Hitachi RAF-25NH4 Données Techniques page 247

LD301: Blinks five times Insert the power source and operate, and
then check to see that the external fan is
Overload stop
rotating.
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.
External fan rotates normally
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.
LD 301: Blinks six times
The compressor may be too hot. Check to
Overheating stop
see that the coolant is not leaking.
Refill the coolant
LD301: Blinks eight times
The compressor does not accelerate.
Acceleration abnormally
Check to see that the coolant is not
leaking.
Refill the coolant
LD301: Blinks thirteen times
Replace the control P.W.B..
2
E PROM error
LD301: Blinks fourteen times
The SPM2 is broken. Replace the SPM2.
ACT error
External fan
rotates
Check to see that the 2A fuse of the FM
P.W.B. is not burnt out.
External fan rotates,
but soon stops.
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
No problems
normal.
with installation
position
No coolant leak
There is the possibility that the electric expansion valve
may not be working. Replace the electric expansion
valve.
Coolant leak
Replace the electric expansion valve or the switch power P.W.B..
Normal
Check the compressor.
Coolant leak
Burnt out
Not burnt out
abnormally
Replace the fan motor.
Normal
abnormally
The FM P.W.B. is broken.
Replace the FM P.W.B..
Normal
Remove the fan motor connector, and check to see
that the shaft of the fan motor rotates.
abnormally
The FM P.W.B. may be broken.
Replace the FM P.W.B..
Check the compressor.
Normal
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