60/71/100KA(L).TH OCB661 OCH528 PSA-RP71/100/125KA PSA-RP71/100/125KA OCB528 HWE16130 PEAD-M50/60/71/100/125JA(L).UK PEAD-M50/60/71/100/125JA(L) BWE017010 HWE17030 PEA-RP200/250WKA PEA-RP200/250WKA BWE10140 SAFETY PRECAUTION...
  • 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 weighing 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) Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different. 1 Thickness of pipes Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7 mm or below.) Diagram below: Piping diameter and thickness Thickness (mm) Nominal Outside diameter (mm) dimensions (inch) R410A 6.35 9.52 12.70 15.88 19.05 — 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.

  • Page 6: Features

    FEATURES PUHZ-P200YKA3 PUHZ-P250YKA3   CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Maximum 30 m (PUHZ-P200/250) The refrigerant circuit with LEV (Linear Expansion Valve) and accumulator always control the optimal refrigerant level regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during instal- lation 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. OCH679...

  • Page 7: Specifications

    SPECIFICATIONS Service Ref. PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK 3 phase 50 Hz, 400 V Power supply (phase, cycle, voltage) Max. current Munsell 3Y 7.8/1.1 External finish Linear Expansion Valve Refrigerant control Hermetic Compressor Model ANB52FRNMT Motor output Inverter Starter type HP switch Protection devices...

  • Page 8: Data

    Initial Service Ref. 10 m 20 m 30 m 40 m 50 m 60 m 70 m charged PUHZ-P200YKA3.UK + 0.9 (7.4) + 1.8 (8.3) + 2.7 (9.2) + 3.6 (10.1) PUHZ-P250YKA3.UK + 1.2 (8.9) + 2.4 (10.1) + 3.6 (11.3) + 4.8 (12.5) Additional charge is required for pipes longer than 30 m. 5-2. ADJUSTING THE AMOUNT OF REFRIGERANT PUHZ-P200/250 Permitted Initial charge Amount of additional refrigerant charge (kg) Service Ref.
  • Page 9 5-4. NOISE CRITERION CURVES MICROPHONE UNIT 1.5 m GROUND PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK MODE SPL(dB) MODE SPL(dB) LINE LINE COOLING COOLING 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...
  • Page 10 0.07 × 2 Input 0.10 × 2 0.10 × 2 0.64 × 2 Current 0.44 × 2 0.66 × 2 0.46 × 2 Outdoor unit PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK Phase , Hz 3, 50 3, 50 Voltage Current 9.18 9.28 10.47 10.97 2.58...

  • Page 11: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-P200YKA3.UK Unit: mm PUHZ-P250YKA3.UK OCH679...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK SYMBOL SYMBOL NAME SYMBOL NAME NAME Terminal Block <Power Supply> P.B. Power Circuit Board Switch <Function Switch> TB-U/V/W Terminal Block <Indoor/Outdoor> Connection Terminal <U/V/W-Phase> Switch <Pump Down> TB-L1/L2/L3 Motor for Compressor Connection Terminal <L1/L2/L3-Power Supply> CN31 Connector <Emergency Operation>...

