Greenheck Fan 470656 manual Heat transformer TR2 fault

Page 52

Troubleshooting

4:1 Modulating Furnace Will Not Light

24 VAC across R and X?

Yes

24 VAC across W1 and X?

Yes

24 VAC across 22 and 21?

Yes

N.O. contact on

heat relay (RH) closed?

Yes

DT1 displayed

on furnace controller (SC1)?

No

OT1 displayed

on furnace controller (SC1)?

No

Blank screen

on furnace controller (SC1)?

No

24 VAC across

terminals S and T?

Yes

Continues on next page...

No

No

No

No

Yes

Yes

Yes

No

Main disconnect (DS1) open or defective

Close, repair or replace

Main transformer (TR1) fault

Replace main transformer

Heat switch (S4) open or not wired

Close or replace heat switch (S4)

Heat transformer (TR2) fault

Replace heating transformer

Heat relay (RH) is not energized

Check for loose connections. Repair or replace heat relay (RH)

Discharge air sensor (TS2) not wired or defective

Wire or replace discharge air sensor (TS2)

Outdoor air sensor (TS1) not wired or defective

Wire or replace outdoor temperature sensor (TS1)

Furnace controller (SC1) defective or not powered

Replace or wire furnace controller (SC1)

Discharge temperature was above high limit control (HLC1)

Wait for high limit to cool and reset

Inlet air sensor contact open

Adjust inlet air sensor setting (refer to 4:1 Modulation Start-Up section)

Furnace controller (SC1) defective

Replace furnace controller (SC1)

52 Model IG / IGX Make-Up Air

®

Image 52

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 Exhaust Options Install Exhaust FanInstall Supply Unit Installation of Evaporative Cooling Module optional Installation of Venting for Outdoor UnitsInstallation of Venting for Indoor Units Venting MethodsStandard Indoor Venting Separated Combustion Concentric VentingInstalling Exhaust Vent Pipe Installation of Standard Indoor VentingVent Pipe Diameter 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 ModulationStart-Up 41 Electronic Modulation Exit High Fire ModeCheck the Low Fire Manifold Pressures 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 Check Operation VAV Units optional External Signal a variableBuilding Pressure Control 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 CoolerAdjust the On Time Factor Adjust the Manual Supply ValveWater Wizard Improper Water Supply 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