Page 2 - TECHNICAL CHANGES
2 TECHNICAL CHANGES MSH-17NV - ➔ MSH-07NV - 1. Indoor electronic control P.C.board has changed. However, it is compatible between and models. 2. Auto restart function is added. MSH-09NV - ➔ MSH-09NV - 1. Indoor electronic control P.C.board has changed. However, it is compatible between and models. 2...
Page 3 - PART NAMES AND FUNCTIONS; INDOOR UNIT
3 PART NAMES AND FUNCTIONS 2 INDOOR UNIT MSH-07NV - MSH-07NV - MSH-09NV - MSH-09NV - MSH-12NV - MSH-12NV - E2 E1 E2 E1 E2 E1 OUTDOOR UNIT MUH-12NV -MUH-18NV -MUH-18NV -MUH-18NV - E3 E2 E1 E1 MUH-24NV -MUH-24NV - E2 E1 MUH-07NV -MUH-09NV -MUH-07NV -MUH-09NV - E2 E2 E1 E1 (When the front panel is open...
Page 4 - REMOTE CONTROLLER
4 REMOTE CONTROLLER MSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV - MSH-18NV - E2 E1 E1 E1 E1 OB207t-1qxp 25/9/97 8:51 PM Page 4
Page 6 - SPECIFICATION; Outdoor DB 7°C / WB 6°C
6 SPECIFICATION 3 Capacity Electrical data Compressor Indoor fan motor Outdoor fan motor Dimensions Weight Special remarks Model Function Power supply Coefficient of performance(C.O.P) Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Power factor Starting ...
Page 9 - are
9 Capacity Electrical data Compressor Indoor fan motor Outdoor fan motor Dimensions Weight Special remarks Model Function Power supply Coefficient of performance(C.O.P) Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compress...
Page 11 - OUTLINES AND DIMENSIONS
11 OUTLINES AND DIMENSIONS 4 MSH-07NV - MSH-09NV - MSH-07NV - MSH-09NV - E2 E2 E1 E1 MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV - E2 E2 E1 E1 INDOOR UNIT OUTDOOR UNIT Unit: mm OB207t-1qxp 25/9/97 8:51 PM Page 11
Page 15 - WIRING DIAGRAM; MODELS WIRING DIAGRAM; OUTDOOR UNIT
15 WIRING DIAGRAM 5 NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing. 2. Use copper conductors only.(For field wiring)3. Symbols below indicate. : Terminal block, : Connector MSH-07NV -MSH-09NV - E1 E1 MODELS WIRING DIAGRAM MUH-07NV -MUH-09NV - ...
Page 18 - UNIT
18 MSH-24NV - E1 MUH-24NV - E1 MODEL WIRING DIAGRAM MODEL WIRING DIAGRAM INDOOR UNIT OUTDOOR UNIT NF WHT BLU BLU 4 3 1 2 111 CN 52C CIRCUIT BREAKER RT12 IC141 112 CN HIC1 NR1 1 TRANS 220-240V~ WHT 220-240V~ REMOTE CONTROLLER 3 1 DISPLAY P.C.BOARD 101 CN 102 CN 151 CN ELECTRONIC CONTROL P.C BOARD 4 2...
Page 19 - MF; MC
19 MSH-07NV - MSH-09NV - MSH-12NV - E2 E2 E2 MUH-07NV - MUH-09NV - E2 E2 MODELS WIRING DIAGRAM MODELS WIRING DIAGRAM INDOOR UNIT OUTDOOR UNIT CIRCUIT BREAKER GUARDPLATE FOR MULTI SYSTEM TO OUTDOORUNITCONNECTING 12VDC TB F12 MV POWER MONITOR, RECEIVER P.C.BOARD REMOTE CONTROLLER POWER SUPPLY CORD ~/N...
