Abnormal Transmission Between Remote Control Switch And Indoor Unit - Hitachi RPI-0.8FSG1 Service Manual

TROUBLESHOOTING
(1.1.5 Failure of Power Supply to Indoor Unit and Remote Control Switch)
Failure of Remote Control Switch
Failure of PCB
Incorrect Wiring Connection
*1): Refer to Item 1.3.2.
*2): Refer to Item 1.3.1.

1.1.6 Abnormal Transmission between Remote Control Switch and Indoor Unit

G "RUN" Lamp on Remote Control Switch:
Flickering every 2 seconds
Phenomenon
Disconnection or Insufficient Contacting of
Remote Control Cable
Incorrect Wiring Connection
(Incorrect Polarity)
Failure of Remote Control Switch
Failure of PCB
(in Indoor Unit
and Remote
Control Switch)
*1): Refer to Item 1.3.2.
*2): Refer to Item 1.3.1.
*3): This phenomenon occurs when the system is newly installed and is started within 5 minutes after power supply,
since automatic setting of unit No. is performed during this period.
1-14
Unconnected Wires
to PCB
Failure of PCB
Cause
Disconnected Wire
to PCB
Failure of PCB
Check it by
self-checking mode *1).
Check connectors.
Check it by
self-checking mode *2).
Take action according to the procedure
indicated in "TEST RUN".
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).
Replace remote
control switch if failed.
Correctly connect
wires.
Replace PCB if failed.
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.