Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual
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Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual

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SERVICE MANUAL
Outdoor unit
[Model Name]
PUZ-ZM60VHA2
PUZ-ZM60VHA2-ET
PUZ-ZM60VHA2-ER
PUZ-ZM71VHA2
PUZ-ZM71VHA2-ET
PUZ-ZM71VHA2-ER
PUZ-ZM100VKA2
PUZ-ZM100VKA2-ET
PUZ-ZM100VKA2-ER
PUZ-ZM125VKA2
PUZ-ZM125VKA2-ET
PUZ-ZM125VKA2-ER
PUZ-ZM140VKA2
PUZ-ZM140VKA2-ET
PUZ-ZM140VKA2-ER
PUZ-ZM100YKA2
PUZ-ZM100YKA2-ET
PUZ-ZM100YKA2-ER
PUZ-ZM125YKA2
PUZ-ZM125YKA2-ET
PUZ-ZM125YKA2-ER
PUZ-ZM140YKA2
PUZ-ZM140YKA2-ET
PUZ-ZM140YKA2-ER
PUZ-ZM200YKA2
PUZ-ZM200YKA2-ET
PUZ-ZM200YKA2-ER
PUZ-ZM250YKA2
PUZ-ZM250YKA2-ET
PUZ-ZM250YKA2-ER
PUZ-ZM60VHA2 (-ET/-ER).UK
PUZ-ZM71VHA2 (-ET/-ER).UK
PUZ-ZM200YKA2(-ET/-ER)R1
PUZ-ZM250YKA2(-ET/-ER)R1
R32
[Service Ref.]
PUZ-ZM60VHA2.UK
PUZ-ZM60VHA2-ET.UK
PUZ-ZM60VHA2-ER.UK
PUZ-ZM71VHA2.UK
PUZ-ZM71VHA2-ET.UK
PUZ-ZM71VHA2-ER.UK
PUZ-ZM100VKA2.UK
PUZ-ZM100VKA2-ET.UK
PUZ-ZM100VKA2-ER.UK
PUZ-ZM125VKA2.UK
PUZ-ZM125VKA2-ET.UK
PUZ-ZM125VKA2-ER.UK
PUZ-ZM140VKA2.UK
PUZ-ZM140VKA2-ET.UK
PUZ-ZM140VKA2-ER.UK
PUZ-ZM100YKA2.UK
PUZ-ZM100YKA2-ET.UK
PUZ-ZM100YKA2-ER.UK
PUZ-ZM125YKA2.UK
PUZ-ZM125YKA2-ET.UK
PUZ-ZM125YKA2-ER.UK
PUZ-ZM140YKA2.UK
PUZ-ZM140YKA2-ET.UK
PUZ-ZM140YKA2-ER.UK
PUZ-ZM200YKA2.UK
PUZ-ZM200YKA2R1
PUZ-ZM200YKA2-ETR1
PUZ-ZM200YKA2-ERR1
PUZ-ZM250YKA2.UK
PUZ-ZM250YKA2R1
PUZ-ZM250YKA2-ETR1
PUZ-ZM250YKA2-ERR1
PUZ-ZM100VKA2(-ET/-ER).UK
PUZ-ZM125VKA2(-ET/-ER).UK
PUZ-ZM140VKA2(-ET/-ER).UK
PUZ-ZM100YKA2(-ET/-ER).UK
PUZ-ZM125YKA2(-ET/-ER).UK
PUZ-ZM140YKA2(-ET/-ER).UK
PUZ-ZM200YKA2.UK
PUZ-ZM250YKA2.UK
REVISED EDITION-C
Revision:
• Connectable indoor units
have been added in
REVISED EDITION-C.
OCH771B is void.
Note:
• This manual describes
service data of the outdoor
units only.
CONTENTS
1. REFERENCE MANUAL ······················· 2
2. SAFETY PRECAUTION ······················· 2
3. FEATURES ····································· 12
4. SPECIFICATIONS ···························· 13
5. DATA ·············································· 15
6. OUTLINES AND DIMENSIONS ··········· 21
7. WIRING DIAGRAM ··························· 24
8. WIRING SPECIFICATIONS ················ 29
10. TROUBLESHOOTING ······················· 38
11. FUNCTION SETTING ························ 88
BY THE REMOTE CONTROLLER ······· 89
14. DISASSEMBLY PROCEDURE ············ 99
15. REMOTE CONTROLLER ··················124
PARTS CATALOG (OCB771)
December 2022
No. OCH771

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Summary of Contents for Mitsubishi Electric PUZ-ZM200YKA2-ET

