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Check code
Location
of
detection
Description System status
Check code detection
condition(s)
Check items (locations)
• 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 failure in outdoor
P.C. board (I/F).
I/F00:
Capacity over
01-:
No. of units
connected
Too many
indoor units
connected
All stop • Combined capacity of
indoor units is too large.
Note:
If this code comes up
after backup setting for
outdoor unit failure is
performed, perform "No
capacity over detected"
setting.
<"No capacity over detected"
setting method>
Turn on SW09 or SW103 /
Bit 3 on I/F P.C. board of
outdoor header unit.
For Cooling Only model,
this check code is not
displayed even if it exceeds
the combined capacity of
indoor units.
• More than 128 indoor units
are connected.
E16 E16
• Check remote controller
wiring.
• Check indoor power supply
wiring.
• Check P.C. boards of
indoor units.
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.
E18 — —
The outdoor unit which
turned on SW101 and the
bit 1 of the interface P.C.
board is set to Header unit.
• Check SW101 bit 1 of
follower outdoor unit.
• Check connection of
indoor-outdoor
communication line.
• Check for failure in outdoor
P.C. board (I/F).
I/F00:
No header unit
02:
Two or more
header units
Trouble in
number of
outdoor header
units
All stop • There are more than one
outdoor header units in
one line.
• There is no outdoor header
unit in one line.
E19 E19
Check whether the outdoor
unit of other systems or the
indoor unit is connected to
Uv (U1/U2) line or Uc
(U5/U6) line.
I/F01:
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
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
• Check remote controller
settings.
• Check remote controller
P.C. boards.
Remote
controller
Duplicated
master remote
controller
Stop of
corresponding
unit
In two remote controller
configuration (including
wireless), both controllers
are set up as master.
(Header indoor unit is shut
down with alarm, while
follower indoor units
continue operating.)
E09 — —
• Check for failure in
indoor P.C. board
Indoor unit Indoor inter-
MCU
communication
trouble
Stop of
corresponding
unit
Communication cannot be
established/maintained upon
turning on of power or
during communication.
E10 — —
• Check connection of
indoor-outdoor
communication line.
• Check for trouble in indoor
power supply system.
• Check for noise from other
devices.
• Check for power failure.
• Check for failure 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 whether the outdoor
unit of other systems or the
indoor unit is connected to
Uv (U1/U2) line or Uc
(U5/U6) line.
• Perform automatic address
setting again after
disconnecting
communication cable to
that refrigerant line.
Automatic
address starting
trouble
01:
Indoor-outdoor
communication
02:
Outdoor-outdoor
communication
I/F 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
Indoor unit (including Hot Water Module)
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