Daikin VRV II RXYQ5MATL, Service Manual, Page: 252 / 331

Si39-504 Troubleshooting (OP: Schedule Timer)
Troubleshooting 241
5.3
“
M8
”
Malfunction of Transmission Between Optional
Controllers for Centralized Control
Remote
Controller
Display
M8
Applicable
Models Schedule timer
Method of
Malfunction
Detection Detect the malfunction according to DIII-NET transmission data. (The system will be
automatically reset.)
Malfunction
Decision
Conditions When no master controller is present at the time of the startup of slave controller.
When the optional controllers for centralized control which was connected once, shows no
response.
Supposed
Causes
„
Malfunction of transmission between optional controllers for centralized control
„
Defect of PC board of optional controllers for centralized control
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2838)
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.
NO
NO
Fix the wiring correctly.
YES
YES
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" ?