Service manual

23
The unit does not operate with the remote controller.
Also, POWER lamp does not light up by pressing EMERGENCY OPERATION switch.
Check of indoor electronic control P.C. board and indoor fan motor
C
Yes
No
w1. The fan motor connector's 1 lead wire is red, whereas 3 is black.

w2. Connect "+" of the tester to fan motor connector's 1 lead
wire, and "-" to 3 lead wire, otherwise the resistance cannot be
measured properly.

Yes
No
Does the unit operate with the remote controller?
Does POWER lamp light up by pressing EMERGENCY 
OPERATION switch?
Turn OFF the power supply.
Remove indoor fan motor connector CN211, vane motor 
connector CN151 front panel driving motor connector
CN1U1 and the i-see Sensor motor connector CN110 
from the indoor electronic control P.C. board and turn 
ON the power supply.
Measure the resistance of the horizontal vane
motor coil and the vertical vane motor coil.
Refer to 9-5.
Measure the resistance between CN211 3
and 4 of the indoor fan motor connector.
Short/open circuit:
Replace the indoor fan motor.
Short/open circuit:
Replace the horizontal vane motor, the 
vertical vane motor and the indoor
electronic control P.C. board.
Turn OFF the power supply.
Check both “parts side” and “pattern 
side” of the indoor electronic control P.C. 
board visually.
Replace the varistor(NR11) and fuse(F11).
Are the varistor(NR11) burnt
and the fuse(F11) blown?
Be sure to check both the fuse 
and the varistor in any case.
No
Yes
No
Is the fuse(F11) blown only?
Yes
No
Is the resistance 1M"
or more?
Measure the resistance between
1(+) and 3(-) of the indoor fan
motor connector (to CN211 on the
indoor electronic control P.C. board) .
w1,w2
Replace the fuse (F11).
Replace the fuse (F11) and the indoor fan motor.
Is the resistance
approx. 4"?
Measure the resistance of cement 
resistance R111 on the indoor electronic
control P.C. board.
Replace the indoor electronic control P.C. board.
Replace the indoor electronic control P.C. board
and the indoor fan motor.
Yes
Measure the resistance of the i-see Sensor 
motor coil.
Refer to 9-5.
Measure the resistance of the front panel 
driving motor coil.
Refer to 9-5.
Short/open circuit:
Replace the front panel driving motor 
and the indoor electronic control P.C. 
board.
Short/open circuit:
Replace the i-see Sensor motor and the 
indoor electronic control P.C. board.

CN211
Fuse(F11)
Varistor(NR11)
CN201
Indoor electronic
control P.C.Board
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