Hitachi RWM-(H)FSN3E, Service Manual

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12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
365
12
Alarm code
31
Incorrect capacity setting or combined capacity between indoor units and outdoor unit
• The RUN LED flickers and “ALARM” is displayed on the remote control switch.
•
The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit
number and the alarm code are displayed 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.
Outdoor unit capacity setting is not correct.
Is DSW3 on the outdoor unit
PCB1 set correctly?
Set the capacity for PCB1.
No
Yes
Is DSW3 on the outdoor unit
PCB set correctly?
Set the capacity for PCB.
No
Yes
Total capacity of the indoor
unit(s) is wrong.
Phenomenon Cause Check item
Action
(Turn OFF the main switch)
Incorrect capacity setting of indoor unit
Check combination of
indoor units and capa-
city setting on PCB.
Correctly set
dip switch, DSW3.
Incorrect capacity setting of outdoor unit
Check capacity setting
on outdoor unit PCB.
Correctly set
dip switch, DSW3.
N O T E S
• In case of H-LINK system, this alarm code is indicated when the refrigerant system setting on the outdoor
unit PCB and indoor unit PCB are incorrectly set.
• In this case, set correctly refering to the section Setting of DIP switches and RSW switches after turning OFF
main switch.