  • Page 13: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model P200/250Y Outdoor unit power supply 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit input capacity main switch (Breaker) *1 Outdoor unit power supply 5 × Min 4 Indoor unit-Outdoor unit Cable length 50 m:3×4 (Polar)/Cable length 80 m:3×6 (Polar) Indoor unit-Outdoor unit earth 1 × Min 2.5 Remote controller-Indoor unit 2 × 0.3 (Non-polar) Outdoor unit L1-N, L2-N, L3-N (3 phase) *4 230 V AC 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. Maximum 80 m. Total maximum including all indoor/indoor connection is 80 m. • Use one cable for S1 and S2 and another for S3 as shown in the picture. • Maximum 50 m. Total maximum for PEA. Wiring size 3 × 1.5 (Polar). *3. The 10 m wire is attached in the remote controller accessory. *4. T he figures are NOT always against the ground.
  • Page 14 8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES The following illustrations show available connection patterns. The outdoor unit power supply patterns vary on models. Simultaneous twin/triple system <For models without heater> The optional indoor power supply terminal kit is required. Outdoor unit power supply Earth leakage breaker Wiring circuit breaker or isolating switch Outdoor unit...
  • Page 15 8-3. INDOOR – OUTDOOR CONNECTING CABLE WIRING SPECIFICATIONS FOR 220−240 V, 50 Hz (INDOOR-OUTDOOR CONNECTING CABLE) Cross section of cable Wire size (mm Number of wires Polarity L (m)*5 Round Clockwise : S1-S2-S3 (30) (Pay attention to stripe of yellow and green.) Flat Not applicable Not applicable...
  • Page 16 8-4. M-NET WIRING METHOD Points to note: (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5 cm. Do not put them in the same conduit tube. (2) Terminal block (TB7) for transmission wires should never be connected to 220–240 V power supply. If it is connected, electronic parts on M-NET P.C. board may burn out. (3) Use 2-core × 1.25 mm² shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this because this may cause a malfunction. Refrigerant Refrigerant Refrigerant Centralized address 00 address 00 address 00 controller M-NET M-NET M-NET address 01 address 02 address 03 Power supply unit A-control A-control A-control remote remote...
  • Page 17 M-NET wiring (1) Use 2-core × 1.25 mm² shield wire for electric wires. M-NET terminal (Excluding the case connecting to system controller.) Earth block wire (2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (non-polar) to A terminal and the other to B. Peel the shield wire, twist the shield part to a string and connect it to S terminal. Transmission Shield (3) In the system which several outdoor units are being connected, the terminal (A, B, wire part S) on M-NET terminal block should be individually wired to the other outdoor unit’s terminal, i.e. A to A, B to B and S to S. In this case, choose one of those outdoor units and drive a screw to fix an earth wire on the plate as shown on the right figure. 8-4-1. M-NET address setting In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group. <Setting example> M-NET Address No. Address number can be set by using rotary switches (SW11 for 1s digit and SW12 for 10s digit), which SW11 is located on the M-NET board of outdoor unit. Switch digit – setting (Initial setting: all addresses are set to “0”.) SW12...

