17
IDP-7 Dry Scroll Vacuum Pump
DRAF
T 1/19/17
Troubleshooting
Use the Troubleshooting chart in Table 4 to assist in defining a problem, determining a possible cause, and defining action
steps to remedy the situation.
Table 4 Troubleshooting Chart
Problem
Possible Causes
Corrective Actions
Will not start
Fuse blown
Replace fuse.
Identify cause of overload.
Check the line voltage and the voltage configuration of the pump.
Motor thermal protector open
Allow motor to cool.
Identify cause of overload.
Excessive voltage drop
Check size and length of cable.
Defective motor
Inspect. Contact Agilent.
Poor ultimate
pressure
System leak
Locate and repair leak.
Water in pump
Flush pump with air or dry nitrogen.
Gas ballast plugged
Replace breather vent. Contact Agilent.
Solvent in pump
Flush pump with air or dry nitrogen.
Install trap or filter.
Seals worn out
Rebuild pump.
Poor conductance to pump
Replumb with shorter and/or larger diameter tubing.
Hammering noise Pump overheated
Check ventilation to pump.
Check ambient temperature.
Debris in pump
Check intake screen.
Flush pump.
Disassemble pump and inspect.
Pump runs
intermittently
Motor thermal protector is
cycling open and closed.*
Allow the motor to cool.
Identify the cause of the overload.
Service,
Maintenance, Tip
Seal, or Part
Replacement
Wear or damage
See Table 5 on page 18 and Table and Table 6 on page 18.
*
The IDP-7 is equipped with an auto-reset thermal motor protector. This protector will automatically shut down the
pump when it detects an overload condition, and will automatically restart the pump when the motor has cooled to
within an acceptable temperature range.
