82
Check of R.V. coil
The cooling operation or heating operation does not operate.
No
Yes
No
Yes
No
Yes
No
Yes
1. Disconnect the lead wire leading to the compressor.
2. 3 minutes after turning ON the power supply, start EMERGENCY
OPERATION in COOL mode.
Is there voltage of 208/230 V AC between pin1
and pin2 at connector CN712?
Turn OFF the power supply.
Disconnect the connector CNAC2.
Replace the 4-way valve.
Replace the outdoor
control P.C. board.
Replace the R.V. coil.
Is there voltage 208/230 V AC
between the pin1 and pin3 at
connector CNAC?
Replace the outdoor
power P.C. board.
Is there normal resistance
to R.V. coil? (Refer to 11-5.)
1. Disconnect the lead wire leading to the compressor.
2. 3 minutes after turning ON the power supply, start EMERGENCY
OPERATION in HEAT mode.
Is there voltage of 208/230 V AC between pin1
and pin2 at connector CN712?
Replace the 4-way valve.
Replace the outdoor control P.C. board.
• When cooling operation does not work.
• When heating operation does not work.
CNAC
CN712
Outdoor control
P.C. board
CNAC2
Outdoor power
P.C. board
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