Troubleshooting - Storch LP 540 flex Handbuch

Troubleshooting

Problem Cause
The pump is not ven- Air leak due to a loose valve nut
tilated.
Air leak due to worn o-rings
Air leak due to a whole in the suc-
tion hose
Jammed or damaged balls
The pump ventilates Pressure set too low
but builds up virtually
no pressure, or insuffi-
cient pressure
Clogged filter
Outlet valve jammed/worn.
Ventilation/pressure relief valve is
bypassed
Packings and/or piston worn
The unit does not Worn or defective spraying nozzle
maintain good spra-
ying pressure
Packings and/or piston worn
Upper valve seat worn
The device will not Control settings
switch on
Pressure regulation unit (controller
card)
Motor
Remedy
Tighten the valve nut
Replace the o-ring on the valve seat and the o-ring
below the valve seat
Replace the suction hose
Maintain the inlet and outlet valves
Increase the pressure
Clean the gun filter, the inlet filter and/or the device fil-
ter, or replace them as needed.
Maintain the outlet valve
Clean the ventilation/pressure relief valve, or replace it.
Tighten the gland nut, replace the packing and, if nee-
ded, the piston.
Replace the spraying nozzle.
Replace the worn parts.
Replace the worn seat.
Make sure that the power plug on the device is plugged
in. Make sure that the ON/OFF switch is set to ON
position and that the pressure regulator button is fully
clockwise (max. pressure).
If the power display is not lit after checking the control
settings and the power source, you must replace the
pressure control unit.
Remove the cover on the carbon brushes and switch the
device on. Set the potentiometer to maximum pressure
and check the DC voltage on all the brush connectors.
The voltage should be more than 80 V (DC).
If DC voltage exists, switch the device off and unplug
the power plug. Make sure that the brushes contact the
rotor. Replace the brushes if their length is below 12.7
mm. If the brushes are OK, replace the motor.
If there is no DC voltage, see pressure sensor.
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