Mitsubishi MSH-24NV- Manuals

5 (When installed on the floor) (When installed on the ceiling) 50cm or more 50cm or more 50cm or more 50cm or more 100cm or more 650 616.5 80.8 906 112.8 114 16 1100 93 77 113 143 180 170 42.5 160 56 17.5 { 15.88 Gas line { 9.52 Liquid line OUTLINES AND DIMENSIONS 4 INDOOR UNIT MCFH-24NV - EB Unit:...

TRANSFORMERCONTACTORR.V. COIL RELAYR.V. COILCOMPRESSOR CONTACTOR T61 X52X62 21S4 52 VARISTORDEFROST TEMPERATURE THERMISTORAMBIENT TEMPERATURE THERMISTORSOLID STATE RELAYSOLID STATE RELAY TERMINAL BLOCK NR61 RT61RT63 SR61SR62 TB C1C2 DSAR F61 MC MF COMPRESSOR CAPACITORFAN MOTOR CAPACITORSURGE ABSORBE...

REFRIGERANT SYSTEM DIAGRAM 8 6 Models A: Refrigerant piping Max.length 15m Max. Height difference * 5m MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE MCFH-24NV - EB Refrigerant piping MAX. length : m A 15 Piping size O.D. : mm Gas Liquid { 15.88 w It does not matter which unit is higher...

9 PERFORMANCE CURVES 7 The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition.Operating conditions vary according to the areas where these units are installed. The following information has been provided toclarify the operating c...

10 Dry Bulb temperature ( ˚C ) 202530 Relative humidity ( % ) 506070 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 Both indoor and outdoor units are under the same temperature/humidity condition. 2 Air flow should be set at MAX.. 3 The unit of pressure has been changed to MPa on the...

11 MICROPROCESSOR CONTROL 8 WIRELESS REMOTE CONTROLLER MCFH-24NV - MUCFH-24NV - EB EB Once the operation mode are set, the same operation modecan be repeated by simply turning the OPERATE/STOP buttonON.Indoor unit receives the signal with a beep tone.When the system turns off, 3-minute time delay wi...

12 w 1 After the system restarts by the remote controller, the system operates with the previous set temperature regardless of the initial set temperature.The set temperature is calculated by the previous set temperature. (5) TEMPERATURE buttons In “I FEEL CONTROL” mode, set temperature is decided b...

13 NOTE : Coil frost prevention during COOL mode of “I FEEL CONTROL” There are two types of controls in coil frost prevention as follows. 1 Temperature control When the indoor coil thermistor RT12 reads -1°C or below, the coil frost prevention mode starts immediately.However the coil frost preventio...

14 — HEAT mode of “I FEEL CONTROL” — 1. Indoor fan speed control (1) Followings are the fan speed in AUTO. Room temperature minus set temperature: 2 degrees or more ·········································HighRoom temperature minus set temperature: 1 degree or more and less than 2 degrees···Med.Roo...

15 2. High pressure protection During heating operation, the outdoor fan motor is controlled by the indoor coil thermistor RT12 temperature for excess riseprotection of compressor discharge pressure.Outdoor fan OFF : OFF Outdoor fan ON : ON NOTE : When the outdoor fan is OFF in heating, defrosting o...

18 8-5. AUTO VANE OPERATION (1) Vane motor drive This series is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of the motor arecontrolled by pulse signals (approx. 12V, transmitted from indoor microprocessor.) (2) Each time the VANE CONTROL button is pressed, a...

19 8-6. TIMER OPERATION 1. How to set the timer (1) Press OPERATE/STOP button to start the air conditioner.(2) Check that the current time is set correctly.NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display of TIME MONITOR, so...

21 SERVICE FUNCTIONS 9 MCFH-24NV - EB 9-1. 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.3-minute time delay : 3-minute → 3-second. AUTO START : 1 hour → 1-minute AUTO STOP : 1 hour →...

22 9-3. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JPG1 and R871 on the outdoor deicer P.C. board, defrosting mode can be accomplishedregardless of the defrost interval restriction. See Page 33.Defrost thermistor RT61 must be below -3 : . 9-4. DEFROST TERMINATION CHANGE...

23 TROUBLESHOOTING 10 MCFH-24NV - MUCFH-24NV - EB EB 10-1. Cautions on troubleshooting 10-1-1. Before troubleshooting, check the followings: 1) Check the power supply voltage.2) Check the indoor/outdoor connecting wire for mis-wiring. 10-1-2. Take care the followings during servicing. 1) Be sure to ...

27 Yes Yes Check of indoor fan motor A Indoor unit operates by pressing the EMERGENCY OPERATION switch, but doesn’t operate with the remote con-troller. Replace the batteries.(Refer to page 23.) Turn on a radio to AM and press switch onthe remote controller. Is noise heard from radio? Are there any ...

Trouble of the indoor electroniccontrol P.C. board. Replace the varistor. Replace the fuse. 28 Check of indoor electronic control P.C. board C The unit doesn’t operate with theremote controller.Also, the OPERATION INDICATORlamp doesn’t light up by pressingthe EMERGENCY OPERATIONswitch. Yes Check bot...

