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Check of outdoor unit
E
Compressor and / or outdoor fan motor doesn’t stop.
After 30 seconds,
does compressor stop?
No
Yes
Is there 208/230V AC
between A1-A2 on the
compressor contactor(52C)?
Yes
1 Turn OFF the power supply.
2 After 30 seconds, turn ON the power supply again.
3 Operate the unit in COOL mode by pressing the
EMERGENCY OPERATION switch.
4 Operate the unit for 1 minute or more and stop it by
pressing the EMERGENCY OPERATION switch again.
Ok
No
After 30 seconds, does
outdoor fan motor stop?
Yes
Ok
No
Is there 208/230V AC
between 2/T1 on the
compressor contactor(52C)
and L2 on the outdoor
terminal block?
Yes
Replace the compressor
contactor(52C).
No
Make the connection
of wiring correct.
Replace the outdoor
electronic control
P.C. board.
Replace the outdoor
electronic control
P.C. board.
OB311--2.qxp 04.1.13 10:01 AM Page 34