M8" Malfunction Of Transmission Between; Optional Controllers For Centralized Control - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
M8
4.3 " " Malfunction of Transmission between Optional
Controllers for Centralized Control
M8
Remote
Controller
Display
Applicable Centralized remote controller
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
 Malfunction of transmission between optional controllers for centralized control
Supposed
 Defect of P.C.B. of optional controllers for centralized control
Causes
Troubleshooting
Troubleshooting
Troubleshooting by Indication on the Centralized Remote Controller
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Has a once
connected optional
YES
controller for 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
NO
of all optional controllers
for centralized control set
to ''normal?''
YES
Is
transmission wiring
YES
disconnected or wired
incorrectly?
NO
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 P.C.B. 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
P.C.B. of the one that is unable to
control the indoor unit.
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