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8-4. Check Codes list
For other types of outdoor units, refer to their own service manuals.
Check code
Outdoor 7-segment display
Controller
Check
Sub-code
code
C05
—
C06
—
C12
—
E01
—
—
E02
—
—
E03
—
—
E04
—
—
Location
Description
System status
of
detection
Central
Central control
Continued
control
device
operation
device
transmission
trouble
Central
Central control
Continued
control
device reception
operation
device
trouble
General-
Batch alarm
Continued
purpose
for general-
operation
device
purpose
I/F
device
control interface
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 unit
Indoor-remote
Stop of
controller
corresponding
communication
unit
trouble
(detected at
indoor end)
Indoor unit
Indoor-outdoor
Stop of
communication
corresponding
circuit trouble
unit
(detected at
indoor end)
- 179 -
Check code detection
Check items (locations)
condition(s)
Central control device is
• Check for failure in central
unable to transmit signal.
control device.
• Check for failure in central
control communication line.
• Check termination
resistance setting.
Central control device is
• Check for failure in central
unable to receive signal.
control device.
• Check for failure in central
control communication line.
• Check terminator resistor
setting.
• Check power supply for
devices at other end of
central control
communication line.
• Check failure in P.C.
boards of devices at other
end of central control
communication line.
Trouble signal is input to
• Check trouble input.
control interface for general-
purpose devices.
• Check remote controller
Communication between
indoor P.C. board and
inter-unit tie cable (A/B).
remote controller is
• Check for broken wire or
disrupted.
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.
Signal cannot be transmitted
• Check internal
from remote controller to
transmission circuit of
remote controller.
indoor unit.
--- Replace remote
controller as necessary.
There is no communication
• Check remote controller
from remote controller
and network adaptor
(including wireless) or
wiring.
network adaptor.
Indoor unit is not receiving
• Check order in which
signal from outdoor unit.
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).
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Troubleshooting
