Hitachi RPI-1.0FSG1 - Page 67

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TROUBLESHOOTING
 “RUN” light flickers and “ALARM” is indicated on the remote control switch.
 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 capacity setting dip switch, DSW2 on the outdoor unit PCB1,
is not set (all the settings from #1 to #3 are OFF) or mis setting.
 This alarm code is indicated when the total indoor unit capacity is smaller than 50% or greater than
150% of the combined outdoor unit capacity.
Alarm
Code
Incorrect Capacity Setting or Combined Capacity
between Indoor Units and Outdoor Unit
Are #1-#3 of DSW2 on
the outdoor unit PCB1
set correctly?
Are the setting of
DSW1 on the outdoor
unit PCB1 and the setting
of DSW5 on the indoor
unit PCB totally same in
a refrigerant cycle?
Total capacity of the
indoor units is wrong.
Set the capacity for PCB1.
No
Yes
Yes
Yes
Are #1-#4 of DSW3 on
the indoor unit PCB set
correctly?
Set the capacity for PCB.
No
Set them correctly.
No
Cause
Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Check combination
of indoor units and
capacity setting on PCB.
Correctly set dip switch,
DSW3.
Incorrect Capacity Setting of Indoor Unit
Check outdoor unit
model by calculating
total indoor units
capacity.
Ensure that total
indoor unit capacity is
from50% to 130%.
Total Indoor Unit Capacity Connected to the
Outdoor Unit is Beyond Permissible Range
Check refrigeration
cycle setting on
outdoor unit PCB and
indoor unit PCB.
Set them correctly.
Refrigeration Cycle Setting of Outdoor Unit
and Indoor Unit is Different
Check capacity setting
on outdoor unit PCB.
Correctly set dip switch,
DSW2.
Incorrect Capacity Setting of Outdoor Unit
 In case of 16 or less of total indoor unit, set the dip switch DSW1
of outdoor unit PCB1 and DSW5 of indoor unit PCB correctly.
 In case of 17 or more of total indoor unit, set DSW5 of indoor unit
PCB at {(DSW1 of outdoor unit PCB1)+1}.
Combination
Total Q'ty
Total Capacity
(HP)
RAS-5FSG(3) 2-8 sets *1) 2.5-6.5
*1):
RAS-8FSG(3), RAS-8FXG(3) 4.0-10.4
RAS-10FSG(3), RAS-10FXG(3) 5.0-13.0
RAS-16FSG, RAS-16FS3 2-13 (16) sets *2) 8.0-20.8 *2):
RAS-20FSG, RAS-20FS3 2-16 sets 10.0-26.0
RAS-24FSG1, RAS-24FS5 2-27 sets 12.0-31.2
RAS-30FSG1, RAS-30FS5 2-30 sets 15.0-39.0
In case of changing the indoor
unit capacity from 1.0HP or 1.5HP
to 1.3HP by dip switch setting.
Outdoor Unit Model
Combined Indoor Unit
Notes
2-12 sets
If the capacity of one indoor unit
is the same as of the outdoor
unit, the system can be operated.