Troubleshooting (Op: Central Remote Controller); Ue" Malfunction Of Transmission Between Central; Remote Controller And Indoor Unit - Daikin RXYQ5-48MAY1 Service Manual

Si39-407
4.

Troubleshooting (OP: Central Remote Controller)

" UE "
4.1 Malfunction of Transmission Between Central

Remote Controller and Indoor Unit

UE
Remote
Controller
Display
Applicable All models of indoor units
Models RXYQ5MA~48MA
Method of Microcomputer checks if transmission between indoor unit and central remote controller is
normal.
Malfunction
Detection
Malfunction When transmission is not carried out normally for a certain amount of time
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Malfunction of transmission between optional controllers for centralized control and indoor unit
Connector for setting master controller is disconnected.
Failure of PC board for central remote controller
Defect of indoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Has
an indoor unit once
connected been remove
or its address
changed?
NO
Is the
power supply turned
on for indoor units displaying
malfunction?
YES
Is
transmission wiring
disconnected or wired
incorrectly?
YES
Is transmission
with all indoor units
malfunctioning?
YES
Is the
transmission wiring
with the master controller
disconnected or wired
incorrectly?
YES
Is the
master controller's
connector for setting
master controller
disconnected?
YES

Troubleshooting (OP: Central Remote Controller)

YES
NO
NO
Is the group
NO
No. of malfunctioning
indoor units set?
YES
NO
NO
Reset power supply
simultaneously for all optional
controllers for centralized
control.
Turn indoor unit's power
supply.
Fix the wiring correctly.
NO
Set the group No. correctly.
Replace indoor unit PC
board.
Fix the wiring correctly.
Connect the connector
correctly.
Replace the central PC board.
(V2832)
245