P5-9 Carrier Controller Pre-trip Test Codes

P5 Tests - Air Stream Sensor Tests: Tests the validity of the Air Stream Sensors.

P5-9 Suction (Evaporator) Pressure Transducer Test
Units equipped with a secondary Evaporator pressure transducer. Test passes if suction pressure transducer (SPT) is within +/- 1.5 psi of the evaporator pressure transducer (EPT). Test P5-8 must pass before this test is run.