Mitsubishi Electric MSZ-LN18VG2W-E1 User manual

INDOOR UNIT
SERVICE MANUAL No. OBH766
REVISED EDITION-C
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)
Outdoor unit service manual
MUZ-LN•VG Series (OBH767)
MUZ-LN•VGHZ Series (OBH768)
MSZ-LN25VGW/V/B/R
MSZ-LN35VGW/V/B/R
MSZ-LN50VGW/V/B/R
MSZ-LN60VGW/V/B/R
OBH766 REVISED EDITION-B is void.
Revision C:
• MSZ-LN18VG2W/V/B/R- E1 ,EN1 ,ET1 ,
MSZ-LN25VG2W/V/B/R- E1 ,EN1 ,ET1 ,
MSZ-LN35VG2W/V/B/R- E1 ,EN1 ,ET1 ,
MSZ-LN50VG2W/V/B/R- E1 ,EN1 ,ET1
and MSZ-LN60VG2W/V/B/R- E1 ,ET1
have been added.
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-LN18VG2W -E1 , EN1 , ET1 MSZ-LN50VG2W -E1 , EN1 , ET1
MSZ-LN18VG2V -E1 , EN1 , ET1 MSZ-LN50VG2V -E1 , EN1 , ET1
MSZ-LN18VG2B -E1 , EN1 , ET1 MSZ-LN50VG2B -E1 , EN1 , ET1
MSZ-LN18VG2R -E1 , EN1 , ET1 MSZ-LN50VG2R -E1 , EN1 , ET1
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-LN25VG2W -E1 , EN1 , ET1 MSZ-LN60VG2W -E1 , ET1
MSZ-LN25VG2V -E1 , EN1 , ET1 MSZ-LN60VG2V -E1 , ET1
MSZ-LN25VG2B -E1 , EN1 , ET1 MSZ-LN60VG2B -E1 , ET1
MSZ-LN25VG2R -E1 , EN1 , ET1 MSZ-LN60VG2R -E1 , ET1
MSZ-LN35VGW -E1 , ER1
MSZ-LN35VGV -E1 , ER1
MSZ-LN35VGB -E1 , ER1
MSZ-LN35VGR -E1 , ER1
MSZ-LN35VG2W -E1 , EN1 , ET1
MSZ-LN35VG2V -E1 , EN1 , ET1
MSZ-LN35VG2B -E1 , EN1 , ET1
MSZ-LN35VG2R -E1 , EN1 , ET1

