Mitsubishi Electric MSZ-LN18VGW-E1 User manual

Models
MSZ-LN18VGW -E1 MSZ-LN50VGW -E1 , ER1
MSZ-LN18VGV -E1 MSZ-LN50VGV -E1 , ER1
MSZ-LN18VGB -E1 MSZ-LN50VGB -E1 , ER1
MSZ-LN18VGR -E1 MSZ-LN50VGR -E1 , ER1
MSZ-LN25VGW -E1 , ER1 MSZ-LN60VGW -E1 , ER1
MSZ-LN25VGV -E1 , ER1 MSZ-LN60VGV -E1 , ER1
MSZ-LN25VGB -E1 , ER1 MSZ-LN60VGB -E1 , ER1
MSZ-LN25VGR -E1 , ER1 MSZ-LN60VGR -E1 , ER1
MSZ-LN35VGW -E1 , ER1
MSZ-LN35VGV -E1 , ER1
MSZ-LN35VGB -E1 , ER1
MSZ-LN35VGR -E1 , ER1
INDOOR UNIT
SERVICE MANUAL No. OBH766
REVISED EDITION-B
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. NOISE CRITERIA CURVE ································ 5
5. OUTLINES AND DIMENSIONS ························ 7
6. WIRING DIAGRAM············································ 8
7. REFRIGERANT SYSTEM DIAGRAM··············· 9
8. SERVICE FUNCTIONS ··································· 10
9. MICROPROCESSOR CONTROL ··················· 12
10. TROUBLESHOOTING····································· 22
11. DISASSEMBLY INSTRUCTIONS···················· 39
PARTS CATALOG (OBB766)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Outdoor unit service manual
MUZ-LN•VG Series (OBH767)
MUZ-LN•VGHZ Series (OBH768)
OBH766 REVISED EDITION-A is void.
Revision B:
• MSZ-LN18VGW/V/B/R- E1 have been
added.

2
MSZ-LN25VGW - E1 , ER1
MSZ-LN25VGV - E1 , ER1
MSZ-LN25VGB - E1 , ER1
MSZ-LN25VGR - E1 , ER1
MSZ-LN35VGW - E1 , ER1
MSZ-LN35VGV - E1 , ER1
MSZ-LN35VGB - E1 , ER1
MSZ-LN35VGR - E1 , ER1
1. New model
(Wi-Fi interface has been set as a standard part.)
MSZ-LN18VGW - E1
MSZ-LN18VGV - E1
MSZ-LN18VGB - E1
MSZ-LN18VGR - E1
1. New model
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.
TECHNICAL CHANGES
1
These models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-LN·VG-series outdoor units enables the low standby power control. Refer to the techni-
cal guide about the low standby power control.
These models may be connected to the MUZ-LN·VG series after once connected to the MXZ series and operated, for exam-
ple because of relocation. In that case, the MUZ-LN·VG series outdoor units will not operate without taking a step. Follow the
procedure "Deleting the memorized abnormal condition" described in 10-2.1.
Revision A:
• For Wi-Fi interface, 10. TROUBLE SHOOTING has been modified.
Revision B:
• MSZ-LN18VGW/V/B/R- E1 have been added.
MSZ-LN50VGW - E1 , ER1
MSZ-LN50VGV - E1 , ER1
MSZ-LN50VGB - E1 , ER1
MSZ-LN50VGR - E1 , ER1
MSZ-LN60VGW - E1 , ER1
MSZ-LN60VGV - E1 , ER1
MSZ-LN60VGB - E1 , ER1
MSZ-LN60VGR - E1 , ER1
OBH766B

3
ACCESSORIES
PART NAMES AND FUNCTIONS
2
Operation indicator lamp
Remote control
receiving section
Emergency operation
switch
Horizontal
vane
Air inlet
Air ¿OWHU
Air cleaning filter
(Deodorizing filter, black)
(Silverionized air purifier
filter, blue, option)
Front panel
Air outlet
Air purifying
device
i-see sensor
(Air purifying)
(Power)
Spec name plate
Wi-Fi interface
Remote controller
Model
MSZ-LN18VGW
MSZ-LN18VGV
MSZ-LN18VGB
MSZ-LN18VGR
MSZ-LN25VGW
MSZ-LN25VGV
MSZ-LN25VGB
MSZ-LN25VGR
MSZ-LN35VGW
MSZ-LN35VGV
MSZ-LN35VGB
MSZ-LN35VGR
MSZ-LN50VGW
MSZ-LN50VGV
MSZ-LN50VGB
MSZ-LN50VGR
MSZ-LN60VGW
MSZ-LN60VGV
MSZ-LN60VGB
MSZ-LN60VGR
Installation plate 1
Installation plate fixing screw
4 × 25 mm 5
Wireless remote controller 1
Felt tape
(For left or left-rear piping) 1
Corner box R 4
Corner box L 4
Battery (AAA) for remote controller 2
Air cleaning filter
(Deodorizing filter, black) 1
Air purifying device 1
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
OBH766B

