Hitachi RPI-0.8FSG1 Service Manual page 66

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 there are more than two (2) CH units connected between outdoor
unit and indoor unit due to incorrect wiring connection.
# This alarm code is indicated when the outdoor unit PCB (PCB1) for FSG/FS3 series is attached
incorrectly to the FXG/FX3 series outdoor unit.
Is wiring connection
correct?
Yes
Is PCB1 for FXG/FX3
series?
Yes
Fault PCB for CH Unit
Correct Wiring
Outdoor Unit
No. 1, 2
of TB2
CH Unit
No. 3, 4
of TB2
Indoor
Unit
1-56
Incorrect Wiring Connection (FX Series Only)
No
Outdoor Unit PCB is correct.
No
Outdoor Unit PCB is for FSG/FS3 series.
Incorrect Wiring
No. 1, 2
of TB2
CH Unit
No. 3, 4
of TB2
Indoor
Unit
Incorrect Example;
Two (2) CH units between
Outdoor Unit
outdoor unit and indoor unit
No. 1, 2
of TB2
CH Unit
No. 3, 4
of TB2
Indoor
Unit
Correct the wiring connection
and start the unit again.
Replace the PCB1 with the
one for FXG/FX3 series and
start the unit again.
No. 1, 2
of TB2
CH Unit
No. 3, 4
of TB2
Indoor
Unit