York YGWH 145 - User Manual

Questions and Answers

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Steven HamiltonAug 8, 2025
How to troubleshoot low evaporator pressure in a York YGWH 145 Chiller?
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  laurengillAug 8, 2025
  Low evaporator pressure in a York Chiller can be caused by several factors. The transducer might be reading incorrectly, so check it against a gauge. A defective chilled water temperature sensor, insufficient refrigerant charge (check for leaks and charge refrigerant into system), or low evaporator water flow (check flow) could also be responsible. Other potential causes include a liquid line filter clog (check liquid line filter), a defective feed or flow valve (repair or replace valve or control), dirty or restricted evaporator tubes (clean evaporator tubes), EEV failure or failure to open (check EEV or EEV drive), or insufficient load for system capacity (check low water temperature cutout setting and low evaporator pressure cutout setting).
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kim95Aug 13, 2025
What to do if the leaving chilled liquid temperature is low on my York YGWH 145?
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  alvarezryanAug 13, 2025
  A low leaving chilled liquid temperature in a York Chiller can occur if the leaving chilled liquid temperature drops faster than the unit can unload. In such cases, check for restricted flow. Another possible cause is a defective chilled water sensor, so check the sensor against a temperature gauge in the water line. Also check the sensor for intermittent operation and check wiring for short or open circuits.
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Douglas StokesAug 17, 2025
What to do if there is no display on the York YGWH 145 control panel and the unit will not run?
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  acostamichaelAug 17, 2025
  If there is no display on the York Chiller control panel and the unit won't run, the electric supply to the panel might be missing, meaning high voltage to the chiller is absent. Also, check the fuses, as a blown line fuse could be the cause. If the power supply and fuses are fine, the control board or display board might be defective, requiring replacement.
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Kimberly JamesAug 23, 2025
Why is the discharge pressure high in my York YGWH 145 Chiller?
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  Joshua Saunders MDAug 23, 2025
  High discharge pressure in a York Chiller can stem from several causes. The condenser water temperature may be too high, so check the sensor. The discharge transducer or high-pressure switch might be defective. The condenser water could be dirty, or the condenser water flow could be low, so it's important to check the condenser water flow and distribution. Non-condensable gas in the chiller or overcharged refrigerant can also cause this issue; in the latter case, recover refrigerant and maintain discharge superheat in the range of 7 to 10°C and evaporator small temperature in 0.5 to 2.5°C.
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lrobinsonAug 28, 2025
Why is the discharge temperature high on my York YGWH 145 Chiller?
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  Matthew WhitneyAug 28, 2025
  High discharge temperature in a York Chiller can be attributed to several reasons. A defective discharge temperature sensor could be the cause, so check the sensor. Dirty or scaled condenser tubes (check and clean tubes, and check water conditioning) or low condenser water flow (check site pumps, valves, and strainers and increase the quantity of water through the condenser to the proper value) can also lead to this issue. Additionally, if the condenser water is too warm, check the tower fan motor/blade, valve, and water circulation.
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Sara SmithSep 1, 2025
What causes low oil level in a York Chiller?
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  Rachael ForbesSep 1, 2025
  A low oil level in a York Chiller can be caused by several factors. It could be due to oil heater failure (check oil heater), oil level switch failure (check oil level switch), low condenser water temperature (adjust condenser water flow, increase condenser leaving water temperature), or an oil filter clog (check oil filter). Additionally, an overcharge of refrigerant (recover refrigerant and keep discharge superheat in 7 to 10°C, evaporator small temperature in 0.5 to 2.5°C), eductor failure or oil filter clog (repair or replace Eductor or filter), or insufficient oil charge (increasing oil charge) can also contribute to this issue.