Hitachi RAC-35WPC Service Manual page 51

Yes
The LD301 blinks 5 times.
Overload lower limit cut
No
Yes
The LD301 blinks 4 times.
Switchover failure
No
Yes
The LD301 blinks 3 times.
Abnormally slow rotation
No
Yes
The LD301 blinks twice
Peak current cut
When cooling: Is the heat exchanger of the outdoor unit clogged up?
When heating: Is the heat exchanger or filter of the indoor unit
Since the compressor
load was heavy, the
product was stopped.
Is the freezing cycle abnormal?
This is a failure in starting up the compressor.
Check the compressor connectors for
looseness and continuity.
The product detected an abnormality in the control
of the compressor and stopped its operation.
Either the load may be heavy or the drive circuit
may be abnormal.
The product detected a current abnormality in the
compressor and stopped its operation. Either the
load may be heavy or the drive circuit may be
abnormal.
Is there shelter around?
clogged up?
No
No
Does the service valve open ?
Yes
Check the compressor for
loose connectors and cord
continuity
Normal
Please check the setting of
the leakage breaker.
Please confirm the nsulation
of the compressor. and check it
Conduct a [self-check]
51
Yes
Clear up the causation ?
Yes
Remove the cause of the problem.
Correct the abnormal location.
No
Please open it.
Abnormal
Correct the abnormal location.
No
Abnormal
i
Change the co pressor. and check the
outdoor ele. unit.
Normal
According to the result of the [ self-check]
confirm the break down parts, change it.
m