Mitsubishi Electric PUZ-ZM35VKA Service Manual
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Mitsubishi Electric PUZ-ZM35VKA Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

Outdoor unit
[Model Name]
PUZ-ZM35VKA
PUZ-ZM50VKA
PUZ-ZM60VHA
PUZ-ZM71VHA
PUZ-ZM35VKA
PUZ-ZM50VKA
[Service Ref.]
PUZ-ZM35VKA
PUZ-ZM50VKA
PUZ-ZM60VHA
PUZ-ZM71VHA
R32
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 ······································ 19
8. WIRING SPECIFICATIONS ·························· 21
9. REFRIGERANT SYSTEM DIAGRAM ············· 26
10. TROUBLESHOOTING ·································· 28
11. FUNCTION SETTING ··································· 83
13. EASY MAINTENANCE FUNCTION ··········· 100
14. DISASSEMBLY PROCEDURE ··················· 102
PARTS CATALOG (OCB653)
April 2017
No. OCH653
Note:
• This manual describes service
data of the outdoor units only.

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Summary of Contents for Mitsubishi Electric PUZ-ZM35VKA

  • Page 1: Service Manual

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS April 2017 No. OCH653 SERVICE MANUAL Outdoor unit [Model Name] [Service Ref.] PUZ-ZM35VKA PUZ-ZM35VKA Note: • This manual describes service data of the outdoor units only. PUZ-ZM50VKA PUZ-ZM50VKA PUZ-ZM60VHA PUZ-ZM60VHA PUZ-ZM71VHA PUZ-ZM71VHA CONTENTS 1. REFERENCE MANUAL ································· 2 2. SAFETY PRECAUTION ································· 2 3. FEATURES ··················································· 12 4. SPECIFICATIONS ········································ 13 5.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service Model Name Service Ref. Manual No. OCH650 PLA-ZM35/50/60/71EA PLA-ZM35/50/60/71EA.UK OCB650 PKA-M60/71KA PKA-M60/71KA.TH OCH661 PKA-M60/71KAL PKA-M60/71KAL.TH OCB661 PKA-M35/50HA PKA-M35/50HA OCH660 PKA-M35/50HAL PKA-M35/50HAL OCB660 OCH659 PCA-M35/50/60/71KA PCA-M35/50/60/71KA OCB659 PEAD-M35/50/60/71JA PEAD-M35/50/60/71JA.UK ― PEAD-M35/50/60/71JAL PEAD-M35/50/60/71JAL.UK SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only.
  • Page 3 Use the following tools specifically designed for Make sure that the inside and outside of refrige- use with R32 refrigerant. rant piping is clean and it has no contaminants The following tools are necessary to use R32 refrigerant. such as sulfur, oxides, dirt, 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. For repair to the refrigerating systems, (1-3) to (1-7) shall be completed prior to conducting work on the systems. (1-2) Work Procedure Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor being present while the work is being performed. (1-3) General Work Area All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the con- ditions within the area have been made safe by control of flammable material.
  • 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. The test apparatus shall be at the correct rating. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak. (4) Cabling Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans. (5) Detection of Flammable Refrigerants Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used. (6) Leak Detection Methods Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants, the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equip- ment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate percentage of gas (25% maximum) is confirmed. Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. If a leak is suspected, all naked flames shall be removed/extinguished. If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak. For appliances containing flammable refrigerants, oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing pro- cess. (7) Removal and Evacuation When breaking into the refrigerant circuit to make repairs – or for any other purpose conventional procedures shall be used. However, for flammable refrigerants it is important that best practice is followed since flammability is a considera- tion. The following procedure shall be adhered to: • remove refrigerant • purge the circuit with inert gas • evacuate • purge again with inert gas • open the circuit by cutting or brazing. The refrigerant charge shall be recovered into the correct recovery cylinders. For appliances containing flammable refrig- erants, the system shall be “flushed” with OFN to render the unit safe. This process may need to be repeated several times. Compressed air or oxygen shall not be used for purging refrigerant systems. For appliances containing flammable refrigerants, flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum. This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used,...
  • 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. g) Start the recovery machine and operate in accordance with manufacturer’s instructions. h) Do not overfill cylinders. (No more than 80 % volume liquid charge). i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equip- ment are removed from site promptly and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked. (10) Labelling Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. For appliances containing flammable refrigerants, ensure that there are labels on the equipment stat- ing the equipment contains flammable refrigerant. (11) Recovery When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrig- erant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs. The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of all appropriate refrigerants including, when applicable, flammable refriger- ants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be com- plete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt. The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders. If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning...
  • 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 · Only for R32 · Use pressure performance of 5.09MPa·G or over. Electronic scale — Gas leak detector · Use the detector for R134a, R407C, R410a or R32. Adaptor for reverse flow check · Attach on vacuum pump. Refrigerant charge base — Refrigerant cylinder · Only for R32 · Cylinder with syphon Refrigerant recovery equipment — 2-3. PRECAUTIONS WHEN REUSING EXISTING R22/R410a REFRIGERANT PIPES (1) Flowchart • Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter dryer.
  • Page 9 (2) Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different. 1 Thickness of pipes Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7 mm or below.) Diagram below: Piping diameter and thickness Thickness (mm) Nominal Outside dimensions(inch) diameter (mm) R32/R410a 6.35 9.52 12.70 15.88 — 19.05 2 Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refriger- ants. Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R410A has been speci- fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes. Use torque wrench corresponding to each dimension. Dimension A Dimension B Flare cutting dimensions...
  • 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. If a refrigerant leak is confirmed in a room or an area where there is insufficient ventilation, refrain from using of flames until the work environment can be improved by ensuring appropriate ventilation. Install outdoor units in a place where at least one of the four sides is open, and in a sufficiently large space with- out depressions. 2-5. Minimum installation area If you unavoidably install a unit in a space where all four sides are blocked or there are depressions, confirm that one of these situations (A, B or C) is satisfied. Note: These countermeasures are for keeping safety not for specification guarantee. A) Secure sufficient installation space (minimum installation area Amin). Install in a space with an installation area of Amin or more, corresponding to refrigerant quantity M (factory-charged refrigerant + locally added refrigerant). M [kg] Amin [m²] Amin B) Install in a space with a depression height of [ 0.125 [m] Height from the bottom of Height from the bottom of 0.125 [m] or less 0.125 [m] or less...
  • 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. Open area should be 75% or more opening. 75% or more opening Height H 0.15 [m] or more Width W 0.9 [m] or more Height from the bottom 0.125 [m] or less ■ Indoor units Install in a room with a floor area of Amin or more, corresponding to refrigerant quantity M (factory-charged refrig- erant + locally added refrigerant). * For the factory-charged refrigerant amount, refer to the spec nameplate or installation manual. For the amount to be added locally, refer to the installation manual. Install the indoor unit so that the height from the floor to the bottom of the indoor unit is h0; for wall mounted: 1.8 m or more; for ceiling suspended, cassette and ceiling concealed: 2.2 m or more. * There are restrictions in installation height for each model, so read the installation manual for the particular unit. M [kg] Amin [m²] h0 ] 1.8 [m] Wall mounted...

