P5-1 Carrier Controller Pre-trip Test Codes

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

P5-1 Supply Probe Test
This test if for units equipped with secondary supply probe only. The temperature difference between primary supply probe and secondary supply probe is compared. Test passes if temperature comparison falls within the specified range.


NOTE
If this test fails, “P5-1” and “FAIL” will be displayed. If both Probe tests (this  and the SUPPLY/RETURN TEST) pass, because of the multiple tests, the  display will read “P5” “PASS.”