Troubleshooting Guide - Renfert Basic mobil Bedienungsanleitung

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.