Hitachi RPI-0.8FSG1 Service Manual page 46

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 main power source phase is reversely connected or one
phase is not connected.
Single Phase
(Is there any phase not connected?)
Reverse Phase Connection?
Is there any excessively voltage
decrease at power source?
Voltage for unit to
be suspended.
Phenomenon
Activation of
Reverse Phase
Sensor in
Outdoor Unit
1-36
Abnormality of Picking up Phase Signal
Yes
PCB1 is normal
No
Yes
PCB1 is normal
No
Yes
PCB1 is normal
No
Running Voltage:
"B" V
Starting Voltage:
Less than "A" V
Cause
Reverse or Single Phase
Faulty Outdoor Unit PCB
Correctly connect each phase
of power source.
Correctly connect each phase
of power source.
Abnormality with Power Source.
Faulty PCB1 or other cause.
Refer to next page.
NOTE:
PCB1: Outdoor Unit Printed Circuit Board
Power Supply "A"
380-415V, 50Hz
323
380V, 60Hz
220V, 60Hz 187
Check Item
Check it according to
electrical wiring in Page
1-6, 1-7 and 1-9.
"B"
342 to 456
342 to 418
198 to 242
Action
(Turn OFF Main Switch)
Replacing Wires, Repair,
Tightening Screws or
Correct Wiring
Replace PCB if
faulty.