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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MSZ-HA25VA -
MSZ-HA35VA -
NOTE:
This service manual describes technical data of the indoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
E1
E1
Outdoor unit service manual
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································4
4. NOISE CRITERIA CURVES ·······························5
5. OUTLINES AND DIMENSIONS ·························6
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM ················7
8. SERVICE FUNCTIONS ······································8
9. TROUBLESHOOTING······································10
10. DISASSEMBLY INSTRUCTIONS·····················22
11. PARTS LIST······················································25
12. RoHS PARTS LIST···········································28
13. OPTIONAL PARTS···········································31
No. OB452
MUZ-HA·VA Series (OB453)
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Table of Contents
Related Manuals for Mitsubishi Electric MSZ-HA25VA-E1
Summary of Contents for Mitsubishi Electric MSZ-HA25VA-E1
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS INDOOR UNIT No. OB452 SERVICE MANUAL Wireless type Models MSZ-HA25VA - MSZ-HA35VA - Outdoor unit service manual MUZ-HA·VA Series (OB453) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················2 3. SPECIFICATION·················································4 4. NOISE CRITERIA CURVES ·······························5 5. -
Page 2: Technical Changes
TECHNICAL CHANGES MSZ-GA25VA - MSZ-HA25VA - MSZ-GA35VA - MSZ-HA35VA - 1. Indoor model has been changed. PART NAMES AND FUNCTIONS MSZ-HA25VA MSZ-HA35VA Air inlet Front panel Air filter (Anti-mold) Air outlet Remote controller Vertical vane Horizontal vane Remote control receiving section Emergency operation switch (E.O. - Page 3 MSZ-HA25VA MSZ-HA35VA ACCESSORIES Installation plate Installation plate fixing screw 4 o 25 mm Fixing screw for 3 3.5 o 1.6 mm (Black) Battery (AAA) for remote controller Wireless remote controller Felt tape (Used for left or left-rear piping) REMOTE CONTROLLER Signal transmitting section Operation display section ON/OFF (operate/stop) button...
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Page 4: Specification
SPECIFICATION Indoor model MSZ-HA25VA MSZ-HA35VA Function Cooling Cooling Heating Heating Single phase Single phase Power supply 230V,50Hz 230V,50Hz Air flow(Super High) K /h Capacity Air flow(High/Med./Low) K /h 558/420/318 468/390/306 558/420/318 546/426/306 Power outlet Running current 0.22 0.22 Power input Fan motor current 0.22 0.22... -
Page 5: Noise Criteria Curves
NOISE CRITERIA CURVES MSZ-HA25VA MSZ-HA35VA FAN SPEED FUNCTION SPL(dB(A)) LINE SPL(dB(A)) FAN SPEED FUNCTION LINE COOLING COOLING Super High Super High HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20... -
Page 6: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit : mm MSZ-HA25VA MSZ-HA35VA 11X20 Oblong hole 11X26 Oblong hole Installation plate Indoor unit Air in Wall hole [65 Installation plate Piping Drain hose Air out Insulation [ 35 O.D Liquid line [ 6.35 - 0.5m (Flared connection [ 6.35) Gas line [ 9.52 - 0.43m (Flared connection [ 9.52) Drain hose... -
Page 7: Wiring Diagram
WIRING DIAGRAM MSZ-HA25VA MSZ-HA35VA REFRIGERANT SYSTEM DIAGRAM MSZ-HA25VA Unit : mm MSZ-HA35VA Refrigerant pipe [9.52 (with heat insulator) Indoor coil Indoor thermistor heat RT12 exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe [6.35 (with heat insulator) Refrigerant flow in cooling Refrigerant flow in heating... -
Page 8: Service Functions
SERVICE FUNCTIONS MSZ-HA25VA MSZ-HA35VA 8-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.) Set time : 1-minute 1-second Set time : 3-minute 3-second (It takes 3 minutes for the compressor to start operation. - Page 9 8-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure.
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Page 10: Troubleshooting
TROUBLESHOOTING MSZ-HA25VA MSZ-HA35VA 9-1. Cautions on troubleshooting 1. Before troubleshooting, check the following: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during servicing. 1) Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug. - Page 11 9-2. Failure mode recall function Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (9-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.
- Page 12 2. Indoor unit failure mode table Upper lamp of OPERATION Abnormal point Condition Correspondence INDICATOR lamp (Failure mode) Not lighted Normal — — When the room temperature thermistor short Room temperature Refer to the characteristics of the room 1-time flash or open circuit is detected every 8 thermistor temperature thermistor (9-7.).
- Page 13 9-3. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. doesn't receive Outdoor unit doesn't lamp on the indoor unit is Outdoor unit the signal from operate normally. flashing on and off. doesn't remote controller. operate.
- Page 14 9-4. Troubleshooting check table Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and the following detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.
- Page 15 9-5. Trouble criterion of main parts MSZ-HA25VA MSZ-HA35VA Part name Check method and criterion Figure Room temperature Measure the resistance with a tester. thermistor(RT11) Refer to 9-7."Test point diagram and voltage", Indoor coil thermistor "2.Indoor electronic control P.C. board", the chart of thermistor. (RT12) Check 9-6.
