Hitachi FSXN Series Service Manual page 196

8 Troubleshooting
0A
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.
Is operating line between outdoor
unit A and outdoor unit B connected
to H-LINK transmission terminal?
No
Is operating line between outdoor
unit A and outdoor unit C connected
to H-LINK transmission terminal?
No
Is operating line between outdoor
unit and outdoor unit connected
INCORRECTLY?
No
Abnormality of PCB1 in
outdoor unit A
(Sub): Secondary unit(s).
190
SMGB0065 rev. 1 - 12/2010
Abnormal transmission between outdoor units.
Yes
Yes
Yes
Outdoor Unit
Unit A
(Main)
PCB1: Control PCB in Outdoor Unit
O.U.: Outdoor Unit
Connect operating line between
outdoor unit A and outdoor unit B
to O.U.~O.U. transmission terminal.
Also, reset the power supply.
Connect operating line between
outdoor unit A and outdoor unit C
to O.U.~O.U. transmission terminal.
Also, reset the power supply.
Correctly connect wiring between
outdoor unit and outdoor unit and
reset the power supply.
Unit B Unit C
(Sub) (Sub)