Mitsubishi Electric PUZ-WZ85VAA Service Manual

Air to water heat pump units

Hide thumbs Also See for PUZ-WZ85VAA:

Installation manual (29 pages)

page of 90

/ 90
Bookmarks

Quick Links

Download this manual

AIR TO WATER HEAT PUMP UNITS

SERVICE MANUAL

[Model names]

[Service Ref.]

PUZ-WZ85VAA.UK

PUZ-WZ85VAA

PUZ-WZ85VAA-BS

PUZ-WZ85VAA-BS.UK

PUZ-WZ85VAAH-SC.UK

PUZ-WZ85VAAH-SC

PUZ-WZ85YAA.UK

PUZ-WZ85YAA

PUZ-WZ85YAA-BS.UK

PUZ-WZ85YAA-BS

PUZ-WZ85YAAH-SC.UK

PUZ-WZ85YAAH-SC

PUZ-WZ90VAA-W.UK

PUZ-WZ90VAA-W

PUZ-WZ90VAA-W-BS.UK

PUZ-WZ90VAA-W-BS

PUZ-WZ90YAA-W.UK

PUZ-WZ90YAA-W

PUZ-WZ90YAA-W-BS.UK

PUZ-WZ90YAA-W-BS

PUZ-WZ100VAA.UK

PUZ-WZ100VAA

PUZ-WZ100VAA-BS.UK

PUZ-WZ100VAA-BS

PUZ-WZ100VAAH-SC.UK

PUZ-WZ100VAAH-SC

PUZ-WZ100YAA.UK

PUZ-WZ100YAA

PUZ-WZ100YAA-BS.UK

PUZ-WZ100YAA-BS

PUZ-WZ100YAAH-SC.UK

PUZ-WZ100YAAH-SC

PUZ-WZ85VAA.UK

R290

[Model names]

[Service Ref.]

PUZ-WZ115VAA-W.UK

PUZ-WZ115VAA-W

PUZ-WZ115VAA-W-BS

PUZ-WZ115VAA-W-BS.UK

PUZ-WZ115YAA-W.UK

PUZ-WZ115YAA-W

PUZ-WZ115YAA-W-BS.UK

PUZ-WZ115YAA-W-BS

PUZ-WZ120VAA.UK

PUZ-WZ120VAA

PUZ-WZ120VAA-BS.UK

PUZ-WZ120VAA-BS

PUZ-WZ120VAAH-SC.UK

PUZ-WZ120VAAH-SC

PUZ-WZ120YAA.UK

PUZ-WZ120YAA

PUZ-WZ120YAA-BS.UK

PUZ-WZ120YAA-BS

PUZ-WZ120YAAH-SC.UK

PUZ-WZ120YAAH-SC

PUZ-WZ140VAA-W.UK

PUZ-WZ140VAA-W

PUZ-WZ140VAA-W-BS.UK

PUZ-WZ140VAA-W-BS

PUZ-WZ140YAA-W.UK

PUZ-WZ140YAA-W

PUZ-WZ140YAA-W-BS.UK

PUZ-WZ140YAA-W-BS

CONTENTS

1. REFERENCE MANUAL ······················· 2

2. SAFETY PRECAUTION ······················· 3

3. SPECIFICATIONS ···························· 22

4. DATA ·············································· 26

5. OUTLINES AND DIMENSIONS ··········· 28

6. WIRING DIAGRAM ··························· 29

7. WIRING SPECIFICATIONS ················ 32

8. REFRIGERANT SYSTEM DIAGRAM ··· 33

9. TROUBLESHOOTING ······················· 35

10. MONITORING THE OPERATION DATA BY

THE REMOTE CONTROLLER ············ 76

11. DISASSEMBLY PROCEDURE ············ 82

PARTS CATALOG (OCB880)

December 2024

No. OCH880

Note:

• This manual describes service

data of the outdoor units only.

Need help?

Do you have a question about the PUZ-WZ85VAA and is the answer not in the manual?