  • Page 18: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit: mm PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK Refrigerant flow in cooling Refrigerant flow in heating Charge plug Heat exchanger (High pressure) Ball valve Thermistor TH7 Thermistor TH6 (Ambient) (2-phase pipe) Refrigerant GAS pipe <Blazing> connection [25.4([1 inch) Strainer High pressure...
  • Page 19 9-1. REFRIGERANT COLLECTING (PUMP DOWN) When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refrig- erant 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. 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 tartup 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 venti- lators (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 20: 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 “10-4.
  • Page 21 10-2-2. Test run for wired remote controller <PAR-3xMAA ("x" represents 0 or later)> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Test run" with the F1 or F2 button, and press the button. Select "Test run" with the F1 or F2 button, and press the button.
  • Page 22 <Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. Check code, error unit, refrigerant address, unit model name, and serial Error information number will appear. Error code The model name and serial number will appear only if the information has Error unit Ref. address Unt# been registered. Model name Serial No. Press the F1 or F2 button to go to the next page. Reset error: Reset button Page Reset...
  • Page 23 <Checking the error information> While no errors are occurring, page 2/2 of the error information can be viewed by Main Main menu selecting "Error information" from the Main menu. Restriction Errors cannot be reset from this screen. Energy saving Night setback Filter information Error information Main display: Cursor Page <Error history> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Check" with the F1 or F2 button, and press the button.
  • Page 24 10-2-3. Test run for wireless remote controller (Type C) Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M". TEST RUN 1 Turn on the main power to the unit. TEST RUN 2 Press the button twice continuously. (Start this operation from the status of remote controller display turned off.) A and current operation mode are displayed. TEST RUN TEMP ON/OFF MODE 3 Press the ( ) button to activate mode, then COOL check whether cool air blows out from the unit. MODE 4 Press the ( ) button to activate mode, then HEAT check whether warm air blows out from the unit. AUTO STOP 5 Press the button and check whether strong air blows out AUTO START MODE VANE from the unit.
  • Page 25 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-3xMAA ("x" represents 0 or later)> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Select "Self check" with the F1 or F2 button, and press the button. Self check With the F1 or F2 button, enter the refrigerant address, and press the button. Ref. address Check code, unit number, attribute will appear. "-" will appear if no error history is available.
  • Page 26 10-3-2. Remote controller check <PAR-3xMAA ("x" represents 0 or later)> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press the button. Maintenance password Remote controller check Select "Remote controller check" with the F1 or F2 button, and press button. Select "Remote controller check" from the Service menu, and press the but- Remote controller check ton to start the remote controller check and see the check results. Start checking? To cancel the remote controller check and exit the Remote controller check menu screen, press the or the button.
  • Page 27 10-3-3. Self-diagnosis for wireless remote controller (Type C) When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1. Press the CHECK button twice. • "CHECK" lights, and refrigerant address Refrigerant "00" flashes. address • Check that the remote controller's display CHECK display has stopped before continuing. CHECK display 2. Press the TEMP buttons. • Select the refrigerant address of the Temperature indoor unit for the self-diagnosis. button Note: Set refrigerant address using the TEMP ON/OFF outdoor unit’s DIP switch (SW1). ON/OFF (For more information, see the button outdoor unit installation manual.) AUTO STOP 3. Point the remote controller at the...
  • Page 28 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp flash pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s Approx.
  • Page 29 10-4. 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. Check Code Abnormal points and detection method Case Judgment and action 1 Check following items. 1 No voltage is supplied to terminal block (TB1) of outdoor unit. a) Power supply breaker is turned a) Power supply breaker off. b) Contact failure or disconnection b) Connection of power supply terminal 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 to 2 Check following items. power supply terminal of outdoor power circuit board.
  • Page 30 Check Code Abnormal points and detection method Case Judgment and action 1 Contact failure or miswiring of 1 Check disconnection or looseness or Miswiring of indoor/outdoor unit indoor/outdoor unit connecting polarity of indoor/outdoor unit connecting connecting wire 1. Outdoor controller circuit board can wire wire of indoor and outdoor units. automatically check the number of 2 Diameter or length of indoor/out- connected indoor units. Abnormal if the door unit connecting wire is out of 2 Check diameter and length of indoor/out- number cannot be checked automatically specified capacity. door unit connecting wire. due to miswiring of indoor/outdoor unit Total wiring length: 80 m 3 Excessive number of indoor units connecting wire, etc. after power is turned are connected to 1 outdoor unit. (4 (including wiring connecting each indoor on for 4 minutes. units or more) unit and between indoor and outdoor unit) 2. Abnormal if outdoor controller circuit board Also check if the connection order of flat...
