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6-3.Check Codes Displayed on Remote Controller and SMMS-u 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
De
s
cription
S
y
s
tem
s
tatu
s
Check code detection
condition(
s
)
Check item
s
(location
s
)
• Check remote controller
inter-unit tie cable (A/B).
• Check for broken wire or
connector bad contact.
• Check indoor power
supply.
• Check for failure 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
trouble
(detected at
remote
controller end)
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
trouble
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
trouble
(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 terminator
resistor setting (SW100,
Bit 2).
Indoor unit
Indoor-outdoor
communication
circuit trouble
(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 failure in indoor
P.C. board.
• Check for failure in outdoor
P.C. board (I/F).
I/F
No. of indoor
units from
which signal is
received
normally
Dropping out of
indoor unit
All stop
Condition 1
All indoor unit initially
communicating normally
fails to return signal for
specified length of time.
Condition 2
Outdoor I / F board
SW103, Bit4 : OFF
(Factory default)
E04
E06
• 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
Indoor-outdoor
communication
circuit trouble
Only specified
indoor units stop
Condition 1
Indoor unit initially
communicating
normally fails to return
signal for specified
length of time.
—
—
Main
remote
controller
Outdoor 7-
s
egment di
s
play
Check
code
S
ub-code
