Question about Generac HTSN100A 100Amp HTS 1ph 120/240V Automatic Transfer Switch

1 Answer

On a power failure switch will transfer to generator when commercial power is restored the switch will not transfer back and the generator cuts off leaving the building without power.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 843 Answers

Sounds like a problem with the H-100 controller. Contact Generac to get support.

Posted on Aug 27, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

HOW DO I install a 3 phase generater to an mcc to automatically change over to generater power in the event of a mains power failure?


You would need a three phase automatic transfer switch.

Your local electric company usually requires you the have these automatic transfer switches install by a license electrician.

Dec 03, 2014 | Electrical Supplies

1 Answer

Why wont my transfer switch change back to utilities position when the power is restored?


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?

Aug 20, 2014 | Electrical Supplies

3 Answers

Coils on transfer switch got fried when utility came back what could have caused this


possible failure of a relay. contact generac,sometimes they will accomodate you with new parts

Oct 08, 2012 | Generac Guardian 200 Amp Transfer Switch...

1 Answer

I have a Briggs & Stratton Automatic Home Generator 7 kW, Model# 40301. I had it installed by an electrician. Who also installed Briggs & Stratton Transfer Switch 50 Amp. The problem is the...


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?

Feb 15, 2011 | Briggs Stratton 7,000 Watt Automatic Home...

1 Answer

Generator Transfer Problem


There isn't much you can do with servicing the generator set or transfer switch unless you've got lots of experience in diagnoising semi-conductors and electronic components.

Depending on the age of the system, it would be benificial to have a qualified service tech take a look at it.

As an electrician, I've installed several back up generator sets in homes for customers and have had a few of these automatic transfer switches with intermittent operation issues. Sometimes it's the switch and other times it's the Generator that is causing the problems.

Hope this helps, and best regards!

Aug 07, 2009 | Generac 100 Amp 120/240-Volt Transfer...

2 Answers

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.

Jul 31, 2009 | Generac Guardian 0A18010 - battery...

1 Answer

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.

Jul 01, 2009 | Generac Guardian 200 Amp Transfer Switch...

2 Answers

Prblem with ASCO ATS


This could be part of the normal behavior of the ATS. Many ATS are set up to allow the switch mechanism to sit in the "neutral" position for a time delay (as much as a minute) so that things like large motors, pumps, etc to wind down so that they don't get powered up at full speed. Here is how I would troubleshoot your ATS:

1) With the Commercial power on and the ATS in Normal, start the generator and make sure that the power at the Emergency terminals of the ATS is the correct voltage and frequency, if this is a 3 phase system also make sure that the phasing matches the commercial power side.

2) Turn the generator off, make sure it's in off not auto. Turn the commercial power off. Then manually operate the ATS transfer mechanism (there is usually a little handle for this), check continuity of the poles of the transfer mechanism to make sure that it's really making and breaking contacts where it's supposed to. While you're doing this you need to check the limit switches at both sides of the transfer mechanism, These switches are how the ATS controller "knows" what state the mechanism is in, they sometimes get out of mechanical adjustment and on rare occasions break and have to be replaced.

3) Once you've satisfied yourself that the transfer mechanism is operating correctly, set it to the Normal position and turn the commercial power on. Switch the generator into Auto so that the system is in it's Automatic mode. Find the manual for the ATS if possible and locate and record all of the adjustable time delays, I often write down the time values we want inside the door of the ATS.

4) With your stopwatch or sweep second hand wristwatch at the ready, start the Test function of the ATS and time out the various operating states as the system goes thru them. In general your ATS should do something like this:

a) You hit the test function, the system simulates a Commercial outage and begins a transfer sequence. On many systems there is an adjustable time that the Commercial power has to remain off for anything to happen, this is Time Delay Start.

b) The ATS closes the contact that tells the generator to start. Then it waits until it sees correct power at the Emergency terminals of the transfer mechanism. When correct Emergency power is available, the ATS controller fires the transfer mechanism to put it into its neutral position. After an adjustable time delay (Time Delay Neutral), the controller fires the mechanism again to put it into Emergency position. Some mechanisms aren't designed to do this "stopping in the middle" feature and so there is only the one action by the controller to get from Commercial to Emergency position, it's also worth noting that on mechanisms that can stay in the neutral position the delay could be 0 so the switch will transition as fast as it can.

c) The system is now suppling the load from the generator. Some ATS require you to interact with the test at this point to get back to the Automatic mode, read the fine manual. In any case there will be a delay from the time the ATS detects correct power at the Normal terminals until it starts the sequence to get back to Auto, this delay is called Time Delay Emergency to Normal. You want this time to be just long enough to keep from making false transfers, but not so long that you waste fuel, most places are something like 15 - 30 minutes.

d) If there was a delay in the neutral position going to Emergency, there ought to be one coming back to Normal. Keep in mind that this delay isn't about the source of power, it's about the load.

e) Once the switch is in the Normal position, the ATS should keep the generator running for a time (Time Delay Cooldown), to allow the prime mover (engine) to return to a safe to shut down condition. On small air cooled engines this can be 0, on very large diesel engines it can be as much as 30 minutes.

f) The system is back in Automatic mode waiting for a power fail.

5) If the ATS can perform a transfer test as above correctly, it should be able to operate just the same way during a real outage. One can and should be able to demonstrate this by operating a disconnect (switch, breaker, etc) at the Commercial power side of the ATS.

If your ATS doesn't pass the transfer test as above, look for (in order of probability)
Incorrect power from the generator.
Broken or missadjusted limit switches in the transfer mechanism.
A mechanically broken transfer mechanism.
A bad controller in the ATS.

Regards,
Carl

Apr 07, 2009 | Winco 200-Amp Automatic Transfer Switch -...

1 Answer

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

Jan 20, 2009 | Generac Guardian 100 Amp Transfer Switch...

Not finding what you are looking for?
Generac HTSN100A 100Amp HTS 1ph 120/240V Automatic Transfer Switch Logo

Related Topics:

175 people viewed this question

Ask a Question

Usually answered in minutes!

Top Generac Electrical Supplies Experts

 Kenneth
Kenneth

Level 2 Expert

50 Answers

Ottoniel

Level 2 Expert

202 Answers

JOHN LAPIER

Level 3 Expert

2428 Answers

Are you a Generac Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...