Questions and answers

Summary of Contents for Mitsubishi Electric PUZ-WZ85VAA

Page 1 AIR TO WATER HEAT PUMP UNITS December 2024 No. OCH880 SERVICE MANUAL R290 <Outdoor unit> <Outdoor unit> [Model names] [Service Ref.] [Model names] [Service Ref.] PUZ-WZ85VAA.UK PUZ-WZ115VAA-W.UK PUZ-WZ85VAA PUZ-WZ115VAA-W PUZ-WZ85VAA-BS PUZ-WZ85VAA-BS.UK PUZ-WZ115VAA-W-BS PUZ-WZ115VAA-W-BS.UK PUZ-WZ85VAAH-SC.UK PUZ-WZ115YAA-W.UK PUZ-WZ85VAAH-SC PUZ-WZ115YAA-W PUZ-WZ85YAA.UK PUZ-WZ115YAA-W-BS.UK PUZ-WZ85YAA PUZ-WZ115YAA-W-BS PUZ-WZ85YAA-BS.UK...
Page 2 REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM Service Model name Service ref. manual No. EHPT17X-VM2E EHPT17X-VM2E.UK ERPT17X-VM2E EHPT17X-VM6E.UK EHPT17X-VM6E EHPT17X-YM9E.UK EHPT17X-YM9E ERPT17X-VM2E.UK EHPT20X-YM9E EHPT20X-YM9E.UK EHPT20X-TM9E EHPT20X-TM9E.UK EHPT20X-MEHEW EHPT20X-MEHEW.UK OCH814 ERPT20X-VM2E ERPT20X-VM2E.UK OCB814 ERPT20X-VM6E ERPT20X-VM6E.UK ERPT20X-YM9E ERPT20X-YM9E.UK EHPT30X-YM9EE EHPT30X-YM9EE.UK...
Page 3 Use of electric devices prosecution, water leakage, electric shock or fire. (smartphone, notebook, tablet) Mitsubishi Electric does not accept responsibility for any direct, indirect, special or consequential loss, damage, liability or expense incurred or suffered which results from any works undertaken by an Handle tools with care.
Page 4 [1] R290 Refrigerant Properties (1) Properties of refrigerants. R290 refrigerant is classified as class A3 in the safety group of ISO817 because it has low toxicity (class A) and higher flammability (class 3). It is highly flammable and MUST be handled safely to prevent fire and explosion. Refrigerant R290 R410A...
Page 5 Mitsubishi Electric does not accept responsibility for any direct, indirect, special or consequential loss, damage, liability or expense incurred or suffered which results from any works undertaken by an unqualified or third party installer, or any failure, claim, damage or deficiency caused to a unit by improper installation, servicing, relocation, repair or disposing.
Page 6 (31) In order to not invalidate unit warranty and maintain the correct and safe functioning of the unit, please use only parts and accessories recommended by Mitsubishi Electric, to be installed by a competent electrician with the requisite professional qualifications in your jurisdiction. We accept no liability for damage or expenses caused by the incorrect installation of the unit and/or third party accessories, parts or components, which may result in water leakage, electric shock or fire.
Page 7 [3] Cautions for service (1) After completing service, charge the cycle with specified amount of refrigerant. (2) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant. [4] Safety requirement and work procedure of the repair service for unit using R290 refrigerant Observe the following safety requirements, precautions, and work procedures to perform the repair services.
Page 8 • Keep ignition sources away from outdoor units containing R290 refrigerant. Even in a well ventilated environment, do not bring ignition sources into the Protected Zone described in section 2-6. • Do not smoke during work and transportation. (1-7) Ventilated Area Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.
Page 9 (6) Removal and Evacuation of the R290 refrigerant 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 consideration.
Page 10 Use nitrogen only. Do not use oxygen, carbon dioxide, HFCs, and HCs. - The nitrogen gas pressure is to be 0.02 MPa or less. - Oxygen: Causes refrigerant oil deterioration due to oxidation. - Carbon dioxide: Degrades drying properties. - HFCs: If contact with an open flame is made, toxic gas is generated. R32 is lower flammable, leakage may cause fire. - HCs: If contact with an open flame, fire or explosion occur.
Page 11 < Connection diagram for airtightness testing devices > Gauge manifold Service port Nitrogen Lo knob Hi knob (Outdoor unit) Do not use chlorine-based refrigerant or oxygen/combustible gas as pressurized gas under any circumstances. (Using oxygen as pressurized gas will cause an explosion). Do not pressurize to the designed pressure all at once.
