Greenheck Fan Complete Greenheck Troubleshooting Guide for Optimal APEX-200 Performance
Page 27

Troubleshooting

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.

 

 

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

less than anticipated. Voltage

transformer which is sized for the actual supply power.

Not Pull In

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 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 16.

Low Airflow (cfm)

backwards.

 

 

 

 

Dirty filter or energy wheel.

Follow cleaning procedures on pages 20 and 23.

 

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.

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.

27®

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Contents INSTALLATION, OPERATION, & Maintenance Manual Storage Table of ContentsInstallation Basic Unit OperationLifting Unit Weights dry weights Recommended Roof OpeningsRoof Curb Mounting Rail Mounting WeatherhoodsDampers Typical Control Center Components Electrical ConnectionsDimensional Data / Access Door Descriptions Service Clearances / Access LocationsCoil Application Recommendations Water CoilsDirect Expansion DX Coils See page 13 for VFD on energy recovery wheel Drain Pan TrapsVariable Frequency Drive for Fans E7 Series by Yaskawa Testing refer to Figure TestingFrost Control Application/Operation Modulating the Wheel Optional Accessories Remote Control Panel Unit Start-Up Pre-Start Check ListSpecial Tools Required Supply Fan Plenum Type Exhaust Fans Forward Curved TypeFan Performance Modifications Fan RPM Belt Drive InstallationFan Belt Drives Direction of Fan Wheel RotationVibration Energy Recovery WheelRoutine Maintenance LubricationFan Belts Motors Wheel & FastenersBearings External Filter Maintenance Internal Filter MaintenanceDoor Seal Maintenance Winterizing Coils Coil MaintenanceAccessing Energy Recovery Wheel Cleaning Energy Recovery Wheel Segments Model Apex Parts ListWinter Operation Sequence of OperationBasic Unit Summer OperationTest and Balance Report Troubleshooting AirflowSymptom Possible Cause Corrective Action TroubleshootingGreenheck

APEX-200 specifications

The Greenheck Fan APEX-200 is a cutting-edge ventilation solution designed to meet the demands of modern commercial and industrial applications. Engineered with the latest technologies and featuring advanced design characteristics, the APEX-200 stands out for its efficiency, durability, and performance.

One of the prominent features of the APEX-200 is its energy-efficient operation. The unit is equipped with high-efficiency motors that not only reduce energy consumption but also provide optimal airflow, making it an ideal choice for organizations looking to lower their operational costs while maintaining superior performance. The APEX-200’s ability to operate at low sound levels adds to its appeal, allowing it to be installed in noise-sensitive environments without disturbing occupants.

The APEX-200 incorporates Greenheck's patented Aerodynamic Technology, which enhances airflow and minimizes turbulence. This technology ensures that the fan operates smoothly and efficiently, contributing to the overall effectiveness of the ventilation system. The innovative design of the fan blade and housing also plays a crucial role in maximizing performance while minimizing energy loss.

Durability is a key characteristic of the APEX-200. Constructed from high-quality materials, this fan is designed to withstand the rigors of demanding environments. The unit is also built to resist corrosion, ensuring longevity and reducing maintenance needs. This durability makes the APEX-200 suitable for a variety of applications, including manufacturing facilities, warehouses, and commercial kitchens.

Another significant aspect of the APEX-200 is its versatility. The fan is available in various sizes and configurations, allowing it to be tailored to specific project requirements. This flexibility makes it suitable for different airflow and pressure needs, ensuring optimal performance in diverse settings.

The APEX-200 also features advanced controls and monitoring capabilities. These systems can be integrated with building management systems to provide real-time data and insights into operational performance. Such features enhance user convenience and help facility managers optimize energy usage.

In conclusion, the Greenheck Fan APEX-200 is a sophisticated, reliable, and efficient solution for modern ventilation requirements. Its advanced technologies, high-efficiency operation, and durable construction make it an excellent choice for a wide range of applications, ensuring that it not only meets but exceeds the expectations of users in various industries.
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