  • Page 1: Table Of Contents

    PUZ-ZM125YKA2.UK PUZ-ZM125YKA2-ET PUZ-ZM125YKA2-ET.UK PUZ-ZM125YKA2-ER PUZ-ZM125YKA2-ER.UK PUZ-ZM140YKA2 PUZ-ZM140YKA2.UK PUZ-ZM140YKA2-ET PUZ-ZM140YKA2-ET.UK PUZ-ZM140YKA2-ER PUZ-ZM140YKA2-ER.UK PUZ-ZM200YKA2 PUZ-ZM200YKA2.UK PUZ-ZM200YKA2R1 PUZ-ZM200YKA2-ET PUZ-ZM200YKA2-ETR1 PUZ-ZM200YKA2-ER PUZ-ZM200YKA2-ERR1 PUZ-ZM250YKA2 PUZ-ZM250YKA2.UK PUZ-ZM250YKA2R1 PUZ-ZM250YKA2-ET PUZ-ZM250YKA2-ETR1 PUZ-ZM250YKA2-ER PUZ-ZM250YKA2-ERR1 CONTENTS 1. REFERENCE MANUAL ······················· 2 2. SAFETY PRECAUTION ······················· 2 3. FEATURES ····································· 12 4.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service Manual No. Model Name Service Ref. Parts Catalog No. PLA-ZM35/50/60/71/100/125/140EA2 PLA-ZM35/50/60/71/100/125/140EA2.UK OCH777 PLA-ZM35/50/60/71/100/125/140EA2-ET PLA-ZM35/50/60/71/100/125/140EA2-ET.UK OCB777 PLA-ZM35/50/60/71/100/125/140EA2-ER PLA-ZM35/50/60/71/100/125/140EA2-ER.UK PLA-M35/50/60/71/100/125/140EA2 PLA-M35/50/60/71/100/125/140EA2.UK OCH783 PLA-M35/50/60/71/100/125/140EA2-ET PLA-M35/50/60/71/100/125/140EA2-ET.UK OCB783 PLA-M35/50/60/71/100/125/140EA2-ER PLA-M35/50/60/71/100/125/140EA2-ER.UK PKA-M35/50LA2 PKA-M35/50LA2.TH PKA-M35/50LA2-ET PKA-M35/50LA2-ET.TH PKA-M35/50LA2-ER PKA-M35/50LA2-ER.TH TCH068 PKA-M35/50LAL2 PKA-M35/50LAL2.TH TCB068 PKA-M35/50LAL2-ET...
  • Page 3 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R32 Precautions during the repair service. Preparation before the repair service. • Do not perform the work involving the electric parts •...
  • Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 5 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 7 b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; • the recovery process is supervised at all times by a competent person; •...
  • Page 8 [5] Service tools Use the below service tools as exclusive tools for R32 refrigerant. Tool name Specifications Gauge manifold · Only for R32 · Use the existing fitting specifications . (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·...
  • Page 9 (2) Cautions for refrigerant piping work New refrigerant R32 is adopted for replacement inverter series. Although the refrigerant piping work for R32 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 R32 is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
  • Page 10 2-4. Choosing the outdoor unit installation location R32 is heavier than air—as well as other refrigerants— Correct Correct so tends to accumulate at the base (in the vicinity of the floor). If R32 accumulates around base, it may reach a flammable concentration in case room is small.
  • Page 11 C) Create an appropriate ventilation open area. Make sure that the width of the open area is 0.9 [m] or more and the height of the open area is 0.15 [m] or more. However, the height from the bottom of the installation space to the bottom edge of the open area should be 0.125 [m] or less.

  • Page 12: Features

    Case 2: for floor standing (PSA-M) M [kg] Amin [m²] < 1.84 No requirements 1.84 h0 = 0 [m] Floor standing (PSA-M) FEATURES PUZ-ZM60VHA2(-ET/-ER).UK PUZ-ZM100VKA2(-ET/-ER).UK PUZ-ZM200YKA2(-ET/-ER)R1 PUZ-ZM71VHA2(-ET/-ER).UK PUZ-ZM250YKA2(-ET/-ER)R1 PUZ-ZM125VKA2(-ET/-ER).UK PUZ-ZM140VKA2(-ET/-ER).UK PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK PUZ-ZM200YKA2.UK PUZ-ZM250YKA2.UK CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Maximum 30 m (ZM60/71/200/250)/Maximum 40 m (ZM100/125/140) The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver/accumulator always control the optimal refrigerant level regardless of the length (30 m (ZM60/71/200/250)/40 m (ZM100/125/140) maximum and 5 m minimum)

  • Page 13: Specifications

    SPECIFICATIONS Service Ref. PUZ-ZM60VHA2(-ET/-ER).UK PUZ-ZM71VHA2(-ET/-ER).UK Power supply (phase, frequency, voltage) Single, 50Hz, 230V Max. current 19.0 External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model SVB172FFUM1 Motor output 1.25 Starter type Inverter Protection devices HP switch, Comp. surface thermo, Discharge thermo, Over current detection Crankcase heater —...
  • Page 14 Service Ref. PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK Power supply (phase, frequency, voltage) 3 phase, 50Hz, 400V Max. current 11.8 External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model DVB28FCJMT DVB36FCKMT Motor output Starter type Inverter Protection devices HP switch, Comp. surface thermo, Discharge thermo, Over current detection Crankcase heater —...

