133
For details, refer to “8-5. Troubleshooting in test operation”.
Check code
Check code name
Cause
Is there no
miswiring/disconnection
on communication line
between indoor and
outdoor?
Sub-code: No. of indoor units which received signals normally
Decreased number of indoor units
1. Communication lines (U1, U2) connection error between
indoor and outdoor
2. Communication connector's connection error on indoor
unit, error on P.C. board
3. Communication connector's connection error on outdoor
unit, error on I/F board
4. Power supply of indoor unit (Is power turned on?)
Is connection
of CN40 connector
on indoor P.C. board
normal?
Is connection of CN01
connector on outdoor I/F
P.C. board normal?
Is power of indoor unit
turned on?
Did a power failure
occur?
Is there no noise, etc.?
Check indoor P.C. board.
Defect ➝ Replace
Correct communication line.
Correct wiring or connector.
Turn on power of indoor unit.
Clear the check code.
Check noise, etc, and eliminate it if
any.
(NOTE)
1. When signal is not sent for a certain period from the indoor unit which has
used to send signals normally, [E06] is displayed.
Was power turned on
in order of indoor unit
➝ outdoor unit?
Check code
Check code name
Indoor/Outdoor communication
circuit error
(Detected at indoor side)
Cause
1. Power of outdoor unit was firstly turned on.
2. Connection error of communication line between indoor
and outdoor
3. End terminal resistance setup error on communication
between indoor and outdoor
4. Address setup error
Is connection (U1/U2
terminals) of indoor/
outdoor inter-unit wire
normal?
Is connector
connection from U1/U2
terminals of indoor/outdoor
inter-unit wire normal?
Is the end terminal
resistance setup of outdoor
unit normal?
Is address setup correct?
Is power applied to fuse
(F03) on indoor P.C.
board?
Is there no noise, etc.?
Check indoor P.C. board.
Defect ➝ Replace
Correct connector connection.
Turn on power again in order of
indoor unit ➝ outdoor unit.
Correct inter-unit wire.
Check noise, etc, and
eliminate it if any
Correct the end terminal
resistance setup.
Set up address again.
Check connection of inter-unit wire
between indoor and outdoor
is correct, and then connect
communication line connector on
indoor P.C. board (CN40) to CN44
(EMG).
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