Greenheck Fan Troubleshooting Your Greenheck IGX Evaporative Cooler for Optimal Performance

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Troubleshooting

Evaporative Cooler does not Operate (Recirculating pump)

Supply fan must be on for cooler to operate

24 VAC between terminals

Y1 and X

Yes

24 VAC between terminal A2 on

Cooling Relay (RC) and X

Yes

115 VAC between terminals

102 and 101

Yes

115 VAC between terminal

114 and 101

No

No

No

No

Cool switch (S4) off

(turn cool switch (S4) on)

Cool switch not wired

(wire cool switch (S4))

Optional inlet air sensor (TS4) holding

(Adjust TS4 setting. Reference Blower Start-Up – Step #6)

Cooling transformer (TR4) defective

(Replace transformer)

Cooling relay (RC) is not energized

(Check for loose connections)

(Repair or replace relay)

Yes

At this time the evaporative cooler pumps should be on

Water Blows through Evaporative Cooler

Are the headers in place and		No
located near the entering		No
located near the entering
air side of the media?

	Yes
	Yes

Water supply greater than		Yes
evaporation and bleed-off rate?

	No

Air velocity greater than		Yes
specified?
specified?

	No

Replace headers and/or move the headers

Use the main supply valve to reduce the supply of water

Reduce the air velocity through the media

(Reference Blower Start-Up – Step #5)

At this time the evaporative cooler should be operating without water blowing through

56 Model IG / IGX Make-Up Air

®

Image 56

Contents Installation, Operation and Maintenance Manual General Safety InformationInspection and Maintenance during Storage ReceivingHandling StorageTable of Contents Clearance to Combustibles / Service ClearancesInstallation of Indoor Unit Installation of Arrangement DB / HZInstallation of Roof Mounted Unit Arrangement DBC Install Combination Curb AdaptorInstall Curb/Equipment Supports Assemble and Attach WeatherhoodInstall Supply Unit Install Exhaust FanInstall Exhaust Options Installation of Evaporative Cooling Module optional Installation of Venting for Outdoor UnitsInstallation of Venting for Indoor Units Venting MethodsStandard Indoor Venting Separated Combustion Concentric VentingVent Pipe Diameter Installation of Standard Indoor VentingInstalling Exhaust Vent Pipe Installation of Concentric Venting General Concentric Venting HorizontalConcentric Venting Vertical Intake END Installation of Two Pipe Venting Horizontal Seal Wall OpeningsInstallation of Two Pipe Venting Vertical Seal Roof PenetrationInstallation Electrical Wiring Wire the Evaporative Cooler optional Install Economizer Sensors optionalInstall Discharge Air Sensor optional Install DDC Interface OptionalInstallation of Gas Piping Install Additional Regulator if RequiredDetermine the Supply Gas Requirements Connect the Supply Gas LineInstallation Evaporative Cooler Piping optional Install the Water Supply LineInstall the Drain Line Check/Adjust Water LevelInstallation of Water WizardTM optional Install Normally Closed Supply Line/ SolenoidInstall Normally Open Drain Line/ Solenoid Water Wizard Valves When provided by manufacturerInstallation of Water Wizard Installation Direct Expansion DX Coil Piping optionalWire the Solenoids Wire the Temperature SensorInstall Suction Line Mount the Remote Sensing Bulb By OthersCheck Coil Piping for Leaks Evacuate and Charge the CoilInstallation of Chilled Water Coil Piping optional Installation of Building Pressure Control optionalStart-Up Blower Set-up Optional Components Reset the Temperature Setting Start-Up Furnaces all unitsStart-Up Single Stage Control Send Unit to High FireStart-Up 21 Staged Control Start-Up 81 Staged ControlSend Unit to Low Fire Check the Low Fire Manifold PressureAccess the Setpoints Menu Access the Discharge Air Temperature SettingEdit the Setting Access the Inlet Air Sensor SettingAccess the Room Override Setting High Fire Adjustment Start-Up 21 Electronic ModulationCheck the Low Fire Manifold Pressures Exit High Fire ModeStart-Up 41 Electronic Modulation Access the Setpoints Menu Verify Sensor Installation Start-Up Economizer optionalSet Minimum Outside Air Set the Enthalpy Changeover Set Point optionalStart-Up Evaporative Cooling optional Start-Up Water Wizard optional Operation - Water Wizard optional Building Pressure Control External Signal a variableCheck Operation VAV Units optional Check Operation Recirculating Units optional Recirculation OperationBuilding Pressure Control a Damper actuator may take a fewSequence of Operation Staged Sequence Exhaust Fan Contact S1 Manually Closed optionalSequence of Operation 21 Modulation Sequence Discharge Air Temperature dtS Outside Air Temperature OAtSequence of Operation Modulation Sequence Operation Modulation Staged ControllerSequence of Operation 41 Electronic Modulation Program Revision NumberOptional Room Override ROt Light Off BlinkingSequence of Operation Electronic Modulation Sequence of Operation Staged Control Staging Control Sequence of OperationOperation and Errors Ignition Controller Following are the green LED codes of operationOption EC-1 Outside Air Temperature Reference Option EC-3 Differential Temperature ControlOperation Economizer Option EC-2 Outside Air Enthalpy ReferenceTroubleshooting Blower Does Not OperateMotor Over Amps Insufficient Airflow Too Much AirflowExcessive Noise or Vibration Single or 21 Stage Furnace Will Not Light Improper manifold pressureModulating Furnace Will Not Light Heat transformer TR2 fault Ignition controllers IC# failed Staged Furnace Will Not Light Internal high limit tripped temperature above set point Evaporative Cooler does not Operate Recirculating pump Water Blows through Evaporative CoolerWater Wizard Improper Water Supply Adjust the Manual Supply ValveAdjust the On Time Factor Maintenance Routine Belt DrivesSnow Accumulation WheelsMotors FiltersChilled Water Coils Evaporative CoolersMaintenance Fall Flushing Coils Reference Model IG Venting Connection Location Reference Model IGX Venting Connection LocationReference Model IG Single or 2 Stage Reference Model IG Staged Reference Model IG Modulation Modulating Reference Model IGX Blower Control Center Manifold Gas Pressure Test Port Staged Inch Gas Supply Manifold Gas Pressure Test Port Modulating Staged Reference Performance Table Performance TableReference Start-Up Checklist Start-Up ChecklistMaintenance Log Warranty