Hitachi RPI-0.8FSG1 Service Manual page 70

TROUBLESHOOTING
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 following conditions occurs;
• The running current of the constant compressor exceeds the value of overcurrent limitation during
operating.
• The running current of the constant compressor is detected 0A and retry when 3 minutes are
passed after all compressors are stopped, and this phenomenon occurs three times within
30 minutes.
Does the CMC2~4
turn ON?
Yes
Does the constant
compressor operate?
Yes
Is the running
current indicated on
7-Segment of PCB1
at check mode?
Yes
Check constant compressor and
current transformer.
Remove the cause after checking.
1-60
Abnormality of Running Current at Constant Compressor
No
No
Is the connector
No
CN4~6 of current
transformer correctly
connected?
No
Yes
Indication of 7-Segment
Abnormality of Constant Compressor
MC2
MC3
MC4
Check wiring connection
around PCB1.
Check fuses and wiring
between CMC2~4 and
constant compressor.
Connect it correctly.