Header Outdoor Units Quantity Error; Unit Connected To Other Line During Automatic Address - Toshiba Super MMU-AP0091H Service Manual

Check code
[E19] / [96]
(d07 / AI-NET)
Sub-code: 00: No header unit 02: Two or more header units
Are not communication lines (U1, U2)
between indoor and outdoor connected
to multiple outdoor units?
NO
Is communication line between indoor and
outdoor connected to one unit per 1 system?
YES
Check I/F board.
Check code
[E20] / [42]
(d07 / AI-NET)
Sub-code: 01: Connection of outdoor in other line 02: Connection of indoor unit in other line
Separate the wire between lines according to address setup method.
Check code name

Header outdoor units quantity error

YES
NO
Reference)
An outdoor unit connected with communication wires (U1, U2)
between indoor and outdoor is the header unit.
Check code name
Unit connected to other line
during automatic address
1. Misconnection of inter-unit cable between
indoor and outdoor
2. Outdoor I/F P.C. board error
Connect communication line between indoor
and outdoor to one unit per 1 system.
Connect communication line between indoor
and outdoor.
When starting automatic indoor address, a
device in other line is connected.
159
Cause of operation
Cause of operation