42
i Check of outdoor fan motor
Is the resistance between each ter-
minal of outdoor fan motor normal?
(Refer to 11-4.)
Disconnect CN932 from the inverter P.C. board, and turn on the
power supply.
Rotate the outdoor fan motor manually and measure the voltage
of CN931.
Between 1(+) and 5(-)
Between 2(+) and 5(-)
Between 3(+) and 5(-)
Does the voltage between each terminal become 5 and 0
VDC repeatedly?
Does the outdoor fan motor rotate smoothly?
Replace the outdoor fan motor.
Replace the inverter P.C. board.
Yes
Yes
No
(Fixed to either 5 or 0 VDC)
No
No
Yes
Disconnect the connectors CN931
and CN932 from the inverter P.C.
board.
Check the connection between the
connector CN931 and CN932.
J Check of power supply
Is there voltage 230 VAC
between the indoor terminal
block S1 and S2?
No
Yes
Replace the indoor
electronic control P.C.
board.
Rectify indoor/outdoor
connecting wire.
Yes
If lights up, OK.
If fl ashes, refer to 11-3.
Does the upper lamp of
OPERATION INDICATOR on the
indoor unit light up?
Does LED on the inverter P.C.
board light up or fl ash? (Refer
to 11-6.3.)
No
Replace the inverter
P.C. board.
Is there bus-bar voltage 325 - 370
VDC between JP715 (+) and JP30
(–) on the inverter P.C. board?
(Refer to 11-6.3.)
No
Check the electric parts in main circuit.
Yes
Yes
No
Disconnect the connector between
compressor and intelligent power
module.
Turn ON power supply and press
EMERGENCY OPERATION switch.
325 -370 VDC
JP30 JP715
[SUZ-KA60/71VA3.TH]
OCH530