  • Page 12: Features

    FEATURES PUZ-ZM35VKA PUZ-ZM60VHA PUZ-ZM50VKA PUZ-ZM71VHA CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT Maximum 30 m (PUZ-ZM35–71) The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver always control the optimal refrigerant level regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during instal- lation often causes problems. It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time.

  • Page 13: Specifications

    SPECIFICATIONS PUZ-ZM35VKA PUZ-ZM50VKA Service Ref. Cooling Heating Cooling Heating Mode Single, 50Hz, 230V Power supply (phase, cycle, voltage) Max. current Munsell 3Y 7.8/1.1 External finish Refrigerant control Linear Expansion Valve Compressor Hermetic Model SVB140FFSM SVB140FFSM Motor output Inverter Starter type...

  • Page 14: 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 75 m charged PUZ-ZM35VKA 2.15 — — PUZ-ZM50VKA PUZ-ZM60VHA — PUZ-ZM71VHA Additional charge is required for pipes longer than 30 m. 5-2. COMPRESSOR TECHNICAL DATA (at 20:) PUZ-ZM35VKA PUZ-ZM60VHA Service Ref. PUZ-ZM50VKA PUZ-ZM71VHA...

  • Page 15: Noise Criterion Curves

    5-3. NOISE CRITERION CURVES SPL(dB) SPL(dB) MODE LINE MODE LINE PUZ-ZM35VKA PUZ-ZM60VHA COOLING COOLING PUZ-ZM50VKA PUZ-ZM71VHA HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE THRESHOLD OF APPROXIMATE HEARING FOR NC-20 THRESHOLD OF CONTINUOUS HEARING FOR...

  • Page 16: Standard Operation Data

    1 , 50 1 , 50 Voltage Current 0.21 0.19 0.22 0.20 0.22 0.20 0.34 0.32 Outdoor unit PUZ-ZM35VKA PUZ-ZM50VKA PUZ-ZM60VHA PUZ-ZM71VHA Phase , Hz 1 , 50 1 , 50 1 , 50 1 , 50 Voltage Current 5.66 6.77 3.17...

  • Page 17: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUZ-ZM35VKA PUZ-ZM50VKA Unit: mm (inch) OCH653...
  • Page 18 PUZ-ZM60VHA PUZ-ZM71VHA Unit: mm (inch) OCH653...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM PUZ-ZM35VKA PUZ-ZM50VKA OCH653...
  • Page 20 PUZ-ZM60VHA PUZ-ZM71VHA OCH653...

  • Page 21: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model ZM35/50V ZM60/71V Outdoor unit power supply ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V Outdoor unit input capacity main switch (Breaker) *1 16 A 25 A Outdoor unit power supply 3 × Min. 1.5 3 × Min. 2.5 Indoor unit-Outdoor unit 3 × 1.5 (Polar) 3 × 1.5 (Polar) Indoor unit-Outdoor unit earth 1 × Min. 1.5 1 × Min. 1.5 Remote controller-Indoor unit 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) Outdoor unit L-N (single) 230 V AC 230 V AC Outdoor unit L1-N, L2-N, L3-N (3 phase) Indoor unit-Outdoor unit S1-S2 230 V AC 230 V AC Indoor unit-Outdoor unit S2-S3 24 V DC 24 V DC Remote controller-Indoor unit 12 V DC...
  • Page 22 8-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES The following illustration show available connection patterns. The outdoor unit power supply patterns vary on models. 1:1 System 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 23 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 3 o 1.5 (polar) 3 o 2.5 (polar) 3 o 2.5 (polar) and S3 separated Indoor unit-Outdoor unit...
  • Page 24 8-4. M-NET WIRING METHOD Points to note: (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5 cm. Do not put them in the same conduit tube. (2) Terminal block (TB7) for transmission wires should never be connected to 220–240 V power supply. If it is connected, electronic parts on M-NET P.C. board may burn out. (3) Use 2-core × 1.25mm² shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this because this may cause a malfunction. Refrigerant Refrigerant Refrigerant Centralized address 00 address 00 address 00 controller M-NET M-NET M-NET address 01 address 02 address 03 Power supply unit A-control A-control A-control remote remote...
  • Page 25 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. Transmission Shield (3) In the system which several outdoor units are being connected, the terminal (A, B, wire part S) on M-NET terminal block should be individually wired to the other outdoor unit’s terminal, i.e. A to A, B to B and S to S. In this case, choose one of those outdoor units and drive a screw to fix an earth wire on the plate as shown on the right figure. 8-4-1. M-NET address setting In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group. <Setting example> M-NET Address No. Address number can be set by using rotary switches (SW11 for 1s digit and SW12 for 10s digit), which SW11 is located on the M-NET board of outdoor unit. Switch digit setting (Initial setting: all addresses are set to “0”.) SW12 digit...