  • Page 15: Data

    DATA 5-1. REFILLING REFRIGERANT CHARGE (R32: kg) Piping length (one way) Initial Service Ref. 10 m 20 m 30 m 40 m 50 m 55 m 60 m 70 m 75 m 100 m charged — — — — PUZ-ZM60VHA2(-ET/-ER).UK —...
  • Page 16 5-3. NOISE CRITERION CURVES PUZ-ZM100VKA2(-ET/-ER).UK PUZ-ZM60VHA2(-ET/-ER).UK PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM71VHA2(-ET/-ER).UK MODE SPL(dB) LINE SPL(dB) MODE 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 CONTINUOUS CONTINUOUS NOISE NC-20 NOISE...
  • Page 17 PUZ-ZM200YKA2.UK PUZ-ZM250YKA2.UK SPL(dB) MODE LINE SPL(dB) MODE 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 CONTINUOUS CONTINUOUS NC-20 NOISE NOISE NC-20 1000 2000 4000 8000 1000...
  • Page 18 5-4. STANDARD OPERATION DATA Representative matching PLA-ZM60EA2(-ET/-ER).UK PLA-ZM71EA2(-ET/-ER).UK Mode Cooling Heating Cooling Heating Capacity 6,100 7,000 7,100 8,000 Input 1.45 1.71 1.65 1.82 Indoor unit PLA-ZM60EA2(-ET/-ER).UK PLA-ZM71EA2(-ET/-ER).UK Phase , Hz 1,50 1,50 Voltage Current 0.22 0.20 0.34 0.32 Outdoor unit PUZ-ZM60VHA2(-ET/-ER).UK PUZ-ZM71VHA2(-ET/-ER).UK Phase , Hz 1,50...
  • Page 19 Representative matching PLA-ZM100EA2(-ET/-ER).UK PLA-ZM125EA2(-ET/-ER).UK PLA-ZM140EA2(-ET/-ER).UK Mode Cooling Heating Cooling Heating Cooling Heating Capacity 9,500 11,200 12,500 14,000 13,400 16,000 Input 2.16 2.60 3.38 3.67 3.72 4.31 Indoor unit PLA-ZM100EA2(-ET/-ER).UK PLA-ZM125EA2(-ET/-ER).UK PLA-ZM140EA2(-ET/-ER).UK Phase , Hz 1,50 1,50 1,50 Voltage Current 0.47 0.45 0.52 0.50...
  • Page 20 Representative matching PLA-ZM100EA2(-ET/-ER).UK × 2 PLA-ZM125EA2(-ET/-ER).UK × 2 Mode Cooling Heating Cooling Heating Capacity 19,000 22,400 22,000 27,000 Input 4.95 5.63 6.86 7.81 Indoor unit PLA-ZM100EA2(-ET/-ER).UK PLA-ZM125EA2(-ET/-ER).UK Phase , Hz 1,50 1,50 Voltage Current 0.47 × 2 0.45 × 2 0.52 ×...

  • Page 21: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUZ-ZM60VHA2(-ET/-ER).UK Unit: mm PUZ-ZM71VHA2(-ET/-ER).UK OCH771C...
  • Page 22 PUZ-ZM100VKA2(-ET/-ER).UK Unit: mm PUZ-ZM125VKA2(-ET/-ER).UK PUZ-ZM140VKA2(-ET/-ER).UK PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK PUZ-ZM200YKA2.UK PUZ-ZM250YKA2.UK OCH771C...
  • Page 23 PUZ-ZM200YKA2(-ET/-ER)R1 Unit: mm PUZ-ZM250YKA2(-ET/-ER)R1 OCH771C...

  • Page 24: Wiring Diagram

    WIRING DIAGRAM PUZ-ZM60VHA2(-ET/-ER).UK PUZ-ZM71VHA2(-ET/-ER).UK OCH771C...
  • Page 25 PUZ-ZM100VKA2(-ET/-ER).UK OCH771C...
  • Page 26 PUZ-ZM125VKA2(-ET/-ER).UK PUZ-ZM140VKA2(-ET/-ER).UK OCH771C...
  • Page 27 PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK OCH771C...
  • Page 28 PUZ-ZM200YKA2.UK PUZ-ZM200YKA2(-ET/-ER)R1 PUZ-ZM250YKA2.UK PUZ-ZM250YKA2(-ET/-ER)R1 OCH771C...

  • Page 29: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model ZM60/71V ZM100/125V ZM140V Outdoor unit power supply ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V Outdoor unit input capacity main switch (Breaker) 25 A 32 A 40 A...
  • Page 30 Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure. 1:1 system Electrical wiring Synchronized twin, triple and quadruple system Electrical wiring • Synchronized twin Outdoor Indoor Outdoor Indoor Indoor unit...
  • Page 31 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. 1:1 System <For models without heater> A Outdoor unit power supply The optional indoor power supply terminal kit is required. B Earth leakage breaker C Wiring circuit breaker or isolating switch D Outdoor unit...
  • Page 32 Indoor unit model ZM35–140 Indoor unit power supply ~/N (single), 50 Hz, 230 V Indoor unit input capacity 16 A Main switch (Breaker) Indoor unit power supply 3 × Min 1.5 Indoor unit power supply earth 1 × Min 1.5 Indoor unit-Outdoor unit 2 ×...
  • Page 33 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.
  • Page 34 M-NET wiring (1) Use 2-core × 1.25mm² 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.

