Daikin SkyAir Service Manual page 172

SiBE28-804
Troubleshooting
Note: If "A3" is detected by a PC board which is not mounted with X15A, the PC board is defective.
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Begin
Is the
NO
unit a
drain raising
cassette or
mechanism
built-in
YES
Is a
drain pump
NO
connected to the
indoor unit
PCB?
YES
Does the
NO
drain pump work after
restarting operation?
YES
Is the
NO
drain water level
switch connected
abnormally
high?
YES
There is a Remove the float switch
malfunction of from X15A, short-circuit
the drain system. X15A, and restart operation.
"A3" appear on
the remote controller
Replace indoor
unit PC board.
Troubleshooting by Remote Controller Display / LED Display
Is the
optional
circuit connector
NO
connected to X15A on
the indoor unit
YES
Check the continuity of the
short-circuit connector.
Connect
the drain
continuity?
pump.
Replace the
indoor unit PCB.
Is
Connect
the float
NO
float
to X15A? switch
YES
Does
NO
display?
YES
Is
the short
Connect the
NO
Short-circuit
connector.
PCB?
YES
YES
Connect the
Is there NO
Short-circuit
connector.
YES
Set to
"emergency"
and check
the voltage
of X25A.
Replace
NO
220-240
indoor unit
VAC?
PC board.
YES
Replace the
drain pump.
Replace
float switch.
161