Mitsubishi Electric Mr.SLIM PUZ-M1 OOVKA.TH Service Manual
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Mitsubishi Electric Mr.SLIM PUZ-M1 OOVKA.TH Service Manual

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Table of Contents

SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model Name]
PUZ-M100VKA
PUZ-M100VKA-ET
PUZ-M125VKA
PUZ-M125VKA-ET
PUZ-M140VKA
PUZ-M140VKA-ET
PUZ-M100YKA
PUZ-M100YKA-ET
PUZ-M125YKA
PUZ-M125YKA-ET
PUZ-M140YKA
PUZ-M140YKA-ET
[Service Ref.]
PUZ-M100VKA.TH
PUZ-M100VKA-ET.TH
PUZ-M125VKA.TH
PUZ-M125VKA-ET.TH
PUZ-M140VKA.TH
PUZ-M140VKA-ET.TH
PUZ-M100YKA.TH
PUZ-M100YKA-ET.TH
PUZ-M125YKA.TH
PUZ-M125YKA-ET.TH
PUZ-M140YKA.TH
PUZ-M140YKA-ET.TH
R32
CONTENTS
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ···························· 2
3. SPECIFICATIONS ································· 12
4. DATA ·················································· 13
5. OUTLINES AND DIMENSIONS ················ 16
6. WIRING DIAGRAM ································ 17
7. WIRING SPECIFICATIONS ····················· 20
8. REFRIGERANT SYSTEM DIAGRAM ·········· 25
9. TROUBLESHOOTING ···························· 27
10. FUNCTION SETTING ····························· 83
12. EASY MAINTENANCE FUNCTION ··········· 99
13. DISASSEMBLY PROCEDURE ················103
PARTS CATALOG (OCB707)
July 2020
No.OCH707
REVISED EDITION-C
Revision:
• Connectable indoor units
have been added in
REVISED EDITION-C.
OCH707 REVISED EDITION-B
is void.
Note:
• This service manual
describes technical data
of the outdoor units only.

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Summary of Contents for Mitsubishi Electric Mr.SLIM PUZ-M1 OOVKA.TH

  • Page 1: Table Of Contents

    SPLIT-TYPE AIR CONDITIONERS July 2020 No.OCH707 REVISED EDITION-C SERVICE MANUAL Outdoor unit Revision: [Model Name] [Service Ref.] • Connectable indoor units PUZ-M100VKA PUZ-M100VKA.TH have been added in REVISED EDITION-C. PUZ-M100VKA-ET PUZ-M100VKA-ET.TH OCH707 REVISED EDITION-B PUZ-M125VKA PUZ-M125VKA.TH is void. PUZ-M125VKA-ET PUZ-M125VKA-ET.TH PUZ-M140VKA PUZ-M140VKA.TH Note:...

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service Model Name Service Ref. Manual No. OCH697 PLA-M35/50/60/71/100/125/140EA PLA-M35/50/60/71/100/125/140EA.UK OCB697 OCH659 PCA-M50/60/71/100/125/140KA PCA-M50/60/71/100/125/140KA OCB659 PEAD-M50/60/71/100/125/140JA(L).TH HWE16130 PEAD-M50/60/71/100/125/140JA(L) BWE017010 PEAD-M50/60/71/100/125/140JA(L).UK OCH660 PKA-M50HA(L) PKA-M50HA(L) OCB660 OCH661 PKA-M60/71/100KA(L) PKA-M60/71/100KA(L).TH OCB661 SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only.
  • Page 3 Make sure that the inside and outside of Use the following tools specifically designed for refrigerant piping is clean and it has no use with R32 refrigerant. contaminants such as sulfur, oxides, dirt, The following tools are necessary to use R32 refrigerant. shaving particles, etc., which are hazard to refrigerant cycle.
  • 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— 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. To avoid ignition, maintaining a safe work environment is required by ensuring appropriate ventilation.
  • 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: Specifications

    SPECIFICATIONS Service Ref Power supply Single phase, 230 V, 50 Hz 3-phase, 400 V, 50 Hz (phase, voltage, cycle) Max. current 26.5 11.5 External finish Munsell 3Y 7.8/1.1 Linear Expansion Valve Refrigerant control Compressor Hermetic Model SVB220FBGMT MVB33FBVMC MVB33FBVMC SVB220FBAMT MVB33FBVMC MVB33FBVMC Motor output...