  • Page 35: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUZ-ZM60VHA2(-ET/-ER).UK PUZ-ZM71VHA2(-ET/-ER).UK Unit: mm Thermistor TH7 <Ambient> Heat exchanger Thermistor TH6 <2-phase pipe> Stop valve 4-way valve Refrigerant GAS pipe connection [15.88(5/8) Strainer Charge plug Thermistor TH3 (High pressure) Muffler <Liquid> Charge plug (Low pressure) High pressure Distributor switch 63H Thermistor TH4...
  • Page 36 PUZ-ZM200YKA2.UK Unit: mm PUZ-ZM250YKA2.UK Heat exchanger Thermistor TH6 Thermistor TH7 (2-phase pipe) (Ambient) Ball valve 4-way valve Strainer Refrigerant GAS pipe connection ø25.4 (ø 1 inch ) Muffler Distributor Charge plug (Low pressure) High pressure switch 63H Charge plug Strainer (High pressure) Thermistor TH3 #100...
  • Page 37 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. Turn off the power supply (circuit breaker). Connect the low pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit. Close the liquid stop valve completely.

  • Page 38: 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.
  • Page 39 • 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 blink pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s 0.5 s Approx.
  • Page 40 10-3. 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 Cause Judgment and action No voltage is supplied to terminal Check following items.
  • Page 41 Check Code Abnormal points and detection method Cause Judgment and action Miswiring of indoor/outdoor unit Contact failure or miswiring of Check disconnection or looseness or connecting wire indoor/outdoor unit connecting polarity of indoor/outdoor unit connecting Outdoor controller circuit board can wire wire of indoor and outdoor units.
  • Page 42 <Abnormalities detected while unit is operating> Check Code Abnormal points and detection method Cause Judgment and action High pressure (High pressure switch 63H Short cycle of indoor unit − Check indoor unit and repair defect. operated) Clogged filter of indoor unit Abnormal if high pressure switch 63H Decreased airflow caused by dirt (4.15MPa) operated during compressor...
  • Page 43 Check Code Abnormal points and detection method Cause Judgment and action Open/short of outdoor unit thermistors Disconnection or contact failure of Check connection of connector (TH3,TH6/TH7) (TH3, TH6, TH7, and TH8) connectors on the outdoor controller circuit board. Check Abnormal if open or short is detected during Outdoor controller circuit connection of connector (CN3) on the outdoor compressor operation.
  • Page 44 Check Code Abnormal points and detection method Cause 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 "10-9. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". Overvoltage error Abnormal increase in power source Check the field facility for the power supply.
  • Page 45 Check Code Abnormal points and detection method Cause Judgment and action PFC error (Overvoltage/ Detailed Undervoltage/Overcurrent) Abnormal increase in power source Check the field facility for the power codes PFC detected any of the following: voltage supply. a) Increase of DC bus voltage Decrease in power source voltage, Correct the wiring (U.V.W phase) to to 430 V.
  • Page 46 Check Code Abnormal points and detection method Cause Judgment and action Low pressure Stop valve of outdoor unit is Check stop valve. Abnormal if the following conditions are closed during operation. detected for continuously 3 minutes after Leakage or shortage of refrigerant Check intake superheat.
  • Page 47 Check Code Abnormal points and detection method Cause Judgment and action Remote controller control board Defective remote controller Replace remote controller. Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board. (Check code: E1) Abnormal if the clock function of remote controller cannot be normally operated.
  • Page 48 Check Code Abnormal points and detection method Cause Judgment and action Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) Abnormal if “0” receiving is detected 30 Indoor/outdoor unit connecting Check disconnection or looseness of times continuously though outdoor con- wire has contact failure. indoor/outdoor unit connecting wire.
  • Page 49 Check Code Abnormal points and detection method Cause Judgment and action Pipe temperature Slight temperature difference Check pipe <liquid or condenser/ <Cooling mode> between indoor room temperature evaporator> temperature with room Detected as abnormal when the pipe and pipe <liquid or condenser/ temperature display on remote controller temperature is not in the cooling range evaporator>...
  • Page 50 <M-NET communication error> Note: “Indoor unit” in the text indicates M-NET board in outdoor unit. Check Code Abnormal points and detection method Cause Judgment and action Address duplicate definition There are 2 or more same Search the unit with same address as This error is displayed when transmission address of controller of outdoor abnormality occurred.
  • Page 51 Check Code Abnormal points and detection method Cause Judgment and action NO ACK signal Always try the following when the error Common factor that has no relation with abnormality source “A7” occurs. 1. Transmitting side controller detects abnormal if a message was transmitted The unit of former address does Turn off the power supply of outdoor but there is no reply (ACK) that a...
  • Page 52 Check Code Abnormal points and detection method Cause Judgment and action Same as mentioned in “A7” of the previ- 4. If displayed address or attribute is remote During group operation with indoor unit of multi- refrigerant ous page. controller, indoor unit detects abnormal- system, if indoor unit transmits ity when indoor unit transmits signal to signal to remote controller while...
  • Page 53 Check Code Abnormal points and detection method Cause Judgment and action M-NET NO RESPONSE Transmitting condition is repeated 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.
  • Page 54 Phenomena Factor Countermeasure 4. Even controlling by the wireless The pair number settings of the wireless remote Check the pair number settings. remote controller, no beep is heard controller and indoor controller board are mismatched. and the unit does not start operating. Operation display is indicated on wireless remote controller.
  • Page 55 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 56 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 57 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 58 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller. 3 LED1: LED2: LED3: — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. 10 to 16 V DC? •...
