L15 Defective Pairing Of Indoor Units - Panasonic 2WAY Multi Technical & Service Manual

L15 Defective Pairing of Indoor Units

Error detection method
1) In the case of double-duct models
Detects defective combinations (type, capacity, group and unit count settings) in double-duct units.
Troubleshooting
1) In the case of double-duct models
No.
Another indoor unit is connected to the system to
1
which a double-duct unit is connected.
Another indoor unit is group-connected to the remote
2
controller group in the double-duct unit.
A defective setting exists in the remote control group
3 settings between the two built-in indoor units' control
boards.
The type or capacity settings differ between the two
3
built-in indoor units' control boards.
The remote control group wiring is severed or short-
4 circuited between the two built-in indoor units' control
boards.
One of the two built-in indoor units' control boards is
5
malfunctioning.
*1 It is necessary for only one indoor unit to be connected to the outdoor unit to which a double-duct model is
connected.
*2 A group has been established between the two indoor boards in the indoor unit, so groups cannot be set for
other indoor units.
Problem
IV–76
Recovery
Connect only one indoor unit to the system
Disconnect the other indoor unit from the group and
reset the group settings (item code 14 in the remote
controller's advanced settings)
Set one of the two boards to "1" (main) and the other
to "2" (sub) in the group settings (item code 14 in the
remote controller's advanced settings).
Set the type and capacity parameters to the same
setting for both indoor unit's control boards with the
remote controller's advanced settings.
Repair the wiring.
If there is no problem with the power supply, etc.,
replace the board.
*1
.
*2
.