Trouble Criterion Of Main Parts - Mitsubishi Electric MSZ-LN18VG2W-E1 Service Manual

OPERATION INDICATOR
(POWER)
(AIR PURIFYING)
Abnormal
No. Operation indicator lamp
point
• AIR PURIFYING lamp blink.
MXZ type
Operation
1
2.5-second OFF
mode
setting
• POWER lamp is lit.
OPERATION INDICATOR
(POWER)
(AIR PURIFYING)
Abnormal
No. Operation indicator lamp
point
AIR PURIFYING lamp blinks.
AIR
PURIFYING
2.5-second OFF
1
power
control

10-5. TROUBLE CRITERION OF MAIN PARTS

MSZ-LN18VGW MSZ-LN25VGW MSZ-LN35VGW MSZ-LN50VGW MSZ-LN60VGW
MSZ-LN18VGV MSZ-LN25VGV
MSZ-LN18VGB MSZ-LN25VGB
MSZ-LN18VGR MSZ-LN25VGR
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
Part name
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor (MF)
Vane motor (MV1)
(HORIZONTAL)
Vane motor (MV2)
(VERTICAL)
i-see SENSOR MOTOR
(MT)
AIR PURIFYING power
OBH766C
Lit
Blinking
Not lit
Symptom
Outdoor unit
operates but
indoor unit does
not operate.
Lit
Blinking
Not lit
Symptom
Indoor unit and
outdoor unit do
not operate.
MSZ-LN35VGV
MSZ-LN35VGB
MSZ-LN35VGR
Check method and criterion
Measure the resistance with a tester.
Refer to 10-7. "Test point diagram and voltage", "Indoor electronic control
P.C. board", for the chart of thermistor.
Check 10-6. "Check of indoor fan motor".
Measure the resistance between the terminals with a tester.
(Temperature: 10 - 30°C)
Color of the lead wire
RED - SKY
Measure the resistance between the terminals with a tester.
(Temperature: 10 - 30°C)
Color of the lead wire
RED - SKY
Measure the resistance between the terminals with a tester.
(Temperature: 10 - 30°C)
Color of the lead wire
RED - BLK
Check 10-6. .
Condition
The operation mode of the each indoor unit is
differently set to COOL (includes DRY, FAN)
and HEAT at the same time, the operation
mode of the indoor unit that has operated at
first has the priority.
Condition
When AIR PURIFYING power cannot be
turned OFF even if the AIR PURIFYING
operation is turned OFF by remote controller.
MSZ-LN50VGV
MSZ-LN50VGB
MSZ-LN50VGR
Normal
262 - 328 Ω
Normal
219 - 273 Ω
Normal
262 - 328 Ω
34
Remedy
• Unify the operation mode.
Refer to outdoor unit service
manual.
Remedy
• Refer to 10-6. "Check of AIR
PURIFYING power".
MSZ-LN60VGV
MSZ-LN60VGB
MSZ-LN60VGR
Figure
SKY
ROTOR
SKY
RED
SKY SKY
SKY
ROTOR
SKY
RED
SKY SKY
BLK
ROTOR
BLK
RED
BLK
BLK