Agilent Technologies 1260 - Installing the Detector

50 1260 Infinity Micro Degasser Service Manual
6 Troubleshooting and Diagnostics
Hardware Symptoms
The following parts can be responsible for an insufficient vacuum:
1 Leaky tubing,
2 Leaky chambers,
3 Defective proportional valve,
4 Defective pump,
5 Defective electronics.