Daikin R407C PLUS - Malfunction of Transmission between Optional Controllers for Centralized Control

Si33-105 Troubleshooting (OP: Schedule Timer)
Troubleshooting R407C PLUS Series Heat Recovery System 211
7.3 Malfunction of Transmission Between Optional
Controllers for Centralized Control
Remote
Controller
Display
M8
Supposed
Causes
!
Malfunction of transmission between optional controllers for centralized control
!
Defect of PC board of optional controllers for centralized control
Troubleshooting
(VF076)
Is
transmission wiring
disconnected or wired
incorrectly?
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.
YES
NO
Fix the wiring correctly.
YES
NO
Has a
once connected
optional controller for
centralized control been
disconnected or
its address
changed?
Turn on power supply for all
optional controllers for centralized
control.
Reset power supply
simultaneously for all optional
controllers for centralized control.
YES
NO
Is
the power supply
turned on for all optional
controllers for centralized
control?
Set reset switch to "normal".
YES
NO
Is
the reset switch
of all optional controllers for
centralized control
set to "normal" ?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.