Greenheck MiniCore (479677) - Manual (Page 11)

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