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[E04 error]
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) wired to CN04 normal?
Does D502 (Orange LED) flash
after power supply turned on again?
Check indoor P.C. board.
Defect → Replace
Check indoor control P.C. board
(MCC-1403).
Defect → Replace
Check power supply voltage.
Correct lines.
Check and eliminate noise, etc.
Check outdoor P.C. board.
Defect → Replace
Check indoor P.C. board.
Defect → Replace
Correct wiring of connector
and terminal blocks.
Correct wiring and
inter-unit cables.
Check Item code [14].
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
[E10 error]