2
MSZ-LN25VGW - E1 , ER1 MSZ-LN50VGW - E1 , ER1
MSZ-LN25VGV - E1 , ER1 MSZ-LN50VGV - E1 , ER1
MSZ-LN25VGB - E1 , ER1 MSZ-LN50VGB - E1 , ER1
MSZ-LN25VGR - E1 , ER1 MSZ-LN50VGR - E1 , ER1
MSZ-LN35VGW - E1 , ER1 MSZ-LN60VGW - E1 , ER1
MSZ-LN35VGV - E1 , ER1 MSZ-LN60VGV - E1 , ER1
MSZ-LN35VGB - E1 , ER1 MSZ-LN60VGB - E1 , ER1
MSZ-LN35VGR - E1 , ER1 MSZ-LN60VGR - E1 , ER1
1. New model
(Wi-Fi interface has been set as a standard part.)
MSZ-LN18VGW - E1 MSZ-LN25VG2W - EN1 , ET1 MSZ-LN50VG2W - EN1 , ET1
MSZ-LN18VGV - E1 MSZ-LN25VG2V - EN1 , ET1 MSZ-LN50VG2V - EN1 , ET1
MSZ-LN18VGB - E1 MSZ-LN25VG2B - EN1 , ET1 MSZ-LN50VG2B - EN1 , ET1
MSZ-LN18VGR - E1 MSZ-LN25VG2R - EN1 , ET1 MSZ-LN50VG2R - EN1 , ET1
MSZ-LN18VG2W - EN1 , ET1 MSZ-LN35VG2W - EN1 , ET1 MSZ-LN60VG2W - ET1
MSZ-LN18VG2V - EN1 , ET1 MSZ-LN35VG2V - EN1 , ET1 MSZ-LN60VG2V - ET1
MSZ-LN18VG2B - EN1 , ET1 MSZ-LN35VG2B - EN1 , ET1 MSZ-LN60VG2B - ET1
MSZ-LN18VG2R - EN1 , ET1 MSZ-LN35VG2R - EN1 , ET1 MSZ-LN60VG2R - ET1
1. New model
MSZ-LN18VGW - E1 MSZ-LN18VG2W - E1
MSZ-LN18VGV - E1 MSZ-LN18VG2V - E1
MSZ-LN18VGB - E1 MSZ-LN18VG2B - E1
MSZ-LN18VGR - E1 MSZ-LN18VG2R - E1
MSZ-LN25VGW - E1 MSZ-LN25VG2W - E1
MSZ-LN25VGV - E1 MSZ-LN25VG2V - E1
MSZ-LN25VGB - E1 MSZ-LN25VG2B - E1
MSZ-LN25VGR - E1 MSZ-LN25VG2R - E1
MSZ-LN35VGW - E1 MSZ-LN35VG2W - E1
MSZ-LN35VGV - E1 MSZ-LN35VG2V - E1
MSZ-LN35VGB - E1 MSZ-LN35VG2B - E1
MSZ-LN35VGR - E1 MSZ-LN35VG2R - E1
1. Heat exchanger has been changed.
2. Refrigerant amount has been changed.
3. Remote controller has been changed.
MSZ-LN50VGW - E1 MSZ-LN50VG2W - E1
MSZ-LN50VGV - E1 MSZ-LN50VG2V - E1
MSZ-LN50VGB - E1 MSZ-LN50VG2B - E1
MSZ-LN50VGR - E1 MSZ-LN50VG2R - E1
MSZ-LN60VGW - E1 MSZ-LN60VG2W - E1
MSZ-LN60VGV - E1 MSZ-LN60VG2V - E1
MSZ-LN60VGB - E1 MSZ-LN60VG2B - E1
MSZ-LN60VGR - E1 MSZ-LN60VG2R - E1
Use the specied 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.
Revision C:
• MSZ-LN18VG2W/V/B/R- E1 ,EN1 ,ET1 , MSZ-LN25VG2W/V/B/R- E1 ,EN1 ,ET1 , MSZ-LN35VG2W/V/B/R- E1 ,EN1 ,ET1 ,
MSZ-LN50VG2W/V/B/R- E1 ,EN1 ,ET1 and MSZ-LN60VG2W/V/B/R- E1 ,ET1 have been added.
OBH766C

3
ACCESSORIES
PART NAMES AND FUNCTIONS
2
Operation indicator lamp
Remote control
receiving section
Emergency operation
switch
Horizontal
vane
Air inlet
Air filter
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
All models
Installation plate 1
Installation plate xing 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 lter
(Deodorizing lter, 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
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
OBH766C

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
*1
Cooling A0.21 0.23 0.28 0.37
Heating 0.28 0.33 0.37
Fan motor
Model RC0J30-ME
Current *1 Cooling A0.21 0.23 0.28 0.37
Heating 0.28 0.33 0.37
Dimensions W × H × D mm 890 × 307 × 233
Weight kg 15.5
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
714 768 834 942
High 528 636 762
Med. 426 528 636
Low 348 450 528
Silent 258 342 426
Heating
Super High
m3/h
864 822 942 942
High 510 642 816
Med. 426 510 690
Low 342 384 564
Silent 240 258 324 390
Sound level
Cooling
Super High
dB(A)
42 43 46 49
High 36 39 45
Med. 29 35 41
Low 23 24 31 37
Silent 19 27 29
Heating
Super High
dB(A)
45 47 49
High 36 39 45
Med. 29 34 41
Low 24 29 37
Silent 19 25 29
Fan speed
Cooling
Super High
rpm
1,030 1,090 1,160 1,280
High 820 940 1,080
Med. 700 820 940
Low 610 730 820
Silent 500 600 700
Heating
Super High
rpm
1,190 1,150 1,280 1,280
High 800 950 1,140
Med. 700 800 1,000
Low 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
OBH766C

