Hitachi Utopia RPI-2.5HRG Service Manual page 41

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 alarm code is indicated on the display of the outdoor unit PCB.
# This alarm code is indicated when the total indoor unit capacity is not equal to the combined
outdoor unit capacity.
Is DSW3 on the outdoor
unit PCB1 set correctly?
Is DSW3 on the indoor
unit PCB set correctly?
Total capacity of the
indoor unit(s) is wrong.
Phenomenon
Incorrect Capacity Setting of Indoor Unit
Incorrect Capacity Setting of Outdoor Unit
Total Indoor Unit Capacity Connected to the
Outdoor Unit is Beyond Permissible Range
NOTE:
In case of H-LINK system, this alarm code is indicated when DSW4 of outdoor unit PCB and DSW5 of
indoor unit PCB are incorrectly set.
In this case, set correctly DSW4 and DSW5 after turning off main switch.
1-38
Incorrect Capacity Setting or Combined Capacity
between Indoor Units and Outdoor Unit
No
Yes
No
Yes
Cause Check Item
Check combination
of indoor units and
capacity setting on PCB.
Check capacity setting
on outdoor unit PCB.
Check outdoor unit
model by calculating
total indoor units
capacity.
Set the capacity for PCB1.
Set the capacity for PCB.
Action
(Turn OFF Main Switch)
Correctly set dip switch,
DSW3.
Correctly set dip switch,
DSW3.
Ensure that total
indoor unit capacity
is 100%.