Tri-Stepper Input Voltage
electrical
Description
Tri-stepper input voltage is out of the 9V to 17V range for three seconds, and the unit alarms only and powers off the affected steppers until good power returns.
Activation Conditions
The tri-stepper input voltage is reported out of valid range (9V to 17V) 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 reenabled. NOTE
Reset Conditions
10 seconds of good voltage reported from all steppers. Follow the steps below until a problem is found. Once a repair or correction has been made, clear the alarm(s). (Refer to Note 1 in Notes Section.) Operate the unit through the appropriate modes to see if any active alarm occurs. Continue with the steps below as necessary.
Corrective Actions
1. Check voltages - Check input voltage at 2MSM22. Should be battery voltage a. Check wiring to 2SVM and verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors. 2. Disconnect Stepper Valve(s), if alarm goes away - Check operation of suspected valve.