Page 12 (12) Charging Procedures Both liquid charging and gas charging are possible because R290 is a single refrigerant and its composition does not change. However it is difficult to change a sufficient amount by gas charging since R290 is a low pressure refrigerant. Therefore, R290 refrigerant should be charged by liquid charging using a cylinder with a siphon tube.
Page 13 (15) Recycling and disposal Do not dispose of the unit with the household waste. According to the laws and ordinances of each country, hand in the unit to a collection center for waste electrical or electronic equipment or to a recycler authorised by manufacturer. Check the following condition of the unit before transporting for disposal.
Page 14 (16) Parts inspection and regular replacement In addition to annual servicing, it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed instructions. Replacement and inspection of parts should always be done by a competent person with relevant training and qualifications.
Page 15 [5] Service tools Use the below service tools for R290 refrigerant. Can other refrigerant tools be used? Tool name Specifications R410A Be sure to use a gauge manifold compliant with R290 Gauge manifold Select it that can be used in the operating range of -0.1 to 3.35 MPaG Port size: 7/16 UNF 20 thread Be sure to use a charge hose compliant with R290.
Page 16 2-3. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the performance of the unit. 1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze. 2.
Page 17 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 A min).
Page 18 If you are concerned about a possible refrigerant leak from your unit, please contact your installer/supplier immediately or contact Mitsubishi Electric in your region directly for more information. A protective zone must be maintained around the area closest to the unit. See shaded in Fig. 2-2.
Page 19 • Specific dimensions of the protective zone are specified for each installation condition. Refer to the figures for each case. (1) When installed in a location with an open around (Fig. 2-3) Define the protective zone as follows: - 1 m around of the unit - 0.3 m from the ground.
Page 20 (4) When installed in a location where only the front opened (building walls on both sides) Where the distance between both sides of the unit and the wall is more than 1 m, define the protective zone as follows: (Fig. 2-6) - 1 m to the sides and to the front of the unit - the rear of the unit to the wall - 0.3 m from the ground.
Page 21 2-7. Water piping work WARNING: As the outlet water temperature can reach 75°C at maximum, do not touch the water piping directly with a bare hand, otherwise you will get burned. CAUTION: • Pipe-work shall be securely mounted and guarded from physical damage. •...
Page 22 SPECIFICATIONS 3-1. SPECIFICATIONS PUZ-WZ85VAA.UK PUZ-WZ85YAA.UK PUZ-WZ100VAA.UK PUZ-WZ100YAA.UK Service Ref. PUZ-WZ85VAA-BS.UK PUZ-WZ85YAA-BS.UK PUZ-WZ100VAA-BS.UK PUZ-WZ100YAA-BS.UK Power source (Phase, cycle, voltage) 1-phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V 1-phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V Max. current 23.0...
Page 23 Service Ref. PUZ-WZ85VAAH-SC.UK PUZ-WZ85YAAH-SC.UK PUZ-WZ100VAAH-SC.UK PUZ-WZ100YAAH-SC.UK Power source 1-phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V 1-phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V (Phase, cycle, voltage) Max. current 23.0 12.0 30.0 12.0 External finish Munsell: N8.75 Munsell N2.75 (FRONT PANEL) Refrigerant control Linear Expansion Valve...
Page 24 PUZ-WZ90VAA-W.UK PUZ-WZ90YAA-W.UK PUZ-WZ115VAA-W.UK PUZ-WZ115YAA-W.UK Service Ref. PUZ-WZ90VAA-W-BS.UK PUZ-WZ90YAA-W-BS.UK PUZ-WZ115VAA-W-BS.UK PUZ-WZ115YAA-W-BS.UK Power source 1-phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V 1-phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V (Phase, cycle, voltage) Max. current 23.0 12.0 30.0 12.0 External finish Munsell: N8.75...
