Check code
Location
of
detection
Description
System status
Check code detection
condition(s)
Check items (locations)
• Check power supply to
indoor unit.
(Is power turned on?)
• Check indoor-outdoor
power-on sequence.
• Check indoor address
setting
• Check wiring of Indoor-
outdoor communication
wires
• Check outdoor terminator
resistor setting (SW100,
Bit 2).
Indoor unit
No. of indoor
units from
which signal is
received
normally
Display on main remote
controller.
Indoor units unavailable for
indoor / outdoor
communication. :E04
Indoor units available for
indoor / outdoor
communication. : E06
Indoor-outdoor
communication
circuit trouble
(E04)
All stop
Condition 1
One indoor unit or more
initially communicating
normally fails to return signal
for specified length of time.
Condition 2
Outdoor I / F board
SW103, Bit4 : ON
(To switch the check code
detection condition.)
E04/E06
E06
• Check power supply to
indoor unit.
(Is power turned on?)
• Check connection of
indoor-outdoor
communication cable.
• Check connection of
communication connectors
on indoor P.C. board.
• Check connection of
communication connectors
on outdoor P.C. board.
• Check for failure in indoor
P.C. board.
• Check for failure in outdoor
P.C. board (I/F).
I/F
Dropping out of
indoor unit
(E06)
• Check outdoor terminator
resistor setting (SW100,
Bit 2).
• Check connection of
indoor-outdoor
communication circuit.
I/F
Indoor-outdoor
communication
circuit trouble
(detected at
outdoor end)
All stop
Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
—
E07
—
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group/
individual) since indoor
address setting.
Indoor unit
I/F
Duplicated
indoor address
Duplicated
indoor address
All stop
More than one indoor unit
are assigned same address.
E08
E08
• 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
—
• 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
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
1
ON
2 3
SW103
4
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