–
84
–
'14 • KX-SM-221
Error code
Remote control:
7-segment display:
LED
Green
Red
Indoor
Outdoor
Content
E9
–
Drain trouble
Keeps flashing 1-time flash
Keeps flashing
Stays OFF
1. Applicable model
5. Troubleshooting
FDT, FDTC, FDTW, FDTQ,
FDTS, FDR, FDU, FDUM, and
FDUT series
Diagnosis
Countermeasure
Is the humidifier connected?
Drain motor ON from the remote control.
YES
Does the
drain motor
operate?
YES
NO
Check the error data in the remote control.
Is there any overflow?
Is DC
12V detected at CN1
connector?
Is the
CN1 connected
firmly
NO
YES
Is there any
anomaly on the option
equipment?
NO
YES
YES
Is the
humidifier drain
motor interlocked by the indoor unit
function setting of remote
control?
NO
Is
AC220/240V
or DC12V detected at
CNR?
NO
YES
Is the
drain piping unclogged?
Is the drain pipe
slop OK?
NO
YES
NO
YES
NO
NO
YES
Check float switch.
Check the connection of
CNI.
If it is loose, connect it
securely.
Replace indoor control
PCB.
Check option equipment
Correct setting to
"Humidifier drain motor
interlock".
Indoor control PCB or
power PCB
(FDTC)
anomaly
→
Replace it.
Check the wiring of drain
motor.
Correct it.
Check drain motor.
2. Error detection method
Float switch is activated.
3. Condition of error displayed
If the float switch OPEN
is detected for 3 seconds
continuously or if float switch
connector is disconnected or
wire broken.
4. Presumable cause
• Indoor control PCB anomaly
• Mistake in setting of float
switch
• Mistake in setting of
humidifier drain motor
interlock
• Mistake in setting of option
equipment
• Mistake in drain piping
• Drain motor anomaly
• Disconnection/breakage of
drain motor wires
Note:
When this anomaly occurs at power ON, disconnection of connector or breakage of wire of float switch is suspected.
Check and correct it (or replace it, if necessary).
