Abnormal Transmission Between The Remote Control Switch And The Indoor Unit - Hitachi FSXN Series Service Manual

8 Troubleshooting
Failure of Remote Control Switch
Unconnected Wires
to PCB
Failure of PCB
Failure of PCB
Incorrect Wiring Connection
*1): Refer to: Self-checking of the remote control
*2): Refer to: Self-checking of PCB using the remote

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