Page 20 - MODEL WIRING DIAGRAM
20 MUH-12NV - E2 MODEL WIRING DIAGRAM OUTDOOR UNIT 21S4 SR61 CN661 CN721 X62 MC MF 52C 4 3 WHT RED BLU BLU BLK WHT ORN RED BLK WHT RED TRANS R S C C1 RED BLK 12VDC GRN/YLW T O INDOOR UNIT CONNECTING TB 220-240V~ 2 N 234 1 4 3 2 1 RT61 CN730 F61 BLK BLK X62 C65 TAB20 NR61 CN711 DEICER P.C.BOARD 1 WHT...
Page 23 - MV
23 MSH-18NV - E3 MUH-18NV - E3 MODEL WIRING DIAGRAM MODEL WIRING DIAGRAM INDOOR UNIT OUTDOOR UNIT CIRCUIT BREAKER N 2 12VDC L 50Hz CORD POWER SUPPLY ~/N 220-240V F11 NR1 1 TRANS HIC1 12VDC 220-240V~ DSAR BRN GRN/YL W LD1 DISPLAY P.C.BOARD RECEIVER P.C.BOARD 3 3 101 102 CN CN 1 TO OUTDOOR UNIT CONNEC...
Page 24 - REFRIGERANT SYSTEM DIAGRAM
24 REFRIGERANT SYSTEM DIAGRAM 6 MSH-07NV -MSH-07NV - E2 E1 MUH-07NV -MUH-07NV - E2 E1 INDOOR UNIT OUTDOOR UNIT Indoorheatexchanger Room temperaturethermistorRT11 (with heat insulator) Flared connection Flared connection Refrigerant pipe [ 9.52 (Option) Muffler Reversing valve (4-way valve) Defrostth...
Page 29 - PERFORMANCE CURVES
29 7 The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,since operating conditions vary according to the areas where these units are installed. The following information has been pro-vided to clarify the operating characteri...
Page 32 - HEAT operation; Condition indoor:Dry bulb temperature 20.0°C
32 HEAT operation Condition indoor:Dry bulb temperature 20.0°C Wet bulb temperature 14.5°C Outdoor:Dry bulb temperature 7,15,20°C Wet bulb temperature 6,12,14.5°C MUH-18NV - E3 E2 E1 Outdoor unit current (A) Outdoor unit current (A) Outdoor unit current (A) Outdoor unit current (A) Ambient temperatu...
Page 33 - MICROPROCESSOR CONTROL; Wireless remote controller; Example; INDOOR UNIT DISPLAY SECTION
33 MICROPROCESSOR CONTROL 8 Once the controls are set, the same operation mode can berepeated by simply turning the OPERATE/STOP button ON.Indoor unit receives the signal with a beep tone.When the system turns off, 3-minute time delay will operate toprotect system from overload and compressor will n...
Page 34 - TOO
34 Model COOL mode of "I FEEL CONTROL" DRY mode of "I FEEL CONTROL" HEAT mode of "I FEEL CONTROL" Initial room temperature Initial set temperature 26 : 26 : or more 26 : or less 23 : or less 23 : or 25 : 24 : Initial room temperature minus 2 : Initial room temperature minus 2...
Page 35 - NOTE : Coil frost prevention during COOL mode of “I FEEL CONTROL”; —DRY mode of “I FEEL CONTROL”—; — COOL mode of “I FEEL CONTROL” —
35 NOTE : Coil frost prevention during COOL mode of “I FEEL CONTROL” There are two types of controls in coil frost prevention. ① Temperature control <MSH-07/09/12> When the indoor coil thermistor RT12 reads 4°C or below for 5 minutes, the coil frost prevention mode starts. <MSH-18/24>Whe...
Page 36 - — HEAT mode of “I FEEL CONTROL” —; Indoor fan speed control
36 — HEAT mode of “I FEEL CONTROL” — 1. Indoor fan speed control (1) Followings are the fan speed in AUTO. Set temperature minus room temperature: 2 degrees or more ················································· HiSet temperature minus room temperature: 1 degree or more and less than 2 degrees···...
