Troubleshooting; Typical Sh-112 Maximum Starting Current And Duration @ 115 V 20 5 Troubleshooting Chart - Agilent Technologies SH-112 Bedienungshandbuch

Troubleshooting

Use the Troubleshooting chart in Table 5 to assist in defining a problem, determining a possible cause, and defining action
steps to remedy the situation.
Problem
Will not start One or both fuses blown
Motor thermal protector open
Excessive voltage drop
Defective motor
Poor ultimate System leak
pressure
Water in pump
Gas ballast plugged
Solvent in pump
Tip seal worn out
Poor conductance to pump
Hammering noise Pump overheated
Debris in pump
Pump runs Motor thermal protector is
intermittently cycling open and closed.*
The SH-112 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.
22
SH-112 Dry Scroll Vacuum Pump
Table 5 Troubleshooting Chart
Possible Causes
Replace fuses.
Identify cause of overload.
Check the line voltage and the voltage configuration of the pump.
Allow motor to cool.
Identify cause of overload.
Check size and length of cable.
Inspect. Contact Agilent.
Locate and repair leak.
Flush pump with air or dry nitrogen.
Replace breather vent. Contact Agilent.
Flush pump with air or dry nitrogen.
Install trap or filter.
Replace tip seal.
Replumb with shorter and/or larger diameter tubing.
Check ventilation to pump.
Check ambient temperature.
Check intake screen.
Flush pump.
Disassemble pump and inspect.
Allow the motor to cool.
Identify the cause of the overload.
Corrective Actions