Accurex XRUBS-140HP Installatie-, Bedienings- en Onderhoudshandleiding - Pagina 10

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Troubleshooting

WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
PROBLEM
CAUSE
Wheel rubbing inlet
V-belt drive
Bearings
Wheel unbalance
Belts too tight or too loose
Excessive
Wheel improperly aligned and
noise or
rubbing
vibration
Loose drive or motor pulleys
Foreign objects in wheel or
housing
Fan base not securely anchored
Motor hood loose and rattling
Defective or loose motor
bearings
Fan
High
horsepower
Duct system
Electrical supply
Fan doesn't
operate
Drive
Motor
Lubrication
Mechanical
Belt slippage
Motor
Over/Under line voltage
overloads or
Incorrect wheel rotation
overheats
Wheel RPM too high
Undersized motor
Motor wired incorrectly
System resistance too high
Unit running backwards
Excessive dirt buildup on wheels Clean wheel.
Reduced
Improper wheel alignment
airflow
Dampers closed
Blocked duct/clogged filter
Belt slippage
Speed to slow
10
Steel Grease Fan
Avant d'entreprendre toute action corrective, s'assurer
que l'appareil ne pourra pas fonctionner durant les
réparations.
CORRECTIVE ACTION
Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.
Tighten pulleys on motor/fan shaft. Adjust belt tension. Align pulleys properly,
see page 6, Figures 10 and 11. Replace worn belts or pulleys.
Replace defective bearing(s). Lubricate bearings. Tighten collars and
fasteners.
Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
Adjust tension, see page 6, Figures 12 and 13.
Center wheel on inlet, page 6, Figure 8.
Align and tighten. See Pre-Starting Checks, page 6.
Remove objects, check for damage or unbalance.
Secure properly.
Tighten fasteners to secure motor hood.
Replace motor with same frame size, RPM-HP.
Check rotation of wheel, see page 6, Figure 9. Reduce fan speed.
Resize ductwork. Check proper operation of face and bypass dampers. Check
filters and access doors.
Check fuses/circuit breakers. Check for switches off. Check for correct supply
voltage.
Check for broken belts. Tighten loose pulley or belts.
Ensure motor is correct horsepower and not tripping overload protector.
Check for excessive or insufficient grease in the bearing.
Replace damaged bearing. Relieve excessive belt tension. Align bearings.
Check for bent shaft.
Adjust tension or replace bad belts, see page 6.
Contact power company.
Check motor wiring, see page 4, Figure 3.
Check drives or slow down fan by opening variable pitch pulley on motor
shaft.
Check motor ratings with catalog speed and air capacity chart.
Check motor wiring to wiring diagram located on fan motor.
Check system: Proper operation of backdraft or control dampers, obstruction
in ductwork, clean dirty filters.
Correct as shown on page 6, Figure 9.
Center wheel on inlets, see Pre-Starting Checks, on page 6.
Inspect and repair.
Clean or replace.
Replace and adjust tension.
Check for correct drives.
AVERTISSEMENT