  • Page 59 • Before repair Frequent calls from customers Phone Calls From Customers How to Respond Note Unit does The operating display of Check if power is supplied to air conditioner. not operate — remote controller does Nothing appears on the display unless power is at all.
  • Page 60 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated Check the set temperature of remote controller. sufficiently. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. —...
  • Page 61 Phone Calls From Customers How to Respond Note Something If the up/down vane is set to downward in COOL The airflow direction is is wrong with operation, it will be automatically set to horizontal blow changed during COOL the airflow by the microprocessor in order to prevent water from operation.
  • Page 62 10-5. HOW TO CHECK THE PARTS Checkpoints Parts name Disconnect the connector then measure the resistance with a tester. Thermistor (TH3) (At the ambient temperature 10 to 30°C) <Liquid> Thermistor (TH4) Normal Abnormal <Discharge> Thermistor (TH6) TH4, TH33 160 to 410 kΩ <2-phase pipe>...
  • Page 63 Check method of DC fan motor (fan motor/outdoor multi controller circuit board) Notes · High voltage is applied to the connector (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 multi controller circuit board and fan motor.) Self-check Symptom: The outdoor fan cannot rotate.
  • Page 64 10-6. 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 kΩ ± 3% B constant = 3480 ± 1% =15exp{3480( – 273+t 0°C 15 kΩ...
  • Page 65 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>...
  • Page 66 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 67 10-7. 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.
  • Page 68 (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 —...
  • Page 69 10-8. TEST POINT DIAGRAM Outdoor controller circuit board CNDM <CAUTION> TEST POINT is high voltage. Manual defrost, Demand control setting to : Input of low-level sound priority mode detect history to : Input of external contact point CN51 record reset, External signal output refrigerant address •...
  • Page 70 Outdoor noise filter circuit board PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK LI1, LI2, LI3, NI PUZ-ZM200YKA2.UK POWER SUPPLY PUZ-ZM250YKA2.UK LI1-LI2/LI-LI3/LI3-LI1: 400 V AC input PUZ-ZM200YKA2(-ET/-ER)R1 LI1-NI/LI2-NI/LI3-NI: 230 V AC input (Connect to the terminal block (TB1)) PUZ-ZM250YKA2(-ET/-ER)R1 Connect to the earth CNAC1, CNAC2 230 V AC (Connect to the outdoor controller...
  • Page 71 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). PUZ-ZM60VHA2(-ET/-ER).UK 1. Check of POWER MODULE PUZ-ZM71VHA2(-ET/-ER).UK Check of DIODE circuit PUZ-ZM100VKA2(-ET/-ER).UK R - L1 , S - L1 , R - N1 , S - N1 Check of IGBT circuit PUZ-ZM125VKA2(-ET/-ER).UK...
  • Page 72 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUZ-ZM100YKA2(-ET/-ER).UK Measure the resistance in the following points (connectors, etc.). PUZ-ZM125YKA2(-ET/-ER).UK 1. Check of DIODE MODULE PUZ-ZM140YKA2(-ET/-ER).UK L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.
  • Page 73 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUZ-ZM200YKA2.UK Measure the resistance in the following points (connectors, etc.). PUZ-ZM200YKA2(-ET/-ER)R1 1. Check of DIODE MODULE PUZ-ZM250YKA2.UK L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 PUZ-ZM250YKA2(-ET/-ER)R1 2.
  • Page 74 Outdoor converter circuit board PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK L1-IN, N-IN Connect to the noise filter CK-OU L1-A1 circuit board (LO1, NO) Connect to the CK capacitor Connect to the ACL1 Connect to the outdoor power circuit board (CN7) L1-A2, L2-A2, L3-A2 L1-OU, L2-OU, L3-OU Connect to the ACL1, ACL2, ACL3 Connect to the outdoor power circuit board...
  • Page 75 Outdoor M-NET board (optional) Switch for communication LED11 LED13 LED12 display between Outdoor unit CN2M Receiving Transmitting connecting display M-NET and outdoor board Connect to M-NET Serial communication with outdoor board LED2 Energizing display of M-NET board (5V power supply) SW11 SW12 Power supply (5V/12V) input...
  • Page 76 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 * 3,4,5 No function — — — No function —...
  • Page 77 (2) Function of connector Action by open/short operation Types Function Effective timing Connector 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.
  • Page 78 <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.
  • Page 79 Indication Error Detailed Outdoor controller reference Check board Contents Inspection method page code LED1 (Green) LED2 (Red) 3 blinking 1 blinking Abnormality of comp. surface Check if stop valves are open. thermistor (TH33) and P. 42 Check if connectors (TH4, TH33, LEV-A, and LEV-B) discharge temperature (TH4) on outdoor controller board are not disconnected.
  • Page 80 <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...
  • Page 81 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) −60 to 91 −60 to 91 (When the coil thermistor detects 0°C or below, “–” and temperature are displayed by turns.) °C (Example) When −10°C;...
  • Page 82 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Pipe temperature/Liquid (TH3) on error −60 to 91 occurring (When the coil thermistor detects 0°C or below, “–” −60 to 91 and temperature are displayed by turns.) °C (Example) When −15°C;...
  • Page 83 The black square ( ) indicates a switch position. Display detail Explanation for display SW2 setting 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.
  • Page 84 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Indoor setting temperature 17 to 30 17 to 30 °C 2 3 4 5 6 Outdoor pipe temperature/2-phase (TH6) −60 to 91 −60 to 91 (When the temperature is 0°C or less, “–”...
  • Page 85 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting DC bus voltage 150 to 400 (ZM60–140V) 150 to 400 (ZM60–140V) 300 to 750 (ZM100–250Y) 300 to 750 (ZM100–250Y) (When it is 100 V or more, hundreds digit, tens digit and ones digit are displayed by turns.) 2 3 4 5 6 0 to 100...
  • Page 86 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting LEV-C opening pulse 0 to 480 0 to 480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130 pulse;...
  • Page 87 The black square ( ) indicates a switch position. Display detail SW2 setting Explanation for display Unit Sub cool on error occurring SC 0 to 130 0 to 130 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by Cooling = TH6−TH3 turns.) °C...

