Hitachi RAS-18FSXN - Page 196

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