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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
For other types of outdoor units, refer to their own service manuals.
Check code
Outdoor 7-segment display
Main
remote
Check
controller
code
E01
E02
E03
E04
No. of indoor
units from
which signal is
received
normally
E06
E06
E07
Location
Description
of
detection
Sub-code
Remote
Indoor-remote
controller
controller
communication
error
(detected at
remote
controller end)
Remote
Remote
controller
controller
transmission
error
Indoor
Indoor-remote
unit
controller
communication
error
(detected at
indoor end)
Indoor
Indoor-outdoor
unit
communication
circuit error
(detected at
indoor end)
I/F
Dropping out of
indoor unit
I/F
Indoor-outdoor
communication
circuit error
(detected at
outdoor end)
Error detection
System status
condition(s)
Stop of
Communication between
corresponding
indoor P.C. board and remote
unit
controller is disrupted.
Stop of
Signal cannot be transmitted
corresponding
from remote controller to
unit
indoor unit.
Stop of
There is no communication
from remote controller
corresponding
(including wireless) or
unit
network adaptor.
Stop of
Indoor unit is not receiving
corresponding
signal from outdoor unit.
unit
All stop
Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
All stop
Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
– 67 –
FILE NO. SVM-16042
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 termination
resistance 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 defect in indoor
P.C. board.
Check for defect in outdoor
P.C. board (I/F).
Check outdoor termination
resistance setting (SW30,
Bit 2).
Check connection of
indoor-outdoor
communication circuit.
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