Mitsubishi Electric MFZ-KJ25VE Service Manual page 25

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