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again after 5000 h of operation. To check the
Tip-seal life you have just to read the Win 358.
If dangerous gases were being pumped, flush the
pump with air or inert gas for at least 10 minutes
prior to disassembly.
To test the pumping system:
1.
Run the TPS-compact for about 5 seconds.
Verify that the front fan is running. If you hear
loud noises from the Scroll pump this indi-
Problem
TMP doesn't
Scroll Pump motor thermal protec-
reach NORMAL
tor open
OPERATION
Vacuum system leak
System will not
Excessive voltage drop
start
Fuses burnt-out
Poor ultimate
Vacuum system leak
pressure
Water in TPS-compact
Solvent in pump
Scroll Pump seals worn out
Poor conductance to TPS-compact
Hammering noise
Scroll pump overheated
Debris in Scroll pump
Internal Scroll
Motor thermal protector is cycling
Pump runs inter-
open and closed.*
mittently
*
The internal Scroll Pump is equipped with an auto-reset thermal motor protector. This protector automati-
cally shuts down the pump when it detects an overload condition, and automatically restarts the pump
when the motor has cooled to within an acceptable temperature range.
WARNING!
Troubleshooting Chart
Possible Causes
cates that the tip seal or main O-ring are pos-
sibly out of place.
2.
Disassemble and repair as necessary.
3.
The pump is now ready to return to service.
Newly installed tip seals may require several hours
of run time to seat properly and enable the pump
to meet speed and base pressure specifications.
Corrective Actions
Allow motor to cool. Identify cause of overload.
Locate and repair leak.
Check size and length of cable.
Check fuses and if necessary replace.
Locate and repair leak.
Flush the system with air or dry nitrogen.
Flush the system with air or dry nitrogen. Install
trap or filter.
Replace tip seals.
Replumb with shorter and/or larger diameter tub-
ing.
Check ventilation to TPS-compact. Check ambient
temperature.
Flush the TPS-compact. Disassemble pump and
inspect.
Allow the scroll motor to cool. Identify the cause of
the overload.
73/74
TECHNICAL INFORMATION
NOTE
87-901-010-01
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