6
Troubleshooting Guide
Your VacuMaster
®
pump has been designed for dependable use and long
you get the pump back into service as quickly as possible.
may be voided by misuse or customer tampering that results in the pump
being inoperable.
1. Check line voltage. Robinair VacuMaster
®
pumps are designed to start
at +10% line voltage (loaded) at 41
o
switching between the start and run windings may occur.
1. Verify the oil is not a residual accumulation from spillage, etc.
the plug using a commercial pipe thread sealer.
a thermistor gauge while applying vacuum pump oil at connections or
sealing the leak.
2. Verify the pump oil is clean. A badly contaminated pump may require
OIL CHANGE PROCEDURE.
Note: Use only high vacuum pump oil such as Robinair’s Premium High
Vacuum Pump Oil. Other oils will prevent pull-down to a deep vacuum.
pump is running. See OIL CHANGE PROCEDURE
operating temperatures will cause the oil to expand, so it will appear at
a higher level than when the pump is not running. To check the oil level,
start the pump with the inlet capped. Check the oil level in the sight
glass. Add oil if necessary.
Robinair distributor, or call Robinair’s toll-free service line for further
information: 1-800-822-5561.
When You
Need Help
Failure
To Start
Oil
Leakage
Failure
To Pull
A Good
Vacuum
