Tranfer switch seems to work fine. If I shut off utility power it will tranfer to generator power. N1 and N2 do have 240 vac at generator and the transformer is fine. For some reason when the generator is set to auto it does not sense utility power so it starts up. If power is out the transfer switch engages. I then go outside and manualy start generator and it will feed generator load center. This is the type of tranfer switch with the built in 12 circuit load sensor. Part #0a1801 (battery charger assembly) has seemed to overheat. The plastic it slightly melted.
SOURCE: Generac Guardian 15kW Generator
That sounds just about right, if the relay contacts get welded together it sometimes takes out the driver on the printed circuit board. As you found out, 12vdc from 23 to 194 makes the transfer switch move to the Generator position, relay not energized makes the ATS move to the Normal position.
You can make a nice test function by installing a 10 amp contact switch in series with either the N1 or N2 terminals. When the switch is open the generator thinks the Normal power has failed.
Regards,
Carl
SOURCE: Generac 4456 does not start on power loss
I install and work on these everyday. If you hooked up the transfer switch you probable have a control wire wrong. check the utility power sense wire. That lets it no when to start in auto. it could be a relay or fuses. or a control board.
SOURCE: Suddenly in power outage and engine starts auto., NO inside power
DO U HAV POWER FROM GEN ?
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SOURCE: 10kw Generac Guardian not cranking, shows rpm sense loss
Sounds like Generator mode switch should be "ON".
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