41
MSH-C24TV
Yes
Is there 5V DC between
J101
- J401 on the deicer
P.C. board?
Refer to page 46.
Compressor
doesn't operate.
Yes
Is there 230V AC between
A1-A2 on the compressor
contactor(52C)?
Operate the unit in COOL or HEAT mode
by pressing the EMERGENCY
OPERATION switch.
Test run operation operates for 30 minutes.
Outdoor fan motor
doesn't operate.
No
Make the connection
of wiring correct.
Check the compressor.
Replace the compressor
contactor(52C).
Start
Yes
Is there 230V AC between
2/T1 on the compressor
contactor(52C) and
N
on the
outdoor terminal block?
Yes
Is there 230V AC between
CN730
1
-
3
on the deicer
P.C. board?
Replace the
deicer P.C. board.
Replace the
deicer P.C. board.
No
Yes
No
Is there 230V AC between
1/L1 on the compressor
contactor(52C) and
N
on the
outdoor terminal block?
No
No
Make the connection
of wiring correct.
Yes
Yes
Is there 230V AC CN711
1
-
3
or
2
-
3
on the deicer
P.C. board?
No
Make the connection
of wiring correct.
Check the outdoor fan
motor. Refer to page 38.
Yes
Replace the
deicer P.C. board.
Replace the
deicer P.C. board.
No
No
Is there 230V AC between
CN730
1
-
3
on the deicer
P.C. board?
Is there 5V DC between
J101 - J401 on the deicer
P.C. board?
Refer to page 46.
+
-
+
-
Check of outdoor unit
<MSH-C24TV only>
After 30 seconds,
does compressor stop?
No
Yes
Is there 230V AC between
A1-A2 on the compressor
contactor(52C)?
Replace the
deicer P.C. board.
Yes
1
Turn OFF the power supply.
2
After 30 seconds, turn ON the power supply again.
3
Operate the unit in COOL or HEAT mode by pressing the
EMERGENCY OPERATION switch for 1 minute or more.
4
Stop it by pressing the EMERGENCY OPERATION
switch twice or once.
Ok
No
After 30 seconds, does
outdoor fan motor stop?
Replace the
deicer P.C. board.
Yes
Ok
No
Is there 230V AC between
2/T1 on the compressor
contactor(52C) and
N
on
the outdoor terminal block?
Yes
Replace the
compressor
contactor(52C).
No
Make the connection
of wiring correct.
Compressor and/or outdoor fan motor doesn’t stop.
E
OB279-2.qxp 2/15/01 10:55 AM Page 41