  • Page 88: 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>...

  • Page 89: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 12-1. HOW TO "MONITOR THE OPERATION DATA" Refer to "15-10. REQUEST CODE" when monitoring the operation data. 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...
  • Page 90 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 91 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 92 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 93 12-2-1. Detail Contents in Request Code [Operation state] (Request code :" 0") Relay output state Power currently Data display Display Compressor 4-way valve Solenoid valve supplied to compressor – – – – Relay output state Operation mode Operation mode Display Operation mode STOP •...
  • Page 94 [Fan control state] (Request code :" 53 ") Data display Fan step correction value by heatsink 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 95 [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 position Data display Contact demand Silent mode Spare 1 Spare 2 Display Input state input...
  • Page 96 [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 97: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE 13-1-1. <PAR-4xMAA ("x" represents 0 or later)> Refer to "15-9. SMOOTH MAINTENANCE" for operation procedure. 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.
  • Page 98 <Guide for operation condition> Checkpoints Enter the temperature differences between into the graph given below. Operation state is determined according to the plotted areas on the graph. For data measurements, set the fan speed to "Hi" before activat ing maintenance mode. Inspection item Result Classification...

  • Page 99: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUZ-ZM60VHA2(-ET/-ER) PUZ-ZM71VHA2(-ET/-ER) : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES Photo 1 1. Removing the service panel and top panel Top panel fixing screws (1) Remove 3 service panel fixing screws (5 × 12) and slide Top panel the hook on the right downward to remove the service panel.
  • Page 100 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the thermistor <2-phase pipe> (TH6) and Photo 5 thermistor <Liquid> (TH3) Thermistor (1) Remove the service panel. (See Photo 1) <2-phase pipe>(TH6) (2) Remove the top panel. (See Photo 1) Electrical parts box (3) Disconnect the connector TH7/6 (red) and TH3 (white) on the controller circuit board in the electrical parts box.
  • Page 101 OPERATING PROCEDURE PHOTOS/FIGURES Photo 8 7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A), LEV(B)) 4-way valve coil 4-way valve (1) Remove the service panel. (See Photo 1) fixing screw (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 4) [Removing the 4-way valve coil] (4) Remove 4-way valve coil fixing screw (M5 ×...
  • Page 102 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the high pressure switch (63H) Photo 10 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Lead wire of (3) Remove the electrical parts box. (See Photo 4) high pressure switch (4) Remove 3 right side panel fixing screws (5 ×...
  • Page 103 OPERATING PROCEDURE PHOTOS/FIGURES 12. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See Photo 1) Stop valve Ball valve (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and Valve bed remove the front cover panel.
  • Page 104 PUZ-ZM100VKA2(-ET/-ER).UK PUZ-ZM125VKA2(-ET/-ER).UK PUZ-ZM140VKA2(-ET/-ER).UK PUZ-ZM100YKA2(-ET/-ER).UK PUZ-ZM125YKA2(-ET/-ER).UK PUZ-ZM140YKA2(-ET/-ER).UK : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and top panel Photo 1 Top panel fixing screws Top panel (1) Remove the service panel fixing screws (4 for front/ 5 x 12), then slide the service panel downward to remove it.
  • Page 105 OPERATING PROCEDURE PHOTOS/FIGURES (V model) Photo 4 3. Removing the electrical parts box 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. Controller circuit board (4) Disconnect the indoor/outdoor connecting wire from ter-...
  • Page 106 OPERATING PROCEDURE PHOTOS/FIGURES 4. Disassembling the electrical parts box (V model) Electrical parts box (1) Disconnect all the connectors on the controller circuit Photo 6 board. [Disassembling the electrical parts box for V model] (2) Remove the 3 screws, screw , that fix the Screw plate equipped with the outdoor controller circuit board.
  • Page 107 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the thermistor <2-Phase Pipe> (TH6) Photo 12 Electrical parts box (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (RD) on the controller circuit board in the electrical parts box.
  • Page 108 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the thermistor <Liquid> (TH3), thermistor Photo 14 <Discharge> (TH4), and thermistor <Comp. Surface> Damper (body) (TH33) Thermistor clip (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Separator (3) Disconnect the connector, TH3 (WH), TH4 (WH), and TH33 (YE) on the controller circuit board in the electrical parts box.
