Service manual

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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·····················31

11. PARTS LIST······················································35

12. OPTIONAL PARTS···········································38

Wireless type

Models

MSZ-FA25VA -

MSZ-FA35VA -

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

MSZ-FA25VA

MSZ-FA35VA

NOTE:

This service manual describes technical data of the indoor units.

INDOOR UNIT

Outdoor unit service manual

MUZ-FA series (OB417)

MXZ-A·VA series (OB447)

MXZ-8A140VA

1 (OC316)

No. OB416

REVISED EDITION-A

Revision:A

● model has been added.

Please void OB416.

OB416_--1qxp 12/2/05 4:27 PM Page 1

Summary of content (40 pages)

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OB416_--1qxp 12/2/05 4:27 PM Page 1 Revision:A ● SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS A2 model has been added. Please void OB416. INDOOR UNIT No. OB416 SERVICE MANUAL REVISED EDITION-A Wireless type Models MSZ-FA25VA MSZ-FA25VA MSZ-FA35VA MSZ-FA35VA - A1 A2 A1 A2 Outdoor unit service manual MUZ-FA series (OB417) MXZ-A·VA series (OB447) MXZ-8A140VA1 (OC316) CONTENTS MSZ-FA25VA MSZ-FA35VA 1. TECHNICAL CHANGES ····································2 2.
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OB416_--1qxp 12/2/05 4:27 PM Page 2 Revision:A • A2 model has been added. Color of BOX and CORNER BOX has been changed to white. 1 TECHNICAL CHANGES MSZ-A09YV - A1 MSZ-A12YV - A1 ➔ MSZ-FA25VA - A1 ➔ MSZ-FA35VA - A1 1. Indication of capacity has been changed.(BTU base ➔kW base) 2. Controller method between indoor and outdoor has been changed. 3. Power supply method has been changed (change to supply from outdoor unit). 4. Power supply cord has been removed. 5. Indoor electronic control P.C.
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OB416_--1qxp 12/2/05 4:27 PM Page 3 12. PLASMA DEODORIZING/AIR PURIFYING filter units have been added. 13. i-see Sensor has been added. (i-see control operation and AREA setting have been added.) 14. Air cleaning filer has been removed. 15. Signal of remote controller has been changed. (It is not available for the conventional models.) 16. Symbol on terminal block has been changed (to S1/S2/S3). MSZ-FA25VA- A1 ➔ MSZ-FA25VA- A2 MSZ-FA35VA- A1 ➔ MSZ-FA35VA- A2 1.
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OB416_--1qxp 12/2/05 4:27 PM Page 4 MSZ-FA25VA MSZ-FA35VA ACCESSORIES 1 Installation plate 1 2 Installation plate fixing screw 4 o 25 mm 5 3 Remote controller holder 1 4 Fixing screw for 3 3.5 o 1.
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OB416_--1qxp 12/2/05 4:27 PM 3 Page 5 SPECIFICATION Indoor model MSZ-FA25VA Function Cooling MSZ-FA35VA Cooling Heating Single phase 230V,50Hz Power supply Air flow(Super High) Air flow(High/Med./Low) Power outlet Running current ✽1 Power input ✽1 Power factor ✽1 Fan motor current ✽1 Model Fan motor Dimensions WOHOD Weight Air direction Sound level(Super High) Sound level(High/Med./Low) Fan speed(Super High) Fan speed(High/Med.
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OB416_--1qxp 4 12/2/05 4:27 PM Page 6 NOISE CRITERIA CURVES MSZ-FA25VA MSZ-FA35VA FAN SPEED FUNCTION Super High SPL(dB(A)) COOLING 42 HEATING 42 LINE FAN SPEED FUNCTION Super High 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 10 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 63 125 500 1000 2000 4000 HEATING 42 LINE 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 NC-20 250 42 Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19
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12/2/05 4:27 PM 5 Page 7 OUTLINES AND DIMENSIONS Unit : mm 11o26 Oblong hole 155 55 155 335 Indoor unit Wall hole [65 5 100 298 7 or more 198 624.5 102 Installation plate Liquid line [6.35 - 0.5m Gas line [9.52 - 0.43m Insulation [35 O.D [19 I.D { Drain hose [16 (Connected part O.D) 90 Insulation [28 106 19 Air out 159 58 70 320 Air in 3 41.5 780 53.5 55 215 Installation plate 11o20 Oblong hole 225 225 214 234 273.5 287.5 55 42.