  • Page 13: Data

    DATA 4-1. REFILLING REFRIGERANT CHARGE (R32: kg) Piping length (one way) Initial Service Ref. 10 m 15 m 20 m 25 m 30 m 40 m 50 m 55 m 60 m 65 m charged PUZ-M100VKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140YKA(-ET).TH Additional charge is required for pipes longer than 30 m.
  • Page 14 4-3. NOISE CRITERION CURVES PUZ-M100VKA(-ET).TH PUZ-M125VKA(-ET).TH SPL(dB) SPL(dB) MODE LINE MODE LINE PUZ-M100YKA(-ET).TH PUZ-M125YKA(-ET).TH 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 NC-20 HEARING FOR NC-20 CONTINUOUS CONTINUOUS NOISE...
  • Page 15 4-4. STANDARD OPERATION DATA PUZ-M100VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M140YKA(-ET).TH Representative matching PUZ-M100 PUZ-M125 PUZ-M140 Mode COOLING HEATING COOLING HEATING COOLING HEATING Total Capacity 11.2 12.1 13.5 13.4 15.0 input 2.71 3.01 4.01 3.63 4.96 4.39 Electrical Indoor PLA-M100EA PLA-M125EA PLA-M140EA Phase, Hz 1, 50...

  • Page 16: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUZ-M100VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M140YKA(-ET).TH Unit: mm OCH707C...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM PUZ-M100VKA(-ET).TH SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply, Indoor/Outdoor> LEV-A, LEV-B Linear Expansion Valve Switch <Function Switch> Motor for Compressor 21S4 Solenoid Valve (4-Way Valve) Switch <Model Select> Fan Motor Reactor Switch <Function Switch> High Pressure Switch CY1, CY2 Capacitor Switch <Function Switch>...
  • Page 18 PUZ-M125VKA(-ET).TH PUZ-M140VKA(-ET).TH SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply, Indoor/Outdoor> 21S4 Solenoid Valve (4-Way Valve) Switch <Model Select> Motor for Compressor DCL1, DCL2, DCL3 Reactor Switch <Function Switch> Fan Motor CY1, CY2 Capacitor Switch <Function Switch> High Pressure Switch Capacitor Switch <Function Switch>...
  • Page 19 PUZ-M100YKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140YKA(-ET).TH SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> 21S4 Solenoid Valve (4-Way Valve) Switch <Function Switch> Terminal Block <Indoor/Outdoor> ACL4 Reactor Switch <Model Select> Motor for Compressor Reactor Switch <Function Switch> Resistor Fan Motor Switch <Function Switch> High Pressure Switch CY1, CY2 Capacitor...

  • Page 20: Wiring Specifications

    WIRING SPECIFICATIONS 7-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor model name PUZ-M100/125VKA PUZ-M140VKA PUZ-M100/125/140YKA ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit power supply Outdoor unit input capacity Main switch (Breaker) 32 A 40 A 16 A...
  • Page 21 7-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES The following connection patterns are available. The outdoor unit power supply patterns vary on models. 1:1 System The optional indoor power supply terminal kit is required. A Outdoor unit power supply B Earth leakage breaker C Wiring circuit breaker or isolating switch D Outdoor unit E Indoor unit/outdoor unit connecting cords...
  • Page 22 7-3. INDOOR – OUTDOOR CONNECTING CABLE The cable shall not be lighter than design 60245 IEC or 60227 IEC. Wire No. o Size (mm²) Outdoor power supply Max. 45m Max. 50m 3 o 1.5 (polar) 3 o 2.5 (polar) Indoor unit-Outdoor unit 1 o Min 1.5 1 o Min 2.5 Indoor unit-Outdoor unit earth...
  • Page 23 7-4. 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 24 M-NET wiring (1) Use 2-core × 1.25mm² shield wire for electric wires. M-NET (Excluding the case connecting to system controller.) terminal 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 25: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUZ-M100VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M140YKA(-ET).TH Unit: mm (inch) Thermistor TH7 (Ambient) Heat exchanger Thermistor TH6 (Condenser) Stop valve 4-way valve Strainer Refrigerant GAS pipe connection [15.88 (5/8) Charge plug Distributor Muffler Charge plug High pressure switch 63H Thermistor TH3 (Liquid) Thermistor TH4...
  • Page 26 8-1. REFRIGERANT COLLECTING (PUMP DOWN) When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refriger- ant is released into the atmosphere. 1 Turn off the power supply (circuit breaker). 2 Connect the low pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit. 3 Close the liquid stop valve completely.

