U8" Malfunction Of Transmission Between Master And Slave Remote Controllers; U8" Malfunction Of Transmission Between Master And Slave Remote Con - Daikin R-410A Service Manual

SiBE39-402A
4.40 "U8" Malfunction of Transmission between Master and
Slave Remote Controllers
U8
Remote
Controller
Display
Applicable
AII indoor unit models
Models
Method of In case of controlling with 2-remote controller, check the system using microcomputer if signal
Malfunction transmission between indoor unit and remote controller (main and sub) is normal.
Detection
Malfunction
Normal transmission does not continue for specified period.
Decision
Conditions
! Malfunction of transmission between main and sub remote controller
Supposed
! Connection between sub remote controllers
Causes
! Defect of remote controller PC board
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Using 2-remote
controllers control.
YES
SS1 of both remote
controllers is set to
"SUB."
YES
Troubleshooting by Indication on the Remote Controller
SS1 of remote
NO
controller PC boards is
set to "MAIN."
YES
NO
NO
Set SS1 to "MAIN"; the
power supply off once and
then back on.
Turn the power off and then
back on. If a malfunction
occurs, replace the remote
controller PC board.
Set one remote controller to
"MAIN"; the power supply off
once and then back on.
(V2825)
157