  • Page 26: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit: mm (inch) PUZ-ZM35VKA PUZ-ZM50VKA Thermistor TH7 Heat exchanger <Ambient> Stop valve Thermistor TH6 Charge plug Solenoid valve (with service port) <2-phase pipe> (4-way valve) Refrigerant GAS pipe connection(1/2F) Strainer Thermistor TH3 <Liquid> Muffler Distributor High pressure...
  • Page 27 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 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. 4 Supply power (circuit breaker). • When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CEN- TRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally. • Start-up of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned on. 5 Perform the refrigerant collecting operation (cooling test run). • P ush the pump-down SWP switch (push-button type) on the control board of the outdoor unit. The compressor and ventilators (indoor and outdoor units) start operating (refrigerant collecting operation begins). (LED1 and LED2 on the control board of the outdoor unit are lit.) • O nly push the pump-down SWP switch if the unit is stopped. However, even if the unit is stopped and the pump-down SWP switch is pushed less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed. Wait until the compressor has been stopped for 3 minutes and then push the pump-down SWP switch again. 6 F ully close the ball valve on the gas pipe side of the outdoor unit when the pressure gauge on the gauge manifold shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm²) and quickly stop the air conditioner. • Because the unit automatically stops in about 3 minutes when the refrigerant collecting operation is completed (LED1 off, LED2 lit), be sure to quickly close the gas ball valve. However, if LED1 is lit, LED2 is off, and the unit is stopped, open the liquid stop valve completely, close the valve completely after 3 minutes or more have passed, and then repeat step 5. (Open the gas ball valve completely.) • I f the refrigerant collecting operation has been completed normally (LED1 off, LED2 lit), the unit will remain stopped until the power supply is turned off.

  • Page 28: Troubleshooting

    TROUBLESHOOTING 10-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller and control board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below. Check the contents below before investigating details. Unit conditions at service Check code Actions to be taken for service (summary) Judge what is wrong and take a corrective action according Displayed to “10-4.
  • Page 29 10-2-2. Test run for wired remote controller <PAR-3xMAA ("x" represents 0 or later)> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Test run" with the F1 or F2 button, and press the button. Select "Test run" with the F1 or F2 button, and press the button.

