Hitachi RAS-18FSXN - Abnormal Transmission between the Remote Control Switch and the Indoor Unit

Failure of Remote Control Switch
Check it by
self-checking mode *1).
Check it by
self-checking mode *2).
Replace remote
control switch if failed.
Check connectors.
Correctly connect
wires.
Replace PCB if failed.
Take action according to the procedure
indicated in "TEST RUN".
Incorrect Wiring Connection
Unconnected Wires
to PCB
Failure of PCB
Failure of PCB
*1): Refer to: Self-checking of the remote control switch, see on page 265.
*2): Refer to: Self-checking of PCB using the remote control, see on page 262.
8.1.6 Abnormal transmission between the remote control switch and the indoor unit
•
The RUN indicator on the remote control:
Flashes every two seconds.
Cause Check Item
Action
(Turn OFF Main Switch)
Check cable and
connections.
Repair cable or
connect it.
Phenomenon
Disconnection or Insufficient Contacting of
Remote Control Cable
Check wiring and
connections.
Repairing
Incorrect Wiring Connection
(Incorrect Polarity)
Failure of Remote Control Switch
Check it by
self-checking mode *1).
Check it by
self-checking mode *2).
Replace it if remote
control switch is faulty.
Check connectors.
Correctly connect
wires.
Replace PCB if failed.
Disconnected Wire
to PCB
Failure of PCB
(in Indoor Unit
and Remote
Control Switch)
Failure of PCB
*1): Refer to: Self-checking of the remote control switch, see on page 265.
*2): Refer to: Self-checking of PCB using the remote control, see on page 262.
8 Troubleshooting
159
SMGB0065 rev. 1 - 12/2010
8