–
67
–
E18
Indoor
unit
Error 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
E20
E23
E25
E26
E28
00:
No header unit
02:
Two or more
header units
I/F
Error in number
of outdoor
header units
All stop
There is more than one
outdoor header unit in one
line.
There is no outdoor header
unit in one line.
Outdoor header unit is
outdoor unit to which indoor
outdoortie cable (U1,U2) is
connected.
Check connection of
indoor-outdoor
communication line.
Check for defect in outdoor
P.C. board (I/F).
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 gAddress
setting h section.
E23
I/F
Outdooroutdoor
communication
transmission
error
All stop
Signal cannot be transmitted
to other outdoor units for at
least 30 seconds
continuously.
Check power supply to
outdoor units. (Is power
turned on?)
Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
Check communication
connectors on outdoor
P.C. boards.
Check for defect in outdoor
P.C. board (I/F).
Check termination
resistance setting for
communication between
outdoor units.
E25
I/F
Duplicated
follower outdoor
address
All stop
There is duplication in
outdoor addresses set
manually.
Note:
Do not set outdoor
addresses manually.
E26
Address of
outdoor unit
from which
signal is not
received
normally
I/F
Dropping out of
outdoor unit
All stop
Outdoor unit initially
communicating normally fails
to return signal for specified
length of time.
Backup setting is being
used for outdoor units.
Check power supply to
outdoor unit. (Is power
turned on?)
Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
Check communication
connectors on outdoor
P.C. boards.
Check for defect in outdoor
P.C. board (I/F).
E28
Detected
outdoor unit
No.
I/F
Outdoor
follower unit
error
All stop
Outdoor header unit receives
error code from outdoor
follower unit.
Check check code
displayed on outdoor
follower unit.
<Convenient functions>
If SW04 is pressed and held
for at least 1 second while
[E28] is displayed on the 7-
segmentdisplay of outdoor
header unit, the fan of the
outdoor unit that has been
shut down due to an error
comes on.
If SW04 and SW05 are
pressed simultaneously, the
fans of normal outdoor units
come on.
To stop the fan or fans, press
SW05 on its own.
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display
Sub-code
Check
code
Main
remote
controller
