Mitsubishi Electric PUZ-ZM100VKA Service Manual
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Mitsubishi Electric PUZ-ZM100VKA Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model Name]
PUZ-ZM100VKA
PUZ-ZM125VKA
PUZ-ZM140VKA
PUZ-ZM100YKA
PUZ-ZM125YKA
PUZ-ZM140YKA
R32
[Service Ref.]
PUZ-ZM100VKA.UK
PUZ-ZM125VKA.UK
PUZ-ZM140VKA.UK
PUZ-ZM100YKA.UK
PUZ-ZM125YKA.UK
PUZ-ZM140YKA.UK
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 ·················································· 14
6. OUTLINES AND DIMENSIONS ················ 17
7. WIRING DIAGRAM ································ 18
8. WIRING SPECIFICATIONS ····················· 20
9. REFRIGERANT SYSTEM DIAGRAM ··········· 25
10. TROUBLESHOOTING ···························· 27
11. FUNCTION SETTING ····························· 84
13. EASY MAINTENANCE FUNCTION ··········101
14. DISASSEMBLY PROCEDURE ················104
PARTS CATALOG (OCB654)
April 2017
No. OCH654

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  • Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS April 2017 No. OCH654 SERVICE MANUAL Outdoor unit [Model Name] [Service Ref.] PUZ-ZM100VKA.UK Note: PUZ-ZM100VKA • This manual describes service data of the outdoor units only. PUZ-ZM125VKA.UK PUZ-ZM125VKA PUZ-ZM140VKA.UK PUZ-ZM140VKA PUZ-ZM100YKA.UK PUZ-ZM100YKA PUZ-ZM125YKA.UK PUZ-ZM125YKA PUZ-ZM140YKA.UK...
  • Page 2 REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service Model Name Service Ref. Manual No. OCH650 PLA-ZM35/50/60/71/100/125/140EA PLA-ZM35/50/60/71/100/125/140EA.UK OCB650 PKA-M35/50HA PKA-M35/50HA OCH660 PKA-M35/50HAL PKA-M35/50HAL OCB660 PKA-M60/71/100KA PKA-M60/71/100KA.TH OCH661 PKA-M60/71/100KAL PKA-M60/71/100KAL.TH OCB661 OCH659 PCA-M35/50/60/71/100/125/140KA PCA-M35/50/60/71/100/125/140KA OCB659 PEAD-M35/50/60/71/100/125/140JA PEAD-M35/50/60/71/100/125/140JA.UK ― PEAD-M35/50/60/71/100/125/140JAL PEAD-M35/50/60/71/100/125/140JAL.UK SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only.
  • Page 3 Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. In case of using the existing pipes for R22, be careful with Vacuum pump oil may flow back into refrigerant cycle and the following: that can cause deterioration of refrigerant oil, etc. ·...
  • Page 4 [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; • recovery equipment and cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. f) Make sure that cylinder is situated on the scales before recovery takes place.
  • Page 8 [3] 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 FEATURES PUZ-ZM100VKA PUZ-ZM125VKA PUZ-ZM140VKA PUZ-ZM100YKA PUZ-ZM125YKA PUZ-ZM140YKA   CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Maximum 30 m The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver/accumulator always control the optimal refrig- erant level regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during installation often causes problems.
  • Page 13 SPECIFICATIONS PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK Service Ref. Power supply (phase, cycle, voltage) Single 50 Hz, 230 V Max. current 26.5 External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model AVB33FADMT Motor output Inverter Starter type HP switch Protection devices Comp.
  • Page 14 Service Ref. 10 m 20 m 30 m 40 m 50 m 60 m 75 m 100 m charged PUZ-ZM100VKA.UK PUZ-ZM100YKA.UK PUZ-ZM125VKA.UK PUZ-ZM125YKA.UK PUZ-ZM140VKA.UK PUZ-ZM140YKA.UK Additional charge is required for pipes longer than 30 m. 5-2. COMPRESSOR TECHNICAL DATA (at 20°C) Service Ref.
  • Page 15 5-3. NOISE CRITERION CURVES PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK PUZ-ZM100VKA.UK SPL(dB) MODE SPL(dB) LINE MODE LINE PUZ-ZM125YKA.UK COOLING COOLING PUZ-ZM100YKA.UK PUZ-ZM140YKA.UK HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR...
  • Page 16 Phase , Hz 1 , 50 1 , 50 1 , 50 Voltage Current 0.47 0.45 0.52 0.50 0.66 0.64 PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK Outdoor unit PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK Phase , Hz 1/3 , 50 1/3 , 50 1/3 , 50 230/400...
