Table of Contents
Advertisement
Quick Links
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MSH-A18ND -
MSH-A24ND -
MSH-A18ND
MSH-A24ND
NOTE:
This service manual describes technical data of the indoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS PARTS LIST (RoHS compliant).
All manuals and user guides at all-guides.com
S1
S1
CONTENTS
10. PARTS LIST······················································20
11. RoHS PARTS LIST···········································23
Revision B:
•Remote controller model has been changed.
•RoHS PARTS LIST has been added.
Please void OB427 REVISED EDITION-A.
Outdoor unit service manual
MUH-A·ND Series (OB428)
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································4
4. OUTLINES AND DIMENSIONS ·························5
5. WIRING DIAGRAM ············································6
6. REFRIGERANT SYSTEM DIAGRAM ················7
7. SERVICE FUNCTIONS ······································8
8. TROUBLESHOOTING······································10
9. DISASSEMBLY INSTRUCTIONS ····················18
No. OB427
REVISED EDITION-B
TM
Advertisement
Table of Contents
Related Manuals for Mitsubishi Electric MSH-A18ND-S1
Summary of Contents for Mitsubishi Electric MSH-A18ND-S1
-
Page 1: Table Of Contents
All manuals and user guides at all-guides.com Revision B: •Remote controller model has been changed. •RoHS PARTS LIST has been added. SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS Please void OB427 REVISED EDITION-A. INDOOR UNIT No. OB427 SERVICE MANUAL REVISED EDITION-B Wireless type Models MSH-A18ND - MSH-A24ND -... -
Page 2: Technical Changes
All manuals and user guides at all-guides.com Revision A: • Parts No. of 10.PARTS LIST has been revised. Revision B: •Remote controller model has been changed. (KP0A KM04A) Both remote controllers can be used as alternative. •RoHS PARTS LIST has been added. TECHNICAL CHANGES MSH-18TN - MSH-A18ND -... - Page 3 All manuals and user guides at all-guides.com REMOTE CONTROLLER MSH-A18ND MSH-A24ND Signal transmitting section Operation display section OPERATE /STOP (ON /OFF) button ON/OFF WARM COOL TEMPERATURE buttons Indication of remote controller model is on back. Open the front lid. CLOCK ON/OFF WARM COOL...
-
Page 4: Specification
All manuals and user guides at all-guides.com SPECIFICATION Indoor model MSH-A18ND MSH-A24ND Function Cooling Heating Cooling Heating Single phase Single phase Power supply 220V, 60Hz 220V, 60Hz Capacity Air flow (High/Med./Low) K /h 768/642/516 954/822/684 954/834/726 Running current 0.28 0.37 Power input Power factor Model... -
Page 5: Outlines And Dimensions
All manuals and user guides at all-guides.com OUTLINES AND DIMENSIONS MSH-A18ND Unit: mm MSH-A24ND INDOOR UNIT Installation plate Indoor unit 1068 414.5 414.5 Wall hole [75 Liquid line [ 6.35- 0.5m 1100 Air in Installation plate Gas line [ 12-0.43m Insulation [ 50 O.D [ 32 I.D for MSH-A18ND... -
Page 6: Wiring Diagram
All manuals and user guides at all-guides.com WIRING DIAGRAM MSH-A18ND INDOOR UNIT RT12 TO OUTDOOR HIC1 UNIT RT11 CONNECTING CN201 NR11 SR141 TAB12 220V~ CN211 ELECTRONIC CONTROL P.C. BOARD MV2 MV2 MV1 DISPLAY RECEIVER P.C.BOARD P.C.BOARD REMOTE CONTROLLER SYMBOL SYMBOL NAME NAME SYMBOL... -
Page 7: Refrigerant System Diagram
All manuals and user guides at all-guides.com REFRIGERANT SYSTEM DIAGRAM MSH-A18ND MSH-A24ND Unit:mm INDOOR UNIT INDOOR UNIT Refrigerant pipe [15.88 Refrigerant pipe [12.7 (with heat insulator) (with heat insulator) Indoor coil Indoor coil thermistor Indoor Indoor thermistor RT12(main) RT12 heat heat exchanger exchanger... -
Page 8: Service Functions
All manuals and user guides at all-guides.com SERVICE FUNCTIONS MSH-A18ND MSH-A24ND 7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. Set time : 1 minute 1-second Set time : 3 minute... - Page 9 All manuals and user guides at all-guides.com How to release “AUTO RESTART FUNCTION” Turn off the main power for the unit. Pull out the electronic control P.C. board, the receiver P.C. board and the display P.C.board. (Refer to 9-2.) Solder jumper wire to JR07 on the indoor electronic control P.C.