  • Page 31 <Abnormalities detected while unit is operating> Check Code Abnormal points and detection method Case Judgment and action 1–6 C heck indoor unit and repair defect. High pressure (High pressure switch 63H 1 Short cycle of indoor unit 2 Clogged filter of indoor unit operated) Abnormal if High pressure switch 63H (4.15 3 Decreased airflow caused by dirt of indoor fan MPa) operated during compressor operation. 4 Dirt of indoor heat exchanger 5 Locked indoor fan motor 6 Malfunction of indoor fan motor 7 Defective operation of stop valve 7 Check if stop valve is fully open. (Not full open) 8 Clogged or broken pipe 8 Check piping and repair defect.
  • Page 32 Check Code Abnormal points and detection method Case Judgment and action 1 Check connection of connector (TH3,TH6/ Open/short of outdoor unit thermistors 1 Disconnection or contact failure of connectors TH7) on the outdoor controller circuit (TH3, TH6, TH7, and TH8) Abnormal if open or short is detected during Outdoor controller circuit board. Check connection of connector compressor operation. board: TH3, TH6/TH7 (CN3) on the outdoor power circuit board. Open detection of thermistors TH3 and TH6 Outdoor power circuit board: CN3 Check breaking of the lead wire for is inoperative for 10 seconds to 10 minutes thermistor (TH3,TH6,TH7,TH8). Refer to 2 Defective thermistor after compressor starting and 10 minutes "10-9. TEST POINT DIAGRAM" 3 Defective outdoor controller circuit after and during defrosting.
  • Page 33 Check Code Abnormal points and detection method Case Judgment and action To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Detailed codes Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". 1 A bnormal increase in power source 1 C heck the field facility for the power Overvoltage error • Increase in DC bus voltage to voltage supply. 2 C orrect the wiring (U . V . W phase) to P200/250Y: 760 V 2 D isconnection of compressor wiring compressor. Refer to "10-9. TEST POINT DIAGRAM" (Outdoor power circuit board). 3 D efective outdoor power circuit board 3 R eplace outdoor power circuit board.
  • Page 34 Check Code Abnormal points and detection method Case Judgment and action Over heat protection 1 Defective outdoor fan (fan motor) 1 Check outdoor unit air passage. Abnormal if outdoor pipe thermistor (TH3) or short cycle of outdoor unit detects 70: or more during compressor during cooling operation operation. 2 Defective outdoor pipe thermistor 23 Turn the power off and on again to (UD)* check the check code. If U4 is displayed, (TH3) (1504) follow the U4 processing direction. 3 Defective outdoor controller board *The check code in the parenthesis indicates PAR-30/31MAA model. 1 Stop valve is closed. 1 Open stop valve. Compressor overcurrent interruption 2 Decrease of power supply voltage 2 Check facility of power supply. (When compressor locked) Abnormal if overcurrent of DC bus or 3 Correct the wiring (U W phase) to...
  • Page 35 Check Code Abnormal points and detection method Case Judgment and action Remote controller transmission error (E0)/ 1 Contact failure at transmission 1 Check disconnection or looseness of indoor unit or transmission wire of remote wire of remote controller signal receiving error (E4) controller. 1 Abnormal if main or sub remote controller 2 All remote controllers are set as cannot receive normally any transmission “sub” remote controller. In this 2 Set one of the remote controllers “main” if from indoor unit of refrigerant address “0” case, E0 is displayed on remote there is no problem with the action above. for 3 minutes. controller, and E4 is displayed at 3 Check wiring of remote controller. (Check code: E0) LED (LED1, LED2) on the outdoor • Total wiring length: maximum 500 m controller circuit board. (Do not use cable o 3 or more.) 2 Abnormal if sub remote controller could not receive any signal for 2 minutes.
  • Page 36 Check Code Abnormal points and detection method Case Judgment and action C heck LED display on outdoor controller Indoor/outdoor unit communication error 1 Contact failure, short circuit or miswiring (converse wiring) of circuit board. (Connect A-Control service (Signal receiving error) indoor/outdoor unit connecting tool (PAC-SK52ST)) Refer to EA−EC item if 1 Abnormal if indoor controller board could not receive any signal normally for 6 wire LED displays EA−AC. minutes after turning the power on. 2 Defective transmitting receiving 1 Check disconnecting or looseness of circuit of outdoor controller circuit indoor/outdoor unit connecting wire of 2 Abnormal if indoor controller board could not receive any signal normally for 3 board. indoor unit or outdoor unit. minutes. Check all the units in case of twin/triple/ 3 Defective transmitting receiving circuit of indoor controller board.
  • Page 37 Check Code Abnormal points and detection method Case Judgment and action 12 Check connection of each connector CN2 Serial communication error 1 Breaking of wire or contact failure of connector CN2 between the and CN4 between the outdoor controller 1 Abnormal if serial communication between outdoor controller circuit board and out- outdoor controller circuit board circuit board and the outdoor power cir- door power circuit board is defective. and the outdoor power circuit cuit board. board 2 Breaking of wire or contact failure of connector CN4 between the outdoor controller circuit board and the outdoor power circuit board 3 Defective communication circuit 3 Replace outdoor power circuit board. of outdoor power circuit board 4 Defective communication circuit of 4 Replace outdoor controller circuit board. (0403) outdoor controller circuit board for outdoor power circuit board 2 Abnormal if communication between 1 Breaking of wire or contact fail- 1 Check disconnection, looseness, or breaking ure of connector between out-...
