Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 1092 / 1106

1090
FDC-HKXR
YES
YES
YES
NO
NO YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
YES
YES
Check the outdoor unit
control PCB.
Check the wire between the
capacitor and Cn2 and check
the connector.
Check the compressor.
Defective inverter PCB
→
Replacement
Defective inverter PCB
→
Replacement.
Defective capacitor
→
Replacement.
Defective reactor
→
Replacement.
Defective 73X
→
Replacement.
Defective diode module
→
Replacement.
Defective noise filter
→
Replacement.
Defective resistance R
1
→
Replacement.
Defective power transistor
module
→
Replacement
NO
1
2
3
4
5
6
7
NO
NO
NO
NO
NO
NO
NO
NO
Is an outdoor
provided at the Cn13
and 14 on the inverter
PCB?
Is AC200V
provided at U, V and
W on the power tran-
sistor module?
YES
Does
the LD
1
(green)
on the inverter PCB
flashing
Is 52C turned ON?
Is DC280V
provided between
+ and - of the
capacitor?
Is DC280V is
provided at the Cn2 on
the inverter PCB?
Is the capacitor
normal?
Is there continuity
in the reactor?
Is the resistance
value of the resistance
R
1
is proper?
Is the 73X good?
Is the diode
module good?
(FDCP2501 type only)
Is there continuity
in the noise filter?
Check the 52C.
◆
Troubleshooting on the inverter side
(1) Troubleshooting procedure (For the details of 1 to 7, refer to Outfoor Unit Check Pointd on the next page.)