Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
MSZ-CA25VB -
MSZ-CA35VB -
MSZ-CA25VB -
MSZ-CA35VB -
NOTE:
This service manual describes technical data of the indoor units.
•As for outdoor units MUZ-CA25VB-
OB391.
•As for outdoor units MXZ-A14WV-
OB319.
(WH)
E1
(WH)
E1
Indication of
model name
E1
E1
and MUZ-CA35VB-
E1
and MXZ-A18WV-
E1
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES ·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM ················8
8. SERVICE FUNCTIONS ······································9
9. TROUBLESHOOTING······································11
10. DISASSEMBLY INSTRUCTIONS·····················22
11. PARTS LIST······················································24
, refer to the service manual
E1
, refer to the service manual
E1
No. OB390
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric MSZ-CA25VB
Summary of Contents for Mitsubishi Electric MSZ-CA25VB
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OB390 SERVICE MANUAL Wireless type Models MSZ-CA25VB - (WH) MSZ-CA35VB - (WH) CONTENTS 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················3 3. SPECIFICATION·················································5 4. NOISE CRITERIA CURVES ·······························6 5. OUTLINES AND DIMENSIONS ·························7... -
Page 2: Technical Changes
TECHNICAL CHANGE MSZ-A09YV - MSZ-CA25VB - MSZ-A12YV - MSZ-CA35VB - 1. Indication of capacity has been changed.(BTU kW) 2. Shape of front panel has been changed.(Dimension has been changed) 3. Indoor electronic control P.C. board has been changed. -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS INDOOR UNIT MSZ-CA25VB - MSZ-CA35VB - Front panel Air cleaning filter (White bellows type) Air inlet to Breaker Power supply cord Panel Air filter Remote control receiving section Air outlet Vertical vane Horizontal vane Remote controller... - Page 4 MSZ-CA25VB - MSZ-CA35VB - Signal transmitting section Operation display section OPERATE /STOP (ON /OFF) button ON/OFF WARM COOL TEMPERATURE buttons Indication of remote controller model (back side) Open the front lid. ˚C CLOCK AMPM ON/OFF WARM COOL FAN SPEED CONTROL button...
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Page 5: Specification
SPECIFICATION Indoor model MSZ-CA25VB - MSZ-CA35VB - Function Cooling Cooling Heating Heating Single phase Single phase Power supply 230V,50Hz 230V,50Hz Air flow(High/Med. W /Low W ) Capacity K /h 504/360W/222W 630/462W/288W 564/402W/246W 642/474W/312W Power outlet Running current 0.17 0.19 Power input... -
Page 6: Noise Criteria Curves
NOISE CRITERIA CURVES MSZ-CA25VB - MSZ-CA35VB - FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING High High HEATING HEATING Test conditions, Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:... -
Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm MSZ-CA25VB - 81.5 133.5 Installation plate INDOOR UNIT Indoor unit 81.5 81.5 Wall hole Installation plate Liquid line 6.35-0.5m Gas line 9.52-0.43m Insulation 37 O.D Air in 21 I.D Drain hose (Connected part O.D) Air out... -
Page 8: Wiring Diagram
WIRING DIAGRAM MSZ-CA25VB - MSZ-CA35VB - MODELS WIRING DIAGRAM INDOOR UNIT RT13 TO OUTDOOR UNIT RT12 CONNECTING RT11 CN201 NR11 230V~ SR141 SR142 LD103 CN211 ELECTRONIC CONTROL P.C. BOARD POWER SUPPLY CORD ~/N 230V POWER MONITOR FOR MXZ type 50Hz... -
Page 9: Service Functions
SERVICE FUNCTIONS MSZ-CA25VB - MSZ-CA35VB - 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... - Page 10 Operation If the main power has been cut, the operation settings remain. After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3 minutes for the compressor to start running.) How to release “AUTO RESTART FUNCTION” Turn off the main power for the unit.
