Johnson Controls York OptiView YK G Series

Questions and Answers

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joneslindaAug 16, 2025
Why is the discharge pressure abnormally high in my Johnson Controls York OptiView YK G Chiller?
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  rebecca31Aug 16, 2025
  If the discharge pressure of your Johnson Controls Chiller is abnormally high, it could be due to several reasons. One potential cause is dirty or scaled condenser tubes. To address this, clean the condenser tubes and inspect water conditioning. Another cause is high condenser water temperature, so reduce the condenser water inlet temperature, checking the cooling tower and water circulation. Also, ensure there is sufficient condensing water flow by increasing the quantity of water through the condenser to the correct value.
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Brian MartinezAug 19, 2025
Why is the suction pressure abnormally low in my Johnson Controls York OptiView YK G?
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  Shawn MooreAug 19, 2025
  If your Johnson Controls Chiller has abnormally low suction pressure, it may be due to an insufficient charge of refrigerant. Check for leaks and charge refrigerant into the system. It could also be a variable orifice problem, so remove any obstruction. Another cause can be dirty or restricted evaporator tubes, so clean them. Finally, check the pre-rotation vane motor operation and the setting of the low water temperature cutout, as there may be insufficient load for the system capacity.
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Gary McfarlandAug 22, 2025
Why does the oil pressure gradually decrease in my Johnson Controls Chiller?
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  Jeffrey KruegerAug 22, 2025
  If you observe oil pressure gradually decreasing in your Johnson Controls Chiller (Noted by Observation of Daily Log Sheets), it is likely that the oil filter is dirty. To resolve this, change the oil filter.
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Frances NelsonAug 26, 2025
What to do if the chilled water temperature is high in my Johnson Controls Chiller?
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  Jeffrey Molina DDSAug 26, 2025
  If your Johnson Controls Chiller has a high chilled water temperature, it could be caused by pre-rotation vanes failing to open. Check the pre-rotation vane motor positioning circuit. Another potential cause is system overload. Ensure the vanes are wide open (without overloading the motor) until the load decreases.
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jessicaperkinsAug 28, 2025
Why does the oil pump vibrate or is noisy in my Johnson Controls York OptiView YK G Chiller?
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  Tracy CollinsAug 28, 2025
  If the oil pump vibrates or is noisy in your Johnson Controls Chiller, it might be due to insufficient oil reaching the pump suction inlet. Check the oil level. Alternatively, the oil pump may be worn or failed, requiring repair or replacement.
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kristenharrisonAug 31, 2025
What to do if oil refrigerant return is not functioning in Johnson Controls York OptiView YK G?
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  tgonzalesAug 31, 2025
  If the oil refrigerant return is not functioning in your Johnson Controls Chiller, the filter-drier in the oil return system may be dirty. Replace the old filter-drier with a new one. Another cause could be a clogged jet or orifice of the oil return jet. Remove the jet, inspect it for dirt, remove the dirt using a solvent, and then replace the jet.
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Mr. Marcus FisherSep 3, 2025
What to do if oil pump fails to deliver oil pressure in Johnson Controls York OptiView YK G?
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  gary22Sep 3, 2025
  If your Johnson Controls Chiller's oil pump fails to deliver oil pressure, it could be due to a faulty oil pressure transducer or faulty wiring/connectors. Replace the oil pressure transducer to resolve this issue.
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Johnny StanleySep 6, 2025
What to do if there is no oil pressure when SYSTEM START button pressed in Johnson Controls York OptiView YK G?
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  yhernandezSep 6, 2025
  If the oil pump in your Johnson Controls Chiller is running but there is no oil pressure when the SYSTEM START button is pressed, it could be due to the oil pump running in the wrong direction. Check the rotation of the oil pump (refer to the Electrical Connections). Another potential cause is that the oil pump is not running at all, so troubleshoot the electrical problem with the oil pump VSD.
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Brian SotoSep 9, 2025
Why is there reduced oil pump capacity in my Johnson Controls York OptiView YK G Chiller?
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  catherine53Sep 9, 2025
  If the oil pump capacity is reduced in your Johnson Controls Chiller, it may be due to excessive end clearance in the pump or other worn pump parts. Inspect and replace any worn parts. Another possible cause is a partially blocked oil supply inlet, so check the oil inlet for any blockage.
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Brian MaySep 12, 2025
Why does unusually high oil pressure develops when oil pump runs in Johnson Controls York OptiView YK G?
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  Brendan TorresSep 12, 2025
  If unusually high oil pressure develops when the oil pump runs in your Johnson Controls Chiller, the high oil pressure transducer may be defective. Replace the low or high oil pressure transducer.

Johnson Controls York OptiView YK G Series Specifications

General

Refrigerant	R-134a
Efficiency	High Efficiency
Control System	OptiView Control Center
Frequency	50/60 Hz
Type	Centrifugal Chiller
Compressor Type	Centrifugal
Leaving Water Temperature Range	40°F to 65°F (4.4°C to 18.3°C)
Model	OptiView YK G Series