25
10-5. TROUBLE JUDGEMENT CRITERIA OF MAIN PARTS
MFZ-KJ25VE MFZ-KJ25VE2
MFZ-KJ35VE MFZ-KJ35VE2
MFZ-KJ50VE MFZ-KJ50VE2
RED
YLW
BRN
ORN GRN
ROTOR
Part name
Figure
Check method and criteria
Indoor fan motor (MF)
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.
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12 (MAIN 1), RT13 (SUB)
RT14 (MAIN 2), RT15 (MAIN 3))
Horizontal vane motor
(MV1) FRONT
Multi-flow vane motor
(MV3)
Measure the resistance between the terminals with a tester.
(Part temperature: 10°C ~ 30°C)
Normal
Measure the resistance between the terminals with a tester.
(Part temperature: 10°C ~ 30°C)
306 Ω ~ 382 Ω
Color of the lead wire
BRN-other one (350 Ω)
Horizontal vane motor
(MV2) BACK
Measure the resistance between the terminals with a tester.
(Part temperature: 10°C ~ 30°C)
Check 10-6.
“Check of indoor fan motor” and “Check of indoor
electronic control P.C. board and indoor fan motor”.
Normal
219 Ω ~ 273 Ω
BRN-other one (250 Ω)
Color of the lead wire
Normal
219 Ω ~ 273 Ω
BRN-other one (250 Ω)
Color of the lead wire
OPERATION INDICATOR
Not lighted
Blinking
Lighted
No.
Symptom
Operation indicator lamp
Condition
Remedy
Abnormal
point
1
MXZ type
Operation
mode
setting
Outdoor unit
operates but
indoor unit
does not
operate.
When the operation mode of the each indoor
unit is differently set to COOL (includes DRY)
and HEAT at the same time, the operation
mode of the indoor unit that has operated
first has the priority.
• Select the same operation mode
for all the units.
Refer to the outdoor unit
service manual.
2.5-second OFF
Right lamp flash
OBH666C