  • Page 17 OUTLINES AND DIMENSIONS PUZ-ZM100VKA.UK Unit: mm PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK OCH654...
  • Page 18 WIRING DIAGRAM PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block P.B. Power Circuit Board Switch <Pump Down> <Power Supply, Indoor/Outdoor> U/V/W Connection Terminal <U/V/W-Phase> CN31 Connector <Emergency Operation> Motor for Compressor Connection Terminal <L-Phase> CN3S Connector <Connection for Option>...
  • Page 19 PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> TB-N Connection Terminal Switch <Function Switch> Terminal Block <Indoor/Outdoor> X52CA/B 52C Relay Switch <Function Switch> Motor for Compressor N.F. Noise Filter Circuit Board Switch <Function Switch> MF1, MF2 Fan Motor LI1/LI2/LI3/NI Connection Terminal <L1/L2/L3/N-Power Supply>...
  • Page 20 WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model ZM100/125V ZM140V ZM100/125/140Y Outdoor unit power supply ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3 ph 4-wires), 50 Hz, 400 V Outdoor unit input capacity main switch (Breaker) *1 32 A 40 A 16 A...
  • Page 21 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 A Outdoor unit power supply <For models without heater> B Earth leakage breaker The optional indoor power supply terminal kit is required. C Wiring circuit breaker or isolating switch D Outdoor unit E Indoor unit/outdoor unit connecting cords...
  • Page 22 8-3. 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. 45 m Max. 50 m Max. 80 m Indoor unit-Outdoor unit 3 o 1.5 (polar) 3 o 2.5 (polar) 3 o 2.5 (polar) and S3 separated Indoor unit-Outdoor unit earth...
  • Page 23 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 24 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 25 REFRIGERANT SYSTEM DIAGRAM PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK Unit: mm (inch) Heat exchanger Thermistor TH6 Thermistor TH7 (2-phase pipe) (Ambient) Ball valve 4-way valve Strainer Refrigerant GAS pipe connection [15.88 (5/8) Muffler Distributor Charge plug (Low pressure) High pressure switch 63H...
  • Page 26 9-1. REFRIGERANT COLLECTING (PUMP DOWN) When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refrig- erant is released into the atmosphere. 1 Turn off the power supply (circuit breaker). 2 Connect the low-pressure valve on the gauge manifold to the charge plug (low-pressure side) on the outdoor unit. 3 Close the liquid stop valve completely.
  • Page 27 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 28 10-2-2. Test run for wired remote controller <PAR-3xMAA ("x" represents 0 or later)> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Test run" with the F1 or F2 button, and press the button.
  • Page 29 <Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. Check code, error unit, refrigerant address, unit model name, and serial Error information number will appear. Error code Error unit The model name and serial number will appear only if the information has 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 10-2-3. Test run for wireless remote controller (Type C) Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M". TEST RUN 1 Turn on the main power to the unit.
  • Page 32 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-3xMAA ("x" represents 0 or later)> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Select "Self check" with the F1 or F2 button, and press the button.
  • Page 33 10-3-2. Remote controller check <PAR-3xMAA ("x" represents 0 or later)> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press the button. Maintenance password Remote controller check Select "Remote controller check"...
  • Page 34 10-3-3. Self-diagnosis for wireless remote controller (Type C) When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] • "CHECK" lights, and refrigerant address 1. Press the CHECK button twice. Refrigerant "00"...
  • Page 35 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp flash pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s Approx.
  • Page 36 10-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is put on> Note: Refer to indoor unit section for codes starting with P and E. Check Code Abnormal points and detection method Case Judgment and action 1 No voltage is supplied to terminal 1 Check following items.
  • Page 37 Check Code Abnormal points and detection method Case Judgment and action Miswiring of indoor/outdoor unit 1 Contact failure or miswiring of 1 Check disconnection or looseness or connecting wire indoor/outdoor unit connecting polarity of indoor/outdoor unit connecting 1. Outdoor controller circuit board can wire wire of indoor and outdoor units.
  • Page 38 <Abnormalities detected while unit is operating> Check Code Abnormal points and detection method Case Judgment and action 1 Short cycle of indoor unit 1−6 Check indoor unit and repair defect. High pressure (High pressure switch 63H operated) 2 Clogged filter of indoor unit Abnormal if high pressure switch 63H 3 Decreased airflow caused by dirt (4.15MPa) operated during compressor...