Page 25 3-2. AVAILABLE RANGE (WATER FLOW RATE, RETURN WATER TEMP.) Note: If the value of water flow rate and return water temp. become lower than the available range, it could cause damage to the parts of unit. Heating Cooling PUZ-WZ85VAA (-BS) PUZ-WZ85VAAH-SC PUZ-WZ85VAA (-BS) PUZ-WZ85VAAH-SC PUZ-WZ85YAA (-BS)
Page 26 DATA NOISE CRITERION CURVES PUZ-WZ85VAA.UK PUZ-WZ85YAA.UK PUZ-WZ90VAA-W.UK PUZ-WZ90YAA-W.UK PUZ-WZ85VAA-BS.UK PUZ-WZ85YAA-BS.UK PUZ-WZ90VAA-W-BS.UK PUZ-WZ90YAA-W-BS.UK PUZ-WZ85VAAH-SC.UK PUZ-WZ85YAAH-SC.UK SPL(dB) SPL(dB) MODE LINE MODE LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF...
Page 27 PUZ-WZ100VAA.UK PUZ-WZ100YAA.UK PUZ-WZ120VAA.UK PUZ-WZ120YAA.UK PUZ-WZ100VAA-BS.UK PUZ-WZ100YAA-BS.UK PUZ-WZ120VAA-BS.UK PUZ-WZ120YAA-BS.UK PUZ-WZ100VAAH-SC.UK PUZ-WZ100YAAH-SC.UK PUZ-WZ120VAAH-SC.UK PUZ-WZ120YAAH-SC.UK SPL(dB) SPL(dB) MODE LINE MODE LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR NC-20 HEARING FOR NC-20...
Page 28 OUTLINES AND DIMENSIONS Unit: mm OCH880...
Page 29 WIRING DIAGRAM PUZ-WZ85VAA.UK PUZ-WZ90VAA-W.UK PUZ-WZ115VAA-W.UK PUZ-WZ85VAA-BS.UK PUZ-WZ90VAA-W-BS.UK PUZ-WZ115VAA-W-BS.UK PUZ-WZ85VAAH-SC.UK OCH880...
Page 30 PUZ-WZ85YAA.UK PUZ-WZ100YAA.UK PUZ-WZ120YAA.UK PUZ-WZ85YAA-BS.UK PUZ-WZ100YAA-BS.UK PUZ-WZ120YAA-BS.UK PUZ-WZ85YAAH-SC.UK PUZ-WZ100YAAH-SC.UK PUZ-WZ120YAAH-SC.UK PUZ-WZ90YAA-W.UK PUZ-WZ115YAA-W.UK PUZ-WZ140YAA-W.UK PUZ-WZ90YAA-W-BS.UK PUZ-WZ115YAA-W-BS.UK PUZ-WZ140YAA-W-BS.UK OCH880...
Page 31 PUZ-WZ100VAA.UK PUZ-WZ120VAA.UK PUZ-WZ140VAA-W.UK PUZ-WZ100VAA-BS.UK PUZ-WZ120VAA-BS.UK PUZ-WZ140VAA-W-BS.UK PUZ-WZ100VAAH-SC.UK PUZ-WZ120VAAH-SC.UK OCH880...
Page 32 WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit model WZ85/90V WZ100/115V WZ120/140V WZ85 - 140Y ~/N (single), ~/N (single), ~/N (single), 3N~ (3 ph 4-wires), Outdoor unit power supply 50 Hz, 230 V 50 Hz, 230 V 50 Hz, 230 V 50 Hz, 400 V Outdoor unit input capacity Main 25 A...
Page 33 REFRIGERANT SYSTEM DIAGRAM PUZ-WZ85VAA.UK PUZ-WZ85YAA.UK PUZ-WZ115VAA-W.UK PUZ-WZ115YAA-W.UK PUZ-WZ85VAA-BS.UK PUZ-WZ85YAA-BS.UK PUZ-WZ115VAA-W-BS.UK PUZ-WZ115YAA-W-BS.UK PUZ-WZ85VAAH-SC.UK PUZ-WZ85YAAH-SC.UK PUZ-WZ90VAA-W.UK PUZ-WZ90YAA-W.UK PUZ-WZ90VAA-W-BS.UK PUZ-WZ90YAA-W-BS.UK ø 12.7 Refrigerant flow in heating 17(TH4) Refrigerant flow in cooling ø 12.7 ø19.05 19(TH7) 20(TH8) 18(TH6) 21(TH33) ø22.20 Water Outlet Flow direction of LEV A...
Page 34 PUZ-WZ100VAA.UK PUZ-WZ100YAA.UK PUZ-WZ140VAA-W.UK PUZ-WZ140YAA-W.UK PUZ-WZ100VAA-BS.UK PUZ-WZ100YAA-BS.UK PUZ-WZ140VAA-W-BS.UK PUZ-WZ140YAA-W-BS.UK PUZ-WZ100VAAH-SC.UK PUZ-WZ100YAAH-SC.UK PUZ-WZ120VAA.UK PUZ-WZ120YAA.UK PUZ-WZ120VAA-BS.UK PUZ-WZ120YAA-BS.UK PUZ-WZ120VAAH-SC.UK PUZ-WZ120YAAH-SC.UK Refrigerant flow in heating ø12.7 Refrigerant flow in cooling 18(TH4) ø19.05 ø12.7 20(TH7) 21(TH8) 22(TH33) ø22.20 19(TH6) Water Outlet Water 17(TH3) Flow direction of LEV A ø19.05 Inlet ø9.52...
Page 35 TROUBLESHOOTING 9-1. 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 control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check the contents below before investigating details.
Page 36 9-2. SELF-DIAGNOSIS ACTION TABLE Note: Refer to indoor unit section for code P, code E, and Code L. <Abnormalities detected when the power is turned on> Check code Abnormal points and detection method Cause judgment and action No voltage is supplied to terminal Check following items.
Page 37 Check code Abnormal points and detection method Cause judgment and action Indoor/outdoor unit connector Contact failure or miswiring of Check disconnection or looseness or polarity miswiring, excessive number of units (2 indoor/outdoor unit connecting wire of indoor/outdoor unit connecting wire of units or more) indoor and outdoor units.
