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Mitsubishi Electronics MSH-A18ND manual

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Table of contents for the manual

  • Page 1

    CONTENTS 1. TECHNICAL CHANGES ····································2 2. P ART NAMES AND FUNCTIONS ······················2 3. SPECIFICA TION ·················································4 4. OUTLINES AND DIMENSIONS ·············[...]

  • Page 2

    TECHNICAL CHANGES 2 1 P ART NAMES AND FUNCTIONS 2 INDOOR UNIT Grille Air inlet Remote controller Remote control receiving section Air cleaning filter (White bellows type) Horizontal vane V ertical vanes Catechin air filter (When the grille is opened) Operation section Display section Emergency operation switch Operation indicator lamp Remote contro[...]

  • Page 3

    REMOTE CONTROLLER MSH-A18ND MSH-A24ND 3 ON/OFF TOO COOL PM AM 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 PM CLOCK AM RESET CLOCK Open the front lid. Signal transmitting section Operation display section OPERA TE /STOP (ON /OFF) button TEMPERA TURE buttons OPERA TION SELECT butt[...]

  • Page 4

    SPECIFICA TION 4 3 Indoor model Function Power supply Air flow (High/Med./Low) Running current Power input Power factor Model Current Winding resistance (at 20 : ) Dimensions W O H O D Weight Air direction Sound level (High/Med./Low) Fan speed (High/Med./Low) Fan speed regulator Remote controller model K /h A W % A " mm kg dB rpm Single phase [...]

  • Page 5

    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- 0.5m Gas line [ 12-0.43m Insulation [ 50 O.D [ 32[...]

  • Page 6

    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 CAPACITOR FUSE (3.15A) DC/DC CONVERTER FAN MOTOR (IN[...]

  • Page 7

    7 REFRIGERANT SYSTEM DIAGRAM 6 Refrigerant flow in cooling Refrigerant flow in heating Strainer #50 MSH-A18ND INDOOR UNIT Indoor heat exchanger Room temperature thermistor RT1 1 Refrigerant pipe [ 12.7 (with heat insulator) Flared connection Flared connection Indoor coil thermistor RT12 Refrigerant pipe [ 6.35 (with heat insulator) Distributor Stra[...]

  • Page 8

    8 SER VICE FUNCTIONS 7 When the indoor unit is controlled with the remote controller , the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P .C. board. “ Auto restart function ” automatically starts operation in the same mode just before the shutoff of the main power . However if the unit is ope[...]

  • Page 9

    9 How to release “ AUTO REST ART FUNCTION ” 1 T urn 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 CN1 12 C N 111 CN121 SW1 IC101 RA102 [...]

  • Page 10

    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. T ake care of the following during servicing (1) Before servicing the air conditioner , be sure to first turn of f the remote controller to stop the[...]

  • Page 11

    11 Start Indoor unit operates. Outdoor unit doesn't operate. Indoor unit doesn't receive the signal from remote controller . Indoor unit operates. Outdoor unit doesn't operate normally . OPERA TION INDICA TOR lamp on the indoor unit is flashing on and off. Outdoor unit operates when the EMERGENCY OPERA TION switch is pressed. Outdoor[...]

  • Page 12

    12 8-3. T roubleshooting 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[...]

  • Page 13

    13 MSH-A18ND MSH-A24ND Part name Figure Check method and criterion Indoor fan motor(MF) MSH-A18ND INNER FUSE 145 : CUT OFF MSH-A24ND INNER PROTECTOR 135 i 5 : OPEN Color of lead wire WHT – BLK BLK – RED MSH-A18ND 198 " ~ 214 " 209 " ~ 227 " Measure the resistance with a tester . (Part temperature 10 ˚ C ~ 30 ˚ C) Normal 8 [...]

  • Page 14

    14 Ye s Ye s Check of indoor fan motor A Check of remote controller and receiver P .C. board B When OPERA TION INDICA TOR lamp flashes 3-time. Indoor fan motor doesn ’ t operate. Repair or replace the indoor fan motor . Disconnect lead wires from connector CN21 1 on the indoor electronic control P .C. board. Measure resistance between lead wires [...]

  • Page 15

    15 Check of indoor electronic control P .C. board C Check the both “ par ts 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 " ? Is winding resistance of va[...]

  • Page 16

    16 How to check mis-wiring D 1. T urn 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. T urn ON the power supply (outdoor unit) and press EMERGENCY OPERA TION switch once. During EMERGENCY OPERA TION, is there 10V DC between both ends of R6[...]

