Low pressure trip !!

[oilzee]

What is suction pressure when low pressure trips.
Is it 2 psi? What is suction pressure at compressor when you have -25°C room temperature. Is that temperature also at evaporator inlet? What is TD of evaporator?

i only measure the low pressure before pressure regulator ( 2 psi trip)not pressure at compressor . i have not measure the temperature at evap.inlet . No idea for TD select ,because my boss ask the supplier to design .