Liberty Pumps Engineered Pump Systems (EPS) - Manual (Page 5)

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Maintenance and Troubleshooting
The pump(s) and control panel are supplied with their own separate Installation/Operation/Maintenance
manuals. Ensure that you have received these manuals, and that you read and understand them prior to installing this
unit. Your familiarity with the pump manual and the control panel manual is critical. Please follow the Maintenance and
Troubleshooting procedures provided in those manuals.
Because an EPS system can contain a large array of components, it would be ineffective to
include a complete troubleshooting list for each an every combination of components. Below
we have listed the most common problems and explanations. For further questions, please
contact our Technical Customer Service Department at 1-800-543-2550 or
[email protected] .
Pump running, but not pumping
1) Open ball valves at the street
Many times ball valves are left closed after installation and before the system is in use. Because there could be
multiple contractors or installers involved on a project, this could be missed when the system is finally in use.
With the ball valves closed, the pumps cannot remove water and will run continuously. This could cause flooding,
overheating the pumps, and damage to the system. To prevent this from happening, observe a complete cycle to
confirm pump(s) can remove water.
2) Open ball valves inside the tank
All EPS systems come equipped with ball valves for servicing. Ball valves should come from the factory in the
“open” position, but an installer may close them initially while the system is not in service. A closed ball valve
would not allow the pumps to remove any water and they would run continuously. This may cause overheating
and possibly damage to the system. A closed ball valve will have the handle perpendicular to the valve, while an
open ball valve will have the handle parallel to the valve. To prevent this occurrence, check all the ball valves
before powering-up the system and do a test run to make sure that any pumps in the system are able to evacuate
water.
3) Ensure that the pump is positioned correctly on the guide rail base
Liberty guide rail systems (GR20, GR22, and GR30) feature a self-aligning mounting bracket. When properly
installed, the pump should sit at an angle with the guide rail claw seated firmly on the guide rail base and the
guide rail gasket will be compressed by the weight of the pump. If the pump does not seat properly, the gasket
will not seal which will result in blow-by when the pump turns on. The same could happen if the guide rail gasket
is out of place. This could result in the water not evacuating the tank, longer cycle times, pump overheating, and
possibly even damage to the system. To fix this problem, pull on the lifting chain to move the pump into correct
position in respect to the guide rail (see Section 5).
4) Check Voltage at the panel
When pumps need to be installed long distances from a power source, special care must be taken to properly
size the wire being used. Considerations must be made for the pump’s required voltage, phase, Full-load amps,
and the length of wire. Proper sizing should be done by a professional electrician, but using a sizing tool as a
guide should get you an approximation. This would be a better alternative than guessing or even worse, using
the same gauge wire as the pump was supplied with. When insufficient wire size is used, there will be a Voltage
drop across the wire (anything higher than a 3% drop would be insufficiently sized). To detect a Voltage drop, the