Outdoor Capacity Unset; Duplicated Central Control Addresses; Quantity Over Of Connected Outdoor Units - Toshiba Super MMU-AP0091H Service Manual

Check code name
[L10] / [88]
(d07 / AI-NET)
I/F P.C. board A'ssy service for the outdoor unit is common to this series. A setup for model selection different from
that for P .C. board with trouble is necessary. Set up a model based upon the P .C. board A'ssy exchange procedure.
Check code name
[L20] / [98]
(d07 / AI-NET)
Are not two or more
central control system identical
network addresses connected?
NO
Check the network adaptor
on the indoor P.C. board.
Check code name
[L28] / [46]
(d07 / AI-NET)
Is the number of the connected
outdoor units 4 or less?
YES
Is the communication line between
outdoor units correctly connected?
YES
Check I/F P.C. board.
Check code name

Outdoor capacity unset

Check code name
Duplicated central
control addresses
YES
Check code name
Quantity over of
connected outdoor units
NO
NO
185
Cause of operation
On the outdoor IF P.C. board for service, the
model selecting jumper has not been set up so
as to match with the model.
Cause of operation
Central control addresses are duplicated.
Correct the network address
of the central control system.
Cause of operation

1. Quantity over of connected outdoor units.

2. Connection error of communication line
between outdoor units
3. Outdoor I/F P.C. board error
Max. 4 outdoor units are
connectable for one system.
Correct connection of
the communication line.