  • Page 38 <M-NET communication error> Note: “Indoor unit” in the text indicates M-NET board in outdoor unit. Check Code Abnormal points and detection method Case Judgment and action Search the unit with same address as 1 There are 2 or more same Address duplicate definition This error is displayed when transmission address of controller of outdoor abnormality occurred. If the same address from the units of same address is detected. unit, indoor unit, FRESH is found, shut the power supply of outdoor Note: The address and attribute displayed MASTER, or LOSSNAY. unit and indoor unit and FRESH MASTER or at remote controller indicate the LOSSNAY at the same time for 2 minutes or 2 Noise has entered into (6600) controller that detected abnormality. transmission signal and signal more after the address is corrected, and turn was transformed. the power on again. Check transmission waveform or noise on transmission wire. 1 Error is detected if waveform is Hardware error of transmission processor 1 If the works of transmission wire is done...
  • Page 39 Check Code Abnormal points and detection method Case Judgment and action Common factor that has no relation NO ACK signal Always try the following when the error with abnormality source 1. Transmitting side controller detects “A7” occurs. abnormal if a message was transmitted 1 The unit of former address does not exist as address switch has but there is no reply (ACK) that a 1 Turn off the power supply of outdoor changed while the unit was message was received. Transmitting side unit, indoor unit and FRESH MASTER or energized. detects abnormality every 30 seconds, 6 LOSSNAY at the same time for 2 minutes 2 Extinction of transmission wire times continuously. or more, and turn the power on again. If voltage and signal is caused by Note: The address and attribute displayed malfunction was accidental, the unit returns...
  • Page 40 Check Code Abnormal points and detection method Case Judgment and action 4. If displayed address or attribute is remote 1 During group operation with Same as mentioned in “A7” of the previ- indoor unit of multi-refrigerant controller, indoor unit detects abnormal- ous page. system, if indoor unit transmits ity when indoor unit transmits signal to signal to remote controller while remote controller and there was no reply outdoor unit power supply of one (ACK). refrigerant system is turned off or within 2 minutes of restart, abnor- mality is detected. 2 Contact failure of transmission wire of remote controller or indoor unit 3 Disconnection of transmission connector (CN2M) of indoor unit 4 Defective transmitting receiving circuit of indoor unit or remote controller 5. If displayed address or attribute is FRESH...
  • Page 41 Check Code Abnormal points and detection method Case Judgment and action M-NET NO RESPONSE 1 Transmitting condition is repeated 1 Check transmission waveform or noise on Abnormal if a message was transmitted and fault because of noise and the transmission wire. there were reply (ACK) that message was like. 2 Turn off the power supply of outdoor unit received, but response command does not and indoor unit and FRESH MASTER or 2 Extinction of transmission wire return. Transmitting side detects abnormality voltage and signal is caused by LOSSNAY at the same time for 2 minutes every 30 seconds, 6 times continuously. over-range transmission wire. or more, and turn the power on again. If • Maximum distance .. 200 m Note: The address and attribute displayed at malfunction was accidental, the unit returns remote controller indicate the control- • Remote controller line (12 m) to normal. If the same abnormality gener- ler that did not reply (ACK).
  • Page 42 Phenomena Factor Countermeasure 4. Even controlling by the wireless 1 T he pair number settings of the wireless remote 1 Check the pair number settings. remote controller, no beep is heard controller and indoor controller board are and the unit does not start operating. mismatched. Operation display is indicated on wireless remote controller. 5. When operating by the wireless 1 N o operation for 2 minutes at most after the power 1 Normal operation remote controller, beep sound is supply ON. heard, however, unit does not start 2 Local remote controller operation is prohibited. 2 Normal operation operating. • Remote controlling adaptor is connected to CN32 on the indoor controller board. • L ocal remote controller operation is prohibited by centralized controller, etc. since it is connected to MELANS. 3 Phenomena of No.2. 3 Check the phenomena No.2. 6. Remote controller display works 1 • If refrigerant leaks, discharging 1 Refrigerant shortage normally and the unit performs temperature rises and LEV opening 2 Filter clogging cooling operation, however, the...
  • Page 43 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 44 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 (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 45 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 (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 46 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. •...
  • Page 47 • 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 48 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 49 Phone Calls From Customers How to Respond Note Something 3 Air blows out for a while after However, this control is also 3 This is not a malfunction. is wrong HEAT operation is stopped. applied to the models which The blower is operating just for cooling down the with the heated-up air conditioner.
  • Page 50 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation gets started in the room of high humidity. Water or moisture is expelled from the outdoor COOL: when pipes or piping joints are cooled, they unit.
  • Page 51 10-6. HOW TO CHECK THE PARTS PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK Parts name Check points Thermistor (TH3) <Liquid> Disconnect the connector then measure the resistance with a tester. Thermistor (TH6) (At the ambient temperature 10 to 30°C) <2-phase pipe> Thermistor (TH7) Normal Abnormal <Ambient>...
  • Page 52 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. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
  • Page 53 10-7. HOW TO CHECK THE COMPONENTS <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" 4.3 k" 30: 9.6 k" 3.0 k" 10: 40: 6.3 k" 20: 5.2 k" 25: −20 −10 0 10 20 30 40 50 Temperature (:) Medium temperature thermistor • Thermistor <Heat Sink> (TH8)