  • Page 30: Error Information

    <Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. C heck code, error unit, refrigerant address, unit model name, and serial Error information number will appear. Error code The model name and serial number will appear only if the information have Error unit been registered.
  • Page 31 <Checking the error information> While no errors are occurring, page 2/2 of the error information can be viewed by Main Main menu selecting "Error information" from the Main menu. Restriction Errors cannot be reset from this screen. Energy saving Night setback Filter information Error information Main display: Cursor Page <Error history> S elect "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Check" with the F1 or F2 button, and press the button.
  • Page 32 10-2-3. Test run for wireless remote controller (Type C) Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M". TEST RUN 1 Turn on the main power to the unit. TEST RUN 2 Press the button twice continuously. (Start this operation from the status of remote controller display turned off.) A and current operation mode are displayed. TEST RUN TEMP ON/OFF MODE 3 Press the ( ) button to activate mode, then COOL check whether cool air blows out from the unit. MODE 4 Press the ( ) button to activate mode, then HEAT check whether warm air blows out from the unit. AUTO STOP 5 Press the button and check whether strong air blows out AUTO START from the unit. MODE VANE VANE 6 Press the button and check whether the auto vane operates...
  • Page 33 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-3xMAA ("x" represents 0 or later)> S elect "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Select "Self check" with the F1 or F2 button, and press the button. Self check W ith the F1 or F2 button, enter the refrigerant address, and press the button. Ref. address C heck code, unit number, attribute will appear.
  • Page 34 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. S elect "Service" from the Main menu, and press the button. Maintenance password Remote controller check Select "Remote controller check" with the F1 or F2 button, and press button. S elect "Remote controller check" from the Service menu, and press the but- Remote controller check ton to start the remote controller check and see the check results. Start checking? To cancel the remote controller check and exit the "Remote controller check"...
  • Page 35 10-3-3. Self-diagnosis for wireless remote controller (Type C) When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1. Press the CHECK button twice. • "CHECK" lights, and refrigerant address "00" flashes. Refrigerant address • Check that the remote controller's display display has stopped before continuing. CHECK CHECK display 2. Press the temperature • Select the refrigerant address of the buttons. indoor unit for the self-diagnosis. Temperature button Note: Set refrigerant address using the TEMP ON/OFF outdoor unit’s DIP switch (SW1). (For more information, see the ON/OFF button outdoor unit installation manual.) AUTO STOP...
  • Page 36 • 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 37 10-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is put on> Note: Refer to indoor unit section for code P and code E. Check code Abnormal points and detection method Case judgment and action 1 No voltage is supplied to termi- 1 Check following items. nal block (TB1) of outdoor unit. a) Power supply breaker is a) Power supply breaker turned off. b) Contact failure or disconnec- b) Connection of power supply terminal block. tion of power supply terminal (TB1) c) Open phase (L or N phase) c) Connection of power supply terminal block. (TB1) 2 Electric power is not supplied to power supply terminal of out- 2 Check following items. door power circuit board.
  • Page 38 Check code Abnormal points and detection method Case judgment and action 1 Check disconnection or looseness or polarity Miswiring of indoor/outdoor unit 1 Contact failure or miswiring of indoor/outdoor unit connecting of indoor/outdoor unit connecting wire of connecting wire 1. Outdoor controller circuit board can wire indoor and outdoor units. automatically check the number of 2 Diameter or length of indoor/ connected indoor units. Abnormal if the outdoor unit connecting wire is 2 Check diameter and length of indoor/outdoor number cannot be checked automatically out of specified capacity. unit connecting wire. due to miswiring of indoor/outdoor unit Total wiring length: 80 m 3 Excessive number of indoor connecting wire, etc. after power is units are connected to 1 out- (including wiring connecting each indoor unit turned on for 4 minutes. door unit. (4 units or more) and between indoor and outdoor unit) 2. Abnormal if outdoor controller circuit Also check if the connection order of flat cable...
  • Page 39 <Abnormalities detected while unit is operating> Check code Abnormal points and detection method Case judgment and action 1–6 C heck indoor unit and repair defect. High pressure (High pressure switch 1 Short cycle of indoor unit 2 Clogged filter of indoor unit 63H operated) Abnormal if high pressure switch 63H 3 Decreased airflow caused by dirt of indoor fan (4.15MPa) operated during compressor 4 Dirt of indoor heat exchanger operation. 5 Locked indoor fan motor 6 Malfunction of indoor fan motor 7 Defective operation of stop 7 Check if stop valve is fully open. valve (Not full open) 8 Clogged or broken pipe 8 Check piping and repair defect.
  • Page 40 Check code Abnormal points and detection method Case judgment and action Open/short of outdoor unit thermistors 1 Disconnection or contact fail- 1 Check connection of connector (TH3,TH6/TH7) on ure of connectors the outdoor controller circuit board. (TH3, TH6, TH7, and TH8) Abnormal if open or short is detected during Outdoor controller circuit Check connection of connector (CN3) on the compressor operation. board: TH3, TH6/TH7 outdoor power circuit board. Open detection of thermistors TH3 and TH6 Outdoor power circuit board: Check breaking of the lead wire for thermistor is inoperative for 10 seconds to 10 minutes (TH3,TH6,TH7,TH8). Refer to "10-9. TEST POINT DIAGRAM". after compressor starting and 10 minutes 2 Defective thermistor 2 Check resistance value of thermistor after and during defrosting. (TH3,TH6,TH7,TH8) or check temperature by 3 Defective outdoor controller Note: C heck which unit has abnormality...
  • Page 41 Check Code Abnormal points and detection method Case Judgment and action To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Detailed codes Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". 1 A bnormal increase in power source 1 C heck the field facility for the power supply. Overvoltage error 2 C orrect the wiring (U . V . W phase) to • Increase in DC bus voltage to voltage ZM35/50VKA: 400 V compressor. Refer to "10-9. TEST 2 D isconnection of compressor wiring ZM60/71VHA: 430 V POINT DIAGRAM". (Outdoor power cir- cuit board). 3 D efective outdoor power circuit board 3 R eplace outdoor power circuit board.
  • Page 42 Check Code Abnormal points and detection method Case Judgment and action 1 Defective outdoor fan (fan motor) 1 Check outdoor unit air passage. Over heat protection Abnormal if outdoor pipe thermistor (TH3) or short cycle of outdoor unit during detects 70: or more during compressor cooling operation operation. 2 Defective outdoor pipe thermistor 23 Turn the power off, and on again to (TH3) check the check code. If U4 is displayed, follow the U4 processing direction. 3 Defective outdoor controller board (UD)* * T he check code in the parenthesis indi- (1504) cates PAR−3xMAA ("x" represents 0 or later). 1 Stop valve is closed. 1 Open stop valve. Compressor overcurrent interruption 2 Decrease of power supply voltage 2 Check facility of power supply.
