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

1.1.6

ABNORMAL TRANSMISSION BETWEEN REMOTE CONTROL SWITCH AND INDOOR UNIT

n "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.
Cause
Disconnected Wire to PCB
Failure of PCB
TROUBLESHOOTING
Check Item
Check cable and
connections
Check wiring and
connections
Check it by self-check
mode *1)
Check connectors
Check it by self-check
mode *2)
1
9
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