5
Indoor model
MSZ-LN18VG2W
MSZ-LN18VG2V
MSZ-LN18VG2B
MSZ-LN18VG2R
MSZ-LN25VG2W
MSZ-LN25VG2V
MSZ-LN25VG2B
MSZ-LN25VG2R
MSZ-LN35VG2W
MSZ-LN35VG2V
MSZ-LN35VG2B
MSZ-LN35VG2R
MSZ-LN50VG2W
MSZ-LN50VG2V
MSZ-LN50VG2B
MSZ-LN50VG2R
MSZ-LN60VG2W
MSZ-LN60VG2V
MSZ-LN60VG2B
MSZ-LN60VG2R
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input *1 Cooling W20 23 29 40
Heating 27 34 40
Running current
*1
Cooling A0.21 0.23 0.28 0.37
Heating 0.26 0.33 0.37
Fan motor
Model RC0J40-SB RC0J30-ME
Current *1 Cooling A0.21 0.23 0.28 0.37
Heating 0.26 0.33 0.37
Dimensions W × H × D mm 890 × 307 × 233
Weight kg W: 14.5
V, B, R: 15.5
W: 15
V, B, R: 16
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
744 780 834 942
High 552 636 762
Med. 426 528 636
Low 354 450 528
Silent 282 342 426
Heating
Super High
m3/h
834 942 942
High 660 642 816
Med. 450 510 690
Low 396 384 564
Silent 270 324 390
Sound level
Cooling
Super High
dB(A)
42 43 46 49
High 36 39 45
Med. 29 35 41
Low 23 24 31 37
Silent 19 27 29
Heating
Super High
dB(A)
45 47 49
High 38 39 45
Med. 29 34 41
Low 24 29 37
Silent 19 25 29
Fan speed
Cooling
Super High
rpm
1,040 1,080 1,160 1,280
High 820 940 1,080
Med. 670 820 940
Low 580 730 820
Silent 500 600 700
Heating
Super High
rpm
1,140 1,280 1,280
High 940 950 1,140
Med. 700 800 1,000
Low 630 650 860
Silent 480 580 660
Fan speed regulator 5
Indoor model
MSZ-LN18/25/35/50/60VG2
W V B R
Remote controller model -E, ET SG19N XG19D XG19F XG19E
-EN SG19L XG19A XG19C XG19B
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
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.
OBH766C

6
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
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
NOISE CRITERIA CURVE
4
MSZ-LN18VGW MSZ-LN18VGB
MSZ-LN18VGV MSZ-LN18VGR
MSZ-LN25VGW MSZ-LN25VGB
MSZ-LN25VGV MSZ-LN25VGR
MSZ-LN18VG2W MSZ-LN18VG2B
MSZ-LN18VG2V MSZ-LN18VG2R
MSZ-LN25VG2W MSZ-LN25VG2B
MSZ-LN25VG2V MSZ-LN25VG2R
OBH766C

7
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
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
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-LN35VGW MSZ-LN35VGB
MSZ-LN35VGV MSZ-LN35VGR
MSZ-LN50VGW MSZ-LN50VGB
MSZ-LN50VGV MSZ-LN50VGR
MSZ-LN50VG2W MSZ-LN50VG2B
MSZ-LN50VG2V MSZ-LN50VG2R
MSZ-LN35VG2W MSZ-LN35VG2B
MSZ-LN35VG2V MSZ-LN35VG2R
OBH766C

