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

PACD011001C2 Troubleshooting (OP: Central Remote Controller)
Troubleshooting UM Combination “MA1R Series” Using R-407C 543
6. Troubleshooting (OP: Central Remote Controller)
6.1 Malfunction of Transmission Between Central Remote Controller and Indoor
Unit
Remote Controller
Display
UE
Supposed Causes
„
Malfunction of transmission between optional controllers for centralised 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
Troubleshooting
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.
YES
NO
NO
NO
NO
YES
YES
Turn indoor unit's power supply.
YES
YES
YES
YES
NO
NO
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?
(V1896)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.