  • Page 43 Check Code Abnormal points and detection method Case Judgment and action 1 O pen stop valve. Compressor overcurrent interruption 1 Stop valve of outdoor unit is closed. Abnormal if overcurrent DC bus or com- 2 Decrease of power supply voltage 2 Check facility of power supply. pressor is detected after compressor starts 3 C orrect the wiring (U W phase) to 3 Looseness, disconnection or con- • • operating for 30 seconds. verse of compressor wiring connec- compressor. Refer to "10-9. TEST POINT tion DIAGRAM". (Outdoor power circuit board). 4 Defective fan of indoor/outdoor units 5 Short cycle of indoor/outdoor units 4 Check indoor/outdoor fan. 5 S olve short cycle. 6 Defective input circuit of outdoor controller board 6 R eplace outdoor controller circuit board.
  • Page 44 Check Code Abnormal points and detection method Case Judgment and action 1 2 remote controllers are set as “main.” Remote controller transmission error 1 Set a remote controller to main, and the (In case of 2 remote controllers) other to sub. (E3)/signal receiving error (E5) 1 Abnormal if remote controller could not 2 Remote controller is connected with find blank of transmission path for 6 2 indoor units or more. 2 Remote controller is connected with only seconds and could not transmit. one indoor unit. 3 Repetition of refrigerant address (Check code: E3) 4 Defective transmitting receiving circuit 3 The address changes to a separate of remote controller setting. 2 Remote controller receives transmitted data at the same time, compares the 5 Defective transmitting receiving circuit data, and when detecting it, judges of indoor controller board 4–6 Diagnose remote controller.
  • Page 45 Check Code Abnormal points and detection method Case Judgment and action Non defined check code 1 Noise has entered transmission wire 12 Turn the power off, and on again to This code is displayed when non-defined of remote controller. check. check code is received. Replace indoor controller board or 2 Noise has entered indoor/ outdoor unit connecting wire. outdoor controller circuit board if (6607 abnormality is displayed again. 3 Outdoor unit is not a series of power- inverter. 3 Replace outdoor unit with power-inverter 6608) type outdoor unit. Serial communication error 1 Breaking of wire or contact failure of 12 Check connection of each connector connector CN2 between the outdoor CN2 and CN4 between the outdoor 1 Abnormal if serial communication between outdoor controller circuit board controller circuit board and the controller circuit board and the outdoor...
  • Page 46 Check Code Abnormal points and detection method Case Judgment and action Abnormal refrigerant circuit 1 Abnormal operation of 4-way valve 1 When this error occurs, be sure to D uring Cooling, Dry, or Auto Cooling 2 Disconnection of or leakage in replace the 4-way valve. operation, the following conditions are refrigerant pipes 2 Check refrigerant pipes for disconnection regarded as failures when detected for 1 or leakage. 3 Air into refrigerant piping second. 4 Abnormal operation (no rotation) of 3 After the recovery of refrigerant, vacuum a) T he compressor continues to run for 30 indoor fan dry the whole refrigerant circuit.
  • Page 47 Check Code Abnormal points and detection method Case Judgment and action Common factor that has no relation with NO ACK signal Always try the following when the abnormality source 1. Transmitting side controller detects error “A7” occurs. abnormal if a message was transmitted 1 The unit of former address does not exist as address switch has changed but there is no reply (ACK) that a 1 Turn off the power supply of outdoor while the unit was energized. message was received. Transmitting side unit, indoor unit and FRESH MASTER 2 Extinction of transmission wire voltage detects abnormality every 30 seconds, 6 or LOSSNAY at the same time for 2 and signal is caused by over-range times continuously. minutes or more, and turn the power transmission wire.
  • Page 48 From the previous page. Check Code Abnormal points and detection method Case Judgment and action 5. If displayed address or attribute is 1 During sequential operation of indoor Same as mentioned in “A7” of the pre- unit and FRESH MASTER of other FRESH MASTER, indoor unit detects vious page. refrigerant system, if indoor unit abnormality when indoor unit transmits transmits signal to FRESH MASTER signal to FRESH MASTER and there while outdoor unit power supply of was no reply (ACK). same refrigerant system with FRESH MASTER is turned off or within 2 min- utes of restart, abnormality is detect- 2 Contact failure of transmission wire of indoor unit or FRESH MASTER 3 Disconnection of transmission connec- tor (CN2M) of indoor unit or FRESH MASTER 4 Defective transmitting receiving circuit of indoor unit or FRESH MASTER 6. If displayed address or attribute is...
  • Page 49 10-5. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display does not 1 C heck LED2 on indoor controller board. 1 12 V DC is not supplied to remote controller. work. (1) When LED2 is lit. (Power supply display is not indicated on LCD.) Check the remote controller wiring for 2 1 2–15 V DC is supplied to remote controller, how- breaking or contact failure. ever, no display is indicated. (2) When LED2 is blinking. • “PLEASE WAIT” is not displayed. Check short circuit of remote controller • “PLEASE WAIT” is displayed. wiring. (3) When LED2 is not lit. Refer to phenomena No.3 below. 2 C heck the following. • Failure of remote controller if “PLEASE WAIT” is not displayed • Refer to phenomena No.2 below if “PLEASE WAIT” is displayed. 2. “PLEASE WAIT” display is remained 1 A t longest 2 minutes after the power supply “PLEASE 1 Normal operation...
  • Page 50 Phenomena Factor Countermeasure 7. Remote controller display works 1 • Discharging temperature and indoor 1 Linear expansion valve fault normally and the unit performs Opening cannot be adjusted well due to linear heat exchanger temperature does not heating operation, however, the expansion valve fault. rise. capacity cannot be fully obtained. Inspect the failure by checking 2 Refrigerant shortage discharging pressure. 3 Lack of insulation for refrigerant piping • Replace linear expansion valve. 4 Filter clogging 2 • If refrigerant leaks, discharging 5 Heat exchanger clogging temperature rises and LEV opening 6 Air duct short cycle increases. 7 Bypass circuit of outdoor unit fault Inspect leakage by checking the temperature and opening. • Check pipe connections for gas leakage. 3 Check the insulation. 4 Open intake grille and check the filter. Clean the filter by removing dirt or dust on it. 5 • If the filter is clogged, indoor pipe temperature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure.
  • 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. applied to the models which The blower is operating just for cooling down the 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 Cooling;...
  • Page 59 10-6. HOW TO CHECK THE PARTS PUZ-ZM35VKA PUZ-ZM50VKA PUZ-ZM60VHA PUZ-ZM71VHA 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> TH4, TH33 160 to 410 k"...
  • 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 0: 15 k" 30: 4.3 k" 10: 9.6 k" 40: 3.0 k" 20: 6.3 k" 25: 5.2 k" -20 -10 0 10 20 30 40 50 Temperature (:) Medium temperature thermistor • Thermistor <Heat sink> (TH8)
  • 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 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 Drive circuit Blue Orange Yellow White Connector LEV-A LEV-B <Output pulse signal and the valve operation> Output Output (Phase) Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8 Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1 The output pulse shifts in above order. · When linear expansion valve operation stops, all output phases become OFF.
  • Page 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 diagrams below. Main body Coil Lead wire Stopper <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward. Be sure to detach the coil holding main body firmly. Otherwise pipes can bend due to stress. <How to attach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and attach the coil by inserting it downward into the main body. Then securely attach the coil stop- per to pipe B. (At this time, be careful that stress is not added to lead wire and main body is not wound by lead wire.) If the stop- per is not firmly attached to pipe B, coil may be detached from the main body and that can cause defective operation of linear expansion valve.