-
Page 10: Troubleshooting
All manuals and user guides at all-guides.com TROUBLESHOOTING MSH-A18ND MSH-A24ND 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 of 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 11 All manuals and user guides at all-guides.com 8-2. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. doesn't receive Outdoor unit lamp on the indoor unit is Outdoor unit the signal from doesn't operate flashing on and off. doesn't remote controller.
- Page 12 All manuals and user guides at all-guides.com 8-3. Troubleshooting check table • The following indication applies regardless of shape of the indicator. • 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.
- Page 13 All manuals and user guides at all-guides.com 8-4. Trouble criterion of main parts MSH-A18ND MSH-A24ND Part name Check method and criterion Figure Room temperature Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C) thermistor (RT11) Normal Indoor coil thermistor (RT12(main), RT13(sub)) 8 k"...
- Page 14 All manuals and user guides at all-guides.com 8-5. Troubleshooting flow When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor doesn’t operate. Check of indoor fan motor Turn OFF the power supply. Check connector CN211 visually. Is soldered point of the connector Are lead wires connected? Resolder it.
- Page 15 All manuals and user guides at all-guides.com The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by press- ing the EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board Check the both “parts side” and “pattern Varistor (NR11) side”...
- Page 16 All manuals and user guides at all-guides.com When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit doesn’t operate. How to check mis-wiring w Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self -check to be displayed in 3 seconds. Start •...
- Page 17 All manuals and user guides at all-guides.com 8-6. Test point diagram and voltage MSH-A18ND MSH-A24ND Indoor electronic control P.C. board Fan motor power supply Power supply input 220V AC 5V DC Fuse (F11) 250V AC 3.15A Room temperature ther- mistor(RT11) Indoor coil thermistor(RT12(main)) PS132...
-
Page 18: Disassembly Instructions
All manuals and user guides at all-guides.com 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. - Page 19 All manuals and user guides at all-guides.com OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Photo 3 Screws of the ground wire (1) Remove the front panel. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic Screw of the...
-
Page 20: Parts List
All manuals and user guides at all-guides.com PARTS LIST (non-RoHS compliant) MSH-A18ND MSH-A24ND 10-1. INDOOR UNIT STRUCTURAL PARTS 10-2. INDOOR UNIT HEAT EXCHANGER 8 (See 10-5.) 10-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring... - Page 21 All manuals and user guides at all-guides.com PARTS LIST (non-RoHS compliant) MSH-A18ND MSH-A24ND 10-4. ACCESSORY AND 10-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 15 16 10-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part No.
- Page 22 All manuals and user guides at all-guides.com PARTS LIST (non-RoHS compliant) 10-5. AIR CLEANING FILTER AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. Normal life of AIR CLEANING FILTER 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.
-
Page 23: Rohs Parts List
All manuals and user guides at all-guides.com RoHS PARTS LIST (RoHS compliant) MSH-A18ND MSH-A24ND 11-1. INDOOR UNIT STRUCTURAL PARTS 11-2. INDOOR UNIT HEAT EXCHANGER 8 (See 11-5.) 11-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring... - Page 24 All manuals and user guides at all-guides.com RoHS PARTS LIST (RoHS compliant) MSH-A18ND MSH-A24ND 11-4. ACCESSORY AND 11-3. INDOOR UNIT FUNCTIONAL PARTS AND REMOTE CONTROLLER ELECTRICAL PARTS 15 16 11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring...
- Page 25 All manuals and user guides at all-guides.com RoHS PARTS LIST (RoHS compliant) 11-5. AIR CLEANING FILTER AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. Normal life of AIR CLEANING FILTER 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.
- Page 26 All manuals and user guides at all-guides.com...
- Page 27 All manuals and user guides at all-guides.com...
- Page 28 All manuals and user guides at all-guides.com HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No.OB427 REVISED EDITION-B 6 Distributed in Feb. 2006. No.OB427 REVISED EDITION-A 106 New publication, effective May 2007 Distributed in Nov.