– 47 –
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
• Perform automatic address
setting again after
disconnecting
communication cable to
that refrigerant line.
I/F
01:
Indoor-outdoor
communication
02:
Outdooroutdoor
communication
Automatic
address starting
error
∗
When the indoor unit connection capacity is calculated, AP005 is calculated as 0.8 HP.
All stop
• Indoor automatic address
setting is started while
automatic address setting
for equipment in other
refrigerant line is in
progress.
• Outdoor automatic
address setting is started
while automatic address
setting for indoor units is in
progress.
E12
E12
• Check connection of
indoor-outdoor
communication line.
• Check for error in indoor
power supply system.
• Check for noise from other
devices.
• Check for power failure.
• Check for defect in indoor
P.C. board.
I/F
—
Indoor unit not
found during
automatic
address setting
All stop
Indoor unit cannot be
detected after indoor
automatic address setting is
started.
E15
E15
• Check capacities of indoor
units connected.
• Check combined HP
capacities of indoor units.
• Check HP capacity settings
of outdoor units.
• Check No. of indoor units
connected.
• Check for defect in outdoor
P.C. board (I/F).
I/F
Too many
indoor units
connected
00:
Overloading
01-:
No. of units
connected
All stop
• Combined capacity of
indoor units exceeds 135%
of combined capacity of
outdoor units.
∗
Note:
If this code comes up
after backup setting for
outdoor unit failure is
performed, perform “No
overloading detected”
setting.
<“No overloading detected”
setting method>
Turn on SW09/Bit 2 on I/F
P.C. board of outdoor
header unit.
• More than 48 indoor units
are connected.
E16
E16
• Check remote controller
wiring.
• Check indoor power supply
wiring.
• Check P.C. boards of
indoor units.
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.
E18
—
Outdoor header unit is
outdoor unit to which indoor-
outdoor tie cable (U1,U2) is
connected.
• Check connection of
indoor-outdoor
communication line.
• Check for defect in outdoor
P.C. board (I/F).
I/F
00:
No header unit
02:
Two or more
header units
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.
E19
E19
Disconnect inter-line tie
cable in accordance with
automatic address setting
method explained in
“Address setting” section.
I/F
01:
Connection of
outdoor unit
from other line
02:
Connection of
indoor unit from
other line
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.
E20
E20
• 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.
I/F
—
Outdooroutdoor
communication
transmission
error
All stop
Signal cannot be transmitted
to other outdoor units for at
least 30 seconds
continuously.
E23
E23
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
Indoor unit (including Hot Water Module)