8
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
MSZ-LN60VG2W MSZ-LN60VG2B
MSZ-LN60VG2V MSZ-LN60VG2R
OBH766C

9
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
AIR OUT
AIR IN INSTALLATION PLATE
DRAIN HOSE
INSTALLATION PLATE 11×20 OBLONG HOLE
11×26 OBLONG HOLE
INDOOR UNIT
PIPING
WALL HOLE ø65
193
60 19
193
60 21.4
<IN CASE OF T01>
<IN CASE OF T02>
REMOTE CONTROLLER
MSZ-LN18/25/35/50/60VGW
MSZ-LN18/25/35/50VG2W
MSZ-LN18/25/35/50/60VGV,VGB,VGR
MSZ-LN18/25/35/50VG2V,VG2R,VG2B
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
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
MSZ-LN18/25/35VGW,VGV,VGB,VGR MSZ-LN60VGW,VGV,VGB,VGR
PIPING
INSULATION ø35 O.D
LIQUID LINE
ø6.35 - 0.5m
(FLARED CONNECTION ø6.35)
GAS LINE
ø9.52 - 0.45m
(FLARED CONNECTION ø9.52)
DRAIN HOSE
INSULATION ø28
CONNECTED PART ø16 O.D
PIPING
INSULATION ø37 O.D
LIQUID LINE
ø6.35 - 0.5m
(FLARED CONNECTION ø6.35)
GAS LINE
ø9.52 - 0.45m
(FLARED CONNECTION ø12.7)
DRAIN HOSE
INSULATION ø28
CONNECTED PART ø16 O.D
MSZ-LN50VGW,VGV,VGB,VGR,
MSZ-LN18/25/35/50VG2W,VG2V,VG2R,VG2B
-E1, ET1
MSZ-LN18/25/35/50VG2W,VG2V,VG2R,VG2B
-EN1
PIPING
INSULATION ø37 O.D
LIQUID LINE
ø6.35 - 0.5m
(FLARED CONNECTION ø6.35)
GAS LINE
ø9.52 - 0.45m
(FLARED CONNECTION ø9.52)
DRAIN HOSE
INSULATION ø28
CONNECTED PART ø16 O.D
PIPING
INSULATION ø37 O.D
LIQUID LINE
ø6.35 - 0.64m
(FLARED CONNECTION ø6.35)
GAS LINE
ø9.52 - 0.59m
(FLARED CONNECTION ø9.52)
DRAIN HOSE
INSULATION ø28
CONNECTED PART ø16 O.D
OBH766C

10
WIRING DIAGRAM
6
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-
E1
,
EN1
MSZ-LN25VG2W-
E1
,
EN1
MSZ-LN35VG2W-
E1
,
EN1
MSZ-LN60VG2W-
E1
MSZ-LN18VG2V-
E1
,
EN1
MSZ-LN25VG2V-
E1
,
EN1
MSZ-LN35VG2V-
E1
,
EN1
MSZ-LN60VG2V-
E1
MSZ-LN18VG2B-
E1
,
EN1
MSZ-LN25VG2B-
E1
,
EN1
MSZ-LN35VG2B-
E1
,
EN1
MSZ-LN60VG2B-
E1
MSZ-LN18VG2R-
E1
,
EN1
MSZ-LN25VG2R-
E1
,
EN1
MSZ-LN35VG2R-
E1
,
EN1
MSZ-LN60VG2R-
E1
OBH766C

11
Konektör
Terminal bloğu
i-see
SENSÖR
SİVİÇ/
BUZZER
KARTI
HAVA
TEMİZLEME
CİHAZI
KANAT MOTORU
(DİKEY)
i-see SENSÖR
MOTORU
RESİSTÖR
PARÇA ADI
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ
(ANA)
BORU SICAKLIK
TERMİSTÖRÜ
(YARDIMCI)
TERMİNAL BLOĞU
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE
ELEKTRONİK
KONTROL
KARTI
KİLİTLEME
ANAHTARI
(HAVA TEMİZLEME
CİHAZI)
RÖLE
DIŞ ÜNİTEYE
Wİ-Fİ ARAYÜZÜ
EKRAN
KAYDEDİCİ
DEVRE KARTI
NOTLAR :
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme kablosu kullanın
3. Sembolleri gösterir
KANAT MOTORU
(YATAY)
MSZ-LN18VG2W-
ET1
MSZ-LN25VG2W-
ET1
MSZ-LN35VG2W-
ET1
MSZ-LN60VG2W-
ET1
MSZ-LN18VG2V-
ET1
MSZ-LN25VG2V-
ET1
MSZ-LN35VG2V-
ET1
MSZ-LN60VG2V-
ET1
MSZ-LN18VG2B-
ET1
MSZ-LN25VG2B-
ET1
MSZ-LN35VG2B-
ET1
MSZ-LN60VG2B-
ET1
MSZ-LN18VG2R-
ET1
MSZ-LN25VG2R-
ET1
MSZ-LN35VG2R-
ET1
MSZ-LN60VG2R-
ET1
MSZ-LN50VGW
MSZ-LN50VGV
MSZ-LN50VGB
MSZ-LN50VGR
OBH766C

