York YAP026 Installation Manual

York YAP026 Installation Manual Manual pdf 48 page image

48Aurora Control SystemNOTE: Refer to the Aurora Base Control Application andTroubleshooting Guide and the Instruction Guide: AuroraInterface and Diagnostics (AID) Tool for additional information.To check the unit control board for proper operation:1. Disconnect thermostat wires at the control board.2. Jumper the desired test input (Y1, Y2, W, O or G) to theR terminal to simulate a thermostat signal.3. If control functions properly:• Check for thermostat and field control wiring (usethe diagnostic inputs mode).4. If control responds improperly:• Ensure that component being controlled isfunctioning (compressor, blower, reversingvalve, etc.).• Ensure that wiring from control to the componentis correct.• Refer to the Aurora Base Control Application andTroubleshooting Guide and the Instruction Guide:Aurora Interface and Diagnostics (AID) Tool foradditional information.TroubleshootingRefrigerant SystemsTo maintain sealed circuit integrity, do not install servicegauges unless unit operation appears abnormal. Comparethe change in temperature on the air side as well as thewater side to the Unit Operating Parameters tables. If theunit’s performance is not within the ranges listed, and theairflow and water flow are known to be correct, gaugesshould then be installed and superheat and subcoolingnumbers calculated. If superheat and subcooling areoutside recommended ranges, an adjustment to therefrigerant charge may be necessary.AFFINITY SERIES OUTDOOR PACKAGED HEAT PUMP INSTALLATION MANUAL