  • Page 39 Check Code Abnormal points and detection method Case Judgment and action 1 Disconnection or contact failure of 1 Check connection of connector (TH3,TH6/TH7) Open/short of outdoor unit thermistors (TH3, TH6, TH7, and TH8) connectors on the outdoor controller circuit board. Check connection of connector (CN3) on the outdoor Abnormal if open or short is detected during Outdoor controller circuit...
  • Page 40 Check Code Abnormal points and detection method Case Judgment and action To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Detailed codes Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". Overvoltage error 1 Abnormal increase in power source 1 Check the field facility for the power supply.
  • Page 41 Check Code Abnormal points and detection method Case Judgment and action PFC error (Overvoltage/ Detailed Undervoltage/Overcurrent) codes • PFC detected any of the fol- Not applicable for ZM100–140 model. Check the switch setting for Model Select lowing: on the outdoor controller circuit board. a) Increase of DC bus voltage to 420 V.
  • Page 42 Check Code Abnormal points and detection method Case Judgment and action Low pressure 1 Stop valve of outdoor unit is 1 Check stop valve. Abnormal if the following conditions are closed during operation. detected for continuously 3 minutes after 2 Leakage or shortage of refrigerant 2 Check intake superheat.
  • Page 43 Check Code Abnormal points and detection method Case Judgment and action Remote controller control board 1 Defective remote controller 1 Replace remote controller. 1 Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board. (Check code: E1) 2 Abnormal if the clock function of remote controller cannot be normally operated.
  • Page 44 Check Code Abnormal points and detection method Case Judgment and action Indoor/outdoor unit communication error 1 Indoor/outdoor unit connecting 1 Check disconnection or looseness of (Transmitting error) (Outdoor unit) wire has contact failure. indoor/outdoor unit connecting wire. 1 Abnormal if “0” receiving is detected 30 2 Defective communication circuit of 2–4 Turn the power off, and on again to times continuously though outdoor con-...
  • Page 45 Check Code Abnormal points and detection method Case Judgment and action Pipe temperature 1 Slight temperature difference 1–4 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 46 <M-NET communication error> Note: “Indoor unit” in the text indicates M-NET board in outdoor unit. Check Code Abnormal points and detection method Case Judgment and action Address duplicate definition 1 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 47 Check Code Abnormal points and detection method Case Judgment and action NO ACK signal Common factor that has no relation Always try the following when the error with abnormality source 1. Transmitting side controller detects “A7” occurs. 1 The unit of former address does abnormal if a message was transmitted not exist as address switch has 1 Turn off the power supply of outdoor...
  • Page 48 Check Code Abnormal points and detection method Case Judgment and action 1 During group operation with 4. If displayed address or attribute is remote Same as mentioned in “A7” of the previ- indoor unit of multi- refrigerant controller, indoor unit detects abnormal- ous page.
  • Page 49 Check Code Abnormal points and detection method Case Judgment and action M-NET NO RESPONSE 1 Transmitting condition is repeated 1 Check transmission waveform or noise on Abnormal if a message was transmitted and fault because of noise and the transmission wire. there were reply (ACK) that message was like.
  • Page 50 Phenomena Factor Countermeasure 1 The pair number settings of the wireless remote 1 Check the pair number settings. 4. Even controlling by the wireless 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 51 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 52 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 53 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 54 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 55 • Before repair Frequent calling 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 56 Phone Calls From Customers How to Respond Note 1 Check the set temperature of remote controller. The room cannot be cooled or heated sufficiently. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
  • Page 57 Phone Calls From Customers How to Respond Note Something 3 Air blows out for a while after However, this control is also 3 This is not a malfunction. is wrong HEAT operation is stopped. The blower is operating just for cooling down the applied to the models which with the heated-up air conditioner.
  • Page 58 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation gets started in the room of high humidity. Water or moisture is expelled from the outdoor COOL: when pipes or piping joints are cooled, they unit.
  • Page 59 10-6. HOW TO CHECK THE PARTS PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK Parts name Check points 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>...
  • Page 60 Check method of DC fan motor (fan motor/outdoor controller circuit board) Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
  • Page 61 10-7. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 k" ± 3% B constant = 3480 ± 2% =15exp{3480( – 273+t 15 k" 4.3 k" 9.6 k" 3.0 k" 6.3 k" 5.2 k"...
  • Page 62 Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller cir- cuit board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve> Outdoor controller board 12 V DC Gray Drive circuit Orange Yellow Black Connector LEV-A LEV-B LEV-C <Output pulse signal and the valve operation>...
