When utility power goes out, the transfer switch does not kick in to generator power. Switching manually works fine. Return to utility works fine automatically.

Turns out it was the Manual-off-Auto switch that was bad. My DVM showed a voltage drop across the switch. The controller wasn't getting enough power.

One good thing about it was it forced me to really study the schematics to understand how everything worked. I'm now in the process of designing my own esp32 based controller, with wifi connectivity, to replace the stock control board.

The transfer switch could be bad, worn internally, a manual switch, or a semi-automatic transfer switch. Check the transfer switch part numbers and google them to find out exactly what kind they are. In some places fully automatic transfer switches are not permitted in a residential environment.

A transfers switch function whether manual or automatic is to ensure the utilitya nd generator can never be connected at the same time. If you have a manual start generator, you should have a manual transfer switch installed. Throw the transfer switch to emergency position (which disconencts your home or loads from utility) start the generator and close the generator breaker. When power comes on reverse this procedure

It depends on the brand of switch and generator. A Generac has its brains in the generator control board, others in the switch, what brand of switch please?

is the auto transfer switch rated to handle a 60 kva gen set cus you can use a larger auto switch on a smaller gen set but it don't work the other way cus you'll be burning up wires and contactors and have a fire !

This generator has a built in transfer switch. If you do not have an external source of 240 volts going in to the unit (utility power), the transfer switch will show a fault or "abnormal" reading. If you do have utility power going in to the transfer switch, and the generator is on then you have a faulty transfer switch. It is time to warranty or get a replacement switch.

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

If you are using a Manual transfer switch, then you should manually operate the system. Why don't you use the switch it came with? Why would you use a 200a manual transfer switch on a 17kw generator? The idea is to move your critical circuits into the transfer switch panel. Then it would operate in auto.

I suspect you will SOMEPLACE find protection fuse(s) for the sense lines from the utility. That is the first place to check.

Call an electrician.