Service manual

ManualsBrandsMitsubishi ManualsAir ConditionerMCFZ-A18WV

SERVICE MANUAL

Wireless type

Models

MCFZ-A12WV -

(WH)

MCFZ-A18WV -

(WH)

MCFZ-A24WV -

(WH)

(When installed on the ceiling)

(When installed on the floor)

FLOOR AND CEILING TYPE AIR CONDITIONERS

CONTENTS

1. PART NAMES AND FUNCTIONS······················2

2. SPECIFICATION·················································4

3. NOISE CRITERIA CURVES·······························5

4. OUTLINES AND DIMENSIONS ·························6

5. WIRING DIAGRAM ············································6

6. REFRIGERANT SYSTEM DIAGRAM················8

7. SERVICE FUNCTIONS ······································8

8. TROUBLESHOOTING······································10

9. DISASSEMBLY INSTRUCTIONS ····················19

10. PARTS LIST······················································21

11. OPTIONAL PARTS···········································23

Indication of

model name

MCFZ-A12WV -

MCFZ-A18WV -

MCFZ-A24WV -

NOTE:

• This service manual describes technical data of indoor units.

• As for outdoor units MUZ-A12YV - and MUZ-A12YVH - ,

refer to the service manual OB328 REVISED EDITION-A.

• As for outdoor units MUZ-A18YV - and MUZ-A24YV - ,

refer to the service manual OB346 REVISED EDITION-A.

E1E1

Revision A:

● MCFZ-A18WV- and MCFZ-A24WV-

have been added.

E1E1

Please void OB344.

No. OB344

REVISED EDITION-A

OB344A--1.qxp 04.6.14 1:04 PM Page 1

Summary of content (24 pages)

