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Mitsubishi Electronics MUM18NW manual

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Table of contents for the manual

  • Page 1

    TECHNICAL & SER VICE MANUAL DUCTLESS SPLIT -TYPE AIR CONDITIONERS CONTENTS 1. FEA TURES ·························································2 2. TECHNICAL CHANGES ····································3 3. P ART NAMES AND FUNCTIONS ·········[...]

  • Page 2

    2 1 FEA TURES This “2 to 1” Multi system consists of a single outdoor unit with two compressors that permit up to two indoor units to be installed separate rooms, each with its own controller . 1.SP ACE-SA VING LA YOUT T wo indoor units are served by a single outdoor unit whose installation requires only minimum space. This allows equipment ins[...]

  • Page 3

    3 2 TECHNICAL CHANGES 3 P ART NAMES AND FUNCTIONS OUTDOOR UNIT MUM18NW MSM18EW ➔ MSM18NW 1. Indoor unit has been changed. 2. Outdoor unit has been changed. 3. Remove controller has been changed. (The timer function was changed to the clock timer function.) 4. Indoor auto vave has been adopted. 5. Outdoor fan motor has been changed. (SGW-60F-AC ?[...]

  • Page 4

    4 4 SPECIFICA TIONS Model MSM18NW SINGLE DOUBLE Cooling capacity w 1 BTU/h 8,400 8,400 ✕ 2 850 1,700 9.9 10.0 MS09NW ✕ 2 White 1 15,60,1 15 0.5 0.37 208-265-328 177-226-279 – 5/8 32-1/16 7-3/16 10-13/16 18 Max. 49 Max. 25 Flared Flared 3/8 1/4 Not supplied (optional parts) 12V DC Wireless type 122 23-7/8 1 1-7/16 (12-5/8) 33-1/2 Capillary tub[...]

  • Page 5

    Models Indoor air Outdoor intake air DB temperature ( ˚F ) MS09NW 71 67 63 TC 10.3 9.74 9.16 SHC 5.93 6.91 7.72 TPC 0.76 0.71 0.68 TC 9.61 9.07 8.48 SHC 5.55 6.44 7.16 TPC 0.83 0.79 0.75 TC 9.03 8.4 7.9 SHC 5.21 5.95 6.66 TPC 0.89 0.85 0.81 TC 8.4 7.81 7.18 SHC 4.84 5.55 6.06 TPC 0.94 0.90 0.87 TC 7.73 7.18 6.55 SHC 4.46 5.10 5.53 TPC 0.98 0.94 0.[...]

  • Page 6

    6 3.CONDENSING PRESSURE AND SUCTION PRESURE (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT) Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the corve shows the reference point. MS09NW MUM18NW 68 40 50 60 70 80 90 100 (PSIG) 70 Outdoor ambient temperature 75 80 85 90 95 100 104 - F Suction pressure 70 86 - F 8[...]

  • Page 7

    7 Model Unit Single Double MSM18NW 8,400 8,400 ✕ 2 0.71 0.71 0.85 1.70 0.815 1.63 6.64 7.16 ✕ 2 260 270 75 75 194 191 1 16 1 18 64 54 60 60 57 57 Cooling MS09NW 1 15 . 60 . 1 0.035 ✕ 2 0.34 ✕ 2 MUM18NW 208/230 . 60 . 1(3-wire) 1.0 172 25 ✕ 2 1lds 14oz ✕ 2 80 67 1,230 279 95 — 900 1,150 Btu/h — kW kW A kW A A psi . G psi . G ˚F ˚F [...]

  • Page 8

    8 4.OPERA TING RANGE ( 1 ) POWER SUPPL Y ( 2 ) OPERA TION 5.ADDITIONAL REFRIGERANT CHARGE (R-22(oz)) Indoor unit 1 15V 60Hz 1 [ 208/230V 60Hz 1 [ (3wires) Min. 198V 208V 230V Max. 253V Min. 103v—Max. 127V Outdoor unit MS09NW MUM18NW Models Rating Guaranteed V oltage Function Cooling Indoor Outdoor 78% – DB (˚F) 80 95 67 Standard temperature[...]

  • Page 9

    9 6 OUTLINES AND DIMENSIONS MODEL : MUM18NW OUTDOOR UNIT REAR VIEW Unit center Refrigerant pipe(Flared) { 3/8 Refrigerant pipe(Flared) { 1/4 7/8 Wiring hole { 3-7/8 NOTE : The symbol { indicates diameter . 12-1/4 13-1/2 1 1-7/16 1-3/16 1-3/16 2-3/8 5-1/4 33-1/2 1/4 1-3/16 12-7/8 5-1/8 10-1/8 8 5-13/16 2 2 19-1 1/16 Unit center 12-5/16 23-7/8 6-5/8 [...]

