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Is there no disorder of power supply?
Check power supply voltage.
Correct lines.
Check and eliminate noise, etc.
YES
NO
Check indoor control P.C. board.
Defect → Replace
Is group control operation?
Is power of all indoor units turned on?
Is Twin or Triple control?
Is inter-unit cable
of A and B normal?
Is there no contact error
of indoor/outdoor inter-unit cable
(Signal line) of the main unit?
Is there no disconnection
or contact error of connector
on harness from terminal block
of indoor unit?
Check indoor P.C. board.
Defect → Replace
Correct indoor/outdoor inter-unit cable
(Serial signal line).
Check power
connection status of indoor unit
(Connect again).
Correct connection of connector.
Check circuit wiring.
Correct inter-unit cable
of remote controller.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
[E10 error]
[E18 error]
[E08, L03, L07, L08 error]
E08: Duplicated indoor unit No.
L03: There are 2 or more master units in a group control.
L07: There is 1 or more group address [Individual] in a group control.
L08: The indoor group address is unset. (13. ADDRESS SETUP)
If the above error is detected when power supply turned on, the mode enters automatically in the automatic
address set mode. (Check code is not output.)
However, if the above error is detected during the automatic address set mode, a check code may be
output.