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OB416_--1qxp 12/2/05 4:28 PM 6 Page 8 WIRING DIAGRAM MSZ-FA25VA MSZ-FA35VA INDOOR UNIT 230V~ TB S1 S2 TO OUTDOOR UNIT CONNECTING 12-24V S3 BLK TAB3 INDOOR ELECTRONIC CONTROL P.C. BOARD F11 DB111 BLU RED 2 1 4 CN 111 NR11 1 2 3 4 5 6 LD104 GRN 5 LD 101(A) CN 1R1 5 2 INTERLOCK SWITCH(FAN) MV1 MV2 SYMBOL DB111 F11 MF MP MT MV1 CN 110 LD 105(T) 3 8 4 5 SW P.C. BOARD POWER MONITOR RECEIVER P.C.
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OB416_--1qxp 12/2/05 4:28 PM 8 Page 9 SERVICE FUNCTIONS MSZ-FA25VA MSZ-FA35VA 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. However, the starting time is shortened by short circuit of JPG and JPS.) 8-2. P.C.
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OB416_--1qxp 12/2/05 4:28 PM Page 10 CN151 CN1T2 CN1T1 CN112 IC156 CN212 CN130 CN1R1 CN211 How to release “AUTO RESTART FUNCTION” 1Turn off the main power for the unit. 2Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (Refer to 9-7.) JR07 NOTE: • The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.
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OB416_--1qxp 12/2/05 4:28 PM 9 Page 11 TROUBLESHOOTING MSZ-FA25VA MSZ-FA35VA 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.
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OB416_--1qxp 12/2/05 4:28 PM Page 12 6. How to remove and install PLASMA DEODORIZING / AIR PURIFYING filter units If PLASMA/WASH lamp on the indoor unit blinks, clean the filters as soon as possible. The lamp will start blinking when accumulated operating time exceeds 330 hours. (1) Switch the indoor unit OFF with the remote controller and disconnect the power supply plug and/ or turn OFF the breaker.
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OB416_--1qxp 12/2/05 4:28 PM Page 13 INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT : MXZ series Multi system air conditioner can connect two or more indoor 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. Operation indicator lamp flashes as shown in the figure below.
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OB416_--1qxp 12/2/05 4:28 PM Page 14 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 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. 1.
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OB416_--1qxp 12/2/05 4:28 PM Page 15 2. Flow chart of PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode recall function Operational procedure The plasma unit might be abnormal. Confirm if plasma unit is abnormal according to the following procedures. Confirm that the remote controller is in the failure mode recall function. With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 23:.
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OB416_--1qxp 12/2/05 4:28 PM Page 16 4. Indoor unit failure mode table POWER lamp Abnormal point (Failure mode) Condition Correspondence Not lighted Normal – – 1-time flash every 0.5-second Room temperature thermistor When the room temperature thermistor short or open circuit is detected every 8 seconds during operation. Refer to the characteristics of the room temperature thermistor (9-7.). 2-time flash 2.
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OB416_--1qxp 12/2/05 4:28 PM Page 17 9-3. Instruction of troubleshooting w"Test Run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed. Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit doesn't receive the signal from remote controller. Outdoor unit operates only in Test Run operation. w Outdoor unit doesn't operate even in Test Run operation.
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OB416_--1qxp 12/2/05 4:28 PM Page 18 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. Lighted · Flashing of POWER lamp indicates abnormalities. Blinking Not lighted No.
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OB416_--1qxp 12/2/05 4:28 PM Page 19 Lighted · Flashing of AREA lamp(left-hand side lamp) indicates abnormality. Blinking Not lighted No. Abnormal point 1 Indoor control system Operation indicator lamp Left lamp of AREA lamp flashes. 4-time flash Symptom Indoor unit and outdoor unit do not operate. Correspondence Condition When it cannot properly read data in the nonvolatile memory of the indoor electronic control P.C. board. • Replace the indoor electronic control P.C. board. 2.
