Troubleshooting - Greenheck MiniCore 5 Installation, Operation And Maintenance Manual

Troubleshooting

Symptom
Electrical
Unit is NOT
operating
Motor
Fan wheel rubbing on inlet
Excessive noise
Bearings
Wheel out of balance
Fan speed too low
Dirty filters or energy core
Low airflow (cfm)
High static pressure
Fan speed too high
High airflow (cfm)
Low static pressure
Always provide the unit model and serial number when requesting parts or service information. Always check
motor amps and compare to nameplate rating.
®
Possible Cause Corrective Action
Check fuses/circuit breakers, replace if needed. Check for On/
Off switches. Check for correct supply voltage.
Check motor horsepower is correct and not tripping overloads.
Adjust wheel and/or inlet cone. Tighten wheel hub or bearing
collars on shaft.
Replace defective bearing(s). Lubricate bearings. Tighten collars
and fasteners.
Clean, replace or rebalance.
Increase fan speed.
Replace filters and/or follow the cleaning procedures.
Incorrect fan-to-duct connections. Make sure dampers open
appropriately. Increase fan speed
Decrease fan speed.
Make sure grilles, filters and access doors are installed.
Decrease fan speed.
MiniCore 11