Hitachi RPI-0.8FSG1 Service Manual page 75

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 compressor is operated under the conditions lower than
0.6MPa (6kgf/cm 2
Discharge
Pressure
Is the amount of refrigerant
correct?
Yes
Connect pressure gauge
at the check joint of the
compressor discharge pipe.
Is the high-pressure in the
alarm area?
No
Is the connector CN7 of
outdoor unit PCB1 loose?
No
Is the high-pressure sensor
pipe clogged?
No
Is voltage between #1 and #3 of
the connector CN7 of outdoor unit
PCB1 12V, and voltage between
#2 and #3 in the alarm area?
No
Activation to Protect System from Excessively Low Discharge Pressure
(for Protection of Refrigerant Shortage)
G) for an hour.
(MPa)
0.3
0.1
0
Outdoor Air Temperature (
No
Yes
Yes
Yes
Yes
(V)
0.9
Voltage between
#2 and #3 of CN7
Alarm area
0.6
26
o
C)
Correctly charge refrigerant.
Check for leakage of refrigerant.
Plug the connector CN7 correctly.
Remove clogging.
Replace the high-pressure sensor.
Check the outdoor unit PCB1 by
self-checking. Replace it if faulty.
TROUBLESHOOTING
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