Hitachi FSXN Series Service Manual page 219

8 Troubleshooting
3A
Alarm code
• The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
• The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when the total capacity of the outdoor unit connected to the transmission terminal of the O.U.
- O.U. exceeds 54 HP.
Has PCB1 of outdoor unit
A, B or C been replaced?
No
Is the operating line between
outdoor unit and outdoor unit
connected correctly?
Yes
Abnormality of
outdoor unit total capacity
(Sub): Secondary unit(s).
213
SMGB0065 rev. 1 - 12/2010
Abnormal outdoor unit capacity.
Yes
No
Outdoor Unit
Unit A
(Main)
PCB1: Control PCB in Outdoor Unit
O.U. Outdoor Unit
Set the DSW2 of the
replaced PCB1 correctly.
Set the DSW6 of the
replaced PCB1 correctly.
Unit B Unit C
(Sub) (Sub)
8