12
MSZ-LN50VG2W -
E1
,
EN1
MSZ-LN50VG2V -
E1
,
EN1
MSZ-LN50VG2B -
E1
,
EN1
MSZ-LN50VG2R -
E1
,
EN1
MSZ-LN50VG2W -
ET1
MSZ-LN50VG2V -
ET1
MSZ-LN50VG2B -
ET1
MSZ-LN50VG2R -
ET1
Konektör
Terminal bloğu
i-see
SENSÖR
SİVİÇ/
BUZZER
KARTI
HAVA
TEMİZLEME
CİHAZI
KANAT MOTORU
(DİKEY)
i-see SENSÖR
MOTORU
REAKTÖR
PARÇA ADI
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ
(ANA)
BORU SICAKLIK
TERMİSTÖRÜ
(YARDIMCI)
TERMİNAL BLOĞU
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE
ELEKTRONİK
KONTROL
KARTI
KİLİTLEME
ANAHTARI
(HAVA TEMİZLEME
CİHAZI)
RÖLE
DIŞ ÜNİTEYE
Wİ-Fİ ARAYÜZÜ
EKRAN
KAYDEDİCİ
DEVRE KARTI
NOTLAR:
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme kablosu kullanın
3. Sembolleri gösterir
KANAT MOTORU
(YATAY)
OBH766C

13
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-LN18VG2W MSZ-LN25VG2W MSZ-LN35VG2W
MSZ-LN18VG2V MSZ-LN25VG2V MSZ-LN35VG2V
MSZ-LN18VG2B MSZ-LN25VG2B MSZ-LN35VG2B
MSZ-LN18VG2R MSZ-LN25VG2R MSZ-LN35VG2R
MSZ-LN50VGW MSZ-LN60VGW
MSZ-LN50VGV MSZ-LN60VGV
MSZ-LN50VGB MSZ-LN60VGB
MSZ-LN50VGR MSZ-LN60VGR
MSZ-LN50VG2W MSZ-LN60VG2W
MSZ-LN50VG2V MSZ-LN60VG2V
MSZ-LN50VG2B MSZ-LN60VG2B
MSZ-LN50VG2R MSZ-LN60VG2R
OBH766C

14
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
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
OBH766C

