Table of Contents
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INDOOR UNIT
SERVICE MANUAL
Models
MSZ-LN18VGW
MSZ-LN18VGV
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MSZ-LN18VGB
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MSZ-LN18VGR
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MSZ-LN18VG2W
MSZ-LN18VG2V
MSZ-LN18VG2B
MSZ-LN18VG2R
MSZ-LN25VGW
MSZ-LN25VGV
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MSZ-LN25VGB
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MSZ-LN25VGR
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MSZ-LN25VG2W
MSZ-LN25VG2V
MSZ-LN25VG2B
MSZ-LN25VG2R
MSZ-LN35VGW
MSZ-LN35VGV
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MSZ-LN35VGB
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MSZ-LN35VGR
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MSZ-LN35VG2W
MSZ-LN35VG2V
MSZ-LN35VG2B
MSZ-LN35VG2R
MSZ-LN25VGW/V/B/R
MSZ-LN35VGW/V/B/R
MSZ-LN50VGW/V/B/R
MSZ-LN60VGW/V/B/R
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Revision C:
• MSZ-LN18VG2W/V/B/R-
MSZ-LN25VG2W/V/B/R-
MSZ-LN35VG2W/V/B/R-
MSZ-LN50VG2W/V/B/R-
and MSZ-LN60VG2W/V/B/R-
have been added.
OBH766 REVISED EDITION-B is void.
MSZ-LN50VGW
MSZ-LN50VGV
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MSZ-LN50VGB
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MSZ-LN50VGR
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MSZ-LN50VG2W
MSZ-LN50VG2V
MSZ-LN50VG2B
MSZ-LN50VG2R
MSZ-LN60VGW
MSZ-LN60VGV
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MSZ-LN60VGB
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MSZ-LN60VGR
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MSZ-LN60VG2W
MSZ-LN60VG2V
MSZ-LN60VG2B
MSZ-LN60VG2R
Outdoor unit service manual
MUZ-LN•VG Series (OBH767)
MUZ-LN•VGHZ Series (OBH768)
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 4
4. NOISE CRITERIA CURVE ································ 6
5. OUTLINES AND DIMENSIONS ························ 9
6. WIRING DIAGRAM ·········································· 10
7. REFRIGERANT SYSTEM DIAGRAM ············· 13
8. SERVICE FUNCTIONS ··································· 14
9. MICROPROCESSOR CONTROL ··················· 16
10. TROUBLESHOOTING ····································· 27
11. DISASSEMBLY INSTRUCTIONS ···················· 43
PARTS CATALOG (OBB766)
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No. OBH766
REVISED EDITION-C
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric MUZ-LN VG Series
Summary of Contents for Mitsubishi Electric MUZ-LN VG Series
- Page 1 Revision C: • MSZ-LN18VG2W/V/B/R- MSZ-LN25VG2W/V/B/R- MSZ-LN35VG2W/V/B/R- MSZ-LN50VG2W/V/B/R- and MSZ-LN60VG2W/V/B/R- have been added. OBH766 REVISED EDITION-B is void. INDOOR UNIT No. OBH766 SERVICE MANUAL REVISED EDITION-C Models MSZ-LN18VGW MSZ-LN50VGW MSZ-LN18VGV MSZ-LN50VGV MSZ-LN18VGB MSZ-LN50VGB MSZ-LN18VGR MSZ-LN50VGR MSZ-LN18VG2W MSZ-LN50VG2W MSZ-LN18VG2V MSZ-LN50VG2V MSZ-LN18VG2B MSZ-LN50VG2B MSZ-LN18VG2R MSZ-LN50VG2R MSZ-LN25VGW...
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Page 2: Technical Changes
Use the specified refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN50VGV MSZ-LN60VGV MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN50VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN50VGR MSZ-LN60VGR MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN50VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN50VG2V MSZ-LN60VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN50VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN50VG2R MSZ-LN60VG2R Air purifying Air inlet device... -
Page 4: Specification
SPECIFICATION MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN50VGV MSZ-LN60VGV Indoor model MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN50VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN50VGR MSZ-LN60VGR Power supply Single phase 230 V, 50 Hz Cooling Power input *1 Heating Cooling 0.21 0.23 0.28 0.37 Running current Heating... - Page 5 MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN50VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN50VG2V MSZ-LN60VG2V Indoor model MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN50VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN50VG2R MSZ-LN60VG2R Power supply Single phase 230 V, 50 Hz Cooling Power input *1 Heating Running current Cooling 0.21 0.23 0.28 0.37 Heating...
