ā 134 ā
The LD301 blinks 10 times.
Power supply voltage error
The LD301 blinks 7 times.
Thermistor abnormality
The LD301 blinks 6 times.
OH thermistor heat-up
The LD301 blinks 5 times.
Overload lower limit cut
Is there 220 V AC between
terminal boards A and B?
187 V AC or less, 253 V AC or more
Check the power supply.
Is there a voltage of 264-358 V DC?
For measuring points, see the instruction plate on the lid of the
electrical parts.
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Replace the outdoor electrical parts
(in the case of an abnormality in the full
wave/double voltage relay or rectification
circuit).
187-253 V AC
Replace the outdoor electrical parts
(in the case of an abnormality in the
voltage detection circuit).
Check for loose or poorly inserted thermistors.
Connect the thermistors.
Check the thermistors for wire breaks and short-circuits.
Replace any abnormal
thermistors.
Replace the outdoor electrical parts
(in the case of an abnormality in the thermistor
detection circuit).
Check the OH thermistor for wire breaks and short-circuits.
Replace the OH thermistor.
Check if the OH thermistor is not loose or poorly inserted.
Connect the OH thermistor.
Normal
Normal
Normal
Normal
Normal
Review the freezing cycle.
(Refrigerant leakage or other
reason is conceivable.)
If reviewing the freezing cycle does not
correct the problem, replace the outdoor
electrical parts (in the case of an
abnormality in the thermistor detection circuit).
The OH thermistor has
detected heat-up in the
compressor.
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?
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.
Ye s
No
Ye s
Ye s
Ye s
No
No
No
No
No
Ye s
Ye s
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