  • Page 63 (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 64 10-8. EMERGENCY OPERATION (1) When any check codes shown below is displayed on outdoor unit, or microcomputer for wired remote controller or indoor unit has a failure while no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 65 (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 Remarks Operation data COOL HEAT Intake temperature (TH1) 20.5: —...
  • Page 66 10-9. TEST POINT DIAGRAM Outdoor controller circuit board PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK <CAUTION> TEST POINT1 is high voltage. CNDM Manual defrost, 1 to 2: Input of low-level sound priority mode Demand control setting detect history 1 to 3: Input of external contact point...
  • Page 67 Outdoor noise filter circuit board PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : 400 V AC input LI1-NI/LI2-NI/LI3-NI : 230 V AC input (Connect to the terminal block (TB1)) CNAC1, CNAC2 230 V AC (Connect to the outdoor controller circuit board (CNAC)) Connect to the earth...
  • Page 68 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUZ-ZM100VKA.UK Measure the resistance in the following points (connectors, etc.). PUZ-ZM125VKA.UK If they are short-circuited, it means that they are broken.
  • Page 69 Outdoor power circuit board Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. PUZ-ZM100YKA.UK Measure the resistance in the following points (connectors, etc.). PUZ-ZM125YKA.UK If they are short-circuited, it means that they are broken. 1.
  • Page 70 Outdoor converter circuit board PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK L1-IN, N-IN L1-A1 CK-OU Connect to the noise filter Connect to the ACL1 Connect to the CK capacitor circuit board (LO1, NO) Connect to the outdoor power circuit board (CN7) L1-A2, L2-A2, L3-A2 L1-OU, L2-OU, L3-OU Connect to the ACL1, ACL2, ACL3 Connect to the outdoor power circuit board...
  • Page 71 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 72 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 73 (2) Function of connector Action by open/short operation Types Function Effective timing Connector Short Open Connector CN31 Start Emergency operation Normal When power supply ON 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 74 <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 75 Indication Error Outdoor controller Detailed Check board Contents Inspection method reference code *1 page LED1 (Green) LED2 (Red) 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of comp. surface thermistor (TH33) and 2Check if connectors (TH4, TH33, LEV-A, and LEV-B) P.38 discharge temperature (TH4) on outdoor controller board are not disconnected.
  • Page 76 <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 77 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit −60 to 91 Pipe temperature/Liquid (TH3) −60 to 91 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When −10:; 2 3 4 5 6 0.5 s 0.5 s −52 to 221...
  • Page 78 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit −60 to 91 Pipe temperature/Liquid (TH3) on error occurring (When the coil thermistor detects 0: or below, “–” −60 to 91 and temperature are displayed by turns.) (Example) When −15:;...
  • Page 79 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 4 The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code.
  • Page 80 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17 to 30 17 to 30 °C 2 3 4 5 6 −60 to 91 Outdoor pipe temperature/2-phase (TH6) −60 to 91 (When the temperature is 0: or less, “–” and °C temperature are displayed by turns.) 2 3 4 5 6...
  • Page 81 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit DC bus voltage 150 to 400 (ZM100–140V) 150 to 400 (ZM100–140V) 300 to 750 (ZM100–140Y) 300 to 750 (ZM100–140Y) (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 82 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit LEV-C opening pulse 0 to 480 0 to 480 (ZM140) (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.) 2 3 4 5 6 (Example) When 130 pulse;...
  • Page 83 The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting 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.) Heating = TH5−TH2...
  • Page 84 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 85 11-1-1. Selecting functions using the wired remote controller <PAR-3xMAA ("x" represents 0 or later)> <Service menu> Maintenance password is required Select "Service" from the Main menu, and press the button. Main Main menu Maintenance Initial setting *At the main display, the menu button and select "Service" to make the Service maintenance setting.
  • Page 86 <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 Ref.
  • Page 87 11-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.
  • Page 88 11-1-3. Selecting functions using the wireless remote controller <PAR-SL100A-E> 1 Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lighted and "00" blinks. (Fig. 11-1) Press the button to set the "50".
  • Page 89 11-2. FUNCTION SELECTION OF REMOTE CONTROLLER 11-2-1. <PAR-32MAA> The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen.
  • Page 90 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-Off timer Weekly timer Restriction Temp. range Operation lock Energy saving Auto return...
