Troubleshooting; Our Commitment - Accurex XRUD Direct Drive Installation, Operation And Maintenance Manual

Troubleshooting

WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
PROBLEM
Wheel rubbing inlet
V-belt drive
Bearings
Wheel unbalance
Excessive
Belts too tight or too loose
noise
Wheel improperly aligned and rubbing Center wheel on inlet, see page 7, Figure 12.
or 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 does
Drive
not operate
Motor
Lubrication
Mechanical
Belt slippage
Motor
Over/Under line voltage
overloads
or overheats
Incorrect wheel rotation
Wheel RPM too high
Undersized motor
Motor wired incorrectly
System resistance too high
Unit running backwards
Excessive dirt buildup on wheels
Reduced
Improper wheel alignment
airflow
Dampers closed
Blocked duct/clogged filter
Belt slippage
Speed too slow

Our Commitment

Our Commitment
As a result of our commitment to continuous improvement, Accurex reserves the right to change specifications
without notice.
Product warranties can be found online at accurex.com, either on the specific product page or in the Warranty
section of the website at Accurex.com/Resources/Warranty.
P.O. Box 410 Schofield, WI 54476
Phone: 800.333.1400 • Fax: 715.241.6191
Parts: 800.355.5354 • accurex.com
12 474737 • XRUD and XRUB, Rev. 11, November 2018
CAUSE
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 7, Figures 14 and 15. 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 8, Figures 17a and 17b.
Align and tighten. See "Pre-Starting Checks", pages 7 and 8.
Remove objects, check for damage or unbalance.
Secure properly.
Tighten fasteners to secure the motor hood.
Replace motor with same frame size, RPM-HP
Check rotation of wheel, see page 7, Figure 13. 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 pulleys 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 pages 7 and 8.
Contact power company.
Check motor wiring, see page 4, Figure 6. Confirm wheel rotation, see page 7, Figure 13.
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 see page 7, Figure 13.
Clean wheel, see page 7.
Center wheel on inlet, see "Pre-Starting Checks".
Inspect and repair.
Clean or replace.
Replace and adjust tension.
Check for correct drives.
AVERTISSEMENT
Avant d'entreprendre toute action corrective, s'assurer
que l'appareil ne pourra pas fonctionner durant les
réparations.
CORRECTIVE ACTION
2018 © Accurex, LLC