Troubleshooting

Symptom	Possible Cause	Corrective Action

	Blown fuse or open circuit breaker	Replace fuse or reset circuit breaker and check amps

Blower fails to	Broken fan belt	Replace
operate	Defective motor or capacitor	Replace
	Defective motor or capacitor	Replace

	Motor starter overloaded	Reset starter and check amps

	Airflow too high	Check airflow and adjust drives if needed

	Static pressures are higher or lower	If higher, ductwork should be improved
	than design	If lower, fan RPMs should be lower

Motor overamps	Blower rotation is incorrect	Check rotation and correct

	Motor voltage incorrect	Check motor nameplate and supplied voltage
	Motor voltage incorrect	Check motor nameplate and supplied voltage

	Motor horsepower too low	See specifications and catalog for fan curves to determine
	Motor horsepower too low	if horsepower is sufficient
		if horsepower is sufficient

	Shorted windings in motor	Replace motor

	Mixing box damper not fully open	Adjust damper linkage or replace damper motor

	System static pressure too high	Improve ductwork to eliminate losses using good duct
	System static pressure too high	practices
		practices

	Blower speed too low	Check for correct drives and RPMs with catalog data

Insufficient airflow	Mixing box dampers closed	Open and adjust

	Dirty or clogged filters	Clean or replace
	Dirty or clogged filters	Clean or replace

	Leaks in ductwork	Repair

	Elbows, or other obstructions may	Correct or improve ductwork
	restrict fan outlet	Correct or improve ductwork

	Belt slippage	Adjust belt tension

	Blower fan speed too high	Check for correct fan RPM

Too much airflow	Filter(s) not in place	Install filters

	Insufficient static pressure	Induce static pressure into system ductwork
	Insufficient static pressure
	(airflow resistance)
	(airflow resistance)

	Wheel rubbing on housing	Center wheel

	Loose wheel on shaft	Tighten wheel setscrew

	Loose motor or blower sheave	Tighten sheave setscrew

	Belts too loose	Adjust belt tension after 24 hours of operation

	Belts too tight	Loosen to maintain 3/8 inch deflection per ft. of span
	Belts too tight	between sheaves
		between sheaves

Excessive noise	Worn belt	Replace


or vibration	Motor base or blower loose	Tighten mountings bolts

	Worn bearings	Replace

	Bearing and drive alignment	Realign

	Motor out of balance	Replace

	Wheel out of balance	Replace or rebalance

	Sheaves eccentric or out-of-balance	Replace or rebalance

	Accumulation of material on wheel	Clean wheel and housing

8 Model LFC Low-Profile Fan Coil

LFC specifications

Greenheck Fan LFC is a prominent player in the realm of ventilation and air movement solutions, known for its innovative approach to fan technology. The LFC series offers a range of features specifically designed to enhance indoor air quality while maintaining energy efficiency. One of the standout aspects of the LFC series is its application in both commercial and industrial settings, providing versatile solutions for various ventilation requirements.

One of the main features of the Greenheck Fan LFC is its direct drive design. This configuration eliminates the need for belts and pulleys, reducing maintenance requirements and increasing reliability. The direct drive system also allows for quieter operation, making it ideal for environments where noise control is critical, such as schools and healthcare facilities. With a wide range of motor options available, users can select the most appropriate solution for their specific airflow and energy consumption needs.

The LFC series is engineered with high-efficiency impellers, which greatly enhance airflow performance while minimizing energy usage. These impellers are designed to optimize air movement, allowing the fans to operate more efficiently across different speed settings. This focus on efficiency is not only beneficial for reducing operational costs but also contributes to sustainability efforts by lowering energy consumption, which is increasingly important in today’s environmentally conscious market.

Moreover, the LFC series features advanced aerodynamic designs that help to streamline airflow, reducing turbulence and improving overall system efficiency. This design innovation leads to better performance in applications requiring precise ventilation control. The fans can be equipped with variable frequency drives (VFDs), enabling dynamic control over fan speed and further enhancing energy efficiency by adapting airflow to real-time demands.

Durability is another hallmark of the Greenheck Fan LFC. Constructed from high-quality materials that resist corrosion and wear, these fans are built to withstand the rigors of harsh environments, ensuring long service life. Additionally, the LFC series can be customized with various coatings and finishes, making them suitable for diverse industrial applications.

In summary, the Greenheck Fan LFC series combines advanced technology with user-centric design. Its key features—such as direct drive systems, high-efficiency impellers, advanced aerodynamics, and robust construction—position it as a leading choice for effective and efficient ventilation solutions. Whether employed in commercial spaces or heavy-duty industrial applications, the LFC fans represent a commitment to quality and performance in air movement technology.

Troubleshooting

Symptom

Possible Cause

Corrective Action

LFC specifications