Panasonic CU-8ME1XPK - Troubleshooting (OP: Schedule Timer); Malfunction of Transmission between Central Remote Controller and Indoor Unit

Troubleshooting (OP: Schedule Timer) PACD011001C2
548 Troubleshooting UM Combination “MA1R Series” Using R-407C
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 centralised 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?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.