Mitsubishi Electric MCFZ-A12WV Service Manual
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- Operating instructions manual (13 pages) ,
- Installation manual (14 pages)
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FLOOR AND CEILING TYPE AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
MCFZ-A12WV -
MCFZ-A18WV -
MCFZ-A24WV -
(When installed on the floor)
(When installed on the ceiling)
NOTE:
• This service manual describes technical data of indoor units.
• As for outdoor units MUZ-A12YV -
refer to the service manual OB328 REVISED EDITION-A.
• As for outdoor units MUZ-A18YV -
refer to the service manual OB346 REVISED EDITION-A.
(WH)
E1
(WH)
E1
(WH)
E1
Indication of
model name
MCFZ-A12WV -
E1
MCFZ-A18WV -
E1
MCFZ-A24WV -
E1
and MUZ-A12YVH -
,
E1
E1
and MUZ-A24YV -
,
E1
E1
Revision A:
MCFZ-A18WV-
have been added.
Please void OB344.
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
E1
E1
and MCFZ-A24WV-
No. OB344
REVISED EDITION-A
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric MCFZ-A12WV
Summary of Contents for Mitsubishi Electric MCFZ-A12WV
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Page 1: Table Of Contents
FLOOR AND CEILING TYPE AIR CONDITIONERS Please void OB344. No. OB344 REVISED EDITION-A SERVICE MANUAL Wireless type Models MCFZ-A12WV - (WH) MCFZ-A18WV - (WH) MCFZ-A24WV - (WH) CONTENTS (When installed on the floor) 1. PART NAMES AND FUNCTIONS······················2 2. -
Page 2: Part Names And Functions
PART NAMES AND FUNCTIONS MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV - INDOOR UNIT ACCESSORIES (When installed on the floor) Vertical vanes Item Q'ty Horizontal vane Installation plate Operation indicator lamp Unit fixing screw Remote control receiving section 5 o 12mm Front panel... - Page 3 MCFZ-A18WV - MCFZ-A24WV - REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE/ STOP (ON/ OFF)button ON/OFF WARM COOL TEMPERATURE buttons Open the front lid. Indication of remote controller model is on back. CLOCK ON/OFF WARM COOL FAN SPEED CONTROL button VANE CONTROL button STOP OFF-TIMER button...
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Page 4: Specification
SPECIFICATION Indoor model MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV - Function Cooling Heating Cooling Heating Cooling Heating Single phase Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz 230V, 50Hz Capacity Air flow(High/Med.W/LowW) K /h 780/636W/492W 840/696W/570W 840/744W/642W Power outlet Running current 0.30... -
Page 5: Noise Criteria Curves
NOISE CRITERIA CURVES MCFZ-A18WV - MCFZ-A12WV - SPL(dB LINE SPEED SPEED SPL(dB LINE High High Test conditions, Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:\ Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:... -
Page 6: Outlines And Dimensions
OUTLINES AND DIMENSIONS MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV - Unit: mm INDOOR UNIT 80.8 112.8 (When installed on the floor) 500mm or more 500mm or more (When installed on the ceiling) 500mm or more 1100 Gas line 9.52(MCFZ-A12WV) Liquid line 12.7(MCFZ-A18WV) - Page 7 MCFZ-A18WV - MODELS WIRING DIAGRAM MCFZ-A24WV - INDOOR UNIT GRN/YLW POWER SUPPLY RT12 ~/N 230V HIC1 50Hz LDCOM CN201 TAB12 LDC11 CIRCUIT BREAKER LDC12 LDFH X144 LDFM SR143 TO OUTDOOR LDFL SR142 UNIT LDFVL CN CN SR141 CONNECTING ELECTRONIC CONTROL P.C BOARD GRN/YLW DISP/ SW/THERMO...
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Page 8: Refrigerant System Diagram
How to modify the remote controller P.C. board Remove batteries before modification. The board has a print as shown below; Remote controller model : KG04B(MCFZ-A12WV),KG04C(MCFZ-A18/A24WV) NOTE : For remodelling, take out the batteries and press the OPERATE/STOP(ON/OFF) button twice or 3 times at first. - 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.
