Join Date: Jan 2020
Location: Winston Salem, NC 27104
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Tabora, I appreciate your response as in searching the forum I have noticed you are the man in the know, so here goes:
First I have no formal training in Briggs Stratton generators, just a 35 year background in Industrial electronics and electrical.
This transfer switch is an older model. Maybe 20+ years old. I did not notice a model number inside the switch, but I will revisit the unit on Friday and search the unit for the number weather permitting.
It is paired with a Briggs Stratton model 1931-0 10 KW standby generator. (Neat little 40 amp generator)
I have managed to get schematics from the Sears parts website and other sites.
The generator began to give trouble starting.
I traced the problem to the starter contactor.
Once I replaced the contactor the generator starts and runs great when utility is removed.
The problem I encountered is that it fails to stop once the utility is restored.
The transfer switch board in question has two Light emitting diodes, one red and one green.
Numbers on the board are as I mentioned in the above post and both LED's are on.
Of the two contactors in the transfer switch, the generator relay (E) on the print stays energized and fails to drop out once utility is restored.
I have a new internal generator board (Cost $330.00) and I am going to swap it out.
Pins 17 and 18 are the ones that latch in once the generator generates 240 vac power, drops out the starter relay and holds in gas flow which will remain energized keeping the generator running.
Pins 15 & 16 get their power once utility is restored, and to my idea they should cause the board to stop fuel flow and allow relay (N) in the transfer switch to drop out. This however is not happening.
But the LED's are bugging me being both on, but maybe they should be on if utility and generator are supplying voltage to the little board.
The board in question is available for $185.00, but before I add another cost I need to get my ducks in a row.
It should be noted that this generator belongs to a friend whose wife has Alzheimer's and I offered to try to repair it if I could @ parts cost only.
Your help is most appreciated.