Mitsubishi FDT125VNPWVH - Page 75

Error code
Remote control:
LED Green Red
Indoor
Content
E9
Drain trouble
(FDT, FDU, FDUA series)
Keeps ashing 1-time ash
1. Applicable model
5. Troubleshooting
FDT, FDU, FDUA series
Diagnosis Countermeasure
Is the humidifier
connected?
NO
Drain pump motor ON from the remote control
YES
Does drain pump motor
operate?
YES
NO
Check the error data in the remote control.
Is there any overflow?
Is DC12V
at CNI connector?
Is the
CNI connected
firmly?
NO
YES
Is
there any
anomaly on the option
equipment?
NO
YES
YES
Is the
humidifier drain pump motor
interlocked by the indoor unit function
setting of remote
control?
NO
YES
Is DC12V
detected at CNR
connector?
NO
YES
Is the drain
piping unclogged? Is the
drain pipe slop
OK?
NO
YES
NO
YES
NO
Check oat switch.
Correct it.
➞
Connect
connector.
Defective indoor unit
control PCB
➞
Replace.
Check option equipment.
Correct setting to
“Humidier drain pump
motor interlock”.
Defective indoor unit
control PCB
➞
Replace.
Check wiring of drain pump
motor.
Correct it.
Check drain pump motor.
2. Error detection method
Float switch is activated
3 . Condition of error displayed
If the oat switch OPEN
is detected for 3 seconds
continuously or if oat
switch connector or wire is
disconnected
4. Presumable cause
• Defective indoor unit control
PCB
• Float switch setting error
• Humidifier drain pump motor
interlock setting error
• Option equipment setting
error
• Drain piping error
• Defective drain pump motor
• Disconnection of drain pump
motor wiring
Note:
When this error occurred at power ON, disconnection of wire or connector of the oat switch is suspected. Check and
correct it (or replace it, if necessary).
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