Mitsubishi MCFH-13NV Service Manual page 48

Check of outdoor unit
D
Compressor and outdoor fan do not operate.(Only indoor fan operates.)
MCFH-24NV -
E3
Start
Operate the unit in COOL or HEAT mode by pressing the
EMERGENCY OPERATION switch.
3-minute time delay works.
Test run operation operates for 30 minutes.
Compressor
doesn't operate.
Is there 5V DC between
No
+
J101 - J401 on the deicer
P.C. board? w1
Yes
Is there 220-240V AC
No
between A1-A2 on the
compressor contactor(52C)?
Yes
Is there 220-240V AC
between 2/T1 on the
No
compressor contactor(52C)
and N on the outdoor
terminal block?
Yes
Check the compressor.
Outdoor fan motor
doesn't operate.
Is there 5V DC between No
+
J101 - J401 on the deicer
P.C. board? w1
Yes
Is there 220-240V AC
No
between CN711 1-3 or
2-3 on the deicer P.C.
board? w1
Yes
Check the outdoor fan
motor. Refer to page 45.
Is there 220-240V AC
No
between CN730 1-3 on
the deicer P.C. board? w1
Yes
Replace the
deicer P.C. board.
Replace the
deicer P.C. board.
Is there 220-240V AC
between 1/L1 on the No
compressor contactor(52C)
and N on the outdoor
terminal block?
Yes
Replace the compressor
contactor(52C).
Is there 220-240V AC
No
between CN730 1-3 on
the deicer P.C. board? w1
Yes
Replace the
deicer P.C. board.
Replace the
deicer P.C. board.
48
Make the connection
of wiring correct.
Make the connection
of wiring correct.
Make the connection
of wiring correct.