4
Indoor model
MSZ-LN18VGW
MSZ-LN18VGV
MSZ-LN18VGB
MSZ-LN18VGR
MSZ-LN25VGW
MSZ-LN25VGV
MSZ-LN25VGB
MSZ-LN25VGR
MSZ-LN35VGW
MSZ-LN35VGV
MSZ-LN35VGB
MSZ-LN35VGR
MSZ-LN50VGW
MSZ-LN50VGV
MSZ-LN50VGB
MSZ-LN50VGR
MSZ-LN60VGW
MSZ-LN60VGV
MSZ-LN60VGB
MSZ-LN60VGR
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input 1 Cooling W20 24 29 40
Heating 29 34 40
Running current
1Cooling A0.21 0.23 0.28 0.37
Heating 0.28 0.33 0.37
Fan motor
Model RC0J30-ME
Current 1Cooling A0.21 0.23 0.28 0.37
Heating 0.28 0.28 0.33 0.37
Dimensions W × H × D mm 890 × 307 × 233
Weight kg 15.5
Special remarks
Air direction 5
Airflow
Cooling
Super High
m3/h
714 768 834 942
High 528 528 636 762
Med. 426 426 528 636
Low 348 348 450 528
Silent 258 258 342 426
Heating
Super High
m3/h
864 822 942 942
High 510 510 642 816
Med. 426 426 510 690
Low 342 342 384 564
Silent 240 258 324 390
Sound level
Cooling
Super High
dB(A)
42 43 46 49
High 36 36 39 45
Med. 29 29 35 41
Low 23 24 31 37
Silent 19 19 27 29
Heating
Super High
dB(A)
45 45 47 49
High 36 36 39 45
Med. 29 29 34 41
Low 24 24 29 37
Silent 19 19 25 29
Fan speed
Cooling
Super High
rpm
1,030 1,090 1,160 1,280
High 820 820 940 1,080
Med. 700 700 820 940
Low 610 610 730 820
Silent 500 500 600 700
Heating
Super High
rpm
1,190 1,150 1,280 1,280
High 800 800 950 1,140
Med. 700 700 800 1,000
Low 600 600 650 860
Silent 480 500 580 660
Fan speed regulator 5
Remote controller model W: SG16L V: XG16A B: XG16C R: XG16B
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C
Heating: Indoor Dry-bulb temperature 20°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
1 Measured under rated operating frequency.
SPECIFICATION
3
Specifications and rating conditions of main electric parts
Fuse (F11) T3.15AL250 V
Horizontal vane motor (MV1) 12 V DC
Vertical vane motor (MV2) 12 V DC
i-see SENSOR MOTOR (MT) 12 V DC
Varistor (NR11) 470 V
Terminal block (TB) 3P
OBH766B

5
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
45
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
45
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
46
47
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
NOISE CRITERIA CURVE
4
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
43
45
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
MSZ-LN18VGW MSZ-LN18VGB
MSZ-LN18VGV MSZ-LN18VGR MSZ-LN25VGW MSZ-LN25VGB MSZ-LN25VGV MSZ-LN25VGR
MSZ-LN35VGW MSZ-LN35VGB
MSZ-LN35VGV MSZ-LN35VGR MSZ-LN50VGW MSZ-LN50VGB MSZ-LN50VGV MSZ-LN50VGR
OBH766B

6
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
49
49
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
MSZ-LN60VGW MSZ-LN60VGB
MSZ-LN60VGV MSZ-LN60VGR
Test conditions
Cooling: Dry-bulb temperature 27 °C
Wet-bulb temperature 19 °C
Heating: Dry-bulb temperature 20 °C
INDOOR UNIT WALL
MICROPHONE
0.8m
1m
OBH766B

