Troubleshooting guide – Robinair 15310 User Manual
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6
troubleshooting Guide
Your VacuMaster
®
pump has been designed for dependable use and long
life. if something should go wrong, however, the following guide will help
you get the pump back into service as quickly as possible.
if disassembly of the pump is required, check your warranty. the warranty
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
F (5° C). at extremes, however,
switching between the start and run windings may occur.
1. Verify the oil is not a residual accumulation from spillage, etc.
2. if leakage exists in the area of the oil drain plug, you may need to reseal
the plug using a commercial pipe thread sealer.
1. Confirm the vacuum gauge and all connections are in good condition
and leak-free. You can confirm leakage by monitoring the vacuum with
a thermistor gauge while applying vacuum pump oil at connections or
suspected leak points. the vacuum will improve briefly while the oil is
sealing the leak.
2. Verify the pump oil is clean. A badly contaminated pump may require
several oil flushes. see 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.
3. Verify the oil is at the correct level. For maximum pump operation, the
oil must be even with the OiL LeVeL line on the sight glass when the
pump is running. See OIL CHANGE PROCEDURE. Do not overfill —
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.
if these procedures do not correct the problem, contact your nearest
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