  • Page 27: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code display 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 28 9-2-2. 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.
  • Page 29 <Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. Error code, error unit, refrigerant address, model name, and serial number Error information will appear. Error code The model name and serial number will appear only if the information have Error unit Ref.
  • Page 30 <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 Energy saving Errors cannot be reset from this screen. Night setback Filter information Error information Main display:...
  • Page 31 9-2-3. Test run for wired remote controller <PAR-21MAA> Operating procedures While the room temperature display on the remote "TEST RUN" and the currently selected controller is “PLEASE WAIT”, the remote controller is disabled. operation mode are displayed alternately. Wait until “PLEASE WAIT” disappears before using remote controller. 1.
  • Page 32 9-2-4. Test run for wireless remote controller 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 1.0M". 1 Turn on the main power to the unit. TEST RUN TEST RUN 2 Press the...
  • Page 33 9-3. HOW TO PROCEED "SELF-DIAGNOSIS" 9-3-1. 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.
  • Page 34 9-3-2. 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"...
  • Page 35 9-3-3. Self-diagnosis <PAR-21MAA> When a problem occurs to the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display. [CHECK] and the refrigerant address are displayed on the temperature display, and the check code and unit number are displayed alternately as shown below.
  • Page 36 When the error history is reset, the display will look like the one shown below. Press the button ( in the picture in the previous page) twice ON/OFF However, if you fail to reset the error history, the error content will be displayed again. within 3 seconds.
  • Page 37 9-3-6. Self-diagnosis <Wireless remote controller> <In case of trouble during operation> 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] Refrigerant 1.
  • Page 38 • 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 Approx.
  • Page 39 9-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is ON> Checkcode Abnormal points and detection method Judgment and action Cause 1 No voltage is supplied to termi- 1 Check following items. nal block (TB1) of outdoor unit. a) Power supply breaker is a) Power supply breaker turned off.
  • Page 40 Check code Abnormal points and detection method Cause Judgment and action 1 Check disconnection or looseness or polarity 1 Contact failure or miswiring of Miswiring of indoor/outdoor unit indoor/outdoor unit connecting of indoor/outdoor unit connecting wire of connecting wire wire indoor and outdoor units.
  • Page 41 <Abnormalities detected while unit is operating> Check code Abnormal points and detection method Judgment and action Cause High pressure (High pressure switch 1 Short cycle of indoor unit 1–6 Check indoor unit and repair defect. 2 Clogged filter of indoor unit 63H operated) 3 Decreased airflow caused by Abnormal if high pressure switch 63H...
  • Page 42 Check code Abnormal points and detection method Judgment and action Cause 1 Check connection of connector (TH3, TH6/TH7) Open/short of outdoor unit thermistors 1 Disconnection or contact failure on the outdoor controller circuit board. Check (TH3, TH6, TH7, and TH8) of connectors connection of connector (CN6) on the outdoor Abnormal if open or short is detected...
  • Page 43 Check code Abnormal point and detection method Judgment and action Cause To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Detailed Refer to "9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". codes Overvoltage error 1 Abnormal increase in power source 1 Check the field facility for the power •...
  • Page 44 From the previous page. Check code Abnormal point and detection method Judgment and action Cause 12 Check the field facility for the power supply. Detailed 1 Abnormal increase in power PFC error (Overvoltage/ codes source voltage Undervoltage/Overcurrent) 2 Decrease in power source •...
  • Page 45 Check code Abnormal points and detection method Cause Judgment and action Compressor overcurrent interruption 1 Stop valve of outdoor unit is 1 Open stop valve. Abnormal if overcurrent DC bus or com- closed. pressor is detected after compressor starts 2 Decrease of power supply voltage 2 Check facility of power supply.
