Transmission Error Between Main Remote Controller And Sub Remote Controller - Daikin RZQ Series FCQ20EVA Service Manual

Troubleshooting by Remote Controller
4.42 Transmission Error between MAIN Remote Controller
and SUB Remote Controller
U8
Error Code
Applicable All indoor models
Models
Method of Error In case of controlling with 2 remote controllers, check the system using micro-computer if signal
Detection transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision
The error is generated when, in case of controlling with 2 remote controllers, the micro-
Conditions 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.
 Transmission error between MAIN remote controller and SUB remote controller
Supposed
 Connection among SUB remote controllers
Causes
 Defective remote controller PCB
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Controlling with 2-remote
controller
YES
Both SS-1
switches on remote
controllers are turned
to SUB.
YES
147
SS-1 switch
NO
on remote controller PCB is
turned to MAIN.
YES
Is there
NO
continuity in remote controller
wiring?
NO
NO
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply, and
restart operation.
YES
Turn OFF the power once and
restart operation.
Replace the remote controller
PCB if any error is generated.
Replace the remote controller
wiring.
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply, and
restart operation.
SiME281501E
Service Diagnosis