Water Drain Abnormal - Fujitsu AB A30LBT Series Service Instruction

( For AU Type )
Trouble shooting 6
INDOOR UNIT Error Method:

Water Drain Abnormal

Detective Actuators:
Indoor Unit Controller PCB Circuit
Float Switch
Forecast of Cause:
1. Float Switch failure 2. Shorted connector/ wire 3. Controller PCB failure
Check Point 1 : Check Float Switch
Check operation of float switch. (any blocking by dust, etc.)
Remove Float switch and check ON/OFF switching operation
by using a meter.
>> If Float switch is detective, replace it.
OK
Check Point 2 : Check Connector (CN9) / Wire
Check loose contact of CN9 /shorted wire (pinched wire).
>> Replace Float switch if the wire is abnormal
OK
Check Point 3 : Replace Controller PCB
If Check Point 1 & 2 do not improve the symptom, change Controller PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Float Switch is ON for more than 3 minutes.
ON ON
02-10
OFF OFF