52 1100 Series Nano Pump Service Manual
2 Troubleshooting and Test Functions
Inlet-Valve Missing
Inlet-Valve Missing: Pump channel A
B: Inlet-Valve Missing: Pump channel B
The active-inlet valve in the nano pump is missing or defective.
The processor checks the presence of the active-inlet valve connector every
2 seconds. If the connector is not detected by the processor, the error message
is generated.
Probable Causes
• Disconnected or defective cable.
• Disconnected or defective connection cable (front panel to CSPM board).
• Defective active inlet valve.
Suggested Actions
✔ Ensure the pins of the active inlet valve connector are not damaged. Ensure
the connector is seated securely.
✔ Ensure the connection cable is seated correctly. Exchange the cable if
defective.
✔ Exchange the active inlet valve.
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