M8" Malfunction Of Transmission Between Optional; Controllers For Centralized Control - Daikin RXYQ5-48MAY1 Service Manual

Troubleshooting (OP: Schedule Timer)
" M8 "
5.3 Malfunction of Transmission Between Optional

Controllers for Centralized Control

M8
Remote
Controller
Display
Applicable All models of indoor units, schedule timer
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
254
Malfunction of transmission between optional controllers for centralized control
Defect of PC board of optional controllers for centralized control
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Has a
once connected
optional controller for
centralized control been
disconnected or
its address
changed?
NO
Is
the power supply
turned on for all optional
controllers for
centralized
control?
YES
Is
the reset switch
of all optional controllers
for centralized control
set to "normal" ?
YES
Is
transmission wiring
disconnected or wired
incorrectly?
YES
YES
NO
NO
NO
Si39-407
Reset power supply
simultaneously for all optional

controllers for centralized control.

Turn on power supply for all
optional controllers for centralized
control.
Set reset switch to "normal."
Fix the wiring correctly.
The PC board of one of the
optional controllers for centralized
control is defective. Try turning
on/off using each optional
controllers for centralized control,
and replace the PC board of the
one that is unable to control the
indoor unit.
(V2838)
Troubleshooting