Allied Air Enterprises 4HP16LT manual Defrost Control Board Diagnostic LEDs

Page 21

Defrost Control Board Diagnostic LEDs

506468-01

Issue 1004

Page 21

Image 21

Contents 4HP16LT Series Torque Table Installation ClearancesGeneral Fastener TorqueSlab Mounting Electrical WiringSlab Mounting Roof MountingThermostat Designations Without Auxiliary HeatWith Auxiliary Heat Outside Unit Placement Installation Installing Refrigerant LineBrazing Connection Procedure Refrigerant Line Sets Transition from Vertical to Horizontal Refrigerant Line Sets Installing Horizontal RunsR22 refrigerant will be used to flush the system Flushing Existing Line Set and Indoor CoilFlushing Connections Liquid and Suction Line Service Valves Refrigerant Metering DeviceManifold Gauge Set Ball Type Service Valve Valve Open Service ValveTo Open Liquid or Suction Line Service Valve To Close Liquid or Suction Line Service ValveEvacuation Refrigerant Charge Adjustment Ambient temperatureRefrigerant Charging Cooling Cycle Charge Using Weigh-In MethodBlocking Outdoor Coil R410A Temperature/Pressure ChartNormal Operating Pressures Approach Values for TXV Systems Check Charge Using Normal Operating PressuresFilter Drier Operation Sensor Temp. / Resistance Range Defrost Board Pressure Switch ConnectionsDelay Mode Issue Defrost Control Board Diagnostic LEDs Interpreting the Diagnostic LEDs System Diagnostic ModuleFlash Codes LED DescriptionShort Cycling 24VAC Power WiringMiswired Module Troubleshooting Thermostat Demand WiringMiswired Module Codes Maintenance Case of extended power outage Heat Pump OperationThermostat Operation Preservice Check Cooling Start-Up and Performance ChecklistHeating Sequence of OperationSingle Stage Wire Diagram Two Stage Wire Diagram