Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 1090 / 1106

1088
FDC-HKXR
(4) Proceduer for checking the outdoor unit irrespective of indoor/outdoor transmission
Turn off the outdoor unit power supply
Set 45 in outdoor unit No.
Turn ON the outdoor unit PCB(SW
3-7
)
Turn ON the outdoor unit power supply
Turn OFF the outdoor unit power supply
Return outdoor unit NO. to the installation state.
Defective outdoor unit PCB
Open the 63H
1
Defective 52C
Defective outdoor unit PCB or
indoor unit PCB
(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.17 on the PCB)
Is the 52C
turnd ON?
Does a voltage
Appear at the 52C coil.
Can the compressor
operate at 35Hz?
(Continued to the previous page)
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.
Note( 1) After the compressor is operated, stop it at once.
Note (1) Otherwise, it will cause a failure to the compressor.
YES
NO YES
NO
YES
NO
1