What does York chiller fault code 47 mean?

Fault code 47 on York YVAA chillers indicates a high motor temperature on one of the compressor motors. Check motor winding temperatures via the OptiView control panel, verify motor cooling (refrigerant injection for Turbocor compressors), check motor current balance across phases, and inspect the motor temperature sensor wiring for accuracy.

How do I access the York OptiView control panel fault log?

On the York OptiView control panel, navigate to Setpoints > History > Fault History. The fault log shows the last 50 fault events with timestamps and all sensor readings at the time of trip. Use the export function (USB or ethernet) to save fault history for analysis by York service engineering if escalation is required.

What does York chiller fault code 15 indicate?

Fault code 15 on York YVAA and YVAJ chillers indicates low evaporator refrigerant pressure, approaching the freeze protection threshold. Check refrigerant charge (weigh-in if necessary), verify chilled water flow rate meets the minimum specified in the IOM, and inspect the evaporator for fouling. The UC800 controller will reduce or stop capacity before allowing an evaporator freeze trip.

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Common York Error Codes

High motor temperature — check cooling and current balance

Low evaporator refrigerant pressure — check charge and flow

High condenser pressure — check condenser and cooling tower

Oil pressure fault — check oil system

Frequently Asked Questions — York

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