Pressure Relief Valve

The compressor is equipped with a pressure relief valve which is placed in system as a safety factor. Under certain conditions, refrigerant on discharge side may exceed designed operating pressure. To prevent system damage, valve is designed to open automatically at 460-600 psi (3171-4137 kPa) in an R-134a system. Conditions that might cause this valve to open, such as a defective pressure transducer, in inoperative cooling fan, etc., should be corrected. The refrigerant oil and refrigerant should be replaced, as necessary.