7
Unit: mm
890
505
70
38.5
5669
43
43
1240
176212
225 22581 81
85360
48 217.5
57
259
385
60
217.5
259
7
38.5
127
74.5
21.5
57 150 683
28.523.5 95
118
100
180.5
33.5
303
874
81
237.5
7.5 48
307
5
233
MSZ-LN18/25/35/50VGW
PIPING
INSULATION ø35 O.D
LIQUID LINE
ø 6.35 - 0.5m
(FLARED CONNECTION
ø 6.35)
GAS LINE
ø 9.52 - 0.45m
(FLARED CONNECTION
ø 9.52)
DRAIN HOSE INSULATION
ø 28
CONNECTED PART
ø 16 O.D
REMOTE CONTROLLER
T01
AIR OUT
AIR IN INSTALLATION PLATE
DRAIN HOSE
INSTALLATION PLATE 11×20 OBLONG HOLE
11×26 OBLONG HOLE
INDOOR UNIT
PIPING
WALL HOLE ø65
MSZ-LN60VGW
PIPING
INSULATION ø 37 O.D
LIQUID LINE
ø 6.35 - 0.5m
(FLARED CONNECTION
ø 6.35)
GAS LINE
ø 9.52 - 0.45m
(FLARED CONNECTION
ø 12.7)
DRAIN HOSE INSULATION
ø 28
CONNECTED PART
ø 16 O.D
T01
MSZ-LN18/25/35/50VGV,VGB,VGR
MSZ-LN60VGV,VGB,VGR
PIPING
INSULATION
ø 35 O.D
LIQUID LINE
ø 6.35 - 0.5m
(FLARED CONNECTION
ø 6.35)
GAS LINE
ø 9.52 - 0.45m
(FLARED CONNECTION
ø 9.52)
DRAIN HOSE INSULATION
ø 28
CONNECTED PART
ø 16 O.D
T02
PIPING
INSULATION ø 37 O.D
LIQUID LINE
ø 6.35 - 0.5m
(FLARED CONNECTION
ø 6.35)
GAS LINE
ø 9.52 - 0.45m
(FLARED CONNECTION ø12.7)
DRAIN HOSE INSULATION
ø 28
CONNECTED PART
ø 16 O.D
T02
193
60 19
193
60 21.4
IN CASE OF T01
IN CASE OF T02
REMOTE CONTROLLER
REMOTE CONTROLLER
REMOTE CONTROLLERREMOTE CONTROLLER
OUTLINES AND DIMENSIONS
5
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
OBH766B

8
WIRING DIAGRAM
6
MSZ-LN50VGW
MSZ-LN50VGV
MSZ-LN50VGB
MSZ-LN50VGR
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
OBH766B

9
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
Unit: mm
REFRIGERANT SYSTEM DIAGRAM
7
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø9.52 (LN50)
ø12.7 (LN60)
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW
MSZ-LN18VGV MSZ-LN25VGV MSZ-LN35VGV
MSZ-LN18VGB MSZ-LN25VGB MSZ-LN35VGB
MSZ-LN18VGR MSZ-LN25VGR MSZ-LN35VGR
MSZ-LN50VGW MSZ-LN60VGW
MSZ-LN50VGV MSZ-LN60VGV
MSZ-LN50VGB MSZ-LN60VGB
MSZ-LN50VGR MSZ-LN60VGR
OBH766B

10
8-1. TIMER SHORT MODE
For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C.
board.
(Refer to 10-7.)
• The set time for the ON/OFF timer can be reduced to 1 second for each minute.
• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to 1
minute. Restarting the compressor, which takes 3 minutes, cannot be reduced.
8-2. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
To operate the indoor units individually with each remote controller, assign a number to each remote controller according
to the number of the indoor unit.
This setting can be set only when all the following conditions are met:
• The remote controller is powered OFF.
• Weekly timer is not set.
• Weekly timer is not being edited.
(1) Hold down button on the remote controller for 2 seconds to enter the pairing mode.
(2) Press button again and assign a number to each remote controller.
Each press of button advances the number in the following order: 1 →2 →3 →4.
(3) Press button to complete the pairing setting.
After you turn the breaker ON, the remote controller that first sends a signal to an indoor unit will be regarded as the
remote controller for the indoor unit.
Once they are set, the indoor unit will only receive the signal from the assigned remote controller afterwards.
SERVICE FUNCTIONS
8
8-3. SETTING THE INSTALLATION POSITION
Be sure to set the remote controller according to the installed position of the indoor unit.
Installation position:
Left: Distance to objects (wall, cabinet, etc.) is less than 50 cm to the left
Center: Distance to objects (wall, cabinet, etc.) is more than 50 cm to the left and right
Right: Distance to objects (wall, cabinet, etc.) is less than 50 cm to the right
The installation position can be set only when all the following conditions are met:
• The remote controller is powered OFF.
• Weekly timer is not set.
• Weekly timer is not being edited.
(1) Hold down button on the remote controller for 2 seconds to enter the position setting mode.
(2) Select the target installation position by pressing button. (Each press of the button displays the
positions in order: center →right →left.)
(3) Press button to complete the position setting.
Installation position Left Center Right
Remote controller
display
(Left)(Center)(Right)
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
OBH766B