I am working on getting a standby generator working again. I’ve read through the forums and cannot find a similar issue. Generator was not working when the home was purchased two years ago and has not worked since around 2009 according to the previous owner. I am just getting around to visiting this and hopefully making it work again. Home built in 2004, which corresponds to the Generator model number and ATS. Called Generac and obtained the proper manual. Battery compartment bottom and side panel are corroded pretty bad, and there was no hope of saving the terminals on the old battery. Rest of the enclosure and motor are in great shape. I changed the battery terminals and installed a new battery. Also performed basic maintenance, changed oil, oil filter, air filter, new spark plugs. Checked all fuses on the Gen, all are good. Put fuses on generator back in after battery change, made sure the breaker to ATS was off, flipped the switch to ‘Manual’ and it fired right up and ran smooth after about 60 seconds. It starts right up manually every time I have tried the past 3 weeks and runs smooth, but now the fun part:
-4 flashing red LEDs do flash in manual mode, stating exerciser not set.
-Green LED on ‘system set’ does flash, indicating no utility sense when running in manual/auto mode.
-When panel button moved to Auto with utility power working – it starts right away and runs, will not turn off until switch is moved to off position. Set Exercise button does not work, it never shuts off after 12 minutes.
-Get 122 volts on each of the legs to the dual 50 amp breaker to ground and 244 together.
-N1 to ground gives 120v.
-N2 to ground gives 120v.
-N1+N2 gives 0v.
-I get no DC voltage on wires 23 or 194 when generator is running or off.
-Battery is maintaining 12.1-12.3v each time I check it.
I have not performed a manual flip to generator or done anything in the ATS. I did measure the wattage out of the house panel to the ATS with all circuits under load. There’s around 58-5900 watts total on the legs to the ATS.
Generator Model: 04674-2 Natural Gas, 12Kw.
Serial Number: 7668279
100 Amp ATS – Load Center model 4969
Looking for some pointers or next steps. I would like to do more troubleshooting before calling a dealer and paying tons of $$ on a service call if the unit cannot be fixed or potential repairs would cost more than a replacement unit.