belfab NBM-OP Manuel D'instruction Et De Maintenance page 14

1. Dust coming through the discharge of the unit:
• Check for improperly installed filter bags (be sure that the grooves on
the bi-benders are properly engaged in the hole sheet).
• Check for holes in filter bags.
2. Inadequate Suction:
• Fan is running in wrong direction - Electrical wiring should be reversed.
• Forty-five (45) gallon storage drums or dumping bins are not sealed
properly – Adjust for proper seal.
• Filter bags are dirty - Clean or replace filter bags.
• Dampers or gates are closed - Open dampers or gates.
• Duct work is leaking or blocked - Repair or unblock ducts.
• Worn Impeller - Replace Impeller.
• The storage bin is full and the filter bags are blocked - Empty storage
and manually clean filter bags before restarting unit. DO NOT USE THE
SHAKER.
3. Unit is unduly noisy or has excessive vibration:
• Broken or damaged fan blade - Replace fan impeller.
• Fan is unbalanced - Check for wear or missing balance weight, if
applicable.
• Loose mounting bolts on unit - Tighten bolts.
• Loose fan impeller - Adjust and tighten.
• Loose guards - Tighten bolts.
• Bent shaft - Replace motor.
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TROUBLESHOOTING GUIDE