Mitsubishi Electric MSZ-GA35VA Service Manual page 16

OPERATION INDICATOR
NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
Self check table
Abnormal
No. Operation indicator lamp
point
All lamps flash at the same time.
Attachment
of the 0.5-second ON
1
horizontal
vane
0.5-second OFF
OPERATION INDICATOR
Abnormal
No. Operation indicator lamp
point
Right lamp flash
MXZ type
Operation
1
mode
2.5-second OFF
setting
NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (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.
9-5. Trouble criterion of main parts
MSZ-GA22VA -
E1
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))
Indoor fan motor(MF)
Horizontal vane
motor(MV)
Lighted · Flashing of OPERATION INDICATOR lamp (all lamps) indicates abnormality.
Blinking
Not lighted
Symptom
Indoor unit
and outdoor
unit do not
operate.
Lighted
· Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates
abnormality.
Blinking
· OPERATION INDICATOR lamp (left-hand side lamp) is lighted.
Not lighted
Symptom
Outdoor unit
operates but
indoor unit
does not
operate.
MSZ-GA25VA -
E1
Check method and criterion
Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)
Normal
8 k" ~ 20 k"
Check 9-6. A.
Measure the resistance between the terminals with a tester.
(Part temperature 10 C ~ 30 C)
Color of the lead wire
BRN-other one 235 " ~ 255 "
Detection method
When the electricity is not conducted to the
interlock switch (Fan) of the horizontal vane.
Detection method
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.
MSZ-GA35VA -
E1
Abnormal
Open or short-circuit
Abnormal
Normal
Open or short-circuit
16
Check point
• Refer to 9-6.E "Check of
installation of the horizontal
vane".
Check point
• Unify the operation mode.
Refer to service manual
OB377.
Figure
RED
ROTOR
YLW
BRN
ORN GRN