Greenheck Fan 473501 manual Two hours. Recheck for open circuit

Page 32

Troubleshooting – Refrigeration Circuit

Symptom

Possible Cause

Corrective Action

 

 

 

 

Refrigerant overcharge.

Check pressures, charge by subcooling.

 

 

 

 

Condenser fan motor defective.

Check fan motor.

Compressor starts

 

 

Condenser coil inlet obstructed or dirty.

Check coil and inlet clearances.

but cuts out on high

 

 

 

 

pressure switch

Air or non-condensables in system.

Check high side equalized pressure reading with

 

equivalent outdoor temperature.

 

 

 

 

 

High pressure

Defective high pressure switch.

Replace.

activates at

 

 

 

Check refrigerant line pressures, check thermal

600 PSIG for

Restriction in discharge or liquid line.

R410A

expansion valves.

 

 

 

 

 

Condensing fan relay not pulling in.

Replace.

 

 

 

 

Reheat valve and bypass valve not opening.

Check valves or valve circuit board.

 

 

 

 

Low voltage.

Check voltage.

 

 

 

 

Sustained high discharge pressure.

Check running amperage and conditions described

 

under ‘Low suction pressure’ symptoms.

 

 

 

 

 

 

High suction and discharge pressures.

Check thermal expansion valve setting, check for

 

air in system.

 

 

 

 

 

 

Defective compressor overload.

If compressor is hot, allow compressor to cool for

Compressor cuts out

two hours. Recheck for open circuit.

 

on thermal overload

 

 

Improper refrigerant charge.

Check subcooling.

 

 

 

 

 

Improperly wired.

Review wiring schematics.

 

 

 

 

Loose wiring.

Check all connections and wires.

 

 

 

 

Defective start relay.

Replace relay.

 

 

 

 

Motor windings damaged.

Verify amp draw.

 

 

 

 

Improperly wired.

Review wiring schematics.

 

 

 

 

Low line voltage.

Check voltage.

 

 

 

 

Loose wiring.

Check all connections.

Compressor hums,

 

 

Defective start or run capacitor.

Check run capacitor for compressor and fan motor.

but will not start

 

 

 

Defective relay start.

Replace relay.

 

 

 

 

Motor winding damaged.

Verify amp draws.

 

 

 

 

Internal compressor mechanical damage.

Replace.

 

 

 

Always have a completed Pre Start-Up Checklist and Unit Start-Up Checklist prior to requesting parts or service information.

32 Model ERCH-HP Energy Recovery Unit

Page 31 Page 33
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Page 31 Page 33
Contents General Safety Information Model ERCH-HPInspection and Maintenance during Storage ReceivingUnpacking HandlingTable of Contents Product Overview Models and CapacitiesSubassemblies CoilsHeat Pump Module Location of components in the module will varyUnit Weights and Recommended Roof Opening InstallationDimensional Data Service Clearances ERCH-HP 20 ERCH-HPLifting Lifting LugsSet the Unit Lift Roof Curb Mounting Curb Outside Dimensions and WeightsInstall Ductwork Exhaust Weatherhood Ductwork ConnectionsRail Mounting / Layout Start-Up Unit Voltage Imbalance Pre-Start-Up ChecklistStart-Up Procedure Unit Start-Up Checklist Electrical Information Condensate Drain Trap Discharge Air Temperature SensorPlumbing / Piping Overview Optional Remote Control Panel Wiring SchematicsIndicator Lights powered by the ER Unit Day Timer or On/Off SwitchOptional Control Center Components Optional Frost Control TimerElectrical Controls Variable Frequency Drive VFD Phase MonitorOptional Economizer Optional Rotation Sensor Dirty Filter SensorAdjust the Air Seals Energy WheelSequence of Operation Start-UpEnergy Wheel Maintenance Heat Pump Overview Energy Wheel TroubleshootingFactory-Installed Heat Pump System Components Heat Pump Controls Refrigeration System Schematic Typical Operating Conditions Intelligent Reset Unit Protection Module UPM Fault IndicationsLockout Reset FX05 Furnace Controller Troubleshooting Controller AlarmsDDC Controller Troubleshooting Airflow Troubleshooting UnitDesign Airflow Measured AirflowResistance Troubleshooting Refrigeration Circuit Troubleshooting NoteTwo hours. Recheck for open circuit Check bulb for contact Check entering air wet bulb conditions Worn oil pump Replace the oil pump Routine Maintenance Maintenance FrequencyMaintenance Procedures Lubrication DampersFan Bearings Fan MotorsFan Wheel and Fasteners Coil Maintenance Internal Filter MaintenanceExternal Filter Maintenance Maintenance Log Warranty

473501 specifications

Greenheck Fan 473501 is a significant player in the world of ventilation solutions, specifically designed to meet the increasing demands for efficiency and effectiveness in air movement. This commercial-grade fan is particularly noted for its high performance and reliability, making it a top choice for various applications, ranging from industrial settings to larger commercial spaces.

One of the main features of the Greenheck 473501 is its energy-efficient design. It is engineered to minimize energy consumption while maximizing airflow, allowing users to achieve optimal performance without incurring high utility bills. The fan is equipped with a powerful motor that not only ensures consistent airflow but also contributes to its overall longevity and durability.

The fan boasts an impressive air performance rating, which is crucial for environments that require precise temperature and humidity control. With adjustable airflow settings, users can customize the fan’s operation to suit specific needs, whether that means circulating air in a warehouse or exhaust in a manufacturing facility.

Another standout characteristic is the fan's robust construction. Built with corrosion-resistant materials, the Greenheck 473501 is ideal for use in harsh environments, where exposure to moisture and other elements could compromise lesser fans. The design also incorporates noise-reducing technologies, making it suitable for settings where quiet operation is essential, such as schools, hospitals, and office buildings.

In terms of installation, the Greenheck 473501 is designed for versatility. It can be easily integrated into various ventilation systems, whether for new constructions or upgrades to existing infrastructure. Its compact footprint allows for convenient placement without sacrificing performance.

Furthermore, Greenheck offers extensive support and resources for this model, ensuring users have access to the information necessary for optimal operation, maintenance, and any potential troubleshooting.

Overall, the Greenheck Fan 473501 represents a harmonious blend of efficiency, durability, and flexibility, making it an ideal choice for those seeking a high-quality ventilation solution that meets contemporary environmental standards while delivering reliable performance across diverse applications.
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