  • Page 64: Emergency Operation

    10-8. EMERGENCY OPERATION (1) When the check codes shown below are displayed on outdoor unit or microcomputer 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. ● When following abnormalities occur, emergency operation will be available. Inspected content Check code Open/short of outdoor unit thermistor (TH3/TH6/TH7/TH8) Indoor/outdoor unit communication error • Signal receiving error (Outdoor unit) Indoor/outdoor unit communication error • Transmitting error (Indoor unit) E0–E7 Communication error other than outdoor unit Communication error between outdoor controller board and M-NET board (Serial communication error)
  • Page 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: — Indoor pipe temperature (TH2) — Indoor 2-phase pipe temperature (TH5) — Set temperature — Outdoor liquid pipe temperature (TH3) (*1) Outdoor discharge pipe temperature (TH4) (*1) Outdoor 2-phase pipe temperature (TH6)
  • Page 66 Brief Check of POWER MODULE Usually, they are in a state of being short-circuited if they are broken. 10-9. TEST POINT DIAGRAM Measure the resistance in the following points (connectors, etc.). If they Outdoor controller circuit board are short-circuited, it means that they are broken. PUZ-ZM35VKA 1. Check of Diode (DS1, DS2) PUZ-ZM50VKA P - R , P - S , N - R , N - S Note: PUZ-ZM35/50 checks solder side. 2. Check of Q1 P - N 3. Check of IPM P - N , P - U , P - V , P - W , N - U , N - V , N - W P-N keeps being shirt-circuited until the smoothing condenser is charged by a tester. Note: T he marks, P , N , R , S , U , V and W shown in the diagram are not actually printed on the board. Communication power supply <CAUTION> TEST POINT CNF11 is high voltage. D71 Voltage 24 V DC − + CNVMNT Connect to CN51 M-NET adapter (CND)
  • Page 67 Outdoor controller circuit board <CAUTION> TEST POINT1 is high voltage. PUZ-ZM60VHA PUZ-ZM71VHA CNDM Manual defrost, 1–2: Input of low-level sound priority mode detect history record reset, refrigerant address 1–3: Input of external contact point Demand control setting Model select 21S4 4-way valve Test operation Pump down CN51 External signal output • Compressor operating signal Pipe replace • Abnormal signal Wiring replace CN52C Function switch Connect to the noise filter circuit board (CN52C) (ZM60/71V) Connect to A control service tool CNMNT Transmission to out- Connect to door power circuit M-NET adapter (CN5) board (CN4) CNVMNT Connect to M-NET adapter (CND) LEV-A,B Linear expansion valve...
  • Page 68 Outdoor power circuit board Brief Check of DIP-IPM and DIODE MODULE Usually, they are in a state of being short-circuited if they are broken. PUZ-ZM60VHA Measure the resistance in the following points (connectors, etc.). If they PUZ-ZM71VHA are short-circuited, it means that they are broken. 1. Check of DIP-IPM P2 - U2 , P2 - V2 , P2 - W2 , N2 - U2 , N2 - V2 , N2 - W2 P3 - U3 , P3 - V3 , P3 - W3 , N3 - U3 , N3 - V3 , N3 - W3 2. Check of DIODE MODULE P1 - L , P1 - N , L - N1 , N - N1...
  • Page 69 Outdoor M-NET board (optional) Switch for communication LED11 LED13 LED12 display between Outdoor unit Receiving CN2M Transmitting connecting display M-NET and outdoor board Connect to M-NET Serial communication with outdoor board LED2 Energizing display of M-NET board (5 V power supply) LED1 SW11 SW12 Power supply (5V/12V) input Energizing display M-NET address (1s digit) M-NET address of M-NET board (10s digit) 2 to 3 5 V DC Input 1, 2 : + (12 V power supply) 1 to 3 12 V DC Input 3 : – 10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS The black square ( ) indicates a switch position.
  • Page 70 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 *2 3,4,5,6 No function — — — Mode select *3 Demand function Low noise mode Always No function — — — Max Hz setting (cooling) Max Hz (cooling) o 0.8 Normal Always Max Hz setting (heating) Max Hz (heating) o 0.8 Normal Always...
  • Page 71 (2) Function of connector Action by open/ short operation Types Connector Function Effective timing Short Open Connector CN31 Start When power supply ON Emergency operation Normal (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. • T he ability varies according to the outdoor temperature and conditions, etc. 1 C omplete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option) 2 S W7-1 (Outdoor unit control board): OFF 3 S W1 ON: Low noise mode SW1 OFF: Normal operation...
  • Page 72 <Display function of inspection for outdoor unit> The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board. [Display] (1)Normal condition Outdoor controller board A-Control Service Tool Unit condition LED1 (Green) LED2 (Red) Error code Indication of the display When the power is turned on Lighted Lighted Alternately blinking display When unit stops Lighted Not lighted 00, etc. When compressor is warming up Lighted Not lighted 08, etc. Operation mode When unit operates Lighted Lighted C5, H7, etc. (2)Abnormal condition Indication Error Outdoor controller Detailed Check board...
  • Page 73 Indication Error Outdoor controller Detailed Check board Contents Inspection method reference code *1 page LED1 (Green) LED2 (Red) 3 blinking 1 blinking Abnormality of shell thermistor(TH33) 1Check if stop valves are open. P.39 and discharging temperature (TH4) 2Check if connectors (TH4, TH33, LEV-A, and LEV-B) on outdoor controller board are not disconnected. Abnormality of superheat due 3Check if unit is filled with specified amount of refrigerant. to low discharge temperature P.40 4Measure resistance values among terminals on indoor valve and outdoor linear expansion valve using a tester 2 blinking Abnormal high pressure (High 1Check if indoor/outdoor units have a short cycle on their air ducts. pressure switch 63H operated.) 2Check if connector (63H) on outdoor controller board is not disconnected. P.39 3Check if heat exchanger and filter is not dirty. 4Measure resistance values among terminals on linear expansion valve using a tester. 3 blinking Abnormality of outdoor fan 1Check the outdoor fan motor. P.40 motor rotational speed 2Check if connector (TH3) on outdoor controller...
  • Page 74 <Outdoor unit operation monitor function> [When optional part ‘A-Control Service Tool (PAC-SK52ST)’ is connected to outdoor controller board (CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of check code by controlling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis SW2 setting Display detail Explanation for display Unit 2 3 4 5 6 <Digital indicator LED1 working details> (Be sure that the 1 to 6 in the SW2 are set to OFF.) (1) Display when the power supply ON 1 second When the power supply ON, blinking displays by turns.
  • Page 75 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: or below, “−” and temperature are displayed by turns.) (Example) When −10:; 2 3 4 5 6 0.5 s 0.5 s 2 s Discharge temperature (TH4) −52 to 221 −52 to 221 (When the discharge thermistor detects 100: or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105:; 2 3 4 5 6 0.5 s 0.5 s 2 s Output step of outdoor FAN 0 to 10 0 to 10 Step 2 3 4 5 6 The number of ON/OFF times of com- 0 to 9999 pressor...
  • Page 76 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) on error −60 to 91 occurring (When the coil thermistor detects 0: or below, “–” −60 to 91 and temperature are displayed by turns.) (Example) When −15:; 0.5 s 0.5 s 2 s 2 3 4 5 6 Discharge temperature (TH4) on error −52 to 221 occurring (When the temperature is 100: or more, the −52 to 221 hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130:; 2 3 4 5 6 0.5 s 0.5 s 2 s Compressor operating current on error 0 to 50 occurring 0 to 50 2 3 4 5 6 Error history (1) (latest) When no error history, Alternate display of abnormal unit...
  • Page 77 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 4 The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code. Capacity Code ZM35V Code ZM50V display ZM60V 2 3 4 5 6 ZM71V Outdoor unit setting information • The tens digit (Total display for applied setting) Setting details Display details H·P / Cooling only...
  • Page 78 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17 to 30 17 to 30 °C 2 3 4 5 6 Outdoor pipe temperature/2-phase −60 to 91 (TH6) (When the temperature is 0: or less, “–” and °C −60 to 91 temperature are displayed by turns.) 2 3 4 5 6 Outdoor ambient temperature (TH7) −60 to 91 −60 to 91 (When the temperature is 0: or less, “–” and °C temperature are displayed by turns.) 2 3 4 5 6 Outdoor heat sink temperature (TH8) −40 to 200 −40 to 200 (When the temperature is 0: or less, “–” and temperature are displayed by turns.)
  • Page 79 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 150 to 400 DC bus voltage (When it is 100V or more, hundreds digit, tens 150 to 400 digit and ones digit are displayed by turns.) 2 3 4 5 6 Capacity save 0 to 100 0 to 100 (When the capacity is 100% hundreds digit, tens digit When air conditioner is connected to and ones digit are displayed by turns.) M-NET and capacity save mode is (Example) When 100%; demanded, a value from “0” to ”100” is 0.5 s 0.5 s 2 s displayed. 2 3 4 5 6 When there is no setting of capacity save, “100” is displayed. Error postponement code history (2) Postponement code display of outdoor unit Blinking: During postponement Code Lighting: Cancellation of postponement display “00” is displayed in case of no postponement.
  • Page 80 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 480 LEV-C opening pulse 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; Pulse 0.5 s 0.5 s 2 s 2 3 4 5 6 Indoor room temperature (TH1) on error 8 to 39 occurring 8 to 39 2 3 4 5 6 Indoor pipe temperature/Liquid (TH2) on −39 to 88 error occurring (When the temperature is 0°C or less, “–” and −39 to 88 temperature are displayed by turns.) (Example) When -15°C; 0.5 s 0.5 s 2 s 2 3 4 5 6 Indoor pipe temperature/Cond./Eva.
  • Page 81 The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail 0 to 255 Discharge superheat on error occurring (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by 0 to 255 turns.) (Example) When 150°C; Cooling = TH4 or TH33−TH6 Heating = TH4 or TH33−TH5 0.5 s 0.5 s 2 s 2 3 4 5 6 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 (Example) When 115°C; 2 3 4 5 6 0.5 s 0.5 s 2 s 0 to 999 Thermo-on time until error stops (When it is 100 minutes or more, hundreds digit, tens 0 to 999 digit and ones digit are displayed by turns.) (Example) When 415 minutes;...
  • Page 82 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit The following code will be a help to know the Controlling status of compressor operating status of unit. operating frequency • The tens digit Display Compressor operating frequency control Primary current control Secondary current control • The ones digit (In this digit, the total number of activated control is displayed.) Display Compressor operating frequency control Preventive control for excessive temp- erature rise of discharge temperature...

