Troubleshooting; Troubleshooting Chart - Varian TriScroll 300 Serie Manual De Instalación Y Funcionamiento

Troubleshooting

Table 20 contains a list of possible problems, their probable causes, and corrective actions.
Problem
Pump won't start
Poor ultimate pressure
Pump makes hammering noise Pump overheated
40
TriScroll 300 Series Vacuum Pump
Table 20

Troubleshooting Chart

Probable Cause
Circuit breaker open
Motor thermal protector open
Electrical short under the motor
electrical cover
Wiring loose or cut
Excessive voltage drop
Defective motor
System leak
Water in pump
Gas ballast plugged
Solvent in pump
Seals worn out
Poor conductance to pump
Debris in pump
Corrective Action
Close breaker.
Identify cause of overload.
Allow motor to cool.
Identify cause of overload.
Inspect and repair.
Repair or replace.
Check size and length of power supply cable.
Inspect. Contact Varian.
Locate and repair leak.
Flush pump with air or dry nitrogen.
Replace breather vent. Contact Varian.
Flush pump with air or dry nitrogen.
Install trap or filter.
Replace tip seals. (Table 22 and Table 23 on
page 41 list maintenance kits and service
options.)
Replumb with shorter and/or larger diameter
tubing.
Check ambient temperature.
Check ventilation to pump.
Check inlet screen.
Flush pump.
Disassemble pump and inspect. (Table 22 and
Table 23 on page 41 list maintenance kits and
service options.)