Troubleshooting - Greenheck SQ Installation, Operation And Maintenance Manual

Troubleshooting

WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
PROBLEM CAUSE
Wheel unbalance
Excessive noise Wheel improperly aligned and
or vibration rubbing
Foreign objects in wheel or
housing
System resistance too high
Unit running backwards
Reduced airflow
Excessive dirt buildup on wheel
Improper wheel alignment
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For Vari-Green motor troubleshooting, refer to the Vari-Green Motor Installation, Operation and Maintenance
Manual.
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AVERTISSEMENT
Avant d'entreprendre toute action corrective, s'assurer
que l'appareil ne pourra pas fonctionner durant les
réparations.
CORRECTIVE ACTION
Clean all dirt off wheel. Check wheel balance, rebalance in
place if necessary.
Center wheel on inlet, see Figure 3.
Remove objects, check for damage or unbalance.
Check system: Proper operation of backdraft or control
dampers, obstruction in ductwork, clean dirty filters.
Correct. See Wheel Rotation on page 4.
Clean wheel.
Center wheel on inlet, see Pre Start-Up Checks and Figure 3.
Square Mixed Flow Inline Fans 5