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OB416_--1qxp 12/2/05 4:28 PM Page 20 9-5. Trouble criterion of main parts MSZ-FA25VA MSZ-FA35VA Part name Room temperature thermistor(RT11) Indoor coil thermistor (RT12(MAIN), RT13(SUB)) Indoor fan motor(MF) Horizontal vane motor(MV1) Vertical vane motor(MV2) i-see Sensor motor(MT) Front panel driving motor (MP) Check method and criterion Figure Measure the resistance with a tester. Refer to 9-7. "Test point diagram and voltage", "Indoor electronic control P.C. board", the chart of thermistor.
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OB416_--1qxp 12/2/05 4:28 PM Page 21 9-6. Troubleshooting flow When POWER lamp flashes 3-time. Indoor fan does not operate. A 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. Is there any foreign matter that interferes the rotation of the line flow fan? Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
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OB416_--1qxp 12/2/05 4:28 PM Page 22 Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller. B 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. Is LCD display on the the remote controller visible? No Replace the batteries. (Refer to 9-1.4.) (not clear) Yes Remove the batteries, then set them back and press RESET button. (Refer to 9-1.4.
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OB416_--1qxp 12/2/05 4:28 PM Page 23 The unit does not operate with the remote controller. Also, POWER lamp does not light up by pressing EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211, vane motor connector CN151 front panel driving motor connector CN1U1 and the i-see Sensor motor connector CN110 from the indoor electronic control P.C. board and turn ON the power supply.
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OB416_--1qxp 12/2/05 4:28 PM Page 24 • When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When POWER lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. D How to check mis-wiring and serial signal error Turn OFF the power supply. No Is there rated voltage in the power supply? Check the power supply. Yes Turn ON the power supply.
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OB416_--1qxp 12/2/05 4:28 PM Page 25 When All lamps flash ON and OFF every 0.5-second. Indoor unit and outdoor unit do not operate. E Check of installation of the horizontal vane Turn OFF the power supply. Is the stopper of the horizontal vane locked to the indoor unit correctly? No Relock the stopper of the horizontal vane to the indoor unit. Refer to 9-1.5. Yes Turn ON the power supply.
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OB416_--1qxp 12/2/05 4:28 PM Page 26 When PLASMA/WASH lamp flashes 2-time. When POWER lamp flashes 1 to 5 times while PLASMA DEODORIZING / PLASMA AIR PURIFYING power failure mode is recalled. F Check of PLASMA DEODORIZING power After performing the check, make sure to release the failure mode recall function. High voltage (approx. -3.9kV) is generated during PLASMA DEODORIZING power operation. Pay careful attention and never touch PLASMA unit and the high-voltage lead part (red wire).
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OB416_--1qxp 12/2/05 4:28 PM Page 27 When PLASMA/WASH lamp flashes 2-time. When POWER lamp flashes 1 to 5 times while PLASMA DEODORIZING / PLASMA AIR PURIFYING power failure mode is recalled. G Check of PLASMA AIR PURIFYING power After performing the check, make sure to release the failure mode recall function. High voltage (approx. -3.9kV) is generated during PLASMA AIR PURIFYING power operation. Pay careful attention and never touch PLASMA unit and the high-voltage lead part (red wire).
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OB416_--1qxp 12/2/05 4:28 PM Page 28 Indoor unit and outdoor unit do not operate. H Check of auto front panel Turn the remote controller ON. No Does the front panel automatically open? (Does it start to move?) Yes Is the connectors for the front panel driving motor unit connected? (Motor side or P.C. board side) No Connect the connector and check from the start again. Yes Is the resistance between terminals of the front panel driving motor unit normal? (Refer to 9-5.
