Troubleshooting - Storch Airless SL 1200 S Bedienungsanleitung

11. Troubleshooting

Problem Cause
The pump is not ven- Air leak due to a loose valve nut
tilated.
Air leak due to worn o-rings
Bypass valve does not open
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
Packing elements and/or piston
worn
The unit does not Worn or defective spraying nozzle
maintain good spra-
ying pressure
Packing elements and/or piston
worn
Upper valve seat worn
The device will not Control settings
switch on
Pressure regulation unit (controller
card)
Motor
The device will not Pressure sensor
switch on
Pressure regulator button (poten-
tiometer)
Remedy
Tighten the valve nut
Replace the o-ring on the valve seat and the o-ring
below the valve seat
Clean or replace the bypass valve
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 element and
the piston if necessary.
Replace the spraying nozzle.
Replace the worn parts.
Replace the worn seat.
Make sure the mains plug on the device is plugged in.
Make sure that the ON/OFF switch is set to the ON
position and that the pressure regulator knob is fully
clockwise (max. pressure)
If the power display does not illuminate after checking
the control settings and the power source, you will need
to replace the pressure regulating 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 is present, switch off the device and dis-
connect the mains plug. Make sure that the brushes
contact the rotor. Replace the brushes if they are less
than 1.6 mm in length. If the brushes are OK, replace
the motor.
If there is no DC voltage, see pressure sensor.
Fit a different pressure sensor on the controller card. If
the device starts, the old sensor is defective.
If the sensor passes all the tests, see pressure regula-
ting button (potentiometer).
Fit a different potentiometer on the control panel. If the
device starts, the old potentiometer is defective.
If DC voltage is present on the motor brushes, and both
the sensor and the pressure regulating button are wor-
king, replace the pressure regulator unit.
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