Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 933 / 1106

FDC-HKX
931
2) Procedure for checking the outdoor unit irrespective of indoor/outdoor transmission
Note (1) When using this procedure, the indoor unit enters a transmission error state. In the indoor unit the expansion valve
may be closed or the fan may stop.
After the compressor is operated, stop it at once.
Otherwise, it will cause a failure to the compressor.
Turn off the outdoor unit power supply
(Or pull out the connector CnA
2
on the outdoor unit PCB)
(When connecting the CnA
2
on the outdoor unit PCB)
(Pull out Faston No.T24 on the PCB)
Set 45 in outdoor unit No.
Turn ON the outdoor unit PCB (SW
3-8
)
Turn ON the outdoor unit power supply
Open the 63H
1
Turn OFF the outdoor unit power supply
Return outdoor unit No. to the installation state.
Is the 52C
turned ON?
Does a voltage
Appear at the 52C coil
Can the compressor
(1)
operate at 35Hz?
Defective 52C
Defective outdoor unit PCB
Defective outdoor unit PCB or
indoor unit PCB.
1
(Continued to the previous page)
NO
NO YES
NO
YES
YES