Page 2 - INDOOR UNIT
TECHNICAL CHANGES 2 1 PART NAMES AND FUNCTIONS 2 INDOOR UNIT Grille Air inlet Remote controller Remote control receiving section Air cleaning filter(White bellows type) Horizontal vane Vertical vanes Catechin air filter (When the grille is opened) Operation section Display section Emergency operatio...
Page 3 - REMOTE CONTROLLER
REMOTE CONTROLLER MSH-A18NDMSH-A24ND 3 ON/OFF TOO COOL P M A M TOO WARM ON/OFF FAN TOO WARM TOO COOL VANE MODE ECONO COOL STOP START HR. MIN. WIDE VANE LONG I FEEL COOL HEAT DRY P M C L O C K A M RESET CLOCK Open the front lid. Signal transmitting section Operation display section OPERATE /STOP (ON ...
Page 4 - SPECIFICATION
SPECIFICATION 4 3 Indoor model Function Power supply Air flow (High/Med./Low) Running currentPower inputPower factorModelCurrentWinding resistance (at 20 : ) Dimensions W O H O D WeightAir directionSound level (High/Med./Low)Fan speed (High/Med./Low)Fan speed regulatorRemote controller model K /h A ...
Page 5 - OUTLINES AND DIMENSIONS
5 OUTLINES AND DIMENSIONS 4 258 162 19 58 47 7.5 315 255.5 47 2.5 98 173 98 173 414.5 414.5 5 253 791 56 1068 1100 325 Air out Air in Insulation [ 28 Drain hose [ 16 (Connected part O.D) Installation plate Wall hole [ 75 Wireless remote controller Installation plate Indoor unit { Liquid line [ 6.35-...
Page 6 - WIRING DIAGRAM; MF
6 WIRING DIAGRAM 5 MSH-A18ND INDOOR UNIT 1.About the outdoor side electric wiring, refer to the outdoor unit electric wiring diagram for servicing.2.Use copper conductors only. (For field wiring)3.Symbols below indicate. : Connector : Terminal block NOTES: SYMBOL C11 F11 HIC1 MF NAME INDOOR FAN CAPA...
Page 7 - REFRIGERANT SYSTEM DIAGRAM
7 REFRIGERANT SYSTEM DIAGRAM 6 Refrigerant flow in cooling Refrigerant flow in heating Strainer #50 MSH-A18ND INDOOR UNIT Indoorheatexchanger Room temperaturethermistorRT11 Refrigerant pipe [ 12.7 (with heat insulator) Flared connection Flared connection Indoor coil thermistor RT12 Refrigerant pipe ...
Page 8 - SERVICE FUNCTIONS; Table 1; How to modify the remote controller P.C. board
8 SERVICE FUNCTIONS 7 When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed arememorized by the indoor electronic control P.C. board. “Auto restart function” automatically starts operation in the samemode just before the shutoff of the ...
Page 9 - How to release “AUTO RESTART FUNCTION”; Operation; NOTE
9 How to release “AUTO RESTART FUNCTION” 1 Turn off the main power for the unit. 2 Pull out the electronic control P.C. board, the receiver P.C.board and the display P.C.board. (Refer to 9-2.) 3 Solder jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 8-6.) JR07 IC152 CN151 ...
Page 10 - TROUBLESHOOTING; Troubleshooting procedure; How to replace batteries; Lead wiring
10 TROUBLESHOOTING 8 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 firs...
Page 15 - Check of indoor electronic control P.C. board
15 Check of indoor electronic control P.C. board C Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually. Replace the fuse. Is fuse(F11) blown? Replace the fan motor. Replace the indoor electronic control P.C. board. Is winding resistance of fan motor 0 "...
Page 16 - How to check mis-wiring
16 How to check mis-wiring D 1. Turn OFF the power supply (outdoor unit) and disconnect indoor and outdoor connecting wire 3 on indoor side. 2. Short-circuit terminal block N - 3 by lead wire. 3. Turn ON the power supply (outdoor unit) and press EMERGENCY OPERATION switch once. During EMERGENCY OPER...
Page 18 - DISASSEMBLY INSTRUCTIONS; OPERATING PROCEDURE; Removing the front panel; Photo 1
18 DISASSEMBLY INSTRUCTIONS 9 MSH-A18ND MSH-A24NDINDOOR UNIT (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. 1 Slide the sleeve. 2 Pull the terminal while pushing the locking lever. 1 Hold the sleeve, and pull out the...
Page 19 - Removing the electrical box
19 OPERATING PROCEDURE PHOTOS Photo 4 Photo 6 Vane motors Indoorcoilthermistor 3. Removing the electrical box (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 an...
Page 22 - Model
22 Air cleaning filter (White bellows type) 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 CLEANI...
Page 24 - RoHS
24 E12 527 302E12 408 509E12 001 504E12 408 702E12 996 235E12 685 040E12 685 041E12 A49 382E12 817 385E12 527 034E12 A17 300E12 527 300E12 448 303E12 408 303E12 817 333E12 527 333E12 528 329E12 527 468E12 A17 452E12 A18 452E12 527 308E12 814 375E12 408 307E12 527 307E12 528 034E12 529 034 123456789 ...
Page 28 - Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD; TM
New publication, effective May 2007Specifications subject to change without notice. C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No.OB427 REVISED EDITION-B 6Distributed in Feb. 2006. No.OB427 REVISED EDITION-A 106Distributed in Nov. 2005. No.OB427 106Made in Ja...