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Page 6: Noise Criteria Curve
NOISE CRITERIA CURVE MSZ-LN18VGW MSZ-LN18VGB MSZ-LN18VG2W MSZ-LN18VG2B MSZ-LN18VGV MSZ-LN18VGR MSZ-LN18VG2V MSZ-LN18VG2R FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 NC-10 NC-10... - Page 7 MSZ-LN35VGW MSZ-LN35VGB MSZ-LN35VG2W MSZ-LN35VG2B MSZ-LN35VGV MSZ-LN35VGR MSZ-LN35VG2V MSZ-LN35VG2R FUNCTION SPL(dB(A)) FAN SPEED LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 NC-10 NC-10 1000 2000 4000...
- Page 8 MSZ-LN60VGW MSZ-LN60VGB MSZ-LN60VGV MSZ-LN60VGR MSZ-LN60VG2W MSZ-LN60VG2B MSZ-LN60VG2V MSZ-LN60VG2R FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING Super High HEATING NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 NC-10 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz INDOOR UNIT Test conditions WALL Cooling: Dry-bulb temperature 27 °C Wet-bulb temperature 19 °C Heating: Dry-bulb temperature 20 °C 0.8m...
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Page 9: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN50VGV MSZ-LN60VGV MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN50VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN50VGR MSZ-LN60VGR MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN50VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN50VG2V MSZ-LN60VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN50VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN50VG2R MSZ-LN60VG2R Unit: mm INSTALLATION PLATE 11×20 OBLONG HOLE... -
Page 10: Wiring Diagram
WIRING DIAGRAM MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN60VGV MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN60VGR MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN60VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN60VG2R OBH766C... - Page 11 MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN60VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN60VG2R PARÇA ADI SİGORTA (T3.15AL250V) FAN MOTORU KANAT MOTORU (YATAY) KANAT MOTORU İÇ ÜNİTE GÜÇ (DİKEY) KARTI i-see SENSÖR MOTORU DIŞ ÜNİTEYE VARİSTÖR RESİSTÖR EKRAN KAYDEDİCİ...
- Page 12 MSZ-LN50VG2W MSZ-LN50VG2V MSZ-LN50VG2B MSZ-LN50VG2R MSZ-LN50VG2W MSZ-LN50VG2V MSZ-LN50VG2B MSZ-LN50VG2R PARÇA ADI SİGORTA (T3.15AL250V) FAN MOTORU KANAT MOTORU (YATAY) İÇ ÜNİTE GÜÇ KANAT MOTORU KARTI (DİKEY) DIŞ ÜNİTEYE i-see SENSÖR MOTORU VARİSTÖR EKRAN KAYDEDİCİ DEVRE KARTI REAKTÖR SİVİÇ/ ODA SICAKLIK BUZZER TERMİSTÖRÜ KARTI Wİ-Fİ...
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Page 13: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV Unit: mm MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R Refrigerant pipe ø9.52 (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection... -
Page 14: Service Functions
SERVICE FUNCTIONS MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN50VGV MSZ-LN60VGV MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN50VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN50VGR MSZ-LN60VGR MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN50VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN50VG2V MSZ-LN60VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN50VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN50VG2R MSZ-LN60VG2R 8-1. -
Page 15: Auto Restart Function
Electric’s MELCloud Wi-Fi service. Third party Wi-Fi interfaces cannot be connected to MELCloud. Mitsubishi Electric is not responsible for any (i) under performance of a sys- (1) MODE switch tem or any product; (ii) system or product fault; or (iii) loss or damage to any •... -
Page 16: Microprocessor Control
8-6. CHANGING THE CORRECTION VALUE OF THE ROOM TEMPERATURE Cut the jumper wire JR24 when the room temperature does not reach the set temperature during heating opera- tion. (Refer to 10-7.) Cutting the jumper wire JR24 changes the correction value of the room temperature during heating operation from °C to -5 °C... - Page 17 MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN50VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN50VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN50VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN50VG2R WIRELESS REMOTE CONTROLLER Signal transmitting section Distance of signal : About 6 m Beep(s) is (are) heard from the indoor unit when the signal is received. FAN SPEED CONTROL button OPERATION SELECT button WIDE VANE button...
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Page 18: Dry Operation
9-1. COOL ( ) OPERATION (1) Press STOP/OPERATE (OFF/ON) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons TEMP button to select the desired temperature. The setting range is 16 - 31°C. 1. - Page 19 NOTE 1: If 2 or more indoor units are operating in multi system, there might be a case that the indoor unit, which is operating in (AUTO), cannot change over to the other operating mode (COOL ↔ HEAT) and becomes a state of standby. Refer to NOTE 2 “FOR MULTI SYSTEM AIR CONDITIONER”.
