If unit is over 8 years old it has a mechanicial timer for the Cool down run time (after power comes on) these go bad from believe it not "Rust" the timer will need to be replaced with a new model , that most likely will be an electronic timer replacement , now if unit is less than 8 years old . and this is a new install then verify that ,Sense connection on terminal strip on ckt board is connected to land power
SOURCE: transfer switch will not switch back to utility
The transfer switch should transfer back to utility within about 30 sec. after utility is restored. While waiting for the transfer switch to switch back to utility volatge. Check for DC volatge across wires 23 and 194 in the transfer switch, if you have battery voltage(12-13.5 VDC) then you you probably have a stuck relay on the PC board in the generator. The board needs to be replaced. If you don't have battery voltage across these terminals then your problem is actually in the transfer switch.
SOURCE: Asco transfer switch does not
Same problem here with the ASCO 165, after a couple of fierce lightning strikes yesterday that did over $10k damage to my neighbor's electronics, and also took out my garage door opener.
I'm pretty confident the control board is the problem, but I don't plan to try to replace components. Will probably opt for a new control board from ASCO, or another source, assuming they are still available.
SOURCE: I have a Briggs & Stratton Automatic Home
It sounds like the mains sense wire is disconected from the control panel or the run wire is not being cut by the aux contact on the transfer switch.
Is the transfer switch manual or motorised?
SOURCE: Just finished installing a 20 KW Generac generator
Check the connections on the tranfer relay and two coils. The two coils have blue wires. I have seen them come off from assembly or shipping its common. Each coil has two blue wires #8 and E1 with crimp steak ons and limit switches make sure there all pushed on all the way. Hope this helps
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