60 PL-GPC 220 User Manual
5 Troubleshooting and Diagnostics
General Troubleshooting Guide
Oven Temperature Control Problems
• Fails to heat
• Check the over temperature cut-out has not tripped. Should be set about
5 °C above operating temperature.
• Temperature unstable
• Check that the oven fan is rotating at high speed. The speed of the fan is
recorded in the Service Engineer mode. Please contact your local Agilent
service representative.
• Check that the oven lid is fully closed and seals properly.
• Check that the power line voltage is not below 200 V.
• Check that the ambient temperature above 10 °C.
• Ensure that the stability of power line voltage and ambient temperature.
Protect the unit from draughts.
Solvent Module Problems
• Alarm lights and buzzer on continuously
• If Float Switches are plugged in, ensure they are placed in the respective
solvent reservoirs.
Pump Problems
• High back pressure generated at pump
• Replace the purge frit
• Low flow rate
• Purge pump to remove air bubbles
• Please contact your local Agilent service representative to check the
valves