Daikin E-Series Service Manual page 346

SiAU18-715
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is drain
raising mechanism
connected?
YES
Is a drain
pump connected to the
indoor unit PCB?
YES
Does the
drain pump turn after
restarting operation?
NO
Set to"emergency" and check
the voltage of X25A.
220-240 VAC?
NO
Troubleshooting for SkyAir Indoor Unit
If "A3" is detected by a PC board
which is not mounted with X15A,
the PC board is defective.
Is the short-
NO
circuit connector
connected to X15A on
the indoor unit
PCB?
YES
Continuity check of short-circuit
connector
Is there continuity?
YES
NO
Is the
YES
drainwater level
abnormally high?
NO
Is the float
switch connected to
X15A?
YES
Remove the float switch from
X15A, short-circuit X15A, and
restart operation.
Does display
of malfunction "A3"
appear?
YES
YES
NO
Short-circuit connector
connection
NO
Short-circuit connector
replacement
Indoor unit PCB
replacement
Connect drain pump
YES
Malfuncton of drain system
NO
Froat switch connection
NO
Float switch replacement
Indoor unit PCB
replacement
Drain pump replacement
Indoor unit PCB
replacement
(Q0532)
333