  • Page 10

    10 7 WIRING DIAGRAM OUTDOOR MODEL MUM18NW WIRING DIAGRAM F NR 1 15V 3 4 BLK BRN 2 1 BLU GRY N ❈ ❈ ❈ BLK ORN YL W X2 X1 2 2 6 6 4 4 YL W BLU L2 BLU RED TB3 TO INDOOR UNIT No.B CONNECTING WIRES DC12V 2 52 C2 GRY VL T 2 1 TO INDOOR UNIT No.A CONNECTING WIRES DC12V 2 1 52 C1 ORN BRN 2 1 TB2 X2 X1 5 5 3 3 WHT RED RED GROUND C3 7 7 8 8 X1 X2 52C1 5[...]

  • Page 11

    11 8 REFRIGERANT SYSTEM DIAGRAM MS09NW ✕ 2/ MUM18NW Unit : inch Indoor unit Outdoor unit Indoor heat exchanger Indoor coil thermistor RT12 Room temperature thermistor RT1 1 Flared connection Flared connection Refrigerant pipe [ 1/4 (Option) (with heat insulator) Ball valve with service port Refrigerant pipe [ 3/8 (Option) (with heat insulator) Ba[...]

  • Page 12

    12 9 TROUBLESHOOTING MUM18NW 9-1 Cautions on troubleshooting 9-1-1 Before troubleshooting, check the followings: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 9-1-2 T ake care the followings during servicing. 1) Befor servicing the air conditioner , be sure to first turn off the remote controller to [...]

  • Page 13

    13 Compressor and outdoor fan do not operate.(Only indoor fan operates.) Check of outdoor unit Press EMERGENCY ON/OFF button. 3-minute time delay works. T est mode operates for 30 minutes. Check the outdoor fan motor , compressor , relay , contactor , and wiring. T urn on outdoor power supply . No No Check the indoor , outdoor connection. Check vol[...]

  • Page 14

    14 10 DISASSEMBL Y INSTRUCTIONS OUTDOOR UNIT MUM18NW 1. Removing of the cabinet (1)Remove the set screws of the valve cover to remove the valve cover as shown in Photo 2. (2)Remove the set screws of the side panel to remove the side panel and cabinet. 2. Removing the propeller (1)Remove the propeller nut. (2)Loosen the propeller in the rotating dir[...]

  • Page 15

    15 OPERA TING PROCEDURE PHOTOS Photo 5 Photo 6 3. Removing the outdoor fan motor . (1) Remove the cabinet. (Refer to 1) (2) Remove the propeller . (Refer to 2) (3) Disconnect the connector remove the clamp of out- door fan motor lead wire. (4) Remove the screws fixing the outdoor fan motor . Set screws of the relay panel Clamp Connector Screws Clam[...]

  • Page 16

    16 OPERA TING PROCEDURE PHOTOS Photo 7 Photo 8 4. Removing the compressor (1)Disconnect the cord connector . (See Phot 5) (2)Remove the set screws of the relay panel. (3)Remove the set nuts of the terminal cover . (4)Pull up the compressor . (5)Pull out the lead wires from the compressor terminal to remove overcurrent relay . (6)Remove set nuts of [...]

  • Page 17

    17 1 1 P ARTS LIST OUTDOOR UNIT P ARTS MUM18NW Refer to MS09EW for indoor unit. No. Parts No. Remarks Parts Name Symbol in Wiring Diagram Q , ty/unit MUM18NW 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 16 17 18 19 20 21 22 23 24 T2W 382 342 T2W 462 232 T2W 667 249 T2W 739 245 T2W 466 509 T2W A75 301 R01 093 1 15 T2W 903 353 T2W 466 342 T2W E47 378 T2W 464[...]

  • Page 18

    18 12 OPTIONAL P ARTS 10ft 16ft 23ft 33ft 3/8 1/4 C 13/16 D 1-1/16 MAC - 440PI MAC - 441PI MAC - 442PI MAC - 443PI MS09NW 0 1 Pipe length Cross-section Part No. Model A-Gas B-Liquid Pipe size O.D Insulation Additional refrigerant charge R-22(Oz) 1. REFRIGERANT PIPES The air conditioner has flared connections its indoor and outdoor sides. Please use[...]

  • Page 19

    OB202-1.qxp 26/9/97 11:08 AM Page 19[...]

  • Page 20

    New publication, effective Sep. 1997. Specifications subject to change without notice. The Slim Line. From Mitsubishi Electric. L I S T E D R C Copyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,L TD. Issued in Sep. 1997 NO.OB202 501 1 OB202-1.qxp 26/9/97 11:08 AM Page 20[...]

  • Page 21

    3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 Toll Free: 800-433-4822 ● Toll Free Fax: 800-889-9904 www.mrslim.com Specifications are subject to ch ange without notice.[...]