Page 38 Check code Abnormal points and detection method Cause judgment and action High pressure (High pressure switch Short cycle of indoor unit – Check indoor unit and repair defect. 63H operated) Clogged filter of indoor unit Decreased airflow caused by Abnormal if high pressure switch 63H dirt of indoor fan operated (3.2 MPa) during compressor Dirt of indoor heat exchanger...
Page 39 Check code Abnormal points and detection method Cause judgment and action Open/short of outdoor unit thermistors Disconnection or contact failure Check connection of connector (TH3, TH7/6) on (TH3, TH6, TH7 and TH8) of connectors the outdoor controller circuit board. Abnormal if open or short is detected during Outdoor controller circuit board: Check connection of connector (CN3) on the compressor operation.
Page 40 Check code Abnormal points and detection method Cause judgment and action Failure in the operation of the DC Check or replace the DC fan motor. Outdoor fan motor fan motor Abnormal if rotational frequency of the fan motor Check the voltage of the outdoor circuit Failure in the outdoor circuit controller is not detected during DC fan motor operation.
Page 41 Continued from the previous page. Check code Abnormal points and detection method Cause judgment and action PFC error (Overvoltage/ Abnormal increase in power Check the field facility for the power supply. Detailed Undervoltage/Overcurrent) source voltage codes Decrease in power source •...
Page 42 Check code Abnormal points and detection method Cause judgment and action Low pressure Leakage or shortage of Check intake superheat. Abnormal if following conditions are refrigerant Check leakage of refrigerant. detected after compressor starts heating Malfunction of linear expansion Check linear expansion valve. operating for 3 minutes.
Page 43 Check code Abnormal points and detection method Cause judgment and action Remote controller control board Defective remote controller Replace remote controller. Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board. (Check code: E1) (6201 Abnormal if the clock function of remote controller cannot be normally operated.
Page 44 Check code Abnormal points and detection method Cause judgment and action Indoor/outdoor unit communication error Contact failure of indoor/ Check disconnection or looseness of indoor/ (Signal receiving error) (Outdoor unit) outdoor unit connecting wire outdoor unit connecting wire of indoor or Abnormal if outdoor controller circuit board outdoor units.
Page 45 Check code Abnormal points and detection method Cause judgment and action Pipe temperature Leakage or shortage of Check intake superheat. Abnormal if the following conditions are refrigerant Check leakage of refrigerant. detected for continuously 3 minutes after compressor starts operating for 10 minutes. Malfunction of linear expansion Check linear expansion valve.
Page 46 9-3. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display does not 12 VDC is not supplied to remote controller. Check LED2 on indoor controller board. work. (1) When LED2 is lit. Check the remote controller wiring for breaking or contact failure. (2) When LED2 is blinking.
Page 47 Phenomena Factor Countermeasure 7. A large amount of water is drained 1 Water is drained from PRV because of the 1 Check the below items following the indoor unit from the outdoor unit. pressure rise in water circuit. manual to suppress the pressure rise in water circuit.
Page 48 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 49 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller LED1: LED2: LED3: Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block of the indoor unit which is used to connect the indoor unit and the outdoor unit.
Page 50 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller LED1: LED2: LED3: Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block of the indoor unit which is used to connect the indoor unit and the outdoor unit.
Page 51 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller LED1: LED2: LED3: — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. 10 to 16 VDC? •...
