30
OPERATION INDICATOR
Not lit
Blinking
Lit
NOTE:
When the indoor unit has started operation and the above failures are detected (the first detection after the power ON),
the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.
Right lamp flash
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 at
first has the priority.
Unify the operation mode.
Refer to outdoor unit
service manual.
2.5-second OFF
· Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates
abnormality.
· OPERATION INDICATOR lamp (left-hand side lamp) is lighted.
11-5. TROUBLE JUDGEMENT CRITERIA OF MAIN PARTS
MLZ-KP25VF MLZ-KP35VF MLZ-KP50VF
Part name
Figure
Check method and criteria
Indoor fan motor
Measure the resistance with a tester. (Part temperature 10°C ~ 30°C)
Normal
NaN
Room temperature
thermistor (RT11)
Indoor coil thermistor
5757570$,1
RT13 (SUB))
Horizontal vane
motor (MV1)
Measure the resistance between the terminals with a tester.
3DUWWHPSHUDWXUH&a&
Vertical vane
PRWRU09
Measure the resistance between the terminals with a tester.
3DUWWHPSHUDWXUH&a&
Normal
BLUE-BLUE (Drain pump side)
RED-RED (Control P.C. board side)
Measure the resistance between the terminals with a tester.
3DUWWHPSHUDWXUH&a&
a
Color of the lead wire
Normal
RED-YLW
(DFKSKDVH
Color of the lead wire
Normal
RED-YLW
(DFKSKDVH
Color of the lead wire
&KHFN
.
Float sensor (FS)
Drain pump (DP)
YLW
YLW
RED
YLW
YLW
ROTOR
Disconnect connector and check with a tester.
Check open or short according to the float position.
Float sensor
Float sensor
Float
Float
Float
position
Normal
Short
Open
OBH801