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Page 10: Troubleshooting
NOTE : 1.These figures show about MCFZ-A18WV or MCFZ-A24WV. 2. If the RESET button is not pressed, the remote controller may not operate correctly. 3. Remote controller of MCFZ-A12WV has a circuit to automatically reset the microcomputer when batteries are replaced. - Page 11 8-2. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. operates. OPERATION INDICATOR doesn't receive Outdoor unit Outdoor unit lamp on the indoor unit is the signal from doesn't doesn't operate flashing on and off. remote controller. operate. normally.
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Page 12: Troubleshooting Check Table
1. Troubleshooting check table • The following indication applies regardless of shape of the indicator. · Flashing of the OPERATION INDICATOR lamp (left-hand side lamp) Operation Indicator Lighted indicates possible abnormalities. · The OPERATION INDICATOR lamp (left-hand side lamp) is Not lighted lighting during normal operation. - Page 13 2. Trouble criterion of main parts MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV - Figure Part name Check method and criterion Room Measure the resistance with a tester. temperature (Part temperature 10°C ~ 30°C) thermistor (RT11) Normal Abnormal Indoor coil 8kΩ ~ 20kΩ...
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Page 14: 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 con- troller. 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 Replace the batteries.(Refer to page 10.) controller visible? - Page 15 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) MCFZ-A12WV w Short circuit of JPG and JPS on the indoor Start electronic control P.C.
- Page 16 MCFZ-A18WV MCFZ-A24WV Start • Turn ON the power supply (Indoor/ outdoor unit). • Press once EMERGENCY OPERATION switch. w Short circuit of JPG and JPS on the indoor After 3 minutes, mis-wiring is indicated electronic control P.C. board enables (0.5-second ON, 0.5-second OFF) self-check to be displayed in 3 seconds.
- Page 17 TEST POINT DIAGRAM AND VOLTAGE MCFZ-A12WV - Indoor electronic control P.C. board Fan motor power supply 230V AC Very Med. Fuse (F11) High 250V AC 3.15A Varistor (NR11) Power supply input 230V AC 5V DC – – 12V DC Release of “Auto restart function”...
- Page 18 TEST POINT DIAGRAM AND VOLTAGE MCFZ-A18WV - MCFZ-A24WV - Indoor electronic control P.C. board Fan motor power supply 230V AC Very Med. High Fuse (F11) 250V AC 3.15A Varistor (NR11) Power supply input 230V AC 5V DC – – 12V DC Release of “Auto restart function”...
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Page 19: Disassembly Instructions
Slide the sleeve and check if there is a locking lever or not. Sleeve 1Slide the sleeve. 2Pull the terminal while pushing the locking Locking lever lever. MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV - INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the electronic control P.C. board. - Page 20 OPERATING PROCEDURE PHOTOS 2. Removing the indoor fan motor Photo 4 (1) Remove the grille. (Refer to 1(1) (2).) (2) Remove the fan casing.(upper) Motor band Fan casing (3) Disconnect the connector of the indoor fan motor. (upper) (4) Disconnect the ground wire of the fan motor. (5) Remove the screws of the motor band and remove the catch.
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Page 21: Parts List
PARTS LIST MCFZ-A12WV - (WH) MCFZ-A18WV - (WH) MCFZ-A24WV - (WH) 10-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol MCFZ-A12WV MCFZ-A18WV MCFZ-A24WV in Wiring Part No. Part name Remarks Diagram... -
Page 22: Electrical Parts
MCFZ-A12WV - (WH) MCFZ-A18WV - (WH) MCFZ-A24WV - (WH) 10-3. ACCESSORY AND 10-2. INDOOR UNIT ELECTRICAL PARTS REMOTE CONTROLLER 10-2. INDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol MCFZ-A12WV MCFZ-A18WV MCFZ-A24WV in Wiring Part No. -
Page 23: Optional Parts
OPTIONAL PARTS MCFZ-A12WV - MCFZ-A18WV - MCFZ-A24WV - 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. - Page 24 HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jun. 2004. No.OB344 REVISED EDITION-A 6 New publication, effective Jun. 2004 Distributed in Apr. 2004. No.OB344 6 Specifications subject to change without notice.