MFZ-KJ Service Manual

27
9-5. TROUBLE JUDGEMENT CRITERIA OF MAIN PARTS
MFZ-KJ09NA MFZ-KJ12NA MFZ-KJ15NA MFZ-KJ18NA
RED
YLW
BRN
ORN
GRN
ROTOR
Part name FigureCheck method and criteria
Indoor fan motor (MF)
Measure the resistance with a tester.
Refer to 9-7. "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: 50°F - 86°F (10°C - 30°C))
Normal
Measure the resistance between the terminals with a tester.
(Part temperature: 50°F - 86°F (10°C - 30°C))

Color of the lead wire
%51RWKHURQH
Horizontal vane motor
(MV2) BACK
Measure the resistance between the terminals with a tester.
(Part temperature: 50°F - 86°F (10°C - 30°C))
Check 9-6. “Check of indoor fan motor” and “Check of indoor
electronic control P.C. board and indoor fan motor”.
Normal

%51RWKHURQH
Color of the lead wire
Normal

%51RWKHURQH
Color of the lead wire
OPERATION INDICATOR
Not lighted
Blinking
Lighted
No.
SymptomOperation 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
OBH752A