Agilent Technologies Quaternary Pump 1100 Series - Manual (Page 73)

73
Troubleshooting and Test Functions
Temperature Limit Exceeded
Temperature Limit Exceeded
The temperature of one of the motor-drive circuits is too high.
The processor continually monitors the temperature of the drive circuits on
the LPM board. If excessive current is being drawn for long periods, the
temperature of the circuits increases. If the temperature exceeds the upper
limit of 95 ºC, the error message is generated.
Probable Causes • High friction (partial mechanical blockage) in the pump drive assembly.
• Partial blockage of the flowpath in front of the damper.
• Defective pump drive assembly.
• Defective LPM board.
Suggested Actions ❏ Ensure the capillaries and frits between the pump head and damper inlet
are free from blockage.
❏ Ensure the outlet valve is not blocked.
❏ Remove the pump head assembly. Ensure there is no mechanical blockage
of the pump head assembly or pump drive assembly.
❏ Exchange the pump drive assembly.
❏ Exchange the LPM board.