– 197 –
Sub-code: 00: No header unit 02: Two or more header units
No
Yes
Yes
No
[E19]
[E20]
Sub-code: 01: Connection of an outdoor unit in another line 02: Connection of an indoor unit in another line
No
Yes
No
No
Yes
Yes
Yes
No
No
Yes
No
Yes
[E23]
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Check code name
Header outdoor unit quantity error
1. Misconnection of inter-unit wire between indoor and
outdoor
2. Outdoor I/F P.C. board error
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
Unit connected to other line
during automatic address
When starting automatic indoor address, a device in
another line is connected.
Are not
communication lines
(U1, U2) between indoor
and outdoor connected
to multiple outdoor
units?
Is
communication
line between indoor and
outdoor connected to
one unit per 1
system?
Is connection
of CN03 connector on
outdoor I/F P.C. board
normal?
Is not main power of
outdoor unit turned
off?
Did power failure
occur?
Is there no noise
source, etc?
Is the end
terminal resistance between
outdoor units turned on?
(SW30 Bit 1)
Is there no
miswiring or disconnection
on communication line
between outdoor
units?
Connect communication line
between indoor and outdoor
to one unit per 1 system.
Correct communication line.
Correct wiring or connector.
Turn on main power of
outdoor unit.
Turn the end terminal
resistance to ON.
Clear check code.
Check and eliminate noise,
etc
Check outdoor I/F P.C. board.
Defect
Replace
Connect communication line
between indoor and outdoor.
Reference)
The outdoor unit connected with communication wires (U1, U2) between
indoor and outdoor is automatically recognized as the header unit.
Check I/F board.
Separate the connection between the lines following the address setup method.
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