1-67
TROUBLESHOOTING
“RUN” light flickers and “ALARM” is indicated on the remote control switch.
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
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).
Alarm
Code
Abnormality of Current Transformer (0A Detection) (For 5HP to 20HP)
Replace Comp.
Restart operation.
No
Power wiring of Comp.
is not through CT.
Pass the wires through CT.
Faulty PCB3 and
Replace PCB3 *2)
Compressor stops
immediately. (nearly 18Hz)
Compressor is not
operated.
P17 is appeared. *1)
How is compressor
operation when
restarted?
Is the coil resistance
of comp. normal?
Yes
Yes
Check transistor module.
Replace PCB3
No
Is output of transistor
module correct? *2)
*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.