Page 37 - High pressure protection; RT12 temperature
37 NOTE 1 :When the outdoor fan is OFF in heating, defrosting of outdoor heat exchanger is not detected by the defrost thermis- tor RT61. NOTE 2 :When connected to MXZ-32NV- outdoor unit,the MSH-07/09/12NV- , MSH-07/09/12/18NV- and MSH-18NV- indoor unit sends the data for the temperature to the outd...
Page 39 - Reversing valve control
39 8-2. COOL ( ) OPERATION (1) Press OPERATE/STOP button. OPERATION INDICATOR of the indoor unit turns on with a beep tone. (2) Select COOL mode.(3) Set the TEMPERATURES button. (TOO WARM or TOO COOL button)The setting range is 16 ~ 31°C ✻ Indoor fan continues to operate regardless of thermostat’s O...
Page 40 - (1) Rotational frequency feedback control
40 SLEEP 8-6. AUTO VANE OPERATION (1) Vane motor drive MSH-N series is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor. (2) The auto vane angle changes as follows b...
Page 42 - PROGRAM TIMER
42 8-8. 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 s...
Page 44 - SERVICE FUNCTIONS; COMPULSORY DEFROSTING MODE FOR SERVICE; How to modify the remote controller P.C. board; Short the connector during the timer mode.
44 9 SERVICE FUNCTIONS 1. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JP607 and R853 on the outdoor deicer P.C. board, defrosting mode can be accomplishedregardless of the defrost interval restriction. See Page 56 and 59.Defrost thermistor RT61 must read below -3°C 2. DE...
Page 46 - How to set “AUTO RESTART FUNCTION”; Turn off the main power for the unit.; Operation; power button of the remote controller is off.; AUTO RESTART FUNCTION
46 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. The “AUTO RESTART FUNCTION” sets to work the moment powerhas restored after power failure.Then, the unit will restart auto...
Page 47 - TROUBLESHOOTING; 0-1 Cautions on troubleshooting; confirming the horizontal vane is closed, turn off the breaker.; Lead wiring; There are two kind of remote controllers.
47 10 TROUBLESHOOTING 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) Before servicing the air conditioner, be sure...
Page 48 - 0-2 Instruction of troubleshooting; trouble
48 10-2 Instruction of troubleshooting Indoor unit oper-ates. Outdoor unitdoesn’t operate. Outdoor unitoperates inonly TestRun opera-tion. Outdoor unitdoesn’t oper-ate even inTest Runoperation. Check roomtemperaturethermistor. Refer to“Check ofoutdoor unit”on page 52. Indoor unitdosen’t receivethe s...
Page 49 - Self check table
49 10-2-1 troubleshooting check table ❈ Before taking measures, make sure that the symptom reappears, for accurate troubleshooting. Self check table NO. 1 2 3 4 Abnormal point Mis-wiring Serial sig-nal Indoor coilthermistor Roomtempera-ture ther-mistor Indoor fanmotor Outdoorthermistor Indication 0....
Page 51 - Check of indoor fan motor; Inodoor fan does not operate.
51 Yes Yes Check of indoor fan motor A Check of receiver P.C. board B Inodoor fan does not operate. Repair the indoor fan motor. Disconnect lead wires from connector CN211 on indoor electronic control P.C. board.Measure resistance between lead wires No.1 and No.4 and then No.1 and No.2(MSH-18/24) No...
Page 57 - Time short mode point
57 TEST POINT DIAGRAM AND VOLTAGEMSH-07NV - MSH-09NV - MSH-12NV - MSH-07NV - MSH-09NV - MSH-12NV - Indoor electronic control P.C. board E2 E2 E2 E1 E1 E1 CN201 No1 Varistor(NR11) Fuse AC250V 3.15A Room temperaturethermistor(RT11) Indoor coil thermistor(RT12) Time short mode point P.C.board DC0~20V R...