15
8-4. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed
are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation
in the same mode just before the shutoff of the main power.
Operation
If the main power has been cut, the operation settings remain.
After the power is restored, the unit restarts automatically according to the memory.
(However, it takes at least 3 minutes for the compressor to start running.)
How to disable “AUTO RESTART FUNCTION”
Turn off the main power for the unit.
Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 10-7.)
NOTE:
• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-
celled.
• If the unit has been turned OFF with the remote controller before power failure, the auto restart function does not work as
the power button of the remote controller is OFF.
• To prevent the breaker from tripping OFF due to the rush of starting current, systematize other home appliance not to
turn ON at the same time.
• When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding to the system that allows the units to start one by one.
JR77
CN1J1CN151
INDOOR electronic control
P.C. board
CN102
Wi-Fi interface Wi-Fi interface
RESET
ERR
NET
MODE
UNIT
MODE
3
4
5
6
21
•Ensure that the Router supports the WPA2-AES encryption setting before
starting the Wi-Fi interface setup.
•The End user should read and accept the terms and conditions of the Wi-Fi
service before using this Wi-Fi interface.
•To complete connection of this Wi-Fi interface to the Wi-Fi service, the Rout-
er may be required.
•This Wi-Fi interface will not commence transmission of any operational data
from the system until the End user registers and accepts the terms and con-
ditions of the Wi-Fi service.
•This Wi-Fi interface should not be installed and connected to any Mitsubishi
Electric system which is to provide application critical cooling or heating.
•At the time of relocation or disposal, reset the Wi-Fi interface to the factory
default.
This Wi-Fi interface communicates the status information and controls
the commands from the MELCloud by connecting to an indoor unit.
(1) MODE switch
• The MODE switch is used for selecting modes in configurations.
(2) RESET switch
• Hold down the RESET switch for 2 seconds to reboot the system.
• Hold down the RESET switch for 14 seconds to initialize the Wi-Fi interface to
the factory default.
(1) Open the front panel and remove the Wi-Fi interface.
(2) Set up a connection between the Wi-Fi interface and the router.
Refer to the SETUP MANUAL and SETUP QUICK
REFERENCE GUIDE provided with the unit.
For SETUP MANUAL, please go to the website below.
http://www.melcloud.com/Support
(3) Put the Wi-Fi interface back and close the front panel
after the setup is completed.
(4) For MELCloud User Manual, please go to the website below.
http://www.melcloud.com/Support
NOTE:
Mitsubishi Electric’s Wi-Fi interface is designed for communication to Mit-
subishi 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-
tem or any product;(ii) system or product fault; or (iii) loss or damage to any
system or product; which is caused by or arises from connection to and/or use
of any third party Wi-Fi interface or any third party Wi-Fi service with Mitsubishi
Electric equipment.
For the latest information regarding MELCloud from Mitsubishi Electric
Corporation, please visit www.MELCloud.com.
NOTE:
When the Wi-Fi interface is reset to the factory default, ALL the configuration
information will be lost. Take great care in implementing this operation.
No. Item Description
1 MODE switch It selects modes.
2 RESET switch It resets the system and ALL settings.
3 ERR LED (Orange) It shows the network error state.
4NET LED (Green) It shows the network state.
5 MODE LED (Orange) It shows the Access point mode state.
6 UNIT LED (Green) It shows the indoor unit state.
Wi-Fi interface introduction
8-5. Wi-Fi INTERFACE SETTING UP
OBH766C

16
WIRELESS REMOTE CONTROLLER
MICROPROCESSOR CONTROL
9
NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the
remote controller with beeps.
Signal transmitting section
Operation display section
TEMPERATURE buttons
STOP/OPERATE
(OFF/ON) button
Indication of
remote controller
model is on back
Distance of signal : About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
FAN SPEED CONTROL button
PURIFIER button
DIRECTION button
OPERATION SELECT button
ECONO COOL button
POWERFUL button
CLOCK button
Lid
Slide the lid down
to open the remote
controller. Slide it down
further to get to the
weekly timer buttons.
WEEKLY TIMER
set buttons
TIME, TIMER set buttons
FORWARD button
BACKWARD button
RESET button
i-save button
NIGHT MODE button
SENSOR (i-see) button
VANE CONTROL button
WIDE VANE button
INDOOR UNIT DISPLAY SECTION
Operation Indicator lamp
The operation indicator at the right side of the indoor unit indicates the operation state.
•The following indication applies regardless of shape of the indication.
Indication Operation state Room temperature
Standby mode
(Only during multi system
operation)
-
Lit
Blinking
Not lit
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-
E1
,
ET1
MSZ-LN25VG2W-
E1
,
ET1
MSZ-LN35VG2W-
E1
,
ET1
MSZ-LN50VG2W-
E1
,
ET1
MSZ-LN60VG2W
MSZ-LN18VG2V-
E1
,
ET1
MSZ-LN25VG2V-
E1
,
ET1
MSZ-LN35VG2V-
E1
,
ET1
MSZ-LN50VG2V-
E1
,
ET1
MSZ-LN60VG2V
MSZ-LN18VG2B-
E1
,
ET1
MSZ-LN25VG2B-
E1
,
ET1
MSZ-LN35VG2B-
E1
,
ET1
MSZ-LN50VG2B-
E1
,
ET1
MSZ-LN60VG2B
MSZ-LN18VG2R-
E1
,
ET1
MSZ-LN25VG2R-
E1
,
ET1
MSZ-LN35VG2R-
E1
,
ET1
MSZ-LN50VG2R-
E1
,
ET1
MSZ-LN60VG2R
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
-2°C to -5°C and lets the AUTO fan speed of the indoor unit and the compressor frequency increase easily.
The applicable models are MSZ-LN**VG2W, MSZ-LN**VG2V, MSZ-LN**VG2B, and MSZ-LN**VG2R.
JR24
CN1J1CN151
INDOOR electronic control
P.C. board
CN102
OBH766C