  • Page 54 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 LEV-A 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.
  • Page 55 (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 stress. <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 56 10-8. EMERGENCY OPERATION (1) When any check codes shown below is displayed on outdoor unit, or microcomputer for wired remote controller or indoor unit has a failure while no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) ON and short-circuiting the connector (CN31) on outdoor controller board. ● When following abnormalities occur, emergency operation will be available. Inspected content Check code Open/short of outdoor unit thermistor (TH3/TH6/TH7/TH8) Indoor/outdoor unit communication error • Signal receiving error (Outdoor unit) Indoor/outdoor unit communication error • Transmitting error (Indoor unit) E0–E7 Communication error other than outdoor unit Communication error between outdoor controller board and M-NET board (Serial communication error)
  • Page 57 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation mode Operation data Remarks COOL HEAT Intake temperature (TH1) 20.5: — Indoor pipe temperature (TH2) — Indoor 2-phase pipe temperature (TH5) — Set temperature — Outdoor liquid pipe temperature (TH3) (*1) Outdoor comp.
  • Page 58 10-9. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK CN51 CNDM External signal output Manual defrost, 1–2: Input of low-level sound priority mode • Compressor operating signal detect history Demand control setting 1–3: 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 service tool door power circuit board (CN4) CNMNT Connect to M-NET adapter (CN5) 21S4 4-way valve CNVMNT...
  • Page 59 Outdoor noise filter circuit board PUHZ-P200YKA3.UK PUHZ-P250YKA3.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 Connect to the ACL4...
  • Page 60 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUHZ-P200YKA3.UK Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. PUHZ-P250YKA3.UK 1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2. Check of DIP-IPM...
  • Page 61 Outdoor M-NET board (optional) Switch for communication LED11 display between LED13 LED12 Outdoor unit Receiving M-NET and outdoor board Transmitting connecting display CN2M Connect to M-NET Serial communication with outdoor board LED2 Energizing display of M-NET board (5 V power supply) LED1 SW11 SW12 Power supply (5V/12V) input Energizing display M-NET address (1s digit) M-NET address of M-NET board (10s digit) 2 to 3 5 V DC Input 1, 2 : + (12V power supply) 1 to 3 12 V DC Input 3 : –...
  • Page 62 Action by the switch operation Type of Switch No. Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery * No function 3,4,5 — — — Model select Following SW5-6 reference Mode select * Demand function Low noise mode Always No function — — — Max Hz setting (cooling) Max Hz (cooling) o 0.8 Normal Always SW7* Max Hz setting (heating)
  • Page 63 (2) Function of connector Action by open/ short operation Types Connector Function Effective timing Short Open Connector CN31 Start When power supply ON Emergency operation Normal 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...
  • Page 64 <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 Alternately blinking display When the power is turned on When unit stops Not lit 00, etc.
  • Page 65 Indication Error Outdoor controller board Check Detailed Contents Inspection method reference code LED1 (Green) LED2 (Red) page 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of comp. surface P.31 2Check if connectors (TH32 and LEV-A) on outdoor controller thermistor(TH32) board are not disconnected.
  • Page 66 <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 67 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 Comp. surface temperature (TH32) −52 to 221 −52 to 221 (When the comp. surface thermistor detects 100: or 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 Step 0 to 10 2 3 4 5 6 The number of ON/OFF times of com- 0 to 9999 pressor...
  • Page 68 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 69 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The number of connected indoor units 0 to 4 (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 P200YKA Code P250YKA 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 70 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 (When the temperature is 0: or less, “–” and (TH6) °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 71 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Capacity save 0 to 100 (When the capacity is 100% hundreds digit, tens digit 0 to 100 and ones digit are displayed by turns.) When air conditioner is connected to (Example) When 100%; M-NET and capacity save mode is 0.5 s 0.5 s 2 s demanded, a value from “0” to “100” is displayed. 2 3 4 5 6 When there is no setting of capacity save, “100” is displayed. 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...
  • Page 72 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor pipe temperature/Liquid (TH2) 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 Indoor pipe temperature/Cond./Eva. −39 to 88 (TH5) on 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 Outdoor temperature/2-phase pipe (TH6) −39 to 88 on 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 Outdoor temperature/Ambient (TH7) on −39 to 88...
  • Page 73 The black square ( ) indicates a switch position. Unit Explanation for display SW2 setting Display detail Indoor pipe temperature/Liquid (TH2 (3)) −39 to 88 Indoor 3 (When the temperature is 0°C or less, “–” and −39 to 88 temperature are displayed by turns.) 2 3 4 5 6 Indoor pipe temperature/Cond./Eva. (TH5 −39 to 88 (When the temperature is 0°C or less, “–” and (3)) Indoor 3 temperature are displayed by turns.) −39 to 88 2 3 4 5 6 When there is no indoor unit, “00” is displayed. The following code will be a help to know the Controlling status of compressor operating status of unit. operating frequency • The tens digit Display Compressor operating frequency control Primary current control Secondary current control •...

