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9-4. Check codes displayed on remote controller and
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
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
E01
–
–
E02
–
–
E03
–
–
E04
–
–
No. of indoor
units from
which signal is
received
normally
E06
E06
–
E07
–
Duplicated
indoor address
E08
E08
Location
of
Description
System status
detection
Remote
Indoor-remote
Stop of
controller
controller
corresponding
communication
unit
trouble
(detected at
remote
controller end)
Remote
Remote
Stop of
controller
controller
corresponding
transmission
unit
trouble
Indoor
Indoor-remote
Stop of
unit
controller
corresponding
communication
unit
trouble
(detected at
indoor end)
Indoor
Indoor-outdoor
Stop of
unit
communication
corresponding
circuit trouble
unit
(detected at
indoor end)
I/F
Dropping out of
All stop
indoor unit
All stop
I/F
Indoor-outdoor
communication
circuit trouble
(detected at
outdoor end)
Indoor
Duplicated
All stop
unit
indoor address
I/F
Check code detection
condition(s)
Communication between
indoor P.C. board and remote
controller is disrupted.
Signal cannot be transmitted
from remote controller to
indoor unit.
There is no communication
from remote controller
(including wireless) or
network adaptor.
Indoor unit is not receiving
signal from outdoor unit.
Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
More than one indoor unit is
assigned same address.
107
118
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.
Check internal
transmission circuit of
remote controller.
--- Replace remote
controller as necessary.
Check remote controller
and network adaptor
wiring.
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 (SW30,
Bit 2).
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 trouble in indoor
P.C. board.
Check for trouble in outdoor
P.C. board (I/F).
Check outdoor terminator
resistor setting (SW30,
Bit 2).
Check connection of
indoor-outdoor
communication circuit.
Check indoor addresses.
Check for any change
made to remote controller
connection (group /
individual) since indoor
address setting.
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Troubleshooting
