Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is drain
raising mechanism
connected?
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is
a drain pump
connected to the indoor unit
PC board?
Is there continuity?
Does
the drain pump
turn after restarting
operation?
220-240 VAC?
NO
Set to“emergency” and check
the voltage of X25A.
Does display
of malfunction “A3”
appear?
Remove the float switch from
X15A, short-circuit X15A, and
restart operation.
NO
NO
NO
NO
NO
NO
Continuity check of short-
circuit connector
Corner or built-in type?
Is the
short-circuit connector
connected to X15A on the
indoor unit PC
board?
Is the float
switch connected to
X15A?
Is the
drainwater level abnormally
high?
If “A3” is detected by a PC board
which is not mounted with X15A,
the PC board is defective.
Short-circuit connector
connection
Short-circuit connector
replacement
Indoor unit PC board replacement
Connect drain pump
Malfuncton of drain system
Froat switch connection
Float switch replacement
Indoor unit PC board replacement
Drain pump replacement
Indoor unit PC board
replacement
(MF012)
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