  • Page 74: Function Setting

    FUNCTION SETTING 11-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. <Table 1> Function selections (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.) : Initial setting Function Settings Mode No. Setting No. Remarks (when sent from the factory) Power failure automatic recovery The setting is Indoor temperature Average data from each indoor unit applied to all detecting Data from the indoor unit with remote controller...
  • Page 75 (2) Functions available when setting the unit number to 01–03 or AL (07 in case of wireless remote controller) • When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number of Operating Procedure. • When setting functions for a simultaneous- Twin Triple indoor unit system, set the unit number to 01 to 03 for each indoor unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number of Operating Procedure. • When setting the same functions for an entire simultaneous Twin Triple-indoor unit system, set refrigerant address to AL (07 in case of wireless remote controller) referring to 4 setting the indoor unit number of Operating Procedure. Initial setting (factory setting) ─: Not available 4-way Floor Ceiling Mode Setting Function Settings Ceiling suspended Wall mounted cassette standing concealed PLA-RP・EA PCA-HAQ PCA-M・KA PKA-M・HA(L) PKA-M・KA(L) PSA-KA PEA-WKA ● ● ● Filter sign 100 h 2500 h ● ● ● ● No filter sign indicator Air flow Quiet –...
  • Page 76 11-1-1. Selecting functions using the wired remote controller <PAR-3xMAA ("x" represents 0 or later)> <Service menu> Maintenance password is required Select "Service" from the Main menu, and press the button. Main Main menu Maintenance Initial setting At the main display, the menu button and select "Service" to make the Service maintenance setting. Main display: Cursor Page When the Service menu is selected, a window will appear asking for the pass- Service menu word. Enter maintenance password To enter the current maintenance password (4 numerical digits), move the cursor to the digit you want to change with the F1 or F2 button.
  • Page 77 <Function setting> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Function setting" with the F1 or F2 button, and press the button. Set the indoor unit refrigerant addresses and unit numbers with the F1 Function setting through F4 buttons, and then press the button to confirm the current Ref. address Unit No. Grp./1/2/3/4/All setting. Monitor: <Checking the indoor unit No.> Cursor Address When the...
  • Page 78 11-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation. (Mode 24: 2) The procedure is given after the flow chart.
  • Page 79 11-1-3. Selecting functions using the wireless remote controller <PAR-SL100A-E> 1 Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lighted and "00" blinks. (Fig. 11-1) Press the button to set the "50". Direct the wireless remote controller toward the receiver of the indoor unit and press the button. 2 Setting the unit number Press the button to set unit number A. (Fig. 11-2) Direct the wireless remote controller toward the receiver of the indoor unit and press the button. Fig. 11-1 Fig. 11-2 3 Select a mode Press the button to set Mode number B. (Fig. 11-3) Direct the wireless remote controller toward the receiver of the indoor unit and press the button. Current setting number: 1=1 beep (1 second) 2=2 beep (1 second each) 3=3 beep (1 second each) 4 Selecting the setting number...
  • Page 80 11-2. FUNCTION SELECTION OF REMOTE CONTROLLER 11-2-1. <PAR-32MAA> The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear. <Main display> <Main menu> Main Main menu Vane·Louver·Vent. (Lossnay) High power Room Timer Cool Set temp. Auto Weekly timer OU silent mode Main display: Mode Temp. Cursor Page Function buttons...
  • Page 81 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-Off timer Weekly timer Restriction Temp. range Operation lock Energy saving Auto return...
  • Page 82 <Main menu list> Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation. • Select a desired setting from "Off," "Low," and "High." High power Use to reach the comfortable room temperature quickly. • Units can be operated in the High-power mode for up to 30 minutes.

