P1 Carrier Controller Pre-trip Test Codes

P1 Tests - Heaters Current Draw: Heater is turned on, then off. Current draw must fall within specified range. No other system components will change state during this test.

P1-0 Heaters Turned On
Heater starts in the off condition, current draw is measured, and then the heater  is turned on. After 15 seconds, the current draw is measured again. The  change in current draw is then recorded.  Test passes if the change in current draw test is in the range specified.

P1-1 Heaters Turned Off
Heater starts in the off condition, current draw is measured, and then the heater is turned on. After 15 seconds, the current draw is measured again. The change in current draw is then recorded. Test passes if the change in current draw test is in the range specified.