M8" Malfunction Of Transmission Between Optional Controllers For Centralized Control; M8" Malfunction Of Transmission Between Optional Controllers For Cen - Daikin R-410A Service Manual

SiBE39-402A
"M8" Malfunction of Transmission between Optional
7.3
Controllers for Centralized Control
M8
Remote
Controller
Display
Applicable
All models of indoor units, schedule timer
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
! Malfunction of transmission between optional controllers for centralized control
Supposed
! Defect of PC board of optional controllers for centralized control
Causes
Troubleshooting
Troubleshooting
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
YES
centralized control been
disconnected or
its address
changed?
NO
Is the
power supply
NO
turned on for all optional
controllers for
centralized
control?
YES
Is the
reset switch of all
NO
optional controllers for
centralized control set
to "normal" ?
YES
Is
transmission wiring
NO
disconnected or wired
incorrectly?
YES
Troubleshooting (OP: Schedule Timer)
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)
181