Hitachi RAC-18WPE, Service Manual, Page: 51 / 60

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