PAGE 1
OB344A--1.qxp 04.6.14 1:04 PM Page 1 Revision A: ● MCFZ-A18WV- E1 and MCFZ-A24WV- E1 have been added. FLOOR AND CEILING TYPE AIR CONDITIONERS Please void OB344. No. OB344 REVISED EDITION-A SERVICE MANUAL Wireless type Models MCFZ-A12WV MCFZ-A18WV MCFZ-A24WV - E1 (WH) E1 (WH) E1 (WH) CONTENTS (When installed on the floor) Indication of model name MCFZ-A12WV MCFZ-A18WV MCFZ-A24WV - E1 E1 E1 (When installed on the ceiling) NOTE: • This service manual describes technical data of indoor units.
PAGE 2
OB344A--1.qxp 1 04.6.14 1:04 PM Page 2 PART NAMES AND FUNCTIONS MCFZ-A12WV INDOOR UNIT E1 MCFZ-A18WV - (When installed on the floor) E1 MCFZ-A24WV - E1 ACCESSORIES Vertical vanes Item Horizontal vane Installation plate Unit fixing screw 5 o 12mm Wireless remote controller Remote controller holder Fixing screw for 3.
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OB344A--1.qxp 04.6.14 1:04 PM MCFZ-A18WV - Page 3 E1 MCFZ-A24WV - E1 REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE/ STOP (ON/ OFF)button PM AM TOO ON/OFF WARM TOO COOL TEMPERATURE buttons Open the front lid. Indication of remote controller model is on back. CLOCK PM AM TOO ON/OFF WARM VANE CONTROL button FAN TOO COOL STOP I FEEL COOL VANE START HEAT DRY MODE HR. OPERATION SELECT button ECONO COOL FAN SPEED CONTROL button OFF-TIMER button MIN.
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OB344A--1.qxp 2 04.6.14 1:04 PM Page 4 SPECIFICATION Indoor model Function Power supply Special remarks Fan motor Electrical data Capacity 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(at 20:) Dimensions WOHOD Weight Air direction Sound level(High/Med.W/LowW) Fan speed(High/Med.
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OB344A--1.qxp 04.6.14 1:04 PM 3 Page 5 NOISE CRITERIA CURVES MCFZ-A12WV - MCFZ-A18WV - E1 SPEED SPL(dB(A)) High 46 LINE OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.
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OB344A--1.qxp 4 04.6.14 1:04 PM Page 6 OUTLINES AND DIMENSIONS MCFZ-A12WV - E1 MCFZ-A18WV - E1 MCFZ-A24WV - Unit: mm E1 114 INDOOR UNIT 80.8 (When installed on the floor) 500 mm 16 112.8 616.5 500mm or more 650 500mm or more 906 93 77 (When installed on the ceiling) or m 143 500mm or more 113 42.5 1000mm or more 170 ore 180 1100 58 Gas line 9.52(MCFZ-A12WV) 12.7(MCFZ-A18WV) 15.88(MCFZ-A24WV) 19 162 Liquid line 6.
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OB344A--1.qxp 04.6.14 1:04 PM MCFZ-A18WV MCFZ-A24WV - Page 7 MODELS WIRING DIAGRAM E1 E1 INDOOR UNIT TB1 PE GRN/YLW N BLU L N TB2 TAB12 BLU F11 CN CN 101 113 3 CN 151 4 5 REMOTE CONTROLLER NAME DISP/ RECEIVER P.C.BOARD 1 2 3 4 5 6 7 8 WHT ORN RED BLK YLW BLU BRN RT11 NAME SYMBOL VANE MOTOR NR11 VARISTOR DC/DC CONVERTER RT11 ROOM TEMPERATURE THERMISTOR INDOOR FAN MOTOR(INNER FUSE) RT12 INDOOR COIL THERMISTOR NOTES: 1.
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OB344A--1.qxp 6 04.6.14 1:04 PM Page 8 REFRIGERANT SYSTEM DIAGRAM MCFZ-A12WV- MCFZ-A18WV- E1 MCFZ-A24WV- E1 INDOOR UNIT E1 INDOOR UNIT Refrigerant pipe [9.52 (with heat insulator) Muffler Indoor heat exchanger Indoor coil thermistor Flared connection RT12 Indoor heat Distributor exchanger Unit : mm Refrigerant pipe [12.7(MCFZ-A18MV) Refrigerant pipe [15.
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OB344A--1.qxp 04.6.14 1:04 PM Page 9 Table1. 1 unit operation 2 units operation 3 units operation 4 units operation No. 1 unit No modification Same as at left Same as at left Same as at left No. 2 unit – Solder J1 Same as at left Same as at left No. 3 unit – – Solder J2 Same as at left No.
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OB344A--1.qxp 8 04.6.14 1:04 PM Page 10 TROUBLESHOOTING MCFZ-A12WV - E1 MCFZ-A18WV - E1 MCFZ-A24WV - E1 8-1. 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 service.
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OB344A--1.qxp 04.6.14 1:04 PM Page 11 8-2. Instruction of troubleshooting Start Indoor unit operates. Outdoor unit doesn't operate. Outdoor unit operates in only Test Run operation. Check room temperature thermistor. Refer to "Test point diagram and voltage" on page 17 or 18. Flash on and off at 0.5second intervals Cause: Indoor/ Outdoor unit • Mis-wiring or trouble of serial signal Refer to D "How to check miswiring and serial signal error (When outdoor unit doesn't work)" on page 15 or 16.
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OB344A--1.qxp 04.6.14 1:04 PM Page 12 1. Troubleshooting check table • The following indication applies regardless of shape of the indicator. · Flashing of the OPERATION INDICATOR lamp (left-hand side lamp) indicates possible abnormalities. · The OPERATION INDICATOR lamp (left-hand side lamp) is Not lighted lighting during normal operation. Operation Indicator Lighted NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting. Self check table No.