  • Page 46 Check code Abnormal points and detection method Judgment and action Cause Remote controller transmission error 1 Set a remote controller to main, and the (E3)/signal receiving error (E5) 1 2 remote controller are set as 1 Abnormal if remote controller could not “main.”...
  • Page 47 Check code Abnormal points and detection method Judgment and action Cause Indoor/outdoor unit communication 1 Indoor/ outdoor unit connecting 1 Check disconnection or looseness of indoor/ error (Transmitting error) (Outdoor unit) wire has contact failure. outdoor unit connecting wire. 2–4 Turn the power off, and on again to 1 Abnormal if “0”...
  • Page 48 Check code Abnormal points and detection method Judgment and action Cause 1 Check refrigerant pipes for disconnection or Abnormal refrigerant circuit 1 Disconnection of or leakage in During Cooling or Auto Cooling operation, leakage. refrigerant pipes 2 After the recovery of refrigerant, vacuum when the following are regarded as 2 Air into refrigerant piping failures when detected for one second.
  • Page 49 Check code Abnormal points and detection method Cause Judgment and action NO ACK signal Common factor that has no Always try the following when the error relation with abnormality source 1. Transmitting side controller detects “A7” occurs. 1 The unit of former address abnormal if a message was transmitted does not exist as address but there is no reply (ACK) that a...
  • Page 50 From the previous page. Check code Abnormal points and detection method Cause Judgment and action 4. If displayed address or attribute is 1 During group operation with Same as mentioned in “A7” of the previous remote controller, indoor unit detects indoor unit of multi- refrigerant page.
  • Page 51 Check code Abnormal points and detection method Cause Judgment and action 1 Transmitting condition is 1 Check transmission waveform or noise on M-NET NO RESPONSE Abnormal if a message was transmitted repeated fault because of transmission wire. and there were reply (ACK) that message noise and the like.
  • Page 52 Factor Phenomena Countermeasure 4. Even controlling by the wireless 1 The pair number settings of the wireless remote 1 Check the pair number settings. remote controller, no beep is controller and indoor controller board are mismatched. heard and the unit does not start operating.
  • Page 53 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 54 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 55 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 56 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 57 • Before repair <Frequent calls from customers> Phone Calls From Customers How to Respond Note 1 The operating display of remote 1 Check if power is supplied to air conditioner. Unit does not operate controller does not come on. Nothing appears on the display unless power is at all.
  • Page 58 Phone Calls From Customers How to Respond Note 4 A ticking sound is heard from 4 This is not a malfunction. Sound comes out the outdoor unit sometimes. This is the sound when the fan of the outdoor from the air unit is controlling the airflow amount in order to conditioner.
  • Page 59 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 is started in the room of high humidity. Water or moisture is expelled from the outdoor When pipes or piping joints are cooled, they sweat unit.
  • Page 60 9-6. HOW TO CHECK THE PARTS PUZ-M100VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M140YKA(-ET).TH Parts name Checkpoints Thermistor(TH3) Disconnect the connector then measure the resistance with a tester. <Liquid> (At the ambient temperature 10°C to 30°C) Thermistor (TH4) <Discharge> Normal Abnormal Thermistor (TH6) TH4, TH33 160 kΩ–410 kΩ...
  • Page 61 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connector (CNF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) Self check Symptom: The outdoor fan cannot turn around.
  • Page 62 9-7. 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 0°C 15 k"...
  • Page 63 Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve>...
