1100 Series Nano Pump Service Manual 61
Troubleshooting and Test Functions 2
Index Missing
Index Missing: Pump channel A
B: Index Missing: Pump channel B
The encoder index position in the nano pump was not found during
initialization.
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 index position is not recognized within a
defined time, the error message is generated.
Probable Causes
• Disconnected or defective encoder cable.
• Defective pump drive assembly.
Suggested Actions
✔ Ensure the encoder cable are not damaged or dirty. Make sure the cables
are connected securely to the CSM board.
✔ Exchange the pump drive assembly.
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