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SERVICE MANUAL

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

Wireless type
Models

MSZ-CA25VB -

(WH)

MSZ-CA35VB -

(WH)

No. OB390

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

MSZ-CA25VB -
MSZ-CA35VB -

NOTE:
This service manual describes technical data of the indoor units.
•As for outdoor units MUZ-CA25VB-

and MUZ-CA35VB-

, refer to the service manual

OB391.

•As for outdoor units MXZ-A14WV-

and MXZ-A18WV-

, refer to the service manual

OB319.

Indication of
model name

OB390--1qxp 05.2.9 11:27 Page 1

Содержание MSZ-CA25VB

Страница 1: ...0 DISASSEMBLY INSTRUCTIONS 22 11 PARTS LIST 24 Wireless type Models MSZ CA25VB WH MSZ CA35VB WH E1 E1 No OB390 SPLIT TYPE HEAT PUMP AIR CONDITIONERS MSZ CA25VB MSZ CA35VB E1 E1 NOTE This service manual describes technical data of the indoor units As for outdoor units MUZ CA25VB and MUZ CA35VB refer to the service manual OB391 As for outdoor units MXZ A14WV and MXZ A18WV refer to the service manual...

Страница 2: ...SZ A09YV MSZ CA25VB MSZ A12YV MSZ CA35VB E1 E1 E1 E1 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 ...

Страница 3: ...r left rear piping Air cleaning filter MSZ CA25VB E1 MSZ CA35VB E1 1 7 1 2 2 1 1 2 INDOOR UNIT INDOOR UNIT MSZ CA25VB MSZ CA35VB E1 E1 Emergency operation switch Operation section Horizontal vane Air filter Air outlet Vertical vane Air inlet to Breaker Remote control receiving section Remote controller Display section When the front panel is opened Operation indicator lamp Receiving section Air cl...

Страница 4: ...t lid Signal transmitting section Operation display section OPERATE STOP ON OFF button TEMPERATURE buttons OPERATION SELECT button FAN SPEED CONTROL button OFF TIMER button HR button MIN button TIME SET button ON TIMER button RESET button ECONO COOL button VANE CONTROL button CLOCK SET button Indication of remote controller model back side MSZ CA25VB MSZ CA35VB E1 E1 ...

Страница 5: ...phase 230V 50Hz 10 0 19 40 0 19 RC4V19 KA WHT BLK 316 BLK RED 299 815O278O217 10 5 3 10 10 10 KM04G Cooling 630 462W 288W 95 39 31W 22W 990 780W 560W Heating 642 474W 312W 94 38 30W 22W 1 000 790W 590W Air flow High Med W LowW Power outlet Running current 1 Power input 1 Auxiliary heater Power factor 1 Fan motor current 1 Model Winding resistance at20 Dimensions WOHOD Weight Air direction Sound le...

Страница 6: ...INE High FAN SPEED HEATING Heating Dry bulb temperature 20 Wet bulb temperature 15 MSZ CA25VB E1 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE COOLING FUNCTION 39 38 SPL dB A LINE High FAN SPEED HEATING Test con...

Страница 7: ...cord Lead to right 1 0m Lead to left 0 3m Wireless remote controller Liquid line 6 35 0 5m Gas line 9 52 0 43m Insulation 37 O D 21 I D 217 215 218 5 258 81 5 81 5 41 42 2 5 17 5 161 5 161 5 326 326 159 19 58 5 7 or more 90 110 30 149 606 278 60 815 783 Indoor unit Installation plate Wall hole 65 Installation plate Insulation 28 Drain hose 16 Connected part O D Air in Air out Power supply cord Lea...

Страница 8: ...L FUSE 93 INDOOR FAN MOTOR INNER FUSE VANE MOTOR NAME VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR MAIN INDOOR COIL THERMISTOR SUB SOLID STATE RELAY NAME SOLID STATE RELAY TRANSFORMER TERMINAL BLOCK CONTACTOR GRN YLW BLK GRY YLW BRN WHT RED MF 1 2 3 4 5 6 3 SR141 SR142 5 3 1 C11 RT13 RT12 CN 112 CN 111 CN 121 151 CN 109 CN 125 CN 1R1 CN MV 5 2 3 2 5 RT11 CN211 NR11 ELECTRONIC CONTRO...

Страница 9: ...l be regarded as the remote controller for the indoor unit The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set The setting will be cancelled if the breaker has turned off or the power supply has shut down Please conduct the above setting once again after the power has restored How to modify the remote controller P C bo...

Страница 10: ...failure the starting current of all the compressors may flow simultaneously at restart Therefore the special counter measures are required to prevent the main voltage drop or the rush of the starting current by adding to the system that allows the units to start one by one Operation 1 If the main power has been cut the operation settings remain 2 After the power is restored the unit restarts autom...

Страница 11: ...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 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electronic control P C board hold the edge of the board with care NOT...

Страница 12: ...or units with one outdoor unit Unit won t operate in case the total capacity of indoor units exceeds the capacity of outdoor units Do not connect indoor units beyond the outdoor unit capacity When you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the other for heating the operation mode of the indoor unit that operates earlier is selected The ...

Страница 13: ...leted 3Release the failure mode recall function according to Releasing the failure mode recall function mentioned above Repair the defective parts Release the failure mode recall function by the following procedures 1With the remote controller headed towards the indoor unit press any button that is not used in this failure mode recall function e g TIMER button OR 1Turn OFF the power supply of the ...

Страница 14: ... rotational frequency feedback signal is not emited during 12 second the indoor fan operation 2 time flash 2 5 second OFF Refer to the characteristic of the main indoor coil thermistor 9 7 Main indoor coil thermistor When the main indoor coil thermistor shorts or opens circuit is detected every 8 seconds during operation 1 time flash 2 5 second OFF Refer to 9 6 D How to check miswiring and serial ...

