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Is not yet capacity setting
of indoor unit set up?
Is group control operation?
Is power of all indoor units turned on?
Is inter-unit cable
of A and B normal?
Is there no contact error
of indoor/outdoor inter-unit wire
Is there no disconnection
or contact error of connector
on harness from terminal block
of indoor unit?
Set capacity data of indoor unit.
(Setup CODE No. (DN)=11)
Check indoor P.C. board (MCC-1402).
Defect → Replace
YES
NO
Check indoor P.C. board
(MCC-1402).
Defect → Replace
Correct indoor/outdoor inter-unit wire
(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
Is connection twin-triple connection?
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
[E18 error]
[E08, L03, L07, L08 error]
E08: Duplicated indoor unit No.
L03: There are 2 or more header 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. (99)
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.
[L09 error]