Contractor 15205, Instructions Manual

Page: 28 / 120

ENGLISH
CONTRACOR
®
Version 3.9 28
6.8. Blast Machine Will Not Pressurize
6.8.1
Ensure that the air compressor is on and the air supply valve is in the open position.
6.8.2 Check that the air pressure regulator is set above 3 bar.
6.8.3 Door interlocks do not engage. To adjust door interlocks, refer to Section 4.3.5.
6.8.4 Ensure diaphragm in outlet valve is not worn.
6.8.5 Check wear and alignment on pop-up valve and O-ring.
6.8.6 Blocked or leaking control lines. Verify integrity of all fittings and tubing.
6.8.7 3-way valve in foot pedal is faulty. Check alignment of pedal and pressure in inlet
and outlet tubing.
6.8.8 Ensure that lines are correctly mounted on foot pedal or pilot regulator. For correct
installation, refer to Picture 14.
6.9. Blast Machine Will Not Depressurize Or
Depressurizes Too Slowly
6.9.1 Air should be exhausted by the 3-way valve in the pedal when released. Should
this not be the case, inspect switch.
6.9.2 Check the outlet rubber hose leading to the cabinet for blockage.
6.10. Heavy Media Flow
6.10.1 Ensure the choke valve is opened.
6.10.2 Media flow may be too high. Adjust media metering valve as per Section 4.3.2. If
adjusting metering valve does not control media flow, empy machine of media, depressurize
and shut off and disconnect from air supply. Disassemble and inspect the flow valve for wear.
6.11. Media Surge: A small amount of surge is
normal at start-up
6.11.1 Heavy media flow. Adjust per Section 6.10.
6.11.2 Metering valve is defective. Disassemble metering valve and inspect parts for
excessive wear.
6.12. Static shocks
6.12.1 Cabinet and/or operator not grounded. Abrasive blasting creates static