Страница 15: ...il thermistor Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Left lamp 5 time flash Cause Outdoor unit Outdoor power system abnormality Left lamp 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Left lamp 7 time flash Cause Outdoor unit Trouble of outdoor control system Refer to 9 6 D How to check mis wiring and serial signal error when outdoor unit doesn...

Страница 16: ... ON and 3 minutes OFF When the indoor fan breaks the fan keeps stopping When the rotational frequency feedback signal is not emit during 12 second indoor fan operation Refer to 9 6 A Check of indoor fan motor Left lamp flashes 4 time flash 2 5 second OFF Indoor control system When it cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Outdoor unit does no...

Страница 17: ...ormal BRN other one Abnormal Open or short circuit Measure the resistance between the terminals with a tester Part temperature 10 C 30 C Color of lead wire Color of lead wire BLK RED WHT GRY YLW BRN 240 260 Color of lead wire MAIN AUX FUSE RED YLW BRN ORN GRN ROTOR Check of indoor fan motor A When OPERATION INDICATOR lamp flashes 3 time Indoor fan does not operate Turn OFF the power supply Check t...

Страница 18: ... control P C board and N on the terminal block with the tester Is resistance approx 0 Replace the fuse F12 No Yes Check of remote controller and receiver P C board B Indoor unit operates by pressing the EMERGENCY OPERATION switch but does not operate with the remote controller wCheck if the remote controller is exclusive for this air conditioner CN302 CN125 CN109 1 2 1 2 3 1 5 4 3 Remote controlle...

Страница 19: ...oor connecting wire Turn ON the power supply Press EMERGENCY OPERATION switch Is there amplitude of 5 to 10V DC between outdoor terminal block N and 3 after 3 minutes for confirmation of serial signal 1 Turn OFF the power supply 2 Disconnect the connector CN61 between the compressor and the power transistor module 3 Turn ON the power supply 4 Press EMERGENCY OPERATION switch No Yes No Yes light up...

Страница 20: ...pper of the horizontal vane locked to the indoor unit correctly Yes No Is there resistance 0 Relock the stopper of the horizontal vane to the indoor unit Refer to 9 1 5 Yes Is OPERATION INDICATOR lamp flashing Yes No No OK Turn ON the power supply To check the continuity of safety device measure the resistance of connector 1 3 connected to CN1R1 on the indoor electronic control P C board Turn OFF ...

Страница 21: ...ction Solder the Jumper wire to the JR07 Refer to 8 3 CN302 Power monitor receiver P C board Power supply input 230V AC Varistor NR11 Fuse F11 250V AC 3 15A Room temperature thermistor RT11 Indoor coil thermistor RT12 MAIN Timer short mode point JPG JPS Refer to 8 1 Emergency operation switch Indoor fan motor 230V AC 5V DC 12V DC Safety device of fan by horizontal vane CN1R1 R132 J23 J33 J33 J12 I...

Страница 22: ...itor receiver P C board NOTE In case of removing only indoor electronic control P C board work 3 is not necessary 1 Remove the panel Refer to 1 2 Remove the power monitor receiver P C board holder from the bottom of electrical box 3 Open the power monitor receiver P C board holder and remove the power monitor receiver P C board 4 Remove the screw of the electrical cover and the electrical cover 5 ...

Страница 23: ...efer to 2 6 Remove the screw of ground wire Refer to 2 7 Disconnect the connector of the indoor coil thermistor CN112 the fan motor connector CN211 and CN121 the vane motor connector CN151 and the connector of the safety device CN1R1 on the electronic control P C board 8 Remove the fan motor lead wire and indoor coil thermistor from the electrical box 9 Remove the lead wire of vane motor and safet...

Страница 24: ... 10 11 E02 838 426 E02 527 083 REMOTE CONTROLLER REMOTE CONTROLLER HOLDER 1 1 1 1 KM04G BOX WH BOX WH PANEL ASSEMBLY WH SCREW CAP FRONT PANEL WH CATCH CATECHIN AIR FILTER CATECHIN AIR FILTER AIR CLEANING FILTER CORNER BOX RIGHT INSTALLATION PLATE INSTALLATION PLATE 1 1 2 1 2 2 2 1 1 Including No 3 4 5 2PCS SET 2PCS SET 1 1 2 1 2 2 2 1 1 WH WH 11 1 INDOOR UNIT STRUCTURAL PARTS 11 2 ACCESSORY AND RE...

Страница 25: ...FUSE VARISTOR VARISTOR VANE CRANK SET POWER MONITOR RECEIVER P C BOARD ELECTRONIC CONTROL P C BOARD ELECTRONIC CONTROL P C BOARD VANE MOTOR ROOM TEMPERATURE THERMISTOR INDOOR FAN MOTORw INDOOR FAN MOTORw MOTOR BAND TERMINAL BLOCK INDOOR COIL THERMISTOR INDOOR COIL THERMISTOR LINE FLOW FAN BEARING MOUNT BEARING MOUNT THERMAL FUSE 3 15A AUTO RESTART AUTO RESTART RC4V19 RC4V19 93 F11 NR11 NR12 MV RT1...

Страница 26: ...ILTER is 4 months However when it becomes dirty replace it as soon as possible 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 MAC 1300FT Model Part No MSZ CA25VB MSZ CA35VB E1 E1 ...

Страница 27: ...27 ...

Страница 28: ... 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Feb 2005 No OB390 6 Made in Japan New publication effective Feb 2005 Specifications subject to change without notice ...

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