Hitachi RPI-0.8FSG1 Service Manual page 77

Alarm
Code
G "RUN" light flickers and "ALARM" is indicated on the remote control switch.
G The unit No., alarm code and the unit code is alternately indicated on the set temperature section,
and the unit No. and alarm code are indicated on the display of the outdoor unit PCB.
# This alarm code is indicated when the current transformer is abnormal (0A detection) and its state
occurs more than 3 times in 30 minutes.
Condition of Activation: When the frequency of compressor is maintained at 15 to 18Hz after compressor
Restart operation.
How is compressor
operation when
restarted?
*1): P17 is shown at 7-segment on the outdoor unit PCB.
*2): Perform the high voltage discharge work by referring to 1.3.6 before checking and replacing the inverter parts.
Abnormality of Current Transformer (0A Detection) (For 5HP to 20HP)
is started, one of the absolute value of running current at each phase
U+, U-, V+ and V- is less than 0.5A (including 0.5A).
Compressor stops
immediately. (nearly 18Hz)
Compressor is not
operated.
P17 is appeared. *1)
Is the coil resistance
of comp. normal?
Is output of transistor
module correct? *2)
Replace PCB3
No
Yes
No
Yes
TROUBLESHOOTING
Power wiring of Comp.
is not through CT.
Pass the wires through CT.
Faulty PCB3 and
Replace PCB3 *2)
Replace Comp.
Check transistor module.
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