LD301 blinks 6 times.
The temperature at the
OH thermistor rises.
Is the thermistor circuit
normal?
Replace parts in the
thermistor circuit.
LD301 blinks 5 times.
Overload lower limit cut.
Replace the main P.W.B.
*Check to see if the refr
igerating cycle is defective.
*Check the indoor unit f
or clogged heat exchanger or filter.
*Check the outdoor unit f
or defective shielding.
LD301 blinks 4 times.
F
ailure of switching.
Is the 15V power supply
output normal?
(Power P.W.B. display)
Is the intelligent power
module (IPM) normal?
(Inverter section)
The intelligent power module
may be defective.
Replace the main P.W.B.
* See “System Power
Module Diagnosis”.
With CN3 and CN4
disconnected, is the 15V
output between
“15V” and
”15-0V” on the power
P. W . B . ?
Replace the pow
er P.W.B.
LD301 blinks 3 times
.
Abnormal low speed.
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Yes
No
No
No
No
No
No
No
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