  • Page 64 (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 65 9-8. EMERGENCY OPERATION (1) When the check codes shown below are displayed on outdoor unit or microprocessor for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) on indoor controller board to ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 66 9-9. TEST POINT DIAGRAM Outdoor controller circuit board PUZ-M100VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M140YKA(-ET).TH Manual defrost, CN51 CNDM External signal output detect history Demand control setting 1 to 2: Input of low-level sound priority mode record reset, • Compressor operating signal 1 to 3: Input of external contact point refrigerant address •...
  • Page 67 Outdoor noise filter circuit board PUZ-M100YKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140YKA(-ET).TH LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI2-LI3/LI3-LI1: 400 V AC input LI1-NI/LI2-NI/LI3-NI: 230 V AC input (Connect to the terminal block (TB1)) Connect to the elec- trical parts box CNAC1, CNAC2 230 V AC (Connect to the outdoor controller circuit board (CNAC))
  • Page 68 Outdoor power circuit board PUZ-M100VKA(-ET).TH Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUZ-M125VKA(-ET).TH Measure the resistance in the following points (connectors, etc.). PUZ-M140VKA(-ET).TH 1. Check of POWER MODULE 1 Check of DIODE circuit R - P1 , S - P1 , R - N1 , S - N1 Connect to the outdoor controller circuit board (CN2)
  • Page 69 Outdoor power circuit board PUZ-M100YKA(-ET).TH PUZ-M125YKA(-ET).TH Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUZ-M140YKA(-ET).TH Measure the resistance in the following points (connectors, etc.). 1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.
  • Page 70 Outdoor M-NET board (optional) Switch for communication LED11 LED13 display between LED12 Outdoor unit Receiving CN2M M-NET and outdoor board Transmitting connecting display Connect to M-NET Serial communication with outdoor board LED2 Energizing display of M-NET board (5V power supply) LED1 SW11 SW12...
  • Page 71 Action by the switch operation Type of Effective timing Switch Function Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery 3,4,5,6 No function — — — Power consumption SW7-1 SW7-2 (Demand switch ON) Setting of demand 0% (Operation stop)
  • Page 72 (2) Function of connector Action by open/short operation Effective timing Types Connector Function Short Open Connector CN31 Emergency operation Start Normal When power supply ON (3)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 73 <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 74 Indication Error Outdoor controller board Detailed Check Contents Inspection method reference code* LED1 (Green) LED2 (Red) page Abnormality of comp. surface 3 blinking 1 blinking 1Check if stop valves are open. P.41 thermistor(TH33) and discharge 2Check if connectors (TH4, TH33, LEV-A and LEV-B) on outdoor controller board are not disconnected.
  • Page 75 <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 Explanation for display...
  • Page 76 The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail Unit −20 to 217 Discharge temperature (TH4) −20 to 217 (When the discharge thermistor detects 100 °C or more, hundreds digit, tens digit and ones digit are displayed by turns.) °C (Example) When 105 °C;...
  • Page 77 The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail Unit −20 to 217 Discharge temperature (TH4) on error (When the temperature is 100 °C or more, the occurring −20 to 217 hundreds digit, tens digit and ones digit are displayed by turns.) °C (Example) When 130 °C;...
  • Page 78 The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail 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 79 The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail Unit Indoor setting temperature 17 to 30 17 to 30 °C 2 3 4 5 6 Outdoor 2-phase pipe (TH6) - 39 to 88 (When the temperature is 0°C or less, “–”...
  • Page 80 The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail Unit DC bus voltage 0 to 500 (PUZ-M·VKA) 0 to 500 (PUZ-M·VKA) 0 to 1000 (PUZ-M·YKA) (When it is 100 V or more, hundreds digit, tens 0 to 1000 (PUZ-M·YKA) digit and ones digit are displayed by turns.) 2 3 4 5 6...
  • Page 81 The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail Unit Indoor pipe temperature / Liquid (TH2) - 39 to 88 (When the temperature is 0 °C or less, “–” and on error occurring - 39 to 88 temperature are displayed by turns.) (Example) When -15 °C;...
  • Page 82 The black square ( ) indicates a switch position. Explanation for display Display detail Unit SW2 setting - 39 to 88 Indoor pipe temperature / Liquid (When the temperature is 0 °C or less, “–” and (TH2 (3)) temperature are displayed by turns.) °C Indoor 3 2 3 4 5 6...