29 Check of outdoor unit E Compressor and / or outdoor fan motor doesn’t stop. Check of R.V. coil F After 30 seconds, does compressor stop? No Yes Is there 220-240V AC between A1-A2 on the compressor contactor? Replace the deicer P.C. board. Yes 1 Turn OFF the power supply. 2 After 30 seconds, turn ...

30 How to check mis-wiring and serial signal error (when outdoor unit doesn’t work) G Yes Yes 1. Turn OFF the power supply.2. Turn ON the power supply.3. Press the EMERGENCY OPERATION switch. 3 min. later, when Indoor 52C contactor turns ON, what self-check resultis displayed on OPERATION INDICATOR ...

31 Check of outdoor thermistor Measure resistance between CN 661 1 and 2 . Measure resistance between CN 662 3 and 4 . No Yes Replace the thermistor. Reconnect CN661 and CN662.Turn ON the power supply and press the EMERGENCY OPERATION switch. Does the resistance of thermistor have the characteristic...

32 DE00R697B To the indoorelectronic controlP.C.board CN113 Indoor coil thermistor (RT12)Room temperature thermistor (RT11) RT11 EMERGENCY OPERATION switch TH113 CH313 GILMS 1 2 0 0 10 20 30 40 10 20 30 40 50 60 Temperature ( C) Resistance (K ' ) TEST POINT DIAGRAM AND VOLTAGEMCFH-24NV - EB Indoor e...

33 MUCFH-24NV -Outdoor deicer P.C. board EB Varistor(NR62) Fuse 3.15A / 250V Defrostintervaltime shortpin(JPG1,R871)(Refer topage 22.) } 12V DC Jumper wire forchange in defrostsetting (JRF, JRG)(Refer to page 22.) } 5V DC + + CN661 1 - 2 Defrost ther-mistor (RT61) (Refer to page 31.) Defrost thermis...

34 DISASSEMBLY INSTRUCTIONS 11 ” w ” shows the terminals with a lock mechanism, so they cannot be removed when you pull thelead wire.Be sure to pull the wire by pushing the locking lever (project part) of the terminal with a finger. 1 Slide the sleeve. 2 Pull the wire while pushing the locking lever...

35 OPERATING PROCEDURE PHOTOS 3. Removing the indoor heat exchanger. (1) Remove the grill. (Refer to 1(1) (2))(2) Remove the screws on both side and in front of the front panel. (Photo 5) (3) Remove the screws of the nozzle assembly. (Photo 6)(4) Remove the electronic box . (Refer to 1)(5) Remove th...

36 11-2. MUCFH-24NV - OUTDOOR UNIT EB OPERATING PROCEDURE PHOTOS Photo 1 Photo 2 Photo 4 Propellerfan nut Valve bed Separator support plate Motor support Propellerfan Screws of the cabinet Top panel Service panel Cover panel Cabinet Screws of the top panel Photo 3 Terminal block Deicer P.C.board 52C...

37 OPERATING PROCEDURE PHOTOS Photo 5 Photo 6 Photo 7 Stop valve Heat exchanger Accumulator Screws Screws Rearpanel Sidepanel Rear guard 4. Removing the heat exchanger and compressor (1) Remove the screws of the rear panel. Remove the screws of the valve bed and the valve bed. (The valve bed is fixe...

38 PARTS LIST 12 MCFH-24NV -12-1. INDOOR UNIT STRUCTURAL PARTS EB Part number that are circled is not shown in the illustration. No. Part No. Part name Remark WH Symbol in Wiring Diagram Q'ty/unit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 E02 227 303 E02 179 971 E02 179 100 E02 179 010 E02 179 000 E02 ...

39 MCFH-24NV- (WH) 12-3. ACCESSORY AND REMOTE CONTROLLER PARTS EB 12 11 11 12 E02 257 426 E02 141 083 REMOTE CONTROLLER REMOTE CONTROLLER HOLDER 1 1 Part numbers that are circled is not shown in the illustration. MCFH-24NV - (WH) 12-2. INDOOR UNIT ELECTRICAL PARTS EB No. Part No. Part name Remark WH...

40 MUCFH-24NV -12-4. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS EB 1 7 29 9 27 26 15 20 10 25 8 5 13 6 2 16 21 17 4 3 24 23 28 14 22 12 11 19 13 13 18 OB266--2.qxp 01.4.13 10:32 AM Page 40

41 MUCFH-24NV -12-4. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS EB E02 214 297 E02 540 309 E02 444 961 E02 529 490 E02 214 630 E02 214 301 E02 214 501 E07 070 508 E02 214 290 E02 527 662 E02 527 661 E02 214 232 E07 001 009 E02 527 521 E02 138 506 E02 042 900 E02 214 245 E07...

13 OPTIONAL PARTS 42 13-1. REFRIGERANT PIPES The air conditioner has flared connections its indoor and outdoor sides.Please use the optional extension pipe as follows. 13-3. DEODORIZING FILTER ● Clean the filter every two weeks . When it becomes too dirt , clean it more often . ● Replace the filter ...

New publication, effective Apr. 2001Specifications subject to change without notice. C C Copyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Apr. 2001. No.OB266 223Made in Japan HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN OB266--2.qxp 01....