22
Check the
continuity of
indoor and
outdoor unit
Replace the indoor electronic
control P.C. board.
Check of indoor electronic control P.C. board
C
The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
Check of outdoor unit
D
Compressor and outdoor fan do not operate.(Only indoor fan operates.)
Check the voltage to terminal block
of outdoor unit.
Is there 220-240V AC to terminal
block between
2
-
N
?
Press the EMERGENCY
OPERATION switch.
3-minute time delay works.
Test run operation operates for 30
minutes.
Start
Check the voltage to terminal block
of indoor unit.
Is there 220-240V AC to terminal
block between
2
-
N
?
No
Yes
No
Yes
Check the outdoor
wiring, the outdoor
fan motor and
compressor.
Check the both “parts side”and “pattern side” of
indoor electronic control P.C. board visually.
Replace the fuse.
Is fuse(F11) blown?
Be sure to check both fuse
and varistor in any case.
Replace the fan
motor .
Trouble of the
indoor electronic
control P.C. board.
Is winding
resistance of
fan motor 0
"
?
Is winding
resistance of
vane motor 0
"
?
No
Yes
Replace the vane
motor.
No
Yes
Yes
Is varistor(NR11) burnt?
Replace the varistor.
Yes
Turn OFF the power supply.
Remove indoor fan motor connector CN211 and vane
motor connector CN151 from the indoor electronic
control P.C. board and turn ON the power supply.
No
No
The unit doesn’t operate with the remote controller.
Also, the Operation Indicator lamp doesn’t light up
by pressing the EMERGENCY OPERATION switch.
No
Yes
1.Pull out the power
supply cord.
2.Measure resistance
between CN201
1
on
the indoor electronic
control P.C. board
and
N
on the terminal
block with a tester.
Is resistance 0
"
?
Trouble of fuse (F12)
CN201
2
1
L
N
F12
1
3
Terminal
block
Be sure to check both fresistance.
Yes
No