- Page 20 (7) SWING ( ) mode By selecting SWING mode with VANE CONTROL button, the horizontal vanes swing vertically. When COOL, DRY or FAN mode is selected, only the upper vane swings. (8) Cold air prevention in HEAT operation The horizontal vane position is set to Upward. NOTE: When 2 or more indoor units are operated with multi outdoor unit, even if any indoor unit turns thermostat off, this control does not work in the indoor unit.
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Page 21: Timer Operation
9-7. TIMER OPERATION 1. How to set the time (1) Check that the current time is set correctly. NOTE: Timer operation will not work without setting the current time. Initially “0:00” blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK button. How to set the current time (a) Press the CLOCK button. -
Page 22: Weekly Timer Operation
9-8. WEEKLY TIMER OPERATION • A maximum of 4 ON or OFF timers can be set for individual days of the week. • A maximum of 28 ON or OFF timers can be set for a week. NOTE: The simple ON/OFF timer setting is available while the weekly timer is on. In this case, the ON/OFF timer has priority over the •... - Page 23 (4) Press button to complete and transmit the weekly timer setting. which was blink- ing goes out, and the current time will be displayed. NOTE: • Press button to transmit the setting information of weekly timer to the indoor unit. Point the remote controller toward the indoor unit for 3 seconds.
- Page 24 ABSENCE DETECTION ( ) This function automatically changes the operation to No occupancy energy-saving mode or No occupancy Auto-OFF mode when nobody is in the room. (1) To activate this No occupancy energy-saving mode, press SENSOR button until appears on the operation display of the remote controller.
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Page 25: Air Purifying Operation
9-11. NIGHT MODE ( ) OPERATION NIGHT MODE changes the brightness of the operation indicator, disables the beep sound and limits the noise level of the outdoor unit. (1) Press NIGHT MODE button during operation to activate NIGHT mode ( ). •... - Page 26 9-14. OPERATION LOCK This function locks operation mode only. Other functions, such as OFF/ON, temperature setting, or airflow direction adjustment, are available. (1) Hold down button and button simultaneously for 2 seconds while the unit is not operating to enable OPERATION LOCK.
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Page 27: Troubleshooting
TROUBLESHOOTING MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN50VGV MSZ-LN60VGV MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN50VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN50VGR MSZ-LN60VGR MSZ-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W MSZ-LN50VG2W MSZ-LN60VG2W MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V MSZ-LN50VG2V MSZ-LN60VG2V MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B MSZ-LN50VG2B MSZ-LN60VG2B MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R MSZ-LN50VG2R MSZ-LN60VG2R 10-1. - Page 28 10-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-4.) disappears, the memorized failure details can be recalled. 1.
- Page 29 2. Flow chart of AIR PURIFYING power failure mode and i-see SENSOR failure mode recall function Operational procedure The air purifying device or i-see SENSOR might be abnormal. Check if the air purifying device or i-see SENSOR is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function.
- Page 30 4. Table of indoor unit failure mode recall function (When recalled at a set temperature of 24°C) Abnormal point POWER lamp Condition Remedy (Failure mode) Not lit Normal — — The room temperature thermistor short or 1-time blink every Room temperature Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second...
- Page 31 10-3. INSTRUCTION OF TROUBLESHOOTING 1. Check of the unit. *1. "Test Run operation" means the operation If blinking of OPERATION NOTE: The indoor unit does not Start INDICATOR lamp cannot be operate by smartphone, within 30 minutes after EMERGENCY checked, it can be checked with refer to 10-3.2."Check of OPERATION switch is pressed.
- Page 32 2. Check of Wi-Fi interface Follow the procedure below if the air conditioner cannot be monitored or controlled with a device such as a smartphone. Start There is a problem in communication between the air conditioner and Is the UNIT lamp on the Wi-Fi interface blinking? the Wi-Fi interface.
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Page 33: Operation Indicator
10-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp blinks. •... -
Page 34: Trouble Criterion Of Main Parts
OPERATION INDICATOR Blinking Not lit (POWER) (AIR PURIFYING) Abnormal Operation indicator lamp Symptom Condition Remedy point • AIR PURIFYING lamp blink. The operation mode of the each indoor unit is MXZ type Outdoor unit differently set to COOL (includes DRY, FAN) •... -
Page 35: Troubleshooting Flow
10-6. TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector CN211. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch. - Page 36 B Check of remote controller and indoor electronic control P.C. board NOTE: Check if the remote controller is exclusive for this air conditioner. Press STOP/OPERATE (OFF/ON) button on the remote controller. 1 Look at the image of the signal transmitting section of the remote controller through the monitor of a digital camera or a camera phone.