17
WIRELESS REMOTE CONTROLLER
NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the
remote controller with beeps.
Signal transmitting section
Operation display section
TEMPERATURE buttons
STOP/OPERATE
(OFF/ON) button
Indication of
remote controller
model is on back
Distance of signal : About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
FAN SPEED CONTROL button
PURIFIER button
DIRECTION button
OPERATION SELECT button
CIRCULATOR button
POWERFUL button
CLOCK button
Lid
Slide the lid down
to open the remote
controller. Slide it down
further to get to the
weekly timer buttons.
WEEKLY TIMER
set buttons
TIME, TIMER set buttons
FORWARD button
BACKWARD button
RESET button
i-save button
NIGHT MODE button
SENSOR (i-see) button
VANE CONTROL button
WIDE VANE button
INDOOR UNIT DISPLAY SECTION
Operation Indicator lamp
The operation indicator at the right side of the indoor unit indicates the operation state.
•The following indication applies regardless of shape of the indication.
Indication Operation state Room temperature
Standby mode
(Only during multi system
operation)
-
Lit
Blinking
Not lit
MSZ-LN18VG2W- EN1 MSZ-LN25VG2W- EN1 MSZ-LN35VG2W- EN1 MSZ-LN50VG2W- EN1
MSZ-LN18VG2V- EN1 MSZ-LN25VG2V- EN1 MSZ-LN35VG2V- EN1 MSZ-LN50VG2V- EN1
MSZ-LN18VG2B- EN1 MSZ-LN25VG2B- EN1 MSZ-LN35VG2B- EN1 MSZ-LN50VG2B- EN1
MSZ-LN18VG2R- EN1 MSZ-LN25VG2R- EN1 MSZ-LN35VG2R- EN1 MSZ-LN50VG2R- EN1
OBH766C

18
9-2. DRY ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select DRY mode with OPERATION SELECT button.
(3) The set temperature is determined from the initial room temperature.
1. Coil frost prevention
Coil frost prevention works the same way as that in COOL mode. (9-1.1.)
2. Low outside temperature operation
Low outside temperature operation works the same way as that in COOL mode. (9-1.2.)
3. Indoor fan speed control
Indoor fan speed control works the same way as that in COOL mode. (9-1.3.)
9-3. FAN ( ) OPERATION
(1) OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select FAN mode with OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates.
Outdoor unit does not operate.
9-4. HEAT ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select HEAT mode with OPERATION SELECT button.
(3) Press TEMPERATURE buttons TEMP or button to select the desired temperature. The setting range is 10 - 31°C.
1. Cold air prevention control
When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room tem-
perature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.
2. High pressure protection
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con-
densing pressure from increasing excessively.
When the temperature of indoor heat exchanger becomes too high, the high pressure protection works.
The indoor fan operates following the cold air prevention control. This mode continues until the temperature of indoor
heat exchanger falls.
3. Defrosting
Defrosting starts when the temperature of outdoor heat exchanger becomes too low.
The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts.
This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.
9-5. AUTO CHANGE OVER ··· AUTO MODE OPERATION
Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation.
Mode selection
(1) Initial mode
When unit starts the operation with AUTO operation from OFF:
• If the room temperature is higher than the set temperature, operation starts in COOL mode.
• If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode.
(2) Mode change
COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 1°C below the
set temperature.
HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 1°C above the
set temperature.
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 or button to select the desired temperature. The setting range is 16 - 31°C.
1. Coil frost prevention
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil
from frosting.
When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor
heat exchanger rises.
2. Low outside temperature operation
When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.
3. Indoor fan speed control
When the thermostat turns OFF, the indoor fan operates very Low to reduce power consumption.
When the room temperature rises and the thermostat is ON, the indoor fan operates according to the settings on the
remote controller.
OBH766C

