York MILLENNIUM YCAR0315

Questions and Answers

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greenshellyAug 12, 2025
How to troubleshoot a York MILLENNIUM YCAR0315 Chiller with no display on the panel?
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  Peggy FigueroaAug 12, 2025
  If there is no display on the panel and the York Chiller unit won't start, possible causes include: the main supply to the control system being OFF (switch it on if safe), an emergency stop device being off (check and turn it ON if safe), a tripped undervoltage relay (check the mains supply), no supply to -2T (check emergency stop switch fuses), no 24VAC supply to the power board (check wiring from -2T to the power board and CB3), or no +12V output from the power board (replace the power board or isolate excessive load).
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Leah TranAug 15, 2025
What to do if my York MILLENNIUM YCAR0315 Chiller displays a 'LOW LIQUID TEMP' fault?
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  Meghan WoodardAug 16, 2025
  If the York Chiller displays a 'LOW LIQUID TEMP' fault, it could be due to several reasons: the leaving liquid temperature dropping below the programmed low limit faster than the unit can unload (check for restrictions in the liquid flow line and ensure stable liquid flow), the unit not unloading (check the supply to the unloader valve solenoid and verify the compressor unloads correctly), or an incorrect temperature measurement (check sensor calibration, location, and wiring).
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Chelsea MedinaAug 20, 2025
Why does my York MILLENNIUM YCAR0315 say 'NO RUN PERM'?
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  Erica JohnsonAug 20, 2025
  If the York Chiller displays 'NO RUN PERM', it indicates a 'No run permissive' status. This could be due to a lack of liquid flow through the cooler (ensure liquid pumps are running and valves are correctly set) or flow switch contacts not being made (check the flow switch's functionality and installation). Note that on some systems the pump starter may be wired to the unit and controlled to start by the unit.
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Donald WeaverAug 23, 2025
What causes a 'HIGH AMBIENT TEMP' fault on a York MILLENNIUM YCAR0315?
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  Daniel HamiltonAug 25, 2025
  If the York Chiller displays a 'HIGH AMBIENT TEMP' fault, it may be because the ambient air temperature is higher than the programmed operating limit (use the 'ambient temp' key to check the temperature; the message should clear when the temperature falls below the limit), residual heat isn't being dissipated (check the fan's operation and airflow), or the measured temperature is incorrect (check sensor calibration, location, and wiring).
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Monique VillegasAug 27, 2025
Why is my York MILLENNIUM YCAR0315 Chiller showing a 'LOW AMBIENT TEMP' fault?
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  lopezbarryAug 27, 2025
  If your York Chiller displays a 'LOW AMBIENT TEMP' fault, it could be because the ambient air temperature is lower than the programmed operating limit (use the 'ambient temp.' key to display the temperature and confirm its accuracy; the warning should clear when the temperature rises above the limit) or because the measured temperature is incorrect (check sensor calibration, location, and wiring).
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Thomas Smith MDAug 31, 2025
How to fix a 'LOW OIL TEMP' error on a York MILLENNIUM YCAR0315?
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  brandtsherryAug 31, 2025
  If the York Chiller displays 'SYS # LOW OIL TEMP', it could be due to refrigerant in the oil (allow compressor heaters to remain on to boil the refrigerant out) or an incorrect temperature measurement (check sensor calibration and wiring).
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Kayla YoungSep 4, 2025
What does 'VAC UNDERVOLTAGE' mean on my York MILLENNIUM YCAR0315?
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  mjohnsonSep 4, 2025
  If the York Chiller displays a 'VAC UNDERVOLTAGE' fault, it is likely due to a poor mains supply voltage. You should check that the mains supply is stable and within allowable limits, and also check for any voltage dips when the compressor starts.
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Paul PaulSep 7, 2025
What to do if my York Chiller displays 'PUMPDOWN FAIL' error?
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  sean32Sep 7, 2025
  If the York Chiller displays a 'PUMPDOWN FAIL' fault, it could be caused by a leaking liquid line solenoid valve (replace the solenoid valves) or issues with the compressor valves (perform a top head overhaul).