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Check of outdoor unit
D
Compressor and / or outdoor fan doesn’t operate.
Is there 208/230V AC
between
L1 - L2 on the
outdoor terminal block
?
No
Check the outdoor power supply
and connection of wiring.
Yes
Compressor
does not operate.
Yes
3minutes after the power
supply turns ON, is there
208/230V AC between
A1-A2 on the compressor
contactor(52C)?
Operate the unit in
COOL mode by pressing
the EMERGENCY
OPERATION switch.
Outdoor fan motor
does not operate.
No
Make the connection
of wiring correct.
Check the compressor.
Replace the compressor
contactor.
Turn ON the power supply.
Yes
Is there 208/230V AC
between 2/T1 on the
compressor contactor(52C)
and
L2 on the outdoor
terminal block?
Yes
Is there 208/230V AC
between CN730 1-3 on the
outdoor electronic control
P.C. board? w1
Replace the outdoor
electronic control
P.C. board.
No
Yes
No
Is there 208/230V AC
between 1/L1 on the
compressor contactor(52C)
and L2 on the outdoor
terminal block?
No
No
Make the connection
of wiring correct.
Yes
Yes
Yes
Is there 208/230V AC
between CN711 2-3 on
the outdoor electronic
control P.C. board? w1
Operate the unit in
COOL mode by pressing
the EMERGENCY
OPERATION switch.
No
Make the connection
of wiring correct.
Check the outdoor fan
motor. Refer to page 30.
Yes
No
No
Is there 5V DC between
J101 - J401 on the
outdoor electronic control
P.C. board? w1
+
w1 Refer to page 38.
Replace the outdoor
electronic control
P.C. board.
Is there 5V DC between
J101 - J401 on the
outdoor electronic control
P.C. board? w1
+
Is there 208/230V AC
between CN730 1-3 on the
outdoor electronic control
P.C. board? w1
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 33