Page 60 - DISASSEMBLY INSTRUCTIONS; OPERATING PROCEDURE; Removing the front panel
60 11 DISASSEMBLY INSTRUCTIONS 2. Removing the electronic control P.C. board and the display P.C. board. (1) Remove the front panel. (Refer to 1)(2) Remove the screw of the electrical cover. Remove the electrical cover. (3) Disconnect the room temperature thermistor and the con- nector from the indo...
Page 61 - Drain hose
61 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (1) Remove the front panel. (Refer to 1)(2) Remove the electrical cover.(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 ...
Page 63 - Removing the electrical box
63 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (1) Remove the front panel. (Refer to 1)(2) Remove the electrical cover.(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 ...
Page 64 - Propeller fan
64 11-3 MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV - OUTDOOR UNIT E2 E2 E1 E1 OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the top panel.(2) Remove the cabinet 2. Remove the deicer P.C. board (1) Remove the top panel, the service panel and the cabinet.(2) Disconnect all the connector...
Page 66 - Removing the cabinet
66 OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the cabinet.(2) Hold the down of the cabinet on the both side to remove the cabinet. 2. Removing the deicer P.C. board (1) Remove the service panel and the cabinet.(2) Disconnect all the connectors and the terminals on th...
Page 67 - Removing the outdoor fan motor; Terminal cover; Photo 4; propeller fan
67 OPERATING PROCEDURE PHOTOS 3. Removing the outdoor fan motor (1) Remove the cabinet. (Refer to 1)(2) Disconnect the connector remove the clamp of fan motor lead wire. (3) Remove the propeller nut and remove the propeller.(4) Remove screws securing the fan motor. 4. Removing the compressor (1) Rem...
Page 68 - Removing the electrical parts; Photo 1; Photo 3
68 OPERATING PROCEDURE PHOTOS 1. Removing the electrical parts (1) Remove the screws and the top panel.(2) Remove the screw of the cover panel. To remove the cover panel, pull it toward you and unhook the catch-es from the side panel. (3) Remove the screw of the service panel. To remove the service ...
Page 69 - Removing the heat exchanger and the compressor
69 OPERATING PROCEDURE PHOTOS 3. Removing the heat exchanger and the compressor (1) Remove the rear panel.Remove the valve bed, and open the rear panel to the rear to remove. NOTE : All panels are fixed by catches, and must be removed byshifting up and down. (2) Remove the screws of the right side p...
Page 70 - PARTS LIST; Optional parts
70 12 PARTS LIST 1 2 3 4 5 6 E02 154 000 E02 157 000 E02 199 000 E02 151 010 E02 164 100 E02 151 234 E02 166 234 E02 151 970 E02 166 067 FRONT PANEL(WH) FRONT PANEL(WH) FRONT PANEL(WH) GRILL(WH) AIR FILTER BOX(WH) BOX(WH) INSTALLATION PLATE SCREW CAP(WH) Symbol in Wiring Diagram Q'ty/unit 1 1 2 1 1 ...
Page 71 - Part number that are circled is not shown in the illustration.
71 Symbol in Wiring Diagram Q'ty/unit Remarks Part No. NO. Part Name MSH-07NV- (WH) E1 E2 MSH-09NV- (WH) E1 E2 MSH-12NV- (WH) E1 E2 E02 166 235 E02 166 040 E02 141 702 E02 151 303 E02 151 300 E02 151 505 E02 151 302 E02 151 509 E02 151 308 E02 151 307 E02 198 375 E02 199 450 E02 200 450 E02 201 450 ...
Page 80 - AIR CLEANING FILTER; DO NOT reuse AIR CLEANING FILTER even if it is washed.; DEODORIZING FILTER; Replace the filter at least once a year.; Model; OPTIONAL PARTS
New publication, effective Sep. 1997Specifications subject to change without notice. C C Copyright 1997 MITSUBISHI ELECTRIC ENGINIEERING CO.,LTD Issued in Sep. 1997. No.OB207 646Printed in Japan HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO 9.52 (3/8) 12.7 (1/2...