  • Page 91 Main menu list Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
  • Page 92 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 12-1. HOW TO "MONITOR THE OPERATION DATA" 12-1-1. <PAR-3xMAA ("x" represents 0 or later)> Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller. Select "Service" from the Main menu, and press the button. Check menu Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Select "Check"...
  • Page 93 12-2. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content Unit Remarks (Display range) Operation state Refer to 12-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0–50 Compressor-Accumulated operating time 0–9999...
  • Page 94 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. Refer to 12-2-1.Detail Contents in Request Code. Compressor-Frequency control state – Outdoor unit-Fan control state Refer to 12-2-1.Detail Contents in Request Code.
  • Page 95 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 96 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 97 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 98 [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 99 [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 100 [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 101 EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE 13-1-1. <PAR-3xMAA ("x" represents 0 or later)> Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”. This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models.
  • Page 102 The operation data will appear. Smooth maintenance Ref. address Cool The Compressor-Accumulated operating (COMP. run) time is 10-hour unit, COMP. current COMP. run time and the Compressor-Number of operation times (COMP. ON/OFF) is a 100- times COMP. On / Off time unit (fractions discarded).
  • Page 103 <Guide for operation condition> Inspection item Result Check Points Breaker Good Retightened Enter the temperature differences between into Terminal block Outdoor Unit Good Retightened the graph given below. Indoor Unit Good Retightened Operation state is determined according to the plotted areas on (Insulation resistance) M"...
  • Page 104 DISASSEMBLY PROCEDURE PUZ-ZM100VKA.UK PUZ-ZM125VKA.UK PUZ-ZM140VKA.UK PUZ-ZM100YKA.UK PUZ-ZM125YKA.UK PUZ-ZM140YKA.UK OPERATING PROCEDURE PHOTOS Photo 1 1. Removing the service panel and 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 3. Removing the electrical parts box (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. Photo 4 (V model) (4) Disconnect the indoor/outdoor connecting wire from terminal block.
  • Page 106 PHOTOS & ILLUSTRATION OPERATING PROCEDURE 4. Disassembling the electrical parts box Figure 4 (1) Disconnect all the connectors on the controller circuit board. Electrical parts box [Disassembling the electrical parts box for V model] (2) Remove the 3 screws, screw 1, 2 and 3, that fix the plate Screw 1 equipped with the outdoor controller circuit board, and the electrical parts box, screw 1, 2 and 3 from the front of...
  • Page 107 PHOTOS OPERATING PROCEDURE 5. Removing the thermistor <2-Phase Pipe> (TH6) Photo 11 (1) Remove the service panel. (See Photo 1) Cont. box top Electrical parts box (2) Remove the top panel. (See Photo 1) fixing screws (3) Disconnect the connector TH7/6 (RD) on the controller circuit board in the electrical parts box.
  • Page 108 OPERATING PROCEDURE PHOTOS 7. Removing the thermistor <Liquid> (TH3), thermistor Photo 13 <Discharge> (TH4), and thermistor <Comp. Surface> Damper (body) (TH33) (1) Remove the service panel. (See Photo 1) Separator (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector, TH3 (WH), TH4 (WH), and TH33 (BK) on the controller circuit board in the electrical parts Thermistor box.
  • Page 109 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A), Photo 15 (ZM100/125 model) LEV (B), (LEV (C)) and lead wire for high pressure switch. (1) Remove the electrical parts box. (See Photo 4 or 5) (2) Loosen the clamp for the lead wire on separator.
  • Page 110 OPERATING PROCEDURE PHOTOS 10. Removing the compressor (MC) Stop valve Photo 17 fixing screws Ball valve (1) Remove the electrical parts box. (See Photo 4 or 5) fixing screws (2) Remove the cover panel (front). (See Photo1) (3) Remove the cover panel (rear). (See Photo 1) Valve bed (4) Remove the ball valve fixing screws (2 for front/ 5x16).
  • Page 111 OPERATING PROCEDURE PHOTOS 12. Removing the reactor (DCL) (V model only) Photo 19 Screws (1) Remove the electrical parts box. (See photo 4) (2) Remove the cont. box base fixing screws (3 for front/ 4 x 10) to remove the cont. box base. (3) Disconnect the connector, DCL1 (WH) and DCL2 (WH) on the power circuit board.
  • Page 112 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Published: Apr. 2017 No.OCH654 Made in Japan Specifications are subject to change without notice.

This manual is also suitable for:

Puz-zm125vkaPuz-zm140vkaPuz-zm100ykaPuz-zm125ykaPuz-zm140yka

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