Daikin FXYBP20K7V1, Service Manual

Page: 182 / 193

SiE 00-07 Troubleshooting (OP: Schedule Timer)
Troubleshooting R-407C PLUS Series 171
7. Troubleshooting (OP: Schedule Timer)
7.1 Malfunction of Transmission Between Central Remote Controller and Indoor
Unit
Remote Controller
Display
UE
Supposed Causes Malfunction of transmission between central remote controller and indoor unit
Disconnection of connector for setting master controller (or individual/combined switching connector)
Defect of schedule timer PC board
Defect of indoor unit PC board
Troubleshooting
(VF075)
Is
the power supply
turned on for indoor units
displaying
malfunction?
Is
transmission wiring
disconnected or wired
incorrectly?
Is
the transmission
wiring with the master
controller disconnected or
wired incorrectly?
Is
the master controller's
connector for setting master
controller
disconnected?
Set the group No. correctly.
Replace indoor unit PC board.
Fix the wiring correctly.
Fix the wiring correctly.
Connect the connector correctly.
Replace the central PC board.
Reset power supply
simultaneously for all optional
controllers for centralized control.
NO
YES
NO
YES
YES
NO
NO
Turn indoor unit's power supply.
YES
NO
NO
YES
YES
YES
NO
Has
an indoor unit
once connected been remove
or its address
changed?
Is the group
No. of malfunctioning indoor
units set?
Is
transmission with all
indoor units
malfunctioning?