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4 Maintenance and Troubleshooting Pump not turning on The pump(s)and control panel are supplied with their own separate Installation/Operation/Maintenance 1) Check that control floats are unobstructed and operate properly manuals. Ensure that you have received these manuals,and that you read and understand them prior to installing this Most EPS systems come with control panels to operate the pumps. These panels commonly make use of float unit. Your familiarity with the pump manual and the control panel manual is critical. Please follow the Maintenance and switches to send a signal back to the panel. The floats will be positioned at various levels to accomplish the Troubleshooting procedures provided in those manuals. intended pump cycle.As the water level raises,the floats viii rise as well on their tether and activate a switch located inside the float.If something Inside the tank obstructs the float from rising,it would not be able to activate Because an EPS system can contain a large array of components,Ft would be ineffective to and the control panel would not operate the pumps.This would usually result in the high level alarm triggering or Flooding.Likewise,if a float switch Is trying to drop and it cannot because it is resting on another object,it would include a complete troubleshooting list for each an every combination of components. Below not signal the control panel to disengage the pumps and they would run continuously.This would result in we have listed the most common problems and explanations. For further questions,please overheating or damage to the system. Always check for proper float operation throughout the cycle. Take care to contact our Technical Customer Service Department at 1-800-543-2550 or notice if the float has the ability to hang up on anything inside the tank including the pumps themselves or the sunoortAllbertvvumos.compower cords. Pump running,but not pumping 2) Check that panel has control power Control panels utilize a complex series of circuits to properly control the duty cycles of the pumps.These circuits 1) Open ball valves at the street must be powered,commonly with 120 V,single phase electric. The circuli powering the controls should be Many times ball valves are left closed after installation and before the system is in use. Because there could be separate from the circuit powering the pumps. There will be a dedicated set of terminals to connect power to the multiple contractors or installers involved on a project,this could be missed when the system is finally in use. control circuitry. Failing to power the controls will result in the pumps not operating automatically. Most panels With the ball valves closed,the pumps cannot remove water and will run continuously. This could cause flooding, have an LED light that will tum on when control power is properly installed. overheating the pumps,and damage to the system. To prevent this from happening,observe a complete cycle to confirm pump(s)can remove water. 3) Attempt to run pump(s)manually with control panel All control panels should come equipped with HAND-OFF-AUTO switches(H-O-A)that can be used to change 2) Open ball valves inside the tank the operation of the control panel. The HAND mode Is another name for manual. If the control panel is set to All EPS systems come equipped with ball valves for servicing.Ball valves should come from the factory in the HAND mode it will automatically run the pump no matter what the current liquid level is. The OFF mode does the "open'position,but an installer may close them initially while the system is not in service. A closed bell valve opposite.When the control panel is set to OFF mode it will not run the pumps no matter what the current liquid would not allow the pumps to remove any water and they would run continuously.This may cause overheating level is. The AUTO mode Is the normal operation mode.In AUTO mode the floats(or in some cases transducer) and possibly damage to the system. A closed ball valve will have the handle perpendicular to the valve,while an will trigger the control panel to operate the pump,turning"On"when the liquid level reaches a certain height,and open ball valve will have the handle parallel to the valve. To prevent this occurrence,check all the ball valves turning"Off"when the liquid level falls to a certain height. If the pump(s)is not turning on in the AUTO mode,you before powering-up the system and do a test run to make sure that any pumps in the system are able to evacuate may troubleshoot the system by temporarily changing the control panel to HAND mode. If the pumps operate and water. pump down the liquid level,this would signify that the problem is with sensing the water level,most likely one of the floats Is not working correctly. It could be out of position,obstructed,or defective. 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 4) Attempt to run pump(s)automatically by hand or by adding water to the tank installed,the pump should sit at an angle with the guide rail claw seated firmly on the guide rail base and the All of our systems are meant to run automatically. The pump(s)would be controlled by an automatic float switch guide rail gasket will be compressed by the weight of the pump. If the pump does not seat properly,the gasket or through a control panel which would utilize either float switches or a pressure transducer. After installing a will not seal which will result in blow-by when the pump turns on. The same could happen if the guide rail gasket pump system,it would be a good idea to run the pump(s)through a cycle by adding water Into the pit in order to is out of place. This could result In the water not evacuating the tank,longer cycle times,pump overheating,and operate the pump. If adding water Is not an option,raising the float switches by hand in the order that they would possibly even damage to the system. To fix this problem,pull on the lifting chain to move the pump Into correct normally raise would simulate water entering the pit. If the pumps turn on,evacuate the water,and tum off,then position in respect to the guide rail(see Section 5). you would know that they system Is working properly. This same method can be used to troubleshoot a pump that is not turning on some time after installation. An advantage of using a control panel Is that commonly each 4) Check Voltage at the panel float would have Its own LED light inside the panel. By raising the floats by hand or with water,you could easily When pumps need to be installed long distances from a power source,special care must be taken to properly tell if a float was not functioning by whether or not it turns on its corresponding LED light. 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 ®Copyright 2016 Liberty Pumps Inc. All rights reserved 5 OCopyright 2016 Liberty Pumps Inc. All rights reserved 7