Page 52 9-4. HOW TO CHECK THE PARTS Checkpoints Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a multimeter. <Liquid> (At the ambient temperature 10 to 30°C) Thermistor (TH4) Normal Abnormal <Discharge> Thermistor (TH6) 160 to 410 kΩ <Two-phase pipe>...
Page 53 Check method of DC fan motor (fan motor/outdoor controller circuit board) Notes · High voltage is applied to the connector (CNF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
Page 54 <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <Two-phase pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 kΩ ± 3 % B constant = 3480 ± 2 % =15exp{3480( 273+t – 273 )} 0 °C 15 kΩ...
Page 55 Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve>...
Page 56 (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 57 9-6. TEST POINT DIAGRAM Outdoor controller circuit board <CAUTION> TEST POINT1 is high voltage. CNDM 1–2: Manual defrost, defect Input of low-level sound priority mode history record reset, 1–3: refrigerant address Input of external contact point Function switch Function switch Function switch 21S4 4-way valve...
Page 58 Outdoor power circuit board Brief Check of POWER MODULE PUZ-WZ85VAA.UK If they are short-circuited, it means that they are broken. PUZ-WZ85VAA-BS.UK Measure the resistance in the following points (connectors, etc.). PUZ-WZ85VAAH-SC.UK 1. Check POWER MODULE Check of DIODE circuit PUZ-WZ90VAA-W.UK R - P1 , S - P1 , R - N1 , S - N1 PUZ-WZ90VAA-W-BS.UK...
Page 59 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUZ-WZ100VAA.UK Measure the resistance in the following points (connectors, etc.). 1. Check POWER MODULE PUZ-WZ100VAA-BS.UK Check of DIODE circuit PUZ-WZ100VAAH-SC.UK R1 - P1 , S1 - P1 , R1 - N1 , S1 - N1 PUZ-WZ120VAA.UK R2 - P4 , S2 - P4 , R2 - N4 , S2 - N4 PUZ-WZ120VAA-BS.UK...
Page 60 Outdoor noise filter circuit board PUZ-WZ100VAA.UK PUZ-WZ100VAA-BS.UK PUZ-WZ100VAAH-SC.UK PUZ-WZ120VAA.UK PUZ-WZ120VAA-BS.UK PUZ-WZ120VAAH-SC.UK PUZ-WZ140VAA-W.UK PUZ-WZ140VAA-W-BS.UK NI, LI Voltage of 230 VAC is input (Connect to the terminal block (TB1)) CNAC1, CNAC2 230 VAC (Connect to the outdoor controller circuit boar) EI, E2, E3, E4 Connect to the ground TB1, TB2...
Page 61 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. PUZ-WZ85YAA.UK PUZ-WZ115YAA-W.UK Measure the resistance in the following points (connectors, etc.). PUZ-WZ85YAA-BS.UK PUZ-WZ115YAA-W-BS.UK 1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 PUZ-WZ85YAAH-SC.UK PUZ-WZ120YAA.UK PUZ-WZ90YAA-W.UK PUZ-WZ120YAA-BS.UK...
Page 62 Outdoor noise filter circuit board PUZ-WZ85YAA.UK PUZ-WZ115YAA-W.UK PUZ-WZ85YAA-BS.UK PUZ-WZ115YAA-W-BS.UK PUZ-WZ85YAAH-SC.UK PUZ-WZ120YAA.UK PUZ-WZ90YAA-W.UK PUZ-WZ120YAA-BS.UK PUZ-WZ90YAA-W-BS.UK PUZ-WZ120YAAH-SC.UK PUZ-WZ100YAA.UK PUZ-WZ140YAA-W.UK PUZ-WZ100YAA-BS.UK PUZ-WZ140YAA-W-BS.UK PUZ-WZ100YAAH-SC.UK LO1, LO2, LO3 CNAC2 POWER SUPPLY 230 VAC LO1-LO2, LO2-LO3/LO3-LO1:400 VAC OUTPUT (Connect to the outdoor (Connect to the outdoor converter circuit board controller circuit board (L1-IN), ACL2, ACL3) (CNAC))
Page 63 Converter circuit board PUZ-WZ85YAA.UK PUZ-WZ115YAA-W.UK PUZ-WZ85YAA-BS.UK PUZ-WZ115YAA-W-BS.UK PUZ-WZ85YAAH-SC.UK PUZ-WZ120YAA.UK PUZ-WZ90YAA-W.UK PUZ-WZ120YAA-BS.UK PUZ-WZ90YAA-W-BS.UK PUZ-WZ120YAAH-SC.UK PUZ-WZ100YAA.UK PUZ-WZ140YAA-W.UK PUZ-WZ100YAA-BS.UK PUZ-WZ140YAA-W-BS.UK PUZ-WZ100YAAH-SC.UK L1-IN, N-IN Connect to the noise filter L1-A1 CK-OU circuit board (LO1, NO) Connect to the ACL1 Connect to the CK capacitor Connect to the outdoor power circuit board (CN7)
Page 64 9-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches Type Action by the switch operation ■ The black square ( ) indicates a switch position. Switch Function Effective timing switch Action by the switch operation Type of Switch Function Effective timing When compressor is working...
