Daikin FCQ35B7V1 Service Manual page 196

Error Codes
1
Troubleshooting
3 3
4
5
Remark
Caution
3–34
Begin
Is the unit a
No
cassette or built-in
type?
Yes
Is a
drain pump
connected to the
No
indoor unit
PCB?
Yes
Does
the drain pump
work after restarting
operation?
Yes
Is the
drain water
No
level abnormally
high?
Yes
Remove the float switch from
There is a malfunction
X15A, short-circuit X15A, and
of the drain system.
If "A3" is detected by a PC board which is not mounted with X15A, the PC board is defective.
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Is the
optional drain
No
connected to X15A on the
raising mechanism
connected?
Yes
Check the continuity of the
Connect the
drain pump.
No
Is the
float switch
Connect
No
connected to
float switch
X15A?
Yes
restart operation.
Does "A3"
appear on the remote
controller display?
Yes
Replace indoor
unit PCB.
Is the short-
circuit connector
No
indoor unit
PCB?
Yes
short-circuit connector.
Yes
Is there
No
continuity?
Yes
Replace the
indoor unit PCB.
Set to
"emergency" and
check the voltage
of X25A.
220-240
No
VAC?
Yes
Replace the
drain pump.
Replace float
No
switch.
Part 3 – Troubleshooting
ESIE05-04
Connect the
Short-circuit
connector.
Replace the
Short-circuit
connector
Replace indoor
unit PCB.