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Troubleshooting and Test Functions
Index Adjustment
Index Adjustment
The encoder index position in the quaternary pump is out of adjustment.
During initialization, the first plunger is moved to the mechanical stop. After
reaching the mechanical stop, the plunger reverses direction until the
encoder index position is reached. If the time to reach the index position is
too long, the error message is generated.
Probable Causes • Irregular or sticking drive movement.
• Defective pump drive assembly.
Suggested Actions ❏ Remove the pump head, and examine the seals, plungers, and internal
components for signs of wear, contamination or damage. Exchange
components as required.
❏ Exchange the pump drive assembly.