Page 65 Set DIP switch SW7-5 in the following case. - Current supply to the outdoor unit and power consumption in the outdoor unit is limited/increased. - Applies to V power supply models only. - When turning SW7-5 ON, please also turn SW8-3 ON. ■...
Page 66 <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 abnor- mality can be indicated in detail by connecting an optional part “A-Control Service Tool (PAC-SK52ST)” to connector CNM on outdoor controller board.
Page 67 Indication Error Outdoor controller board Detailed Check Contents Inspection method reference code* LED1 (Green) LED2 (Red) page 3 blinking 1 blinking 1 Check if stop valves are open. Abnormality of discharge 2 Check if connectors (TH4, LEV-A) on outdoor controller temperature (TH4) and Comp.
Page 68 <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 control- ling DIP SW2 on “'A-Control Service Tool'”.
Page 69 ■ The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Pipe temperature/Liquid (TH3) −40 to 90 −40 to 90 (When the coil thermistor detects 0°C or below, “–” and temperature are displayed by turns.) °C (Example) When −10°C;...
Page 70 ■ The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Pipe temperature/Liquid (TH3) on error −40 to 90 occurring (When the coil thermistor detects 0°C or below, “–” −40 to 90 and temperature are displayed by turns.) °C (Example) When −15°C;...
Page 71 ■ The black square ( ) indicates a switch position. Display detail Explanation for display SW2 setting Unit Capacity setting display Displayed as an outdoor capacity code. Capacity Code WZ85/90 Code display WZ100/115 2 3 4 5 6 WZ120/140 Outdoor unit setting information •...
Page 72 ■ The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Outdoor heat sink temperature (TH8) −40 to 200 −40 to 200 (When the temperature is 0°C or less, “–” and temperature are displayed by turns.) °C (When the thermistor detects 100°C or more, hundreds digit, tens digit and ones digit are...
Page 73 ■ The black square ( ) indicates a switch position. Display detail Explanation for display Unit SW2 setting Error postponement code history (3) Postponement code display of outdoor unit Blinking: During postponement Lighting: Cancellation of postponement Code “00” is displayed in case of no postponement. display 2 3 4 5 6 Error history (3) (Oldest)
Page 74 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit −40 to 90 2-phase pipe temperature thermistor (When the temperature is 0°C or less, “–” and (TH6) temperature are displayed by turns.) -40 to 90 (Example) When −15°C;...
Page 75 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Comp. surface temperature (TH33) −52 to 221 −52 to 221 (When the temperature is 0°C or less, "–" and tem- perature are displayed by turns.) (When the discharge thermistor detects 100°C or more, hundreds digit, tens digit, and ones digit are °C...
Page 76 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 10-1. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Refer to indoor unit service manual for how to use the controllers and request codes for indoor unit. Description Request content Unit...
Page 77 Description Request content Unit Remarks (Display range) Outdoor unit-Control state Refer to 10-1-1.Detail Contents in Request Code. – Compressor-Frequency control state Refer to 10-1-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 10-1-1.Detail Contents in Request Code. –...
Page 78 Description Request content Unit Remarks (Display range) Displays error history. 103 Error history 1 (latest) Code (" --" is displayed if no history is present.) Displays error history. 104 Error history 2 (second to last) Code (" --" is displayed if no history is present.) Displays error history.
Page 79 10-1-1. Detail Contents in Request Code [Operation state] (Request code : "0") Operation mode Data display Power currently Display supplied to Compressor 4-way valve Solenoid valve compressor Relay output state Relay output state Operation mode Display Operation mode STOP•FAN COOL•DRY HEAT DEFROST [Outdoor unit –...
