Hitachi RPI-0.8FSG1 Service Manual page 68

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 on the remote control switch of other indoor unit when no transmitting
data is issued from a malfunctioning indoor unit for more than 60 minutes after receiving transmitting
data from the indoor unit.
Is there any indoor
unit with indication
of alarm code "03"?
No
Is there any indoor
unit whose lamp is not
lit or whose LCD is not
indicated at the remote
control switch?
Yes
Check the power source,
fuse and transformer of
the indoor unit or CH unit.
Phenomenon
Abnormal
Transmitting
from Other Units
*1): This abnormality is indicated on an indoor unit which is normal, since this is due to abnormality of transmitting of
the indoor units or power source abnormality in the same refrigeration cycle and electrical system. If the power
source is abnormal, abnormality can not be indicated by its indoor unit, so, this alarm is indicated on the remote
control switch of other indoor unit.
1-58
Abnormality in Transmitting of Other Indoor Units
Yes
Is the connector CN2
on PCB of indoor unit
loose?
Is LED3 (yellow)
flickering on the PCB
of indoor unit?
Is LED3 OFF?
Is still LED3 ON?
Faulty indoor unit PCB.
Cause
Abnormal Transmitting
Indoor Unit Outdoor Unit
Outdoor Unit Indoor Unit
Incorrect Power Supply
(to Indoor Unit or CH Unit) *1)
Faulty Indoor Unit PCB
or CH Unit PCB
Yes
Plug the connector CN2
properly and restart operation.
No
Yes
No
Yes
No
Yes
Check Item
Check indoor unit
showing alarm code
"03".
Check indoor unit
showing no light ON on
remote control switch.
If all indoor unit show
alarm code 32, check
PCB by self-checking
mode for all indoor unit
or CH unit.
Check the wires between
the indoor unit, CH unit and
outdoor unit.
Check connections of the
PCB of indoor unit, CH unit
or connector CN1.
Action
(Turn OFF Main Switch)
Take action according
to pages 1-28 to 34.
Take action according
to pages 1-13 to 14.
Replace PCB if faulty.