- Page 37 C Check of indoor P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 from indoor power P.C. board and vane Measure the resistance of indoor fan Short circuit: motor connector CN151 from the indoor motor.
- Page 38 D How to check miswiring and serial signal error MUZ Type Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)? The connection information to the Multi series is stored...
- Page 39 MXZ Type Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. LED indication for communication status Communication status is indicated by the Turn ON the power supply. LED. Unit status Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring.
- Page 40 E Check of AIR PURIFYING power After performing the check, make sure to release the failure mode recall function. High voltage (approximately 5.8kV) is generated during AIR PURIFYING power operation. Turn ON the power supply. Pay careful attention and never touch the air purifying device and the high-voltage lead part.
- Page 41 F Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 3 m, or is the the indoor unit, and/or the antennas and the distance between the antennas and the outdoor unit.
- Page 42 10-7. TEST POINT DIAGRAM AND VOLTAGE Indoor power P.C. board, Indoor electronic control P.C. board, Display and receiver P.C. board, Switch buzzer P.C. board MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV MSZ-LN50VGV MSZ-LN60VGV MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB MSZ-LN50VGB MSZ-LN60VGB MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR MSZ-LN50VGR...
- Page 43 DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are 2 types (Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
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Page 44: Operating Procedure
OPERATING PROCEDURE PHOTOS/FIGURES How to install the front panel (Photos 1, 2, 3) Figure 2 (1) Attach the right and left arm holders (Photo 2). (2) Install the front panel to the indoor unit. (3) Attach the safety string to the center of the panel (F). - Page 45 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the Wi-Fi interface (Photos 4, 8) Photo 4 Wi-Fi (1) Remove the front panel and the panels (U) (R) (L). interface Lead wires of (2) Remove the Wi-Fi interface on the right side of the the air purifing panel (F).
- Page 46 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the indoor electrical box Photo 5 (Photos 4, 5, 6, 7, 8) (1) Remove the front panel, the outer vanes (R) (L) (hori- zontal), and the panels (U) (R) (L) (F) (refer to section 1). (2) Remove the lead wires of indoor coil thermistor, lead wires of air purifying device, and cable of Wi-Fi inter- face from the water cover (Photo 4).
- Page 47 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the indoor electronic control P.C. Photo 8 (Enlarged view of the indoor board, the indoor power P.C. board, the indoor electronic control P.C.bard) terminal block, and the room temperature ther- mistor CN201 TAB3 CN211 CN202 (1) Remove the electrical box (refer to section 3).
- Page 48 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the DISPLAY AND i-see SENSOR ASSEMBLY, the switch buzzer P.C. board, the display and receiver P.C. board, and the inter- lock switch (Photo 9) (1) Disengage the 4 catches of the display cover, and remove the display cover (Photo 9-1). (2) Remove the lead wires of the DISPLAY AND i-see SENSOR ASSEMBLY from the hooks (Photo 9-2).
- Page 49 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the outer vane motors Photo 10 (horizontal) (Photos 8, 10, 11, 12, 13) (1) Remove the front panel, the outer vanes (R) (L)(hori- zontal), the panels (U) (R) (L) (F), the corner boxes (R) (L), Wi-Fi interface, DISPLAY and i-see SENSOR ASSEMBLY, V.A.
- Page 50 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the vane motor units (L) (R) (vertical) Photo 14 and the vane motors (horizontal) Screws of the vane motor (1) Remove the front panel, the outer vanes (R) (L) (horizontal) on back side (horizontal), the inner vanes (R) (L), the vane slide Vane motor unit (R) assembly, the panels (U) (R) (L) (F), the corner boxes Vane motor (R)
- Page 51 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the air purifying device Photo 19 (Photo 8, 18) Heat exchanger (1) Remove the front panel, the outer vanes (R) (L)(hori- zontal), the panels (U) (R) (L) (F), the corner box (R), Fan motor V.A. clamp and the electrical cover. (2) Remove the lead wires from the water cover.
- Page 52 Do not pull the lead wire when removing the indoor coil thermistor. HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2016 MITSUBISHI ELECTRIC CORPORATION Issued: Dec. 2019. No. OBH766 REVISED EDITION-C Issued: Mar. 2018. No. OBH766 REVISED EDITION-B Issued: Sep.