Trouble Shooting

Symptom	Possible Cause	Corrective Action

	Blown fuse or open circuit	Replace fuse or reset circuit breaker and check amps.
	breaker.
Blower Fails to	Defective motor or capacitor.	Replace
Blower Fails to
Operate	Motor starter overloaded.	Reset starter and check amps.
	Electrical.	Check for On/Off switches. Check for correct supply voltage.
	Drive.	Check for broken or loose belts. Tighten loose pulleys.

	Control power (24 Vac) wiring	Shorten wiring run to mechanical room or install a relay
	run is too long (resistance	which will turn unit on/off (C/F for relay information).
	should not exceed 0.75 ohms).
Motor Starters	Incoming supply power is	Need to increase supply power or use a special control
“Chatter” or Do	Incoming supply power is	Need to increase supply power or use a special control
“Chatter” or Do	less than anticipated. Voltage	transformer which is sized for the actual supply power.
Not Pull In	less than anticipated. Voltage	transformer which is sized for the actual supply power.
Not Pull In	supplied to starter coil must
	supplied to starter coil must
	be within +10% / -15% of
	nominal voltage stated on
	the coil.

	Cfm too high.	Check cfm and adjust drives if needed.
	Static pressures are higher or	If higher, ductwork should be improved.
	lower than design.	If lower, fan rpm should be lower.
Motor Over Amps	Blower rotation is incorrect.	Check rotation and reverse if necessary.
Motor Over Amps
	Motor voltage incorrect.	Check motor nameplate versus supplied voltage.
	Motor horsepower too low.	See specifications and catalog for fan curves to determine if
		horsepower is sufficient.
	Shorted windings in motor.	Replace motor.

	Unit damper not fully open.	Adjust damper linkage or replace damper motor.
	System static pressure too high	Improve ductwork to eliminate losses using good duct
		practices.
	Blower speed too low.	Check for correct drives and rpm with catalog data.
	Fan wheels are operating	For 3-phase see Fan Wheel Rotation on page 15.
Low Airflow (cfm)	backwards.
Low Airflow (cfm)
	Dirty filter or energy wheel.	Follow cleaning procedures on pages 18 and 21.
	Leaks in ductwork.	Repair.
	Elbows or other obstructions	Correct or improve ductwork.
	may be obstructing fan outlet.
	Belt slippage.	Adjust belt tension.

	Blower fan speed too high.	Check for correct fan rpm. Decrease fan speed if necessary.
High Airflow (cfm)	Filter(s) not in place.	Install filters.
High Airflow (cfm)	Insufficient static pressure (Ps)	Induce Ps into system ductwork. Make sure grilles and
	Insufficient static pressure (Ps)	Induce Ps into system ductwork. Make sure grilles and
	(airflow resistance).	access doors are installed. Decrease fan speed if necessary.

* Always provide the unit model and serial number when requesting parts or service information. * Always check motor amps and compare to nameplate rating.

HRE-55, HRE-45, HRE-90, HRE-20 specifications

The Greenheck Fan HRE series, specifically the models HRE-20, HRE-90, HRE-55, and HRE-45, represents a blend of innovation and efficiency in the HVAC industry. Built for both commercial and industrial applications, these exhaust fans stand out due to their robust design and advanced operational features.

One of the main features of the HRE series is its energy-efficient motor design. These fans come equipped with a premium efficiency motor that reduces energy consumption while maintaining high performance. The motors are specifically designed to provide exceptional airflow while operating at lower sound levels, ensuring a quieter environment.

The HRE models also showcase advanced aerodynamic design, featuring optimized blade geometry that enhances airflow performance. This design ensures that the fans can deliver consistent and effective air movement even at varying operational conditions. This makes the HRE series suitable for use in a wide range of applications, from commercial kitchens to industrial processes.

Another significant characteristic of the HRE series is its durability. Constructed from high-quality materials, these fans are built to withstand harsh environmental conditions and prolonged usage. The robust casing and corrosion-resistant finishes ensure longevity, reducing the need for frequent repairs or replacements.

In terms of installation and maintenance, the HRE series offers significant advantages. The fans are designed for easy installation with clear mounting instructions. Additionally, maintenance procedures are simplified, allowing for hassle-free access to critical components, which reduces downtime and operating costs.

Technologically, the HRE models incorporate advanced controls and monitoring systems. These systems can offer real-time feedback on operational performance, allowing for proactive maintenance and energy management. Integrated controls can be customized to work with building management systems, providing users with seamless integration and control capabilities.

Overall, the Greenheck Fan HRE-20, HRE-90, HRE-55, and HRE-45 exemplify a commitment to quality and efficiency in commercial and industrial ventilation solutions. Their combination of energy efficiency, advanced design, durability, and user-friendly features make them a leading choice for those seeking reliable airflow solutions. These fans not only meet current industry standards but also set a benchmark for performance and innovation in the HVAC sector.

Trouble Shooting

Symptom

Possible Cause

Corrective Action

HRE-55, HRE-45, HRE-90, HRE-20 specifications