Valve Failed - Agilent Technologies 1100 Series Reference Manual

Probable Causes
Suggested Actions
Troubleshooting and Test Functions

Valve Failed

Valve Failed
Valve 0 Failed: valve A
Valve 1 Failed: valve B
Valve 2 Failed: valve C
Valve 3 Failed: valve D
One of the valves of the multi-channel gradient valve has failed to switch
correctly.
The processor monitors the valve voltage before and after each switching
cycle. If the voltages are outside expected limits, the error message is
generated.
• Gradient valve disconnected.
• Connection cable (inside instrument) not connected.
• Connection cable (inside instrument) defective.
• Gradient valve defective.
❏ Ensure the gradient valve is connected correctly.
❏ Ensure the connection cable is connected correctly.
❏ Exchange the connection cable.
❏ Exchange the gradient valve.
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