Daikin RZQG71L9V1, Service Manual

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ESIE15-13C Troubleshooting by Remote Controller
Service Diagnosis 177
4.36 Transmission Error between MAIN Remote Controller
and SUB Remote Controller
Remote
Controller
Display
U8
Applicable
Models
All models of indoor units
Method of Error
Detection
In case of controlling with 2- remote controller, check the system using micro-computer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision
Conditions
The error is generated when, in case of controlling with 2 remote controllers, the micro-
processor detects that the transmission between the indoor unit and the remote controllers
(MAIN and SUB) is not normal over a certain amount of time.
Supposed
Causes
 Setting failure with remote controller

Connection among SUB remote controllers

Defective remote controller PCB
 Disconnection of remote controller wiring
Troubleshooting
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply, and
restart operation.
NO
NO
NO
YES
Turn OFF the power once and
restart operation.
Replace the remote controller
PCB if any error is generated.
Replace the remote controller
wiring.
NO
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
YES YES
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply, and
restart operation.
YES
Controlling with
2-remote controller
Both SS-1
switches on remote controllers
are turned to SUB
SS-1 switch
on remote controller PCB is
turned to MAIN
Is there
continuity in remote controller
wiring?