Troubleshooting - York YAST026 Installation Manual

Troubleshooting

Aurora Control System
NOTE: Refer to the Aurora Base Control Application and
Troubleshooting Guide and the Instruction Guide: Aurora Interface
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 the R
terminal to simulate a thermostat signal.
3. If control functions properly:
• Check for thermostat and field control wiring (use
the diagnostic inputs mode).
4. If control responds improperly:
• Ensure that component being controlled is functioning
(compressor, blower, reversing valve, etc.).
• Ensure that wiring from control to the component
is correct.
• Refer to the Aurora Base Control Application and
Troubleshooting Guide and the Instruction Guide:
Aurora Interface and Diagnostics (AID) Tool for
additional information.
AFFINITY DUAL-CAPACITY OUTDOOR SPLIT SERIES INSTALLATION MANUAL
Refrigerant Systems
To maintain sealed circuit integrity, do not install service gauges
unless unit operation appears abnormal. Compare the change in
temperature on the air side as well as the water side to the Unit
Operating Parameters tables. If the unit's performance is not
within the ranges listed, and the airflow and water flow are known
to be correct, gauges should then be installed and superheat and
subcooling numbers calculated. If superheat and subcooling are
outside recommended ranges, an adjustment to the refrigerant
charge may be necessary.
NOTE: Refrigerant tests must be made with hot water generator
turned "OFF". Verify that air and water flow rates are at proper levels
before servicing the refrigerant circuit.
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