Thermal Fault - Agilent Technologies 8860 User Manual

6 Maintenance and Troubleshooting

Thermal Fault

• Check for a very large heating/cooling source nearby that may interfering the gasifier
• Check for breakage of gasifier cover if vaporizer temperature cannot get ready.
Do not open the gasifier cover, contact your Agilent service representative.
WAR N IN G
• Check for breakage insulation of the transfer line if the transfer line temperature cannot
get ready.
Gasifier Never Heats Up
• Check for errors from user interface (Local UI, Web UI, OpenLab, etc.).
• Check for communication between GC and Gasifier.
Gasifier Flow Too Low
• Ensure sample cylinder has sample and/or the sample pressure is high enough to sustain the
whole analysis period.
It is strongly recommended that the sample is pressurized to at least 1380 kPa above the vapor
NOTE
pressure of the mixtures at all times.
• Check for leaks. (See
• Check for blockage. (See
Gasifier Flow Not Adjustable
• If the needle valve knob can not turn at all, it means the valve is blocked.
• If the needle valve can be turned freely, but the flow stays unchanged:
• Check that the sample cylinder has sample and/or the sample pressure is high enough
• Check for leaks. (See See
• There may be some blockage before needle valve. Check for blockage. (See
Gasifier Flow Fluctuates
• Check that the sample cylinder has sample and/or the sample pressure is high enough
• Check if there is pressure reducing components like needle valve, restrictions between the
sample cylinder and the gasifier inlet. Samples may partially vaporize before entering the
gasifier. Remove those pressure reducing components.
• Gasifier vaporizer temperature is not high enough to fully vaporize high boiling point
components. Increase the gasifier vaporizer temperature.
Thermal Fault
A thermal fault means that the Gasifier heated zone is not within its allowable temperature range
(lower than minimum temperature or higher than maximum temperature). Several things could
cause this error:
• A problem with the electrical supply to the Gasifier.
• Communication lost between the Gasifier and GC.
52
"Checking for Leaks"
"Checking for Blockage"
for Blockage" on page 54.)
on page 53.)
on page 54.)
"Checking for Leaks" on page 53.)
Agilent 8860, 8890, and 990 Micro GC Gasifier User Manual
"Checking