1100 Series Nano Pump Service Manual 47
Troubleshooting and Test Functions 2
Inlet-Valve Fuse
Inlet-Valve Fuse 0: Pump channel A
Inlet-Valve Fuse 1: Pump channel B
One of the active-inlet valves in the nano pump has drawn excessive current
causing the inlet-valve electronic fuse to open.
Probable Causes
• Defective active inlet valve.
• Defective connection cable (front panel to CSM board).
• Defective CSM board.
Suggested Actions
✔ Restart the nano pump. If the error message appears again, exchange the
active inlet valve.
✔ Exchange the connection cable.
✔ Exchange the CSM board.
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