Abnormal Transmission Between Remote Control Switch And Indoor Unit - Hitachi UTOPIA RAS-4HVRP2E Service Manual

10 Troubleshooting
Initial troubleshooting

10.1.2.4 Abnormal transmission between remote control switch and indoor unit

• The RUN indicator on the remote control: Flashes every two seconds.
Phenomenon
Disconnection or contact failure of controller cable
Failure of wired controller
Failure of PCB (in
Indoor unit and wired
controller)
?
N O T E
• (*): Refer to the item "10.4.2 RSW, DSWs and LEDs functions RAS-(4-6)HV(R/N)(C/P)2E"
RAS-(4-6)H(R/N)(C/P)2E" in these chapters.
222 SMGB0136 rev.0 - 07/2021
Cause
Disconnected Wires to
PCB
Failure of PCB
Check Item
Check cables and
connection
Check it in self-checking
mode
Check connectors
Check it in indoor / outdoor
unit PCB check mode (*)
or "10.4.3 RSW, DSWs and LEDs functions
Action (Turn OFF
Main Switch)
Replace or repair them
Replace it if faulty
Correctly connect wires
Replace PCB if faulty