31
-1. Check of indoor fan motor (upper)
A
When the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right lamp of OPERATION INDICATOR
lamp is not lighted.
Indoor fan does not operate.
If more than 12 seconds passes after EMERGENCY OPERATION switch
is pressed, the voltage mentioned in above 2) goes 0V DC although the
indoor electronic control P.C. board is normal.
Pay careful attention to the high voltage on
the fan motor connector CN211.
Yes
No
No
No
(Changed)
Yes
(Unchanged)
Is there anything that interferes the
rotation of the line flow fan?
Turn OFF the power supply.
Remove the object and
adjust the line flow fan.
Turn ON the power supply, wait 5 seconds or more, and then press
EMERGENCY OPERATION switch.
Measure the supply voltage as follows within 12 seconds
after EMERGENCY OPERATION switch is pressed.
If more than 12 seconds passes by, turn OFF the power supply and
turn it ON again, then measure the voltage.
1) Measure the voltage between CN211 (+) and (-).
2) Measure the voltage between CN211 (+) and (-).
Is there 325V DC between
CN211 (+) and (-), and does
the voltage between CN211 (+)
and (-) rise to the range between 3
and 6V DC within 12 seconds after
EMERGENCY OPERATION switch
is pressed?
Yes
Replace the indoor fan motor.
Replace the indoor electronic control P.C. board.
The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3 times, and then stops.
Measure the voltage between CN211
(+) and (-) while the fan
motor is rotating.
Is 0V DC or 15V DC
held unchanged?
Replace the indoor fan motor.
Replace the indoor electronic control P.C. board.
The indoor fan motor error has occurred, and the indoor fan does not operate.
JR06
JR05
CN211
Fuse (F11)
IC101
T11
VARISTOR (NR11)
Indoor electronic
control P.C. Board
CN212
CN151
CN152
CN1X1 CN1Y1
C111
R111
10-6. TROUBLESHOOTING FLOW
OB409E
