Question about Beam Industries 2775 Serenity Plus Central System Vacuum

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Beam central vac

Won't turn off ,so i disconnected the the low voltage wires that run to the outlets. still won't shut off . thanks for help

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Don't know the exact model, but it sounds like the low voltage relay is stuck. This will be inside the unit, probably mounted on a replaceable board. You may be able to temporarily free it with a quick tap on the top of the relay if you locate it. But I would suggest replacing it to avoid further problems. mdvacuum.com would probably have the part you need. Good Luck!!

Posted on Jan 04, 2009

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The Vaccum is not turning on when i plug the hose into the wall. The hoover system will turn on when i turn the switch on at the base and wont go off till i turn the switch off. But it will not come on...


you can test this out by taking a small metal spoon and with the bottom side of the spoon insert it into the vac outlet on the wall. you want to touch the two metal pins inside the vac outlet to test if the unit is the problem or the hose is the problem.

If the unit starts, the hose should have a 3 year warranty on it. I recommend you have your nearest beam dealer check it out.

If the unit does not start, it has a 7 or 10 year warranty, the circuitry should be replaced. Again have your nearest beam dealer check it out.

good luck

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You probably have a stuck relay. You can try tapping with medium force next to where the low voltage wires are attached to the unit using the handle end of a hammer. Even if this works it's time to replace the circuit board. Take the unit to a local vacuum repair center for service.

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No, there is only two possibilities. One, the low voltage wires are touching somewhere in the system or two, the relay is stuck in the on position. To find out which it is disconnect the low voltage wire from the unit (theres two clips on the side) and then plug the canister in. If the it still runs with the wire disconnected then it is the relay board. If it doesn't then it is the low voltage wiring in the system. Good luck!

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You main low voltage line from the vac to the house is likely disconnected. Start by looking at the connection where the small wires enter the vac. Touch across those two wire terminals with a screwdriver or needle nose pliers and the vac should start.If it does, inside the home those same wires run along your pie to each inlet. Somewhere along the pipe path the wires have been disconnected or broken.. Think back to any area where work has been performed or face plates removed for painting, etc. Remove each inlet one at a time and look for a loose connection on the screw terminal at the back of the inlets. When reinstalling be certain each wire is tidy and connected to only one screw terminal at the back of the inlet. Once all inlets are connected in line you will have a complete circuit back to the vac. Post back with results

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1 Answer

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Start with this. Unplug the vac to shut off, then disconnect the low voltage wiring at the vac.Plug the vac back in. If the vac still runs you have an internal short on the relay or wiring inside the vac.
If the vac stops then the vac and final wiring is OK and the problem is in the wiring in the house.
Have you removed any inlets for painting or had any renos done or pictures hung. If so undo what you did last. If inlets were disturbed remove them and look for low voltage vac wires touching metal backing plates in the wall or touching the inlet mounting screws.
If you have done a reno or hung pictures you may have pierece the wire for the vac creating a low voltage short which will keep the vac running until removed. I have seen this happen with freshly installed 1/4 round molding along a baseboard

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If the central vacuum tank will not turn OFF even with the switch in the “OFF” position, then the low-voltage wires should be disconnected from the tank. If the tank continues to run and still will not turn off, then most likely the relay inside is defective (but it could be a defective and/or shorted ON/OFF switch). If with the low-voltage wires disconnected the tank is able to then be turned off with the switch, then there is a short in the low-voltage wires or a hose is plugged into an inlet somewhere. ~ TTURAMBAR

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My Beam central vac has started turning off after about 10 minutes of use. I thought it was the hose, but the hose in the garage does the same thing, and I've also tried the other outlets, and the same. The canister was just emptied about two weeks ago. I have also reset the breaker, and unplugged and replugged in the system. Could this be a bad motor?

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1 Answer

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If the central vacuum tank will not turn OFF even with the switch in the “OFF” position, then the low-voltage wires should be disconnected from the tank. Once this is done, if the tank continues to run and cannot be turned off with the switch, then most likely the relay inside is defective and needs to be replaced (but it could be a defective and/or shorted ON/OFF switch). If with the low-voltage wires disconnected at the vacuum tank, it can be turned off with the internal switch, then either there is a short in the low-voltage wires, or else there is a hose still plugged into an inlet somewhere. ~ TTURAMBAR

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1 Answer

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It is possible that the low voltage wiring that controls your central vacuum has been damaged during the cable work. You can check to see if the low voltage relay is working by shorting the two terminals together at the unit. Just disconnect the two small (18-22 gauge) wires from the unit and short across the terminals where the wires connect. If the unit comes on, the vacuum is fine, and it is most likely the low voltage control wires that have been damaged. It should be a pretty easy fix, if you can get to where the wires are located. They are probably just pulled apart at a joint. Good Luck!!

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Central vacs have relays in them, some stand alone, others mount on a circuit board. A stuck relay causes this type of problem. At the unit disconnect the low voltage wires, plug in your unit, does it still come on, if it does then you have a bad relay. If it doesn't then you have a problem somewhere in your low voltage wiring. One of the outlets, the wires may be touching or there is a staple casuing a short.

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