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8-4. Check codes displayed on remote controller and SMMS outdoor unit (7-segment
display on I/F board) and locations to be checked
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
• Check remote controller
inter-unit tie cable (A / B).
• Check for broken wire or
connector bad contact.
• Check indoor power supply.
• Check for defect in indoor
P.C. board.
• Check remote controller
address settings
(when two remote
controllers are in use).
• Check remote controller
P.C. board.
Remote
controller
Indoor-remote
controller
communication
error
(detected at
remote
controller end)
For other types of outdoor units, refer to their own service manuals.
Stop of
corresponding
unit
Communication between
indoor P.C. board and
remote controller is disrupted.
E01
—
—
• Check internal
transmission circuit of
remote controller.
--- Replace remote
controller as necessary.
Remote
controller
Remote
controller
transmission
error
Stop of
corresponding unit
Signal cannot be transmitted
from remote controller to
indoor unit.
E02
—
—
• Check remote controller
and network adaptor wiring.
Indoor unit
Indoor-remote
controller
communication
error
(detected at
indoor end)
Stop of
corresponding unit
There is no communication
from remote controller
(including wireless) or
network adaptor.
E03
—
—
• Check order in which
power was turned on for
indoor and outdoor units.
• Check indoor address
setting.
• Check indoor-outdoor tie
cable.
• Check outdoor termination
resistance setting (SW30,
Bit 2).
Indoor unit
Indoor-outdoor
communication
circuit error
(detected at
indoor end)
Stop of
corresponding unit
Indoor unit is not receiving
signal from outdoor unit.
E04
—
—
• 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 defect in indoor
P.C. board.
• Check for defect in outdoor
P.C. board (I/F).
I/F
Dropping out of
indoor unit
All stop
Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
E06
E06
No. of indoor
units from
which signal is
received
normally
• Check outdoor termination
resistance setting (SW30,
Bit 2).
• Check connection of
indoor-outdoor
communication circuit.
I/F
Indoor-outdoor
communication
circuit error
(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
All stop
More than one indoor unit is
assigned same address.
E08
Duplicated
indoor address
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 defect in indoor
P.C. board
Indoor unit
Indoor inter-
MCU
communication
error
Stop of
corresponding unit
Communication cannot be
established / maintained
upon turning on of power or
during communication.
E10
—
—
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
Indoor unit (including Hot Water Module)