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OB344A--1.qxp 04.6.14 1:04 PM Page 13 2. Trouble criterion of main parts MCFZ-A12WV - E1 MCFZ-A18WV - Part name Room temperature thermistor (RT11) E1 MCFZ-A24WV - E1 Figure Check method and criterion Measure the resistance with a tester. (Part temperature 10°C ~ 30°C) Indoor coil thermistor (RT12) Normal Abnormal 8kΩ ~ 20kΩ Open or short-circuit Measure the resistance between the terminals with a tester.
PAGE 14
OB344A--1.qxp 04.6.14 1:04 PM Page 14 Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller. B Check of remote controller and receiver P.C. board w Check if the remote controller is exclusive for this air conditioner. Switch on the remote controller. Is LCD display on remote controller visible? No Replace the batteries.(Refer to page 10.) (not clear) Yes Remove the batteries, then set them back and press the RESET button. (Refer to 10.
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OB344A--1.qxp 04.6.14 1:04 PM Page 15 When OPERATION INDICATOR 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 (when outdoor unit does not work) MCFZ-A12WV Start • Turn ON the power supply(Indoor unit). • Press once EMERGENCY OPERATION switch. w Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self-check to be displayed in 3 seconds. After 3 minutes, mis-wiring is indicated (0.5-second ON, 0.
PAGE 16
OB344A--1.qxp 04.6.14 1:04 PM Page 16 MCFZ-A18WV MCFZ-A24WV Start • Turn ON the power supply (Indoor/ outdoor unit). • Press once EMERGENCY OPERATION switch. After 3 minutes, mis-wiring is indicated (0.5-second ON, 0.5-second OFF) on OPERATION INDICATOR lamp on the indoor unit.w Yes Make them sure. w Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self-check to be displayed in 3 seconds.
PAGE 17
OB344A--1.qxp 04.6.14 1:04 PM Page 17 TEST POINT DIAGRAM AND VOLTAGE MCFZ-A12WV - E1 Indoor electronic control P.C. board Fan motor power supply 230V AC 7 6 5 4 3 2 1 Fuse (F11) 250V AC 3.15A Varistor (NR11) Power supply input 230V AC + – – + } 5V DC } 12V DC Release of “Auto restart function” Solder jumper wire to the JR07. (Refer to page 9.) Room temperature thermistor (RT11) Time short point JPG and JPS (Refer to page 8.
PAGE 18
OB344A--1.qxp 04.6.14 1:04 PM Page 18 TEST POINT DIAGRAM AND VOLTAGE MCFZ-A18WV - E1 MCFZ-A24WV - E1 Indoor electronic control P.C. board Fan motor power supply 230V AC 7 6 5 4 3 2 1 Fuse (F11) 250V AC 3.15A Varistor (NR11) Power supply input 230V AC + – – + } 5V DC } 12V DC Release of “Auto restart function” Solder jumper wire to the JR07. (Refer to page 9.) Room temperature thermistor (RT11) Time short point JPG and JPS (Refer to page 8.
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OB344A--1.qxp 04.6.14 1:04 PM 9 Page 19 DISASSEMBLY INSTRUCTIONS <"Terminal with lock mechanism" Detaching points> In case of terminal with lock mechanism, detach the terminal as shown below. There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism. The terminal with no lock mechanism can be removed by pulling it out. Check the shape of the terminal and work. Slide the sleeve and check if there is a locking lever or not.
PAGE 20
OB344A--1.qxp 04.6.14 1:04 PM Page 20 OPERATING PROCEDURE PHOTOS 2. Removing the indoor fan motor Photo 4 (1) (2) (3) (4) (5) Remove the grille. (Refer to 1(1) (2).) Remove the fan casing.(upper) Disconnect the connector of the indoor fan motor. Disconnect the ground wire of the fan motor. Remove the screws of the motor band and remove the catch. (6) Take out the sirocco fan and the indoor fan motor. Fan casing (upper) Motor band Indoor fan motor Screws 3. Removing the indoor heat exchanger.
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OB344A--1.qxp 04.6.14 1:04 PM 10 Page 21 PARTS LIST MCFZ-A12WV MCFZ-A18WV MCFZ-A24WV - E1 E1 E1 (WH) (WH) (WH) 10-1. INDOOR UNIT STRUCTURAL PARTS 15 14 13 1 12 11 2 10 3 9 4 8 5 6 7 Part number that is circled is not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Part No.
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OB344A--1.qxp 04.6.14 1:04 PM Page 22 MCFZ-A12WV - E1 (WH) MCFZ-A18WV - E1 (WH) MCFZ-A24WV - E1 (WH) 10-2. INDOOR UNIT ELECTRICAL PARTS 9 10-3. ACCESSORY AND REMOTE CONTROLLER 8 7 6 5 4 12 13 1 2 3 2 1 10-2. INDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 Part No.
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OB344A--1.qxp 04.6.14 1:04 PM 11 Page 23 OPTIONAL PARTS MCFZ-A12WV - E1 MCFZ-A18WV - E1 MCFZ-A24WV - E1 11-1. AIR CLEANING FILTER ● If the air cleaning filter is clogged, it may lower the unit’s capacity or cause condensation at the air outlet. ● The air cleaning filter is disposable. The standard usable term is about 4 months. However, if the color of the filter turns to dark brown, replace soon. Remove the air filter and the air cleaning filter together.
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OB344A--1.qxp 04.6.14 1:04 PM Page 24 HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jun. 2004. No.OB344 REVISED EDITION-A 6 Distributed in Apr. 2004. No.OB344 6 Made in Japan New publication, effective Jun. 2004 Specifications subject to change without notice.