Tri-Stepper Over Current
electrical
Description
1-2MSM reports too high current for three seconds, and steppers on that board are powered OFF until good power is reported.
Activation Conditions
The stepper current is reported to be too high by 1-2MSM (indicated by Stepper Output Voltage < 5V) for three seconds as timed at stepper board.
Unit Behavior
Engine and Electric Operation: Alarm only. Steppers on board with problem disabled (Powered OFF) until good power reported from Stepper Board at which point they are re-enabled.
Reset Conditions
10 Seconds of good current range reported from all steppers.
Corrective Actions
1. Check wires - Check wiring to Stepper Valves to 1-2MSM (SMV to 1-2MSM-2, 3, 4, 5; EVXV to 1- 2MSM-6, 7, 8, 9, 10; ECXV TO 1-2MSM-12, 18, 19, 20, 21. Verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors. 2. Check power - Check power at 1-2MSM-22 and 11. Verify battery power.