  • Page 83: Function Setting

    FUNCTION SETTING 11-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. <Table 1> Function selections (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.) : Initial setting Function Settings Mode No. Setting No. Remarks (when sent from the factory) Power failure automatic recovery The setting is Indoor temperature Average data from each indoor unit applied to all detecting Data from the indoor unit with remote controller...

  • Page 84: Service Menu

    11-1-1. Selecting functions using the wired remote controller <PAR-3xMAA ("x" represents 0 or later)> <Service menu> Maintenance password is required S elect "Service" from the Main menu, and press the button. Main Main menu Maintenance Initial setting *At the main display, the menu button and select "Service" to make the Service maintenance setting. Main display: Cursor Page W hen the Service menu is selected, a window will appear asking for the pass- Service menu word.
  • Page 85 <Function setting> S elect "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. S et the indoor unit refrigerant addresses and unit numbers with the F1 Function setting through F4 buttons, and then press the button to confirm the current Ref. address Unit No. Grp./1/2/3/4/All setting. Monitor: <Checking the indoor unit No.> Cursor Address When the...
  • Page 86 11-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation. (Mode 24: 2) The procedure is given after the flow chart.
  • Page 87 11-1-3. Selecting functions using the wireless remote controller <PAR-SL100A-E> 1 Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lighted and "00" blinks. (Fig. 11-1) Press the button to set the "50". Direct the wireless remote controller toward the receiver of the indoor unit and press the button. 2 Setting the unit number Press the button to set unit number A. (Fig. 11-2) Direct the wireless remote controller toward the receiver of the indoor unit and press the button. Fig. 11-1 Fig. 11-2 3 Select a mode Press the button to set Mode number B. (Fig. 11-3) Direct the wireless remote controller toward the receiver of the indoor unit and press the button. Current setting number: 1=1 beep (1 second) 2=2 beep (1 second each) 3=3 beep (1 second each) 4 Selecting the setting number...
  • Page 88 11-2. FUNCTION SELECTION OF REMOTE CONTROLLER 11-2-1. <PAR-32MAA> The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear. <Main display> <Main menu> Main Main menu Vane·Louver·Vent. (Lossnay) High power Room Timer Cool Set temp. Auto Weekly timer OU silent mode Main display: Mode Temp. Cursor Page Function buttons...

  • Page 89: Menu Structure

    <Menu structure> Press the button. MENU Move the cursor to the desired item with the buttons, and press the button. Main menu 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 Schedule Night setback Filter information Error information Maintenance Auto descending panel Manual vane angle 3D i-see Sensor Initial setting Main/Sub...
  • Page 90 <Main menu list> Setting and display items Setting details Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation. • Select a desired setting from "Off," "Low," and "High." High power Use to reach the comfortable room temperature quickly. • Units can be operated in the High-power mode for up to 30 minutes.

  • Page 91: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 12-1. HOW TO "MONITOR THE OPERATION DATA" 12-1-1. <PAR-3xMAA ("x" represents 0 or later)> Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller. S elect "Service" from the Main menu, and press the button. Check menu Error history Refrigerant volume check Refrigerant leak check Select "Check" with the F1 or F2 button, and press the button.
  • Page 92 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 to 50 Compressor-Accumulated operating time 0 to 9999...
  • Page 93 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 –...
  • Page 94 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 95 Description Request content Unit Remarks (Display range) Indoor-Fan operating time 0 to 9999 1 hour (After filter is reset) Indoor-Total operating time 10 hours 0 to 9999 (Fan motor ON time) Indoor fan output value (Sj value) 0 to 255 Fan control data –...
  • Page 96 12-2-1. Detail Contents in Request Code [Operation state] (Request code :" 0") Relay output state Power currently Data display Display Compressor Four-way valve Solenoid valve supplied to compressor – – – – Relay output state Operation mode Operation mode Display Operation mode STOP •...
  • Page 97 [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 98 [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 99 [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 100: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE 13-1-1. <PAR-3xMAA ("x" represents 0 or later)> Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”. This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models. Select "Service" from the Main menu, and press the button. Check menu Error history Refrigerant volume check...
  • Page 101 <Guide for opration condition> Check Points Inspection item Result Breaker Good Retightened Enter the temperature differences between into Terminal block Outdoor Unit Good Retightened the graph given below. Indoor Unit Good Retightened Operation state is determined according to the plotted areas on (Insulation resistance) M"...

