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Troubleshooting
Appropriate vacuum is never reached.
Ensure the gas ballast is closed (vertical position, yellow LED off).
Ensure oil is fresh.
Ensure oil level is between MIN and MAX lines.
Ensure all port caps are closed and have working seals.
Limit amount of connections. Check for leaks at connections.
Use vacuum rated hoses.
Check for blockages between the pump and the system.
Check for a system leak.
Verify your vacuum gauge is in the correct location and is accurate.
Use the right pump for the job, 6CFM up to 10CFM (over 50 tons).
Perform a triple evacuation to carry moisture out of the system by
purging the system with dry nitrogen.
Vacuum rises when isolating the system.
Ensure your micron gauge is located on the system side of the
shut-off valve. The micron gauge of a 3 port (2 valve) manifold cannot
measure a system’s vacuum if the valves are closed. Use a shut-off valve
at the third port to isolate the pump from the system (page 20).
Check for a system leak.
Oil backlight does not turn on when plugged in.
Ensure power cord and outlet are functional. If backlight does not
shine and the pump turns on, the oil backlight LED module may need
to be replaced.
Pump makes excessive noise.
The pump may be experiencing a high load.
Loose objects may be vibrating in the case.
Motor bearings may be bad. Motor needs to be replaced.
Motor may have come loose. Tighten motor mount bolts.
Oil level or condition may be bad. Change the oil.
Leaks may be present. Tighten or fix all connections.
Oil mist is coming out of the exhaust.
Some slight oil mist is normal due to airflow carrying oil as it passes
through, and out of the pump. You can attach a garden hose to the
exhaust port to control oil misting (page 25).
For larger systems with long evacuation times, extended high
pressure conditions can cause excessive misting to occur. Add oil as
needed if excessive oil loss occurs.
Motor does not start when switched ON.
Models VPX7/VP87 have a soft-start feature that slowly increases
speed during startup. Slow startup in cold temperatures is normal.
Oil in the pump may have become overly viscous due to
contamination or low temperature. Use fresh Fieldpiece Vacuum Pump
Oil within the pump’s operating temperature.
The pump may be cold. Warm the pump in your truck/home by
letting it sit in warm environment. You can warm the oil in your truck/
home before adding it to the pump.
The pump may be cold. Open an unused input port to ambient for a
few seconds until the pump is running.
Voltage is incorrect. Ensure proper voltage and cord length.
Motor may be damaged. Motor needs to be replaced.
Motor thermal protection activated. Wait for the machine to cool
down to operating range and determine why it may have overheated.
Loading may be excessive.
Oil is leaking around base.
Oil likely fell into the housing from around the fill port and is now
dripping through the internal housing. Wipe clean and make sure oil is
not spilled when adding to the wide mouth oil fill port.
