Troubleshooting; Warranty - Greenheck ERV-251 Installation, Operation And Maintenance Manual

TROUBLE SHOOTING
PROBLEM
Unit is NOT
Operating
Excessive
Noise
Low
Airflow (cfm)
High
Airflow (cfm)
One or Both Blowers
Turn Off
Energy Wheel
Does NOT Turn
Energy Wheel Runs
Intermittently
* Always provide the unit model and serial number when requesting parts or service information. * Always check motor amps and compare to nameplate rating.
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the
purchase date. The energy recovery wheel is warranted to be free from defects in material and workmanship for a period of
five years from the purchase date. Any units or parts which prove defective during the warranty period will be replaced at
our option when returned to our factory, transportation prepaid.
Motors are warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck prove
defective during this period, they should be returned to the nearest authorized motor service station. Greenheck will not be
responsible for any removal or installation costs.
Due to continuing product development, Greenheck has the right to change specifications without notice
Copyright © 2000 Greenheck Fan Corp.
POSSIBLE CAUSE
Electrical
Drive
Motor
Fan Wheel Rubbing on Inlet
Bearings
Belts
Wheel Out of Balance
Blower Fan Speed too Low
Fan wheels are operating
backwards.
Dirty filters or energy wheel
High Static Pressure
Blower Fan Speed too High
Low Static Pressure
Blower fan motor overloads are
tripping
Exhaust Only or On/Off frost
control sensors are tripping
Air seals too tight
"Economizer" temperature
sensors are operating
No power to wheel motor
Wheel Drive Belt
Wheel motor overloads are
tripping, due to rubbing
between wheel and air seals
CORRECTIVE ACTION
Check fuses/circuit breakers, replace if needed. Check for On/Off
switches. Check for correct supply voltage.
Check for broken or loose belts. Tighten loose pulleys.
Check that the motor hp 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.
Tighten sheaves on motor/fan shaft. Adjust belt tension. Align
sheaves properly (see page 14). Replace worn belts or sheaves.
Replace or rebalance.
Check for correct drives and rpm's with catalog data.
For 3 phase see Fan Wheel Rotation on page 13.
Check blower rotation.
Follow cleaning procedures on page 17.
Incorrect fan-to-duct connections. Make sure dampers open
appropriately. Increase fan speed.
Check for correct fan rpm.
Make sure grilles, filters, and access doors are installed. Decrease
fan speed.
Decrease fan speed.
Adjust frost temperature sensor set point as needed.
See Energy Recovery Wheel on page 12.
Adjust temperature or enthalpy set points as needed.
Make sure wheel drive is plugged in. Verify power is available.
Check for loose or broken belts. Replace belts (consult factory).
Recheck air seals, make sure they are not to tight. See Energy
Recovery Wheel on page 12.

Warranty

IOM ERV - FS
Rev 4 September 2000