Trouble Shooting
Symptom | Possible Cause | Corrective Action | |
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One or Both | Blower fan motor overloads are | Decrease fan speed. | |
Blowers Turn Off | tripping and |
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Intermittently and | Exhaust Only frost control | Adjust frost temperature sensor set point as needed. | |
Back on After | |||
sensors are tripping. |
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About 2 Minutes |
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| Air seals are too tight. | See Energy Recovery Wheel on page 12 | |
| “Economizer” sensors are | Adjust temperature or enthalpy set points as needed. | |
Energy Wheel | operating. |
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Does NOT Turn | No power to wheel motor. | Make sure wheel drive is plugged in. Verify power is | |
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| available. | |
| Wheel drive belt | Check for loose or broken belts. Replace belts (consult | |
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| factory). | |
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Energy Wheel | Wheel motor overloads are | Recheck air seals, make sure they are not too tight. See | |
tripping, due to rubbing | Energy Recovery Wheel on page 12. | ||
Runs Intermittently | |||
between wheel and air seals. |
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| Fan wheel rubbing on inlet | Adjust wheel and/or inlet cone. Tighten wheel hub or bearing | |
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| collars on shaft. | |
| Bearings. | Replace defective bearings (s). Lubricate bearings. Tighten | |
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| collars and fasteners. | |
| Wheel out of balance. | Replace or rebalance. | |
| Loose wheel on shaft. | Tighten wheel setscrew. | |
| Loose motor or blower sheave. | Tighten sheave setscrew. | |
Excessive Noise or | Belts too loose. | Adjust belt tension after 24 hours of operation. | |
Vibration | Belts too tight. | Loosen to maintain a 3/8 inch deflection per foot of span | |
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| between sheaves. | |
| Worn belt. | Replace. | |
| Motor base or blower loose. | Tighten mounting bolts. | |
| Build up of material on wheel. | Clean wheel and housing. | |
| Bearing and drive misaligned. | Realign. | |
| Noise being transmitted by | Make sure duct work is supported properly. Make sure duct | |
| duct. | work metal thickness is sized for proper stiffness. Check duct | |
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| size at discharge to ensure that air velocities are not too high. |
* Always provide the unit model and serial number when requesting parts or service information. * Always check motor amps and compare to nameplate rating.
Warranty
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
GREENHECK
Copyright © 2002 Greenheck Fan Corp. | P.O. BOX 410 SCHOFIELD, WISCONSIN | IOM ERH FS |
® | PH. | Rev. 1 January 2002 |
www.greenheck.com |
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