  • Page 83: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 12-1. HOW TO "MONITOR THE OPERATION DATA" 12-1-1. <PAR-3xMAA ("x" represents 0 or later)> Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller. Select "Service" from the Main menu, and press the button. Check menu Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Select "Check" with the F1 or F2 button, and press the button.
  • Page 84 12-2. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content Unit Remarks (Display range) Operation state Refer to 12-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0–50 Compressor-Accumulated operating time 0–9999...
  • Page 85 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 12-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 12-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 12-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 12-2-1.Detail Contents in Request Code.
  • Page 86 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 87 Description Request content Unit Remarks (Display range) Indoor-Fan operating time 0–9999 1 hour (After filter is reset) Indoor-Total operating time 0–9999 10 hours (Fan motor ON time) Indoor fan output value (Sj value) 0–255 Fan control data – For indoor fan phase control Indoor fan output value "...
  • Page 88 12-2-1. 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 89 [Fan control state] (Request code :" 53 ") Data display Fan step correction value by heat sink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control Display Correction value − (minus) − 1 [Actuator output state] (Request code :"54") Data display Actuator output state 1 Actuator output state 2...
  • Page 90 [Contact demand capacity] (Request code : " 61") Setting content Data display Display Setting value Setting content 100% [External input state] (Request code : "62") Input state : Input present Data display Contact demand Silent mode Spare 1 Spare 2 Display Input state input...
  • Page 91 [Indoor unit – Capacity setting information] (Request code : "163") Data display Display Capacity setting state Display Capacity setting state See the table on the right. 35, 36 [Wireless pair No. (indoor control board side) setting] (Request code :" 165") Data display Display Pair No.

  • Page 92: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE 13-1-1. <PAR-3xMAA ("x" represents 0 or later)> Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”. This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models. ● Reduces maintenance work drastically. ●...
  • Page 93 The operation data will appear. Smooth maintenance Ref. address Cool The Compressor-Accumulated operating (COMP. run) time is 10-hour unit, COMP. current COMP. run time and the Compressor-Number of operation times (COMP. ON/OFF) is a 100- times COMP. On / Off time unit (fractions discarded). COMP. frequency Return: Page Smooth maintenance Cool Ref.address Sub cool OU TH4 temp. OU TH6 temp.
  • Page 94 <Guide for operation condition> Check Points Inspection item Result Breaker Good Retightened Enter the temperature differences between into Terminal block Outdoor Unit Good Retightened the graph given below. Indoor Unit Good Retightened Operation state is determined according to the plotted areas on (Insulation resistance) M"...

  • Page 95: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and top panel Photo 1 Top panel fixing screws 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. (The service panel is fixed to the side panel (R) with a Service panel hook on the right side.) fixing screws (2) R emove the top panel fixing screws (3 for front and 3 for Wire grille rear/ 5 x 12) to remove the top panel. Service panel fixing screws Side panel (R) Note: When removing service panel and top panel at the...
  • Page 96 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the electrical parts box Photo 4 (1) R emove the service panel. (See Photo 1) Electrical parts box (2) R emove the top panel. (See Photo 1) Controller (3) D isconnect the power supply cable from terminal block. circuit board (4) D isconnect the indoor/outdoor connecting wire from ter- minal block. (5) D isconnect the connector CNF1 (WHT), CNF2 (WHT), Electrical parts TH3 (WHT), TH7/ 6 (RED), TH32 (BLK), 63H(YLW), box fixing screws 21S4 (GRN), LEV-A (WHT) from the controller circuit board. Terminal block <Symbols on the board>...
  • Page 97 OPERATING PROCEDURE PHOTOS/FIGURES Controller Cont. base 4. Disassembling the electrical parts box Photo 5 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) T o 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) T he reactor is attached to the rear side of the electrical...
  • Page 98 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Ambient> (TH7) Photo 11 Sensor holder (1) R emove the service panel. (See Photo 1) (2) R emove 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) L oosen the clamps for the lead wire on top of the electri- cal parts box. (6) P ull out the thermistor <Ambient> (TH7) from thermistor holder. Note: When replacing thermistor <Ambient>...
  • Page 99 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A)) Photo 13 High pressure and lead wire for high pressure switch. switch (1) R emove the electrical parts box. (See Photo 4) (2) L oosen the clamp for the lead wire on separator. [Removing the lead wire for high pressure switch] (3) D isconnect the lead wire from the high pressure switch.
  • Page 100 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the compressor (MC) Photo 14 (1) R emove the electrical parts box. (See Photo 4) (2) R emove the cover panel (front). (See Photo 1) Valve bed (3) R emove the cover panel (rear). (See Photo 1) (4) R emove the valve bed. (See photo 14) Valve bed (5) R emove the side panel (R). (See Photo 1) fixing screw (6) R emove the front panel fixing screws (5 for front/ 5x12 and 2 for front/ 4x10), then slide the front panel upward to remove it. (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 Valve fixing to the separator.)
  • Page 101 OCH679...
  • Page 102 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Published: Nov. 2017 No.OCH679 Made in Japan Specifications are subject to change without notice.

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