Allied Air Enterprises 4HP16LT instruction

Defrost Control Board Diagnostic LEDs

506468-01

Issue 1004

Page 21

Image 21

Allied Air Enterprises 4HP16LT manual Defrost Control Board Diagnostic LEDs

Contents

4HP16LT Series Torque Table Installation ClearancesGeneral Fastener Torque Slab Mounting Electrical WiringSlab Mounting Roof Mounting Thermostat 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 Runs R22 refrigerant will be used to flush the system Flushing Existing Line Set and Indoor Coil Flushing 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 Valve Evacuation Refrigerant Charge Adjustment Ambient temperatureRefrigerant Charging Cooling Cycle Charge Using Weigh-In Method Blocking Outdoor Coil R410A Temperature/Pressure Chart Normal Operating Pressures Approach Values for TXV Systems Check Charge Using Normal Operating Pressures Filter Drier Operation Sensor Temp. / Resistance Range Defrost Board Pressure Switch Connections Delay Mode Issue Defrost Control Board Diagnostic LEDs Interpreting the Diagnostic LEDs System Diagnostic ModuleFlash Codes LED Description Short Cycling 24VAC Power Wiring Miswired 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 Operation Single Stage Wire Diagram Two Stage Wire Diagram