  • Page 109 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A), Photo 16 LEV (B)), and lead wire for high pressure switch. (1) Remove the electrical parts box. (See Photo 4 or 5) High pressure (2) Loosen the clamp for the lead wire on separator. LEV A switch [Removing the lead wire for high pressure switch]...
  • Page 110 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the compressor (MC) Photo 17 Stop valve Ball valve fixing screws fixing screws (1) Remove the electrical parts box. (See Photo 4 or 5) (2) Remove the cover panel (front). (See Photo1) Valve bed (3) Remove the cover panel (rear). (See Photo 1) (4) Remove the ball valve fixing screws (2 for front/ 5x16).
  • Page 111 OPERATING PROCEDURE PHOTOS/FIGURES 12. Removing the reactor (DCL) (V model only) Photo 19 Screws (1) Remove the electrical parts box. (See photo 4) (100V) (2) Remove the cont. box base fixing screws (3 for front/ 4 x 10) to remove the cont box base. Electrical (3) Disconnect the connector, DCL on the power circuit parts box...
  • Page 112 PUZ-ZM200YKA2.UK PUZ-ZM250YKA2.UK : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and top panel Photo 1 Top panel fixing screws Top panel (1) Remove the service panel fixing screws (4 for front/ 5 x 12), then slide the service panel downward to remove it.
  • Page 113 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the electrical parts box Photo 4 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Electrical parts box (3) Disconnect the power supply cable from terminal block. Controller (4) Disconnect the indoor/outdoor connecting wire from ter- circuit board minal block.
  • Page 114 OPERATING PROCEDURE PHOTOS/FIGURES 4. Disassembling the electrical parts box Photo 5 Controller 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) and clip.
  • Page 115 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Ambient> (TH7) Photo 11 Lead wire of thermistor <Ambient> (TH7) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (RD) on the controller circuit board in the electrical parts box.
  • Page 116 OPERATING PROCEDURE PHOTOS/FIGURES Photo 13 8. Removing the 4-way valve coil (21S4), LEV coil (LEV(A)/ LEV(B)) and lead wire for high pressure switch. (1) Remove the electrical parts box. (See Photo 4) (2) Loosen the clamp for the lead wire on separator. [Removing the lead wire for high pressure switch] High pressure (3) Disconnect the lead wire from the high pressure switch.
  • Page 117 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the compressor (MC) Photo 14 (1) Remove the service panel. (See Photo 1) Ball valve fixing (2) Remove the top panel. (See Photo 1) Stop valve screws (3) Remove the electrical parts box. (See Photo 4) fixing screws Valve bed (4) Remove the cover panel (front).
  • Page 118 PUZ-ZM200YKA2R1 PUZ-ZM200YKA2-ETR1 PUZ-ZM200YKA2-ERR1 PUZ-ZM250YKA2R1 PUZ-ZM250YKA2-ETR1 PUZ-ZM250YKA2-ERR1 : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES Photo 1 1. Removing the service panel and top panel Top panel fixing screws Top panel (1) Remove the service panel fixing screws (3 for front/ 5 x 12), then slide the service panel downward to remove it.
  • Page 119 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the electrical parts box Photo 4 (1) Remove the service panel. (See Photo 1) Electrical parts box (2) Remove the top panel. (See Photo 1) Controller (3) Disconnect the power supply cable from terminal block. circuit board (4) Disconnect the indoor/outdoor connecting wire from ter- minal block.
  • Page 120 OPERATING PROCEDURE PHOTOS/FIGURES 4. Disassembling the electrical parts box Photo 5 Controller 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) and clip. (Photo 5) (The cont.
  • Page 121 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Ambient> (TH7) Photo 11 Sensor holder (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (RED) on the controller circuit board in the electrical parts box. (See Photo 4) (4) Loosen the fastener for the lead wire in the electrical parts box.
  • Page 122 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the 4-way valve coil (21S4), LEV coil (LEV(A)/ Photo 13 LEV(B)) and lead wire for high pressure switch. High pressure (1) Remove the electrical parts box. (See Photo 4) switch (2) Loosen the clamp for the lead wire on separator. [Removing the lead wire for high pressure switch] LEV coil (3) Disconnect the lead wire from the high pressure switch.
  • Page 123 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the compressor (MC) Photo 14 (1) Remove the electrical parts box. (See Photo 4) Ball valve fixing (2) Remove the cover panel (front). (See Photo 1) Stop valve screws (3) Remove the cover panel (rear). (See Photo 1) fixing screws Valve bed (4) Remove the valve bed.

