Service manual

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(V2820)
Operation
is normal if one
place of power supply line
phase is replaced.
Fix the open phase. Requires
inspection of field power supply
section.
Reverse phase
Counter measure of the problem is
completed by phase replacement.
Replace outdoor unit PC board
(A1P).
• With single systems, replace the
control PC board 1 (A1P) or the
control PC board 3 (A3P).
• With multi systems, replace the
ma
in PC board (A1P).
YES
YES
NO
NO
There is
an open phase at
the power supply terminal
section (X1M) of the
outdoor unit.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.