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Is there no disorder of power supply?
Does outdoor operate?
Is group address setup of
remote controller correct?
Are wiring in indoor unit and
1, 2, 3 inter-unit cables correct?
Are wirings of
terminal blocks (1, 2, 3) normal?
Check indoor P.C. board.
Defect → Replace
Check indoor control P.C. board
(MCC-1570).
Defect → Replace
Check power supply voltage.
Correct lines.
Check and eliminate noise, etc.
Check outdoor P.C. board.
Defect → Replace
Correct wiring
of terminal blocks.
Correct wiring and
inter-unit cables.
Check Item code [L07].
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
[E04 error]
[E10 error]
<In case of SP40, SP45>