Hitachi RAS-25CNH1 Service Manual page 99

LD301: Blinks 6 times.
OH thermistor temperature rises
LD301: Blinks 5 times.
Overload lower limit cut
LD301: Blinks 4 times.
Switching failure
LD301: Blinks 3 times.
Abnormally low rotation speed
NO
Is the thermistor circuit normal?
YES
NO
Leakage of refrigerant or
compressor defective.
YES
Replace the control P.W.B.
NO
Is the power module normal?
YES
Are position detection circuit and
drive circuit PS-HIC normal?
Replace parts in the thermistor
circuit.
Replace defective parts.
Replace the power module.
Replace defective parts.
Check the continuity of replaced
parts.
Perform continuity check of the
leads and pattern according to the
P.W.B. diagram and circuit dia-
gram.