Check Input Voltage STP4 (2REC-C3)
electrical
Description
Stepper board 4 reports input voltage out of the 9V to 17V range for three seconds, and the unit alarms only while steppers on that board are powered OFF.
Activation Conditions
The stepper input voltage is reported out of valid range (9V to 17V) by stepper board 4 for three seconds.
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 voltage reported from all steppers.
Corrective Actions
1. Check for additional CCB3 / CCB4 and STP3 / STP4 alarms • Alarms for CCB3 and CCB4 indicate a problem before CCB3 or at CCB3. • Alarms isolated to CCB3 indicate a problem before CCB3 or at CCB3. • Alarms isolated to CCB4 indicate a problem between CCB3 and CCB4, or at CCB4. • Stepper Alarms isolated to STP3 or STP4 indicate a problem with the associated CCB. 2. Check wiring to CCB3 a. Check wiring. Check for physical damage to harness. Verify no damage, moisture, or corrosion in connectors. b. Check voltage. Check voltage at 3REC04 and 3REC15. Check voltage at 1REC01 and 1REC06. c. Check CAN connectivity. Verify CAN connectivity at 3REC05 and 3REC17. Verify CAN connectivity at 1REC02 and 1REC4.