Instructions / Assembly
TROUBLESHOOTING
5
Failure To Start: Check the line voltage. The pump to start at ±10% line voltage (loaded) at 32 °F. At
extremes, switching between and start and run windings may occur.
Oil Leakage: Be sure the oil is not a residual accumulation from spillage, etc. If leakage exists, the module
cover gasket or the shaft seal may need replacing. If leakage exists in the area of the oil drain plug you may
need to reseal the plug using a commercial pipe thread sealer.
Failure To Pull a Good Vacuum: Be sure the vacuum gauge and all connections are in good condition and
leak free. You can conrm leakage by monitoring the vacuum the thermistor gauge while applying vacuum
pump oil at all connections or suspected leak points. The vacuum will improve briey while the oil is sealing
the leak.
Be sure the pump oil is clean. A badly contaminated pump may require several oil ushes.
Be sure the oil is at the proper level. For maximum pump operation, the oil must not be even with oil level
line on the sight glass when the pump is running. Do not overll. Operating temperatures will cause the oil to
expand, so it will appear at a higher level than then 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.