MULTI TYPE

Check code Check code name
Cause
[E23] / [15]
(AI-NET)
Communication signal sending
error between outdoor units
1. Inter-unit wire connection error between outdoor units
2. Communication connector connection error
between outdoor units, I/F P.C. board error
3. End terminal resistance setup error between
outdoor units
Is there no
miswiring or disconnection
on communication line
between outdoor
units?
No
Yes
Correct communication line.
Is connection
of CN03 connector on
outdoor I/F P.C. board
normal?
No
Correct wiring or connector.
Yes
Is not main power of
outdoor unit turned
off?
Yes
Turn on main power of
outdoor unit.
No
Is the end
terminal resistance between
outdoor units turned on?
(SW30 Bit 1)
No
Turn the end terminal
resistance to ON.
Yes
Did power failure
occur?
Yes
Clear check code.
No
Is there no noise
source, etc?
Yes
Check and eliminate noise,
etc
No
Check outdoor I/F P.C. board.
Defect ➝ Replace
Check code Check code name
Cause
[E19] / [96]
(AI-NET)
Header outdoor unit quantity error 1. Misconnection of inter-unit wire between indoor and
outdoor
2. Outdoor I/F P.C. board error
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?
Yes
Connect communication line
between indoor and outdoor
to one unit per 1 system.
No
Is
communication
line between indoor and
outdoor connected to
one unit per 1
system?
No
Connect communication line
between indoor and outdoor.
Yes
Check I/F board.
Reference)
The outdoor unit connected with communication wires (U1, U2) between
indoor and outdoor is automatically recognized as the header unit.
Check code Check code name
Cause
[E20] / [42]
(AI-NET)
Unit connected to other line
during automatic address
When starting automatic indoor address, a device in
another line is connected.
Sub-code: 01: Connection of an outdoor unit in another line 02: Connection of an indoor unit in another line
Separate the connection between the lines following the address setup method.
199