Signal Transmission Error (Between Main Remote Controller And Sub Remote Controller) - Daikin 2MXS40H2V1B Service Manual

SiBE121123_A
6.8 Signal Transmission Error (between MAIN Remote
Controller and SUB Remote Controller)
U8
Error Code
Method of Error In case of controlling with 2 remote controllers, check the system using microcomputer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Detection
Error Decision Normal transmission does not continue for specified period.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Remote controller is set to "SUB" when using 1 remote controller
Connection of 2 sub remote controllers (when using 2 remote controllers)
Defective remote controller PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
NO
Using 2 remote
controllers?
YES
Is SS1 of both
NO
remote controllers
set to "SUB"?
YES
Troubleshooting for SA Indoor Unit
Is SS1
NO
of remote
controller PCB set to
"SUB"?
YES
Set SS1 to "MAIN"; turn 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
PCB.
Set one remote controller to
"MAIN"; turn the power supply
off once and then back on.
(R15321)
176