  • Page 17

    17 8-6. T est point diagram and voltage MSH-A18ND MSH-A24ND Indoor electronic control P .C. board Indoor coil thermistor(RT12(main), RT13(sub)) Room temperature thermistor (RT1 1) Resistance(k " ) Fan motor power supply Fuse (F1 1) 250V AC 3.15A } Power supply input 220V AC + } 5V DC Indoor coil thermistor(RT12(main)) T imer short mode point ([...]

  • Page 18

    18 DISASSEMBL Y INSTRUCTIONS 9 MSH-A18ND MSH-A24ND INDOOR 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 terminal slowly . The terminal which has the l[...]

  • Page 19

    19 OPERA TING PROCEDURE PHOTOS Photo 4 Photo 6 V ane motors Indoor coil thermistor 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 (CN21 1 and CN121) and the vane motor connector (C[...]

  • Page 20

    20 P ARTS LIST (non-RoHS compliant) 10 MSH-A18ND MSH-A24ND 10-1. INDOOR UNIT STRUCTURAL P ARTS MSH-A24ND - S1 MSH-A18ND - S1 E02 527 970 E02 685 234 E02 888 000 E02 408 142 E02 685 067 E02 888 010 E02 534 100 E02 685 975 E02 888 007 INST ALLA TION PLA TE BOX FRONT P ANEL ASSEMBL Y CA TCH SCREW CAP GRILLE CA TECHIN AIR FIL TER AIR CLEANING FIL TER C[...]

  • Page 21

    21 E02 527 302 E02 408 509 E02 001 504 E02 408 702 E02 996 235 E02 685 040 E02 685 041 E02 A49 382 E02 817 385 E02 527 034 E02 A17 300 E02 527 300 E02 448 303 E02 408 303 E02 817 333 E02 527 333 E02 528 329 E02 527 468 E02 A17 452 E02 A18 452 E02 527 308 E02 814 375 E02 408 307 E02 527 307 E02 528 034 E02 529 034 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15[...]

  • Page 22

    22 Air cleaning filter (White bellows type) 10-5. AIR CLEANING FIL TER ● AIR CLEANING FIL TER removes fine dust of 0.01 micron from air by means of static electricity . ● Normal life of AIR CLEANING FIL TER is 4 months. However , when it becomes dirty , replace it as soon as possible. ● Clogged AIR CLEANING FIL TER may reduce the air conditio[...]

  • Page 23

    23 RoHS P ARTS LIST (RoHS compliant) 11 MSH-A18ND MSH-A24ND 1 1-1. INDOOR UNIT STRUCTURAL P ARTS MSH-A24ND - S1 MSH-A18ND - S1 E12 527 970 E12 685 234 E12 888 000 E12 408 142 E12 685 067 E12 888 010 E12 534 100 E12 685 975 E12 888 007 INST ALLA TION PLA TE BOX FRONT P ANEL ASSEMBL Y CA TCH SCREW CAP GRILLE CA TECHIN AIR FIL TER AIR CLEANING FIL TER[...]

  • Page 24

    24 E12 527 302 E12 408 509 E12 001 504 E12 408 702 E12 996 235 E12 685 040 E12 685 041 E12 A49 382 E12 817 385 E12 527 034 E12 A17 300 E12 527 300 E12 448 303 E12 408 303 E12 817 333 E12 527 333 E12 528 329 E12 527 468 E12 A17 452 E12 A18 452 E12 527 308 E12 814 375 E12 408 307 E12 527 307 E12 528 034 E12 529 034 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15[...]

  • Page 25

    25 Air cleaning filter (White bellows type) 1 1-5. AIR CLEANING FIL TER ● AIR CLEANING FIL TER removes fine dust of 0.01 micron from air by means of static electricity . ● Normal life of AIR CLEANING FIL TER is 4 months. However , when it becomes dirty , replace it as soon as possible. ● Clogged AIR CLEANING FIL TER may reduce the air conditi[...]

  • Page 26

    26 OB427B-1.qxp 07.5.16 3:30 PM Page 26[...]

  • Page 27

    27 OB427B-1.qxp 07.5.16 3:30 PM Page 27[...]

  • Page 28

    New publication, effective May 2007 Specifications subject to change without notice. C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,L TD Distributed in May 2007. No.OB427 REVISED EDITION-B 6 Distributed in Feb. 2006. No.OB427 REVISED EDITION-A 106 Distributed in Nov . 2005. No.OB427 106 Made in Japan HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOU[...]