Hitachi RAS-50WX8 Service Manual page 153

Yes
LD301 blinks 8 times.
Acceleration defect.
LD301 blinks 7 times.
Thermistor abnormal.
No
Is the power module normal?
Yes
No
Is the drive circuit normal?
Is the thermistor connector
Yes
disconnected?
※The problem may be
"forgetting to connect after
servicing".
No
No
Is the continuity of thermistor
normal?
Yes
No
Is the thermistor circuit normal?
Replace the power module.
Replace any defective parts.
Connect the thermistor.
Replace the thermistor.
Replace parts in the
thermistor circuit.
Check continuity of pattern
and lead wires according to
the P.W.B. and schematic
diagrams.
Check continuity of pattern
and lead wires according to
the P.W.B. and schematic
diagrams.