Page 80 [Actuator output state] (Request code : "54") Data display Actuator output state 1 Actuator output state 2 Actuator output state 1 Actuator output state 2 Display 4-way valve Compressor Compressor is Display warming up [Error content (U9)] (Request code : "55") Data display Error content 1 Error content 2...
Page 81 [Outdoor unit – Capacity setting display] (Request code : "70") Data Display Capacity WZ85/90 WZ100/115 WZ120/140 [Outdoor unit – Setting information] (Request code : "71") Data display Setting information 1 Display Defrost mode Setting information 1 Setting information 2 Standard For high humidity Setting information 2 Single-/...
Page 82 DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/ FIGURES 1. Removing the service panel and top panel Photo 1-1 Top panel fixing screws (1) Remove the service panel fixing screws (3 for front and 1 Top panel for right/ 5 ×...
Page 83 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 3-1 3. Removing the electrical parts box (1) Remove the service panel. (See Photo 1-1) Electrical parts box (2) Remove the top panel. (See Photo 1-1) Controller (3) Disconnect the power supply cable from terminal block. circuit board (4) Disconnect the indoor/outdoor connecting wire from terminal block.
Page 84 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 4-1 Photo 4-2 4. Disassembling the electrical parts box (85/90/115V-type model only) Cont base front Power circuit board (1) Remove the electrical parts box. (See Photo 3-1) (2) Disconnect all the connectors on the controller circuit board. (3) To remove the controller circuit board, release it from the supports.
Page 85 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 6-1 Photo 6-2 6. Disassembling the electrical parts box Cont base front Cont base (100/120/140V model only) (1) Remove the electrical parts box. (See Photo 3-1) (2) Disconnect all the connectors on the controller circuit board. (3) To remove the controller circuit board, release it from the support.
Page 86 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 9 9. Removing the thermistor <Liquid> (TH3) Thermistor <Liquid> (TH3) (1) Remove the service panel. (See Photo 1-1) (2) Remove the top panel. (See Photo 1-1) (3) Remove the cover panel (front). (See Photo 3-1) (4) Remove the cover panel (rear) fixing screws (6 for rear and 2 for right/ 5 ×...
Page 87 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 11 11. Removing the 4-way valve coil (21S4), LEV coil (LEV-A), and lead wire for high pressure switch. (1) Remove the electrical parts box. (See Photo 3-1) [Removing the 4-way valve coil] LEV coil (2) Remove the 4-way valve coil fixing screw (1 for front/ M5) (LEV-A) 4-way valve coil fixing screw 4-way...
Page 88 OPERATING PROCEDURE PHOTOS/ FIGURES Photo 12-1 13. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1-1) For 100/120/140 models (2) Recover refrigerant. Thermistor <Comp.Surface> (TH33) (3) Remove the electrical parts box. (See Photo 3-1) (4) Remove the cover panel (front). (See Photo 3-1) (5) Remove the cover panel (rear).
Page 89 12), then slide the cable bracket upward to remove it. Cable bracket HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN ©Copyright 2024 MITSUBISHI ELECTRIC CORPORATION Published: Dec. 2024 No. OCH880 Specifications are subject to change without notice. Made in Japan...
Page 90 Related Links Model Number: PUZ-WZ100YAA Ecodan PUZ-WZ(100-120)(V-Y)AA Keymark Certificate (037-0161-25) Ecodan PUZ-WZ(85-100-120)(V-Y)AA(-BS) Installation Manual (DG79H252H01) Ecodan PUZ-WZ(85-100-120)(V-Y)AA(BS) DoC (CE2024C01) Ecodan R290 10kW Air Source Heat Pump TM65 Embodied Carbon Calculation PUZ-WZ(85-100-120)(V-Y)AA(-BS) Parts_Catalogue (OCB880) PUZ-WZ(85-100-120)(V-Y)AA(-BS) Service_Manual (OCH880) PUZ-WZ(85-100-120)(V-Y)AA(BS) DoC (UK2024C01) R290 8.5kW 10kW 12kW Product Information Sheet...

This manual is also suitable for:

Puz-wz85vaa-bsPuz-wz85vaah-scPuz-wz85yaa Puz-wz85yaa-bsPuz-wz85yaah-scPuz-wz90vaa-w ... Show all