U8" Malfunction Of Transmission Between; Main And Sub Remote Controllers - Daikin FCQ18PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
U8
3.40 " " Malfunction of Transmission between Main and
Sub 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 the microcomputer if
Malfunction signal 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 P.C.B.
Troubleshooting
137
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Using 2-remote
controllers control.
YES
SS1
of both remote controllers is
set to "SUB."
YES
SS1
NO
of remote controller P.C.B.s
is set to "MAIN."
YES
NO
SiUS28-902_a
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 P.C.B.
Set one remote controller to
"MAIN"; the power supply off
once and then back on.
Troubleshooting