PROBLEM
POSSIBLE CAUSE
SOLUTION
The dryer beeps and the
blue light is ON
The water tank is full
Empty the tank according to the user
´s manual
instructions
The float is in the wrong
position
Confirm that the float is well placed and
connected
The float is not working
correctly
Confirm that the float works properly, if not,
replace the float for a new one
In other cases
Confirm that the ECU is working properly. If not,
replace the ECU for a new one
The dryer makes a weird
noise
The hand dryer is not fixed
properly
Check if the backplate is correctly fixed to the
wall
The motor is damaged
Check the coal motor brushes condition and
make sure the motor is working properly
External solids
Check if any external solid is moving freely
inside the motor or inside the cover
The ECU is damaged
Make sure that the ECU is feeding properly the
motor and that no component is damaged. If
not, replace the ECU
Only the heating element
works and it turns red
The coal motor brushes
are over
Check if the coal motor brushes are well
assembled and in good condition, if not, replace
the motor
The motor is not wired
properly
Check if the motor is properly wired to the ECU
Other motor faults
Check if the motor works properly and if any
component is damaged. If necessary replace
the damaged component
The dryer blows a low
airflow
The motor speed is set up
to a minimum
Check the speed adjustment potentiometer and
set it to a higher speed
Insufficient voltage value
Make sure the ECU is supplied with the proper
power and the hand dryer is properly grounded
The filter is dirty
Clean the filter or replace it
In other cases
Check if the motor is working properly. If yes,
replace the ECU
The dryer produces sparks
or burning smell
The coal motor brushes
are over
Check if the coal motor brushes are well
assembled and in good condition, if not, replace
the motor
The motor is damaged
Check if the motor works properly and if any
component is damaged. If necessary, replace
the motor
Hand dryer Troubleshooting Guide
Dualflow Plus
ECU: Electronic Control Unit
These tasks must be performed by a qualified technician
