Check code
Location
of
detection
Description
System status
Check code
detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
E18 –
–
Indoor
unit
Trouble
in
communication
between indoor
header and
follower units
Stop of
corresponding
unit
Periodic communication
between indoor header and
follower units cannot be
maintained.
• Check remote controller
wiring.
• Check indoor power supply
wiring.
• Check P.C. boards of
indoor units.
E19 E19
00:
No
outdoor
unit
I/F
Trouble
in
number
of
outdoor unit
All stop
There is no outdoor
unit in
one line.
• Check connection of
indoor-outdoor
communication line.
• Check for
trouble
in outdoor
P.
C. board (I/F).
E20 E20
01:
Connection of outdoor unit
from other line
02:
Connection of indoor unit
from other line
I/F
Connection to
other line found
during
automatic
address setting
All stop
Equipment from other line is
found to have been
connected when indoor
automatic address setting is
in progress.
Disconnect inter-line tie cable
in accordance with automatic
address setting method
explained in “Address
setting” section.
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