Daikin FTX25JVEA9 Service Manual page 267

Troubleshooting - SkyAir Indoor Unit
Troubleshooting
254
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Corner or built-in type?
YES
NO
Is drain
raising mechanism
connected?
YES
Is
a drain pump
connected to the indoor unit
PC board?
YES
Does
the drain pump
turn after restarting
operation?
NO
Set to"emergency" and check
the voltage of X25A.
220-240 VAC?
NO
If "A3" is detected by a PC board
which is not mounted with X15A,
the PC board is defective.
Is the
NO
short-circuit connector
connected to X15A on the
indoor unit PC
board?
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 PC board replacement
Connect drain pump
YES
Malfuncton of drain system
NO
Froat switch connection
NO
Float switch replacement
Indoor unit PC board replacement
Drain pump replacement
Indoor unit PC board
replacement
Service Diagnosis
Si18-201
(MF012)