Upon arrival, system is showing a "low pressure " light. Reset system and attempted to fireoff while checking R-22 refrigerant pressures. Stagnant pressure is 110psi. System comes on but only runs for approximately 5 seconds. During operstion, suction pressure falls to 85psi and discharge rises to 1130psi. Low pressure switch is rated at 20psi. Checking through wiring diagram shows that a low pressure code can also occur when there is a heavy load from the compressor. Attempted to start up again while bypassing low pressure switch and reading amp draw on compressor. System comes on and initial start up amp draw was approximately 70A, and only dropping to 65A after five seconds before shutting off on low pressure code. Compressor has worn out, is causing high amp draw and will not operate anymore. Due to the age of the unit, manufactured in 1994, full system replacement is highly recommended.
