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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 CN67 normal?
Check indoor P.C. board.
Defect → Replace
Check indoor control P.C. board
(MCC-1402).
Defect → Replace
Check power supply voltage.
Correct lines.
Check and eliminate noise, etc.
Check outdoor P.C. board.
Defect → Replace
Correct wiring of connector
and terminal blocks.
Correct wiring and
inter-unit cables.
Check CODE No. [14].
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
∗ As shown in the following figure,
carry out measurement within 20 seconds
after the power was turned on.
Black
S5277G
White
Terminal block
Check indoor P.C. board
(MCC-1402).
Defect → Replace
Does the voltage
between 2 and 3 of the indoor unit
inter-unit terminal blocks
(1, 2, 3) vary?
3
2
1
[E10 error]