1100 Series Nano Pump Service Manual 45
Troubleshooting and Test Functions 2
Pump Configuration 
At switch-on, the pump has recognized a new pump configuration.
The nano pump is assigned its configuration at the factory. If the active-inlet 
valve and pump encoder of channel B are disconnected, and the nano pump is 
rebooted, the error message is generated. However, the nano pump will 
function as an isocratic pump in this configuration.The error message 
reappears after each switch-on.
Probable Causes
• Active-inlet valve and pump encoder of channel B disconnected.
Suggested Actions
✔ Reconnect the active-inlet valve and pump encoder of channel B.