– 180 –
8-4. Check Codes Displayed on Remote Controller and SMMS-i Outdoor Unit (7-
Segment Display on I/F Board) and Locations to Be Checked
For other types of outdoor units, refer to their own service manuals.
Check code
Location
of
detection
System statusDescription
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display
Main
remote
controller
Check
code
Sub-code
Remote
controller
——E01
Stop of
corresponding
unit
Communication between
indoor P.C. board and remote
controller is disrupted.
• 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.
Indoor-remote
controller
communication
error
(detected at remote
controller end)
Remote
controller
——E02
Stop of
corresponding
unit
Signal cannot be transmitted
from remote controller to
indoor unit.
• Check internal transmission
circuit of remote controller.
--- Replace remote controller
as necessary.
Remote controller
transmission error
Indoor unit
——E03
Stop of
corresponding
unit
There is no communication
from remote controller
(including wireless) or network
adaptor.
• Check remote controller and
network adaptor wiring.
Indoor-remote
controller
communication
error
(detected at
indoor end)
Indoor
unit
——E04
Stop of
corresponding
unit
Indoor unit is not receiving
signal from outdoor unit.
• 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-outdoor
communication
circuit error
(detected at
indoor end)
Indoor unit
I/F
Duplicated
indoor address
E08E08
All stop More than one indoor unit is
assigned same address.
• Check indoor addresses.
• Check for any change made to
remote controller connection
(group/individual) since indoor
address setting.
Duplicated
indoor address
I/F
E07——
All stop Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
• Check outdoor termination
resistance setting (SW30,
Bit 2).
• Check connection of
indoor-outdoor
communication circuit.
Indoor-outdoor
communication
circuit error
(detected at
outdoor end)
Indoor unit
——E10
Stop of
corresponding
unit
Communication cannot be
established/maintained upon
turning on of power or during
communication.
• Check for defect in indoor
P.C. board
Indoor inter-MCU
communication
error
I/F01:
Indoor-outdoor
communication
02:
Outdooroutdoor
communication
E12E12
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.
• Perform automatic address
setting again after
disconnecting
communication cable to that
refrigerant line.
Automatic
address starting
error
Remote
controller
——E09
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.)
• Check remote controller
settings.
• Check remote controller
P.C. boards.
Duplicated master
remote controller
I/FNo. of indoor
units from
which signal is
received
normally
E06E06
All stop Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
• 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).
Dropping out of
indoor unit
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