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Page 11: Troubleshooting
TROUBLESHOOTING MSZ-CA25VB - MSZ-CA35VB - 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 first turn off the remote controller to stop the main unit, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug. - Page 12 5. How to install the horizontal vanes If horizontal vanes are not installed correctly, both of the operation indicator lamps will blink. In this case, install the horizontal vanes correctly by following the procedures 1 to 6. NOTE: Before installation of the horizontal vanes, disconnect the power supply plug and/ or turn off the breaker. Upper vane Stopper Stopper...
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Page 13: Failure Mode Recall Function
9-2. Failure mode recall function Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though OPERATION INDICATOR lamp indication listed on the troubleshooting check (9-4.) table disappears, the memorized failure details can be recalled. This model is very useful when the unit needs to be repaired for the abnormality which doesn't recur. - Page 14 2. Indoor unit failure mode table NOTE:Blinking patterns of this mode differs from the ones of Troubleshooting check table(9-4.). Left lamp of Abnormal point OPERAITON Detection method Check point (Failure mode) INDICTOR Not lighted Normal – – 1-time flash When the serial signal from the outdoor Refer to 9-6.D "How to check miswiring Serial signal error 2.5-second OFF...
- Page 15 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.
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Page 16: Troubleshooting Check Table
9-4. Troubleshooting check table • The following indication applies regardless of shape of the indicator. Lighted Operation Indicator · Flashing of the OPERATION INDICATOR lamp (left-hand side or both lamp) indicates possible abnormalities. Blinking · The OPERATION INDICATOR lamp (left-hand side lamp) is Not lighted lighting during normal operation. - Page 17 9-5. Trouble criterion of main parts MSZ-CA25VB - MSZ-CA35VB - Part name Check method and criterion Figure Room temperature Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C) thermistor(RT11) Normal Abnormal Indoor coil thermistor Open or short-circuit 8 k" ~ 20 k"...
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Page 18: Check Of Remote Controller And Receiver P.c. Board
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller. Check of remote controller and receiver P.C. board wCheck if the remote controller is exclusive for this air conditioner. Switch on the remote controller. Indoor electronic control P.C. - Page 19 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 (when outdoor unit does not work) w Short circuit of JPG and JPS on the indoor Start electronic control P.C.
- Page 20 When both OPERATION INDICATOR lamps flash 1-time. Indoor unit and outdoor unit don’t operate. Check of installation of the horizontal vanes Start Turn OFF the power supply. Relock the stopper of the Is the stopper of the horizontal vane horizontal vane to the indoor unit. locked to the indoor unit correctly? Refer to 9-1.5.
- Page 21 9-7. Test point diagram and voltage MSZ-CA25VB - MSZ-CA35VB - Indoor electronic control P.C. board Power supply input 230V AC Fuse F11 250V AC 3.15A R132 Indoor fan motor 230V AC Safety device of fan by horizontal vane CN1R1 Room temperature...
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Page 22: Disassembly Instructions
2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 10-1. MSZ-CA25VB - MSZ-CA35VB - INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 (1) Remove the screw caps of the panel. - Page 23 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Vane motor Photo 3 Indoor coil thermistor (1) Remove the panel. (Refer to 1.) connector connector (2) Remove the electrical cover. (Refer to 2.) (3) Remove the V.A. clamp. (Refer to 2.) Screw of the (4) Remove the cord clamp.
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Page 24: Parts List
PARTS LIST MSZ-CA25VB - (WH) MSZ-CA35VB - (WH) 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. ACCESSORY AND REMOTE CONTROLLER 1 (w) 9 (w) 7 (See 11-5.) (w) These figures show about MSZ-CA35VB. 11-1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol Remarks Part No. - Page 25 MSZ-CA25VB - (WH) MSZ-CA35VB - (WH) 11-4. INDOOR UNIT HEAT EXCHANGER 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 22 (W) SLEEVE BEARING ROOM TEMPERATURE THERMISTOR (W) This figure shows about MSZ-CA35VB. FUSE VARISTOR 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration.
- Page 26 Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. DO NOT reuse AIR CLEANING FILTER even if it is washed. DO NOT remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-CA25VB - MAC-1300FT MSZ-CA35VB -...
- Page 28 HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Feb. 2005. No. OB390 6 New publication, effective Feb. 2005 Specifications subject to change without notice. Made in Japan...