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”.
NOTE 2:
FOR MULTI SYSTEM AIR CONDITIONER
OUTDOOR UNIT: MXZ series
Multi system air conditioner can connect 2 or more indoor units with one outdoor unit.
• When you try to operate 2 or more indoor units with one outdoor unit simultaneously, one for the cooling and the
others for heating, the operation mode of the indoor unit that operates first is selected. Other indoor units cannot
operate, and operation indicator lamp blinks as shown in the figure below. In this case, please set all the indoor
units to the same operation mode.
• When indoor unit starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max.
10 minutes) to blow out the warm air.
• In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant flow-
ing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.
OPERATION INDICATOR
Lit
Blinking
Not lit
9-6. AUTO VANE OPERATION
1. Horizontal vane
(1) Vane motor drive
These models are equipped with stepping motors for the horizontal vanes. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approximately 12 V) transmitted from indoor microprocessor.
(2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL ( ) button.
Horizontal
position
4
In COOL and DRY operation
Vane angle is fixed to Horizontal position.
In HEAT operation
Vane angle is fixed to Angle 4.
AUTO 1 2 5 SWING43
(AUTO) (1) (2) (3) (4) (5) (SWING)
(5) STOP (operation OFF) and ON TIMER standby
In the following cases, the horizontal vane returns to the closed position.
(a) When STOP/OPERATE (OFF/ON) button is pressed (POWER OFF).
(b) When the operation is stopped by the emergency operation.
(c) When ON TIMER is ON standby.
(6) Dew prevention
During COOL or DRY operation with the lower position when the compressor cumulative operation time exceeds 1
hour, the vane angle automatically changes to Angle 1 for dew prevention.
NOTE: The right and left horizontal vanes set to the same level may not align perfectly.
(3) Positioning
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the
selected angle.
Confirmation of standard position is performed in the following cases:
(a) When the operation starts or finishes (including timer operation).
(b) When the test run starts.
(c) When standby mode (only during multi system operation) starts or finishes.
(4) VANE AUTO ( ) mode
In VANE AUTO mode, the microprocessor automatically determines the vane angle to make the optimum room tem-
perature distribution.
OBH766C

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.
(9) ECONO COOL ( ) operation (ECONOmical operation)
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2°C higher by the
microprocessor. However, the temperature on the LCD screen on the remote controller is not changed. Also the
horizontal vane swings in various cycle.
SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the
air conditioner can keep comfort. As a result, energy can be saved.
To cancel this operation, select a different mode or press one of the following buttons in ECONO COOL operation:
ECONO COOL, VANE CONTROL, LONG or POWERFUL button.
(10) POWERFUL ( ) operation
The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode.
The POWERFUL mode is cancelled automatically 15 minutes after operation starts, or when POWERFUL button
is pressed once again within 15 minutes after operation starts. The operation mode returns to the mode prior to
POWERFUL operation. To cancel this operation manually, select a different mode or press one of the following but-
tons within 15 minutes after operation starts: STOP/OPERATE (OFF/ON), ECONO COOL,
FAN SPEED CONTROL,
CIRCULATOR, or i-save button.
2. Vertical vane
(1) Vane motor drive
These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approximately 12 V) transmitted from microprocessor.
(2) The vertical vane angle and mode change as follows by pressing WIDE VANE CONTROL button.
(3) Positioning
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the
selected angle.
Confirmation of standard position is performed in the following cases:
(a) STOP/OPERATE (OFF/ON) button is pressed (POWER ON).
1 2 3 4 5
(SWING)
6
(4) SWING ( ) MODE
By selecting SWING mode with WIDE VANE CONTROL button, the vertical vane swings horizontally. The remote
controller displays “ ”. Swing mode is cancelled when WIDE MODE CONTROL button is pressed once again.
OBH766C