I have Copeland Sentronic Pump unit I was asked to work on, its showing a red light but I no idea where to start and
![Copeland OPS2 Oil pressure sensor for Refrigeration Compressor - China Copeland Oil pressure sensor, Bitzer Oil pressure sensor | Made-in-China.com Copeland OPS2 Oil pressure sensor for Refrigeration Compressor - China Copeland Oil pressure sensor, Bitzer Oil pressure sensor | Made-in-China.com](https://image.made-in-china.com/2f0j00GHqbeLuWsEkP/Copeland-OPS2-Oil-pressure-sensor-for-Refrigeration-Compressor.jpg)
Copeland OPS2 Oil pressure sensor for Refrigeration Compressor - China Copeland Oil pressure sensor, Bitzer Oil pressure sensor | Made-in-China.com
![Copeland Oil Pressure Switch OPS2 | Oil Pressure Switch OPS2 | OPS2 | 5404652 | 585-0228-00 | 50/60HZ/240V | Replacement | Goldar | Sensor | SEN-2903-1 | 021187000100002 Copeland Oil Pressure Switch OPS2 | Oil Pressure Switch OPS2 | OPS2 | 5404652 | 585-0228-00 | 50/60HZ/240V | Replacement | Goldar | Sensor | SEN-2903-1 | 021187000100002](https://www.advanceworldgroup.com/public/files/products/general-items/sensors/500x500/SEN-2903-1A.webp)
Copeland Oil Pressure Switch OPS2 | Oil Pressure Switch OPS2 | OPS2 | 5404652 | 585-0228-00 | 50/60HZ/240V | Replacement | Goldar | Sensor | SEN-2903-1 | 021187000100002
![Copeland Oil Pressure Switch OPS2 | OP-S2 | OPS2 | Sensor | Copeland | 22S298 | SEN-2903 | 021002000100001 Copeland Oil Pressure Switch OPS2 | OP-S2 | OPS2 | Sensor | Copeland | 22S298 | SEN-2903 | 021002000100001](https://www.advanceworldgroup.com/public/files/products/COPELAND/sensor/500x500/sen-2903-6-a.webp)