  • Page 102: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUZ-ZM35VKA PUZ-ZM50VKA OPERATING PROCEDURE PHOTOS Top panel Top panel 1. Removing the top panel, service panel, front panel, back Photo 1 fixing screws fixing screw Top panel panel and grille (1) R emove the top panel fixing screws (4 × 10), one from the right and two from the left side, and detach the top panel. Grille (2) R emove 2 service panel fixing screws (4 × 10) and detach the service panel by pulling it downward. (See Photo 2) Back panel Grille fixing screws (3) R emove the front panel fixing screws (4 × 10), 3 from the front, 2 from the right and 2 from the left side, and detach the front panel.
  • Page 103 OPERATING PROCEDURE PHOTOS 3. Removing the electrical parts box (1) Remove the service panel. (See Photo 2) Electrical parts box Photo 5 fixing screw (2) Remove the top panel. (See Photo 1) (3) Remove the front panel. (See Photo 1) Controller circuit board (C.B) (4) Remove the back panel. (See Photo 1) Electrical part box (5) D isconnect the indoor/outdoor connecting wire from terminal block. (6) D isconnect the connector CNF1, LEV-A and LEV-B on the controller circuit board. <Symbols on the board> • CNF1 : Fan motor • LEV-A, LEV-B : LEV (7) Disconnect the pipe-side connections of the following parts. • 4-way valve (21S4) • Thermistor <Liquid> (TH3) • Thermistor <Comp. surface> (TH33) • Thermistor <Discharge> (TH4) • Thermistor <2-phase pipe, Ambient> (TH6/7) • High pressure switch (63H) (8) R emove the terminal cover and disconnect the compressor lead wire.
  • Page 104 OPERATING PROCEDURE PHOTOS 5. Removing the thermistor <Ambient> (TH7) Photo 7 Electrical parts box Thermistor <Outdoor> (1) Remove the service panel. (See Photo 2) (TH7) (2) Remove the top panel. (See Photo 1) (3) D isconnect the connector TH7 (red) on the controller circuit board in the electrical parts box. (4) L oosen the clamp for the lead wire in the rear of the electrical parts box. (See Photo 6) (5) P ull out the thermistor <Ambient> (TH7) from the sensor holder. Note: When replacing thermistor <Ambient> (TH7), replace it together with thermistor <2-phase pipe> (TH6), since they are combined together.
  • Page 105 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve Photo 10 (1) Remove the service panel. (See Photo 2) (2) Remove the top panel. (See Photo 1) (3) Remove the front panel. (See Photo 1) (4) Remove the back panel. (See Photo 1) 4-way valve (5) Remove the electrical parts box. (See Photo 5) (6) Remove the 4-way valve (See Photo 9) (7) Recover refrigerant. (8) Remove the welded part of 4-way valve. Note 1: Recover refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by LEV coil removing the back panel.
  • Page 106 OPERATING PROCEDURE PHOTOS 12. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See Photo 2) (2) Remove the top panel. (See Photo 1) (3) Remove the front panel. (See Photo 1) (4) Remove the back panel. (See Photo 1) (5) Remove the electrical parts box. (See Photo 5) Compressor (6) Remove the thermistor <Discharge> (TH4) and thermistor shell felt <Comp. surface> (TH33). (See Photo 8) (7) R emove 3 separator fixing screws (4 × 10) and remove the separator. (8) R emove the compressor body felt and compressor shell Compressor Rubber felt. (MC) mount (9) Cutting the band and remove the rubber mount. (10) Recover refrigerant. (11) R emove 3 compressor fixing nuts by using a spanner or a adjustable wrench. Band (12) Remove the welded pipe of compressor inlet and outlet. Compressor body felt Note: Recover refrigerant without spreading it in the air.
  • Page 107 PUZ-ZM60VHA PUZ-ZM71VHA PHOTOS OPERATING PROCEDURE 1. Removing the service panel and top panel Photo 1 Top panel fixing screws (1) R emove 3 service panel fixing screws (5 × 12) and slide Top panel the hook on the right downward to remove the service panel. (2) R emove screws (3 for front, 3 for rear/5 × 12) of the top panel and remove it. Side panel (R) Slide Service panel Fan grille Cover panel (Rear) Cover panel Grille fixing Service panel screws (Front) fixing screws 2. Removing the fan motor (MF1) Photo 2 Front panel Photo 3...
  • Page 108 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <2-phase pipe> (TH6) Photo 5 (1) Remove the service panel. (See Photo 1) Electrical parts box (2) Remove the top panel. (See Photo 1) Clamp (3) D isconnect the connector TH7/6 (red) on the controller circuit board in the electrical parts box. (4) L oosen the clamp for the lead wire on the top of the electrical parts box. (5) P ull out the thermistor <2-phase pipe> (TH6) from the sensor holder. Note: When replacing thermistor <2-phase pipe> (TH6), replace it together with thermistor <Ambient> (TH7), since they are combined together.
  • Page 109 OPERATING PROCEDURE PHOTOS & ILLUSTRATION 7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A), Photo 8 4-way valve coil LEV(B)) 4-way valve fixing screw (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 4) [Removing the 4-way valve coil] (4) Remove 4-way valve coil fixing screw (M4 × 6). (5) Remove the 4-way valve coil by sliding the coil toward you. (6) Disconnect the connector 21S4 (green) on the controller board in the electrical parts box. [Removing the LEV coil] (4) Remove the LEV coil by sliding the coil upward. (5) Disconnect the connectors, LEV A (white) and LEV B (red), on the controller circuit board in the electrical parts box. High pressure switch (63H) Figure 1...
  • Page 110 OPERATING PROCEDURE PHOTOS 10. Removing the high pressure switch (63H) Photo 9 (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) R emove 3 right side panel fixing screws (5 × 12) in the rear of the unit and remove the right side panel. (5) Pull out the lead wire of high pressure switch. (6) Recover refrigerant. (7) Remove the welded part of high pressure switch. Note 1: Recover refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by removing the right side panel.
  • Page 111 OPERATING PROCEDURE PHOTOS 12. Removing the compressor (MC) Photo 11 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) R emove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel. (See Photo 1) (4) R emove 2 back cover panel fixing screws (5 × 12) and remove the back cover panel. (5) Remove the electrical parts box. (See Photo 4) (6) R emove 3 valve bed fixing screws (4 × 10) and 4 ball valve Valve bed and stop valve fixing screws (5 × 16) and then remove the fixing screws Valve bed valve bed. (7) R emove 3 right side panel fixing screws (5 × 12) in the rear of the unit then remove the right side panel. (8) R emove 2 separator fixing screws (4 × 10) and remove the separator. Valve bed (9) Recover refrigerant. Power fixing screw (10) R emove the 3 points of the compressor fixing nut using receiver...
  • 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.OCH653 Made in Japan Specifications are subject to change without notice.

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