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13. Troubleshooting Guide
Problem
No air and no abrasive.
Only air, no or very
little abrasive.
Unit blasts continu-
ously.
Compressed air
leaking from the foot
switch.
Foot switch fails to
switch on.
EN
Possible cause
•
Blasting nozzle blocked at the
hand-piece.
•
Foot switch connecting lines
kinked.
•
The dosage nozzle in the mix-
ing chamber is blocked due to
contaminated or moist sand.
• Mixing chamber filter combination
blocked.
•
Abrasive contains impurities or is
moist.
•
Foot switch connected incorrectly.
•
Valve in foot switch is defective.
•
Pneumatic hoses reversed.
•
No pressure at the compressed
air connection.
•
Pneumatic hoses are kinked.
Corrective action
•
Unscrew the nozzle from the hand-piece and
blow it out.
•
With the nozzle removed, blow out the blasting
hose by activating the foot pedal.
•
Inspect/correct the connection lines.
•
Cleaning the dosing nozzle, see chapter 5.4.
• Change filter cartridge (Wrench SW14).
•
Replace the abrasive.
•
Inspect / correct the foot switch connection.
•
Replace foot switch.
•
Reverse the connections.
•
Inspect the compressed air lines and/or the com-
pressor.
•
Reposition the hoses.
Subject to modification.
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