- Page 16 9-6. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate. Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan doesn't operate. Turn OFF the power supply. Pay careful attention to the high voltage on the fan motor connector CN211.
- Page 17 Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller. Check of remote controller and indoor electronic control P.C. board wCheck if the remote controller is exclusive for this air conditioner. Switch ON the remote controller. Is LCD display on the the remote Replace the batteries.
- Page 18 The unit does not operate with the remote controller. Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch. Check of indoor P.C. board and indoor fan motor Turn OFF the power supply. Measure the resistance between CN211 3 Remove indoor fan motor connector CN211 from indoor Short circuit: and 4 of the indoor fan motor connector.
- Page 19 • When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. How to check mis-wiring and serial signal error Is there rated voltage in Check the power Turn OFF the power supply.
- Page 20 Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the Extend the distance between antennas and the indoor the antennas and the indoor unit within 3m, or is the unit, and/or the antennas and distance between the the outdoor unit.
- Page 21 9-7. Test point diagram and voltage MSZ-HA25VA MSZ-HA35VA 1. Indoor power P.C. board, Indoor terminal P.C. board Indoor terminal P.C. board Indoor power P.C. board Varistor (NR11) R111 Fuse (F11)(w) Indoor fan motor (CN211) 1 325V DC 3 (–) GND (high- voltage DC) 4 15V DC 5 (+)3-6V DC...
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Page 22: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. - Page 23 OPERATING PROCEDURE PHOTOS Electrical box 2. Removing the indoor electronic control P.C. board Photo 2 and the room temperature thermistor. Screw of the (1) Turn the breaker OFF. electrical cover (2) Remove the panel (Refer to 1) and the corner box. (3) Open the indoor electronic control P.C.
- Page 24 OPERATING PROCEDURE PHOTOS Photo 4 4. Removing the vane motor Screws of the vane motor (1) Turn the breaker OFF. (2) Remove the panel (Refer to 1) and the corner box. (3) Remove the indoor electronic control P.C. board holder (Refer to 2).
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Page 25: Parts List
PARTS LIST (non-RoHS compliant) MSZ-HA25VA MSZ-HA35VA 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. ACCESSORY AND REMOTE CONTROLLER (See 13.) 11-1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol Part No. in Wiring Part name Remarks MSZ-HA25VA - MSZ-HA35VA - Diagram E02 A89 234 E02 A89 000 PANEL ASSEMBLY Including No.3,4... - Page 26 PARTS LIST (non-RoHS compliant) MSZ-HA25VA MSZ-HA35VA 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MOTOR BED ELECTRICAL DRAIN ELECTRICAL COVER Q'ty/unit Symbol in Wiring Part No. Part name Remarks MSZ-HA25VA - MSZ-HA35VA - Diagram E02 A89 509 BEARING MOUNT ASSEMBLY E02 001 504 SLEEVE BEARING E02 897 702...
- Page 27 PARTS LIST (non-RoHS compliant) MSZ-HA25VA MSZ-HA35VA 11-4. INDOOR UNIT HEAT EXCHANGER Q'ty/unit Symbol Part No. in Wiring Remarks Part name MSZ-HA25VA - MSZ-HA35VA - Diagram E02 A89 620 INDOOR HEAT EXCHANGER E02 A90 620 INDOOR HEAT EXCHANGER {9.52 E02 815 666 UNION (GAS) E02 151 667 UNION (LIQUID)
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Page 28: Rohs Parts List
RoHS PARTS LIST (RoHS compliant) MSZ-HA25VA MSZ-HA35VA 12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. ACCESSORY AND REMOTE CONTROLLER (See 13.) 12-1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol Part No. in Wiring Part name Remarks MSZ-HA25VA - MSZ-HA35VA - Diagram E12 A89 234 E12 A89 000 PANEL ASSEMBLY Including No.3,4... - Page 29 RoHS PARTS LIST (RoHS compliant) MSZ-HA25VA MSZ-HA35VA 12-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MOTOR BED ELECTRICAL DRAIN ELECTRICAL COVER Q'ty/unit Symbol in Wiring Part No. Part name Remarks MSZ-HA25VA - MSZ-HA35VA - Diagram E12 A89 509 BEARING MOUNT ASSEMBLY E12 001 504 SLEEVE BEARING E12 897 702...
- Page 30 RoHS PARTS LIST (RoHS compliant) MSZ-HA25VA MSZ-HA35VA 12-4. INDOOR UNIT HEAT EXCHANGER Q'ty/unit Symbol Part No. in Wiring Remarks Part name MSZ-HA25VA - MSZ-HA35VA - Diagram E12 A89 620 INDOOR HEAT EXCHANGER E12 A90 620 INDOOR HEAT EXCHANGER {9.52 E12 815 666 UNION (GAS) E12 151 667 UNION (LIQUID)
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Page 31: Optional Parts
OPTIONAL PARTS 13-1. CATECHIN AIR FILTER The air filter contains a natural material, catechin, that is extracted from green tea. The catechin air filter deodorizes odor and noxious gases such as formaldehyde, ammonia, and acetaldehyde. Moreover, it restrains the activity of the viruses adhering to the filter. - Page 32 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Apr. 2006. No. OB452 6 New publication, effective Apr. 2006 Specifications subject to change without notice. Made in Japan...