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OB416_--1qxp 12/2/05 4:28 PM Page 29 I Electromagnetic noise enters into TV sets or radios No Is the unit earthed? Earth the unit. Yes Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m? Yes Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.
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OB416_--1qxp 12/2/05 4:28 PM Page 30 9-7. Test point diagram and voltage MSZ-FA25VA MSZ-FA35VA Indoor electronic control P.C. board 5V DC 12V DC Cement resistance (R111) Indoor fan motor (CN211) 1325V DC 3(-) Fiducial terminal of cathode side on measuring high-voltage DC 415V DC 5(+)3-6V DC 6(+)0V DC or 15V DC Power supply input 230V AC Interlock switch(Fan) (CN1R1) { Room temperature thermistor (CN111) Varistor (NR11) SW P.C.
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OB416_--2qxp 12/2/05 4:26 PM 10 Page 31 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. (1) Slide the sleeve and check if there is a locking lever or not.
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OB416_--2qxp 12/2/05 4:26 PM Page 32 OPERATING PROCEDURE PHOTOS 2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, i-see Sensor, SW P.C. board and the terminal block (1) Remove the horizontal vane, the panel (Refer to 1.) and the corner box. (2) Remove the screw of the V.A. clamp, and then the indoor/outdoor connecting wire.(See Photo 3.) (3) Remove the switch holder from the electrical cover. (See Photo 4.
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OB416_--2qxp 12/2/05 4:26 PM Page 33 OPERATING PROCEDURE PHOTOS Photo 6 4. Removing the horizontal vane motor unit (1) Remove the horizontal vane and the panel. (Refer to 1.) (2) Remove the screws of the horizontal vane motor unit, and pull out the horizontal vane motor unit. (See Photo 6.) (3) Disconnect the connector from the horizontal vane motor unit. Screw of the horizontal vane motor unit Photo 7 5. Removing the vertical vane motor unit (1) Remove the horizontal vane, the panel (Refer to 1.
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OB416_--2qxp 12/2/05 4:26 PM Page 34 OPERATING PROCEDURE PHOTOS 7. Removing the plasma power P.C. board Photo 11 (1) Remove the horizontal vane, the panel (Refer to 1.) and the corner box. (2) Remove the switch holder and the electrical cover. (Refer to 3.) (3) Disconnect the connector of the front panel driving motor from the electronic control P.C. board. (4) Remove the front panel driving motor.
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OB416_--2qxp 12/2/05 4:26 PM 11 Page 35 PARTS LIST MSZ-FA25VA MSZ-FA35VA 11-1. INDOOR UNIT STRUCTURAL PARTS 1 11-2. ACCESSORY AND REMOTE CONTROLLER 10 9 8 7 2 3 4 5 6 11-1. INDOOR UNIT STRUCTURAL PARTS No. 1 2 3 4 5 6 7 8 Part No.
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OB416_--2qxp 12/2/05 4:26 PM Page 36 MSZ-FA25VA MSZ-FA35VA 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 29 30 27 25 26 24 20 1 28 31 2 22 3 4 32 5 6 7 21 23 8 18 17 16 15 18 14 13 11 12 9 11-4.
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OB416_--2qxp 12/2/05 4:26 PM Page 37 11-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS No. Part No.
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OB416_--2qxp 12 12/2/05 4:26 PM Page 38 OPTIONAL PARTS 12-1. DEODORIZING CERAMIC FILTER Replacement of the deodorizing ceramic filter(about once every 6 years) Deodorizing ceramic filter is installed inside PLASMA DEODORIZING filter unit. The filter is fragile. Handle it with care. NOTE: PLASMA DEODORIZING filter unit may not operate properly if the deodorizing ceramic filter is not installed. Be sure to install the deodorizing ceramic filter. (1) Release the two knobs to open the filter unit.
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OB416_--2qxp 12/2/05 4:26 PM Page 39 39
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OB416_--2qxp 12/2/05 4:26 PM Page 40 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jan. 2006. No. OB416 REVISED EDITION-A 6 Distributed in Jul. 2005. No. OB416 6 Made in Japan New publication, effective Jan. 2006 Specifications subject to change without notice.