Hitachi UTOPIA RAS-4HVRP2E - Abnormal Transmission between Remote Control Switch and Indoor Unit

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