Stepper Over Current
electrical
Description
1-2MSM reports stepper current too high for three seconds, and the 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
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 and EVXV to 1- 2MSM-6, 7, 8, 9, 10). Verify that 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.