There is the possibility that the cycle load may have become extremely
heavy. Check the compressor.
Check the electric expansion valve.
Clean the filter.
Check the position of the external unit. If there is a problem, install according
to the recommended conditions.
Insert the power source and operate, and
then check to see that the external fan is
rotating.
Check to see that the 2A fuse of the FM
P.W.B. is not burnt out.
The protection circuit may
cause the fan to stop when
the wind is extremely strong
in the place where the
external unit is installed or
when the external unit is
covered.
The compressor may be too hot. Check to
see that the coolant is not leaking.
There is the possibility that the electric expansion valve
may not be working. Replace the electric expansion
valve.
Use a tester to measure the resistance of the lines on the fan motor. You
can measure the resistance of the lines on the fan motor by removing the
fan motor connector and measuring between the pins. 110 ½±20% is
normal.
External fan
rotates
Not burnt out
External fan rotates,
but soon stops.
No coolant leak
Coolant leak
abnormally
The compressor does not accelerate.
Check to see that the coolant is not
leaking.
Normal
Normal
The FM P.W.B. is broken.
Replace the FM P.W.B.
Burnt out
No problems
with installation
position
External fan rotates normally
abnormally
abnormally Normal
Normal
LD301: Blinks five times
Overload stop
LD 301: Blinks six times
Overheating stop
Remove the fan motor connector, and check to see
that the shaft of the fan motor rotates.
Replace the fan motor.
Refill the coolant
Coolant leak
Refill the coolant
Replace the control P.W.B.
The SPM2 is broken. Replace the SPM2.
Replace the electric expansion valve or the switch power P.W.B.
Check the compressor.
Check the compressor.
The FM P.W.B. may be broken.
Replace the FM P.W.B.
LD301: Blinks eight times
Acceleration abnormally
LD301: Blinks thirteen times
E
2
PROM error
LD301: Blinks fourteen times
ACT error
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