Troubleshooting (Op: Schedule Timer); Malfunction Of Transmission Between Central Remote Controller And Indoor Unit - Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting (OP: Schedule Timer)

7. Troubleshooting (OP: Schedule Timer)

7.1 Malfunction of Transmission Between Central Remote Controller and Indoor
Unit
UE
Remote Controller
Display

„ Malfunction of transmission between central remote controller and indoor unit

Supposed Causes
„ 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
548
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Has
an indoor unit
YES
once connected been remove
or its address
changed?
NO
Is
the power supply
NO
turned on for indoor units
displaying
malfunction?
YES
Is
YES
transmission wiring
disconnected or wired
incorrectly?
NO
Is
transmission with all
NO
indoor units
malfunctioning?
YES
Is
the transmission
YES
wiring with the master
controller disconnected or
wired incorrectly?
NO
Is
the master controller's
YES
connector for setting master
controller
disconnected?
NO
Is the group
No. of malfunctioning indoor
units set?
YES
Troubleshooting UM Combination "MA1R Series" Using R-407C
PACD011001C2
Reset power supply
simultaneously for all optional
controllers for centralised 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.
(VF075)