  • Page 83: Function Setting

    FUNCTION SETTING 10-1. 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 84 10-1-1. 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.
  • Page 85 <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 Ref.
  • Page 86 10-1-2. Selecting functions using the wired remote controller <PAR-21MAA> First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given. For actual operations, refer to steps 1 to 0 . Setting number Refrigerant address Unit number...
  • Page 87 [Operating Procedure] 1 Check the setting items provided by function selection. If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps 2 to 7 , fill in the "Check" column in Table 1, and then change them as necessary. For initial settings, refer to the indoor unit's installation manual. 2 Switch off the remote controller.
  • Page 88 10-1-3. 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.

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

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 11-1. HOW TO "MONITOR THE OPERATION DATA" 11-1-1. 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"...
  • Page 90 11-1-2. PAR-21MAA 12-1. HOW TO "MONITOR THE OPERATION DATA" • Turn on the [Monitoring the operation data] Example) Request code "004" Discharge temperature 69°C Refrigerant address "00" A: Maintenance mode B: Refrigerant address C: Data display area D: Request code display area button for 3 seconds so that [ Maintenance mode] appears on the screen (at A ).
  • Page 91 11-2. 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 "11-2-1.Detail Contents in Request Code". – Compressor-Operating current (rms) 0 –...
  • Page 92 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to "11-2-1.Detail Contents in Request Code". Outdoor unit-Control state – Refer to "11-2-1.Detail Contents in Request Code". Compressor-Frequency control state Refer to "11-2-1.Detail Contents in Request Code". – Outdoor unit-Fan control state Refer to "11-2-1.Detail Contents in Request Code".
  • Page 93 Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays the history. (" - - " is displayed if no history is present.) Code Error history 2 (second to last) Displays the history. (" - - " is displayed if no history is present.) Code Error history 3 (third to last) Displays the history.
  • Page 94 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 –...
  • Page 95 11-2-1. Detail Contents in Request Code Example) Request code "004" Discharge temperature 69 °C Refrigerant address "00" A: Maintenance mode display B: Refrigerant address C: Data display area D: Request code display area [Operation state] (Request code : "0" ) Relay output state Power currently Data display...
  • Page 96 [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 97 [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 98 [Indoor unit – Capacity setting information] (Request code: "163" ) Data display Display Capacity setting state Display Capacity setting state See the table on the right. [Wireless pair No. (indoor control board side) setting] (Request code: " 165") Data display Display Pair No.

  • Page 99: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 12-1. SMOOTH MAINTENANCE 12-1-1. 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.
  • Page 100 12-1-2. PAR-21MAA ● Reduces maintenance work drastically. ● Enables you to check operation data of the indoor and outdoor units by remote controller. Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models. Smooth Mainte- ●...
  • Page 101 ● Data measurement When the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( ) to select the desired refrigerant address. [Screen (5) Select the type of data to be displayed. After selecting, go to step (6). Compressor information button MENU...
  • Page 102 <Guide for opration condition> Check Points 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 activating maintenance mode. Inspection item Result Classification...

  • Page 103: 13 Disassembly Procedure

    13 DISASSEMBLY PROCEDURE PUZ-M100VKA(-ET).TH PUZ-M125VKA(-ET).TH PUZ-M140VKA(-ET).TH PUZ-M100YKA(-ET).TH PUZ-M125YKA(-ET).TH PUZ-M140YKA(-ET).TH : Indicates the visible parts in the photos/figures. : Indicates the invisible 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 3 service panel fixing screws (5 ×...
  • Page 104 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES (8) Remove 2 electrical parts box fixing screws (4 × 10) and detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.
  • Page 105 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES Electrical parts box 4. Disassembling the electrical parts box (YKA type) Photo 9 (1) Disconnect all the connectors on the controller circuit board. (2) Remove the screw 1, that fix the plate equipped with the outdoor controller circuit board, and the electrical parts box.
  • Page 106 PHOTOS/FIGURES OPERATING PROCEDURE 6. Removing the thermistor <Ambient> (TH7) Thermistor <Ambient> (TH7) Photo 13 (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. (4) Loosen the 2 wire clamps on top of the electrical parts box.
  • Page 107 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing LEV coil Photo 18 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the LEV coil by sliding the coil upward. (See Photo 19) (4) Disconnect the connectors, LEV-B (RD) on the controller circuit board in the electrical parts box.
  • Page 108 OPERATING PROCEDURE PHOTOS/FIGURES 11. Removing the 4-way valve coil (21S4) Photo 20 (1) Remove the service panel. (See Photo 1) [Removing the 4-way valve coil] (2) Remove 4-way valve coil fixing screw (M5 × 6.5). (3) Remove the 4-way valve coil by sliding the coil toward you. (4) Disconnect the connector 21S4 (green) on the outdoor multi controller circuit board in the electrical parts box.
  • Page 109 OCH707C...
  • Page 110 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued: Jul. 2020 No. OCH707 REVISED EDITION-C Issued: Sep. 2019 No. OCH707 REVISED EDITION-B Issued: Apr. 2019 No. OCH707 REVISED EDITION-A Published: Dec. 2018 No. OCH707 Specifications are subject to change without notice.

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