7–115 62-11640
25200 NO COMM FROM MICRO TO STP2
• ACTIVATION: Alarm 21100 is not active and No sync responses have been received from the Stepper 2
Module for 10 seconds.
• UNIT CONTROL: Engine and Electric Operation: Required Shutdown. If alarm remains active for 2 min-
utes issue a shutdown command to all modules except the display.
• RESET CONDITION: Sync response received from the Stepper 2 Module in the past 10 seconds, alarm
reset or alarm may be manually reset by turning the unit off, then back on again.
NOTE: 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, page 7-2.) 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 for Alarm 25100
If AL25100 is not present, it indicates the SVM Board is bad. Replace the SVM Board.
25201 OVER CURRENT STP2
• ACTIVATION: The stepper current is reported to be too high by stepper board 2 (Indicated by Stepper
Output Voltage < 5V) for 3 Seconds as timed at stepper board.
• UNIT CONTROL: 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 CONDITION: 10 Seconds of good current range reported from all steppers.
NOTE: 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, page 7-2.) 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 power
Verify power at 3SVM11 and 3SVM 22.
2. Check wiring
Check wiring to ECXV to SVM2. Verify there is no physical damage to harness, and no damage,
moisture, or corrosion in connectors.
25202 CHECK INPUT VOLTAGE STP2
• ACTIVATION: The stepper input voltage is reported out of valid range (9V to 17V) by stepper board 2 for
3 seconds as times at stepper board.
• UNIT CONTROL: 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 CONDITION: 10 Seconds of good voltage reported from all steppers.
NOTE: 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, page 7-2.) 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 power
Verify power at 3SVM11 and 3SVM 22.
2. Check wiring
Check wiring to ECXV to SVM2. Verify there is no physical damage to harness, and no damage,
moisture, or corrosion in connectors.
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