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Troubleshooting and Test Functions
Inlet-Valve Fuse
Inlet-Valve Fuse
The active-inlet valve in the quaternary 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 LPM board).
• Defective LPM board.
Suggested Actions ❏ Restart the quaternary pump. If the error message appears again, exchange
the active inlet valve.
❏ Exchange the connection cable.
❏ Exchange the LPM board.