  • Page 124: Remote Controller

    REMOTE CONTROLLER 15-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAA> Controller interface 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.
  • Page 125 Display The main display can be displayed in two different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
  • Page 126 Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See sensor Timer menu Timer ON/OFF timer Auto-OFF timer Weekly timer...
  • Page 127 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
  • Page 128 Main menu list Main Setting and display items Setting details menu Operation Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting. Use to turn ON/OFF the louver. • Select a desired setting from ˝ON˝ and ˝OFF.˝ Use to set the amount of ventilation.
  • Page 129 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
  • Page 130 <PAR-SL97A-E> Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed) Timer Off button...
  • Page 131 <PAR-SL100A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
  • Page 132 15-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, date and time of occur- Error information rence, model name, and serial number will appear. Error code The model name and serial number will appear only if the informa- Error unit...
  • Page 133 • Checking the error information Maintenance menu While no errors are occurring, page 2/2 of the error information can be Error information viewed by selecting ˝Error information˝ from the Maintenance menu. Filter information Errors cannot be reset from this screen. Cleaning Main menu: Cursor...
  • Page 134 15-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make the maintenance setting. Service 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
  • Page 135 15-4. TEST RUN 15-4-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Select ˝Test run˝ with the F1 or F2 button, and press the [ Others ] button. 2.
  • Page 136 15-4-2. PAR-SL97A-E Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN 2.
  • Page 137 15-5. FUNCTION SETTING 15-5-1. PAR-41MAA Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Select ˝Function setting˝, and press the [ ] button.
  • Page 138 15-5-2. PAR-SL97A-E 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.
  • Page 139 15-5-3. 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 lit and ˝00˝ blinks. (Fig. 1) Press the button to set the ˝50˝. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
  • Page 140 15-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. Select ˝Error history˝ with the F1 or F2 button, and press the [ ] button.
  • Page 141 5. Preliminary error history Preliminary error history Error Unt# dd/mm/yy Select "Preliminary error history" from the Error history menu, and press the [ ] button. 32 preliminary error history records will appear. Error history menu: Page Delete 4 records are shown per page, and the top record on the first page indi- cates the latest error record.
  • Page 142 15-7. SELF-DIAGNOSIS 15-7-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [ ] button. Service menu: Select ˝Diagnosis˝ from the Check menu, Cursor and press the [ ] button.
  • Page 143 15-7-2. PAR-SL97A-E 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> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK •...
  • Page 144 15-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select ˝Service˝ from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, and press the [ ] button.
  • Page 145 15-9. SMOOTH MAINTENANCE 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Check menu Error history Diagnosis Smooth maintenance Request code Select ˝Check˝ with the F1 or F2 button, and press the [ ] button. Service menu: Cursor Select ˝Smooth maintenance˝...
  • Page 146 ■ Refrigerant address Single refrigerant system Multi refrigerant system (group control) In the case of single refrigerant system, the refrigerant address Up to 16 refrigerant systems (16 outdoor units) can be con- is ˝00˝ and no operation is required. nected as a group by 1 remote controller. To check or set the Simultaneous twin, triple units belong to this category refrigerant addresses.
  • Page 147 OCH771C...
  • Page 148 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN ©Copyright 2021 MITSUBISHI ELECTRIC CORPORATION Issued: Dec. 2022 No.OCH771 REVISED EDITION-C Issued: Aug. 2022 No.OCH771 REVISED EDITION-B Issued: May 2022 No.OCH771 REVISED EDITION-A Published: Sep. 2021 No.OCH771 Made in Japan...
  • Page 149 Related Links Model Number: PUZ-ZM250YKA2 I.T. Cooling Brochure PUZ-(Z)M200250YKA2 Declaration of Conformity PUZ-M(Z)200-250YKA2 Installation Manual PUZ-ZM60-250(V)(Y)KA2 Service Manual (OCH771C) s-MEXT-G00 DX Product Information Sheet...

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