Mitsubishi MSH-18RV User Manual

62
Is there 220-240V AC
to between
L-N 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
220-240V AC between
A1-A2 on the compressor
contactor?
Operate the unit in
COOL or HEAT 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(52C).
Turn ON the power supply.
Yes
Is there 220-240V AC
between 2/T1 on the
compressor contactor(52C)
and N on the outdoor
terminal block?
Yes
Replace the
deicer P.C. board.
Replace the
deicer P.C. board.
No
Yes
No
Is there 220-240V 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
Yes
Is there 220-240V AC
between CN711 1-3 or
2-3 on the deicer P.C.
board? w1
Operate the unit in
COOL or HEAT mode by
pressing the EMERGENCY
OPERATION switch.
No
Make the connection
of wiring correct.
Check the outdoor fan
motor. Refer to page 58.
Yes
Is there 220-240V AC
CN730 1-3 on the deicer
P.C. board? w1
Replace the
deicer P.C. board.
Replace the
deicer P.C. board.
No
No
Is there 5V DC between
J101 - J401 on the deicer
P.C. board? w1
Is there 220-240V AC
between CN730 1-3 on
the deicer P.C. board? w1
+
Is there 5V DC between
J101 - J401 on the deicer
P.C. board? w1
+
w1 Refer to page 70.
MSH-30RV
OB272-2.qxp 02.1.26 1:23 PM Page 62

Mitsubishi MSH-18RV Specifications

General

Brand	Mitsubishi
Model	MSH-18RV
Category	Air Conditioner
Language	English