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TRC 40100 Transfer Switch Malfunction Question


cbr046
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BOB,

EDITED the title for clarity as to what brand and model of ATS so that this thread (subject) can be more easily searched later on by other members.  Please note the change and do such for future posts.  Thanks,

TRC 40100 transfer switch not switching when generator is on.  There's 122V on both legs and 0V ->gnd on neutral leg.  The relay snaps closed, immediately reopens and repeat ~ every 5 minutes? 

I can push the relay closed and get a solid 122-0-122 at the output terminals.  There's a constant green led under the relay.

Shore power side transfers fine.

QUESTION IS . . . . . has anyone taken these apart and found anything with the relay / control board?

I don't want to replace if I don't have to. 

- bob

Edited by Tom Cherry
Clarity of Title
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Possibly the generator relay is at fault and may be replaceable. Or it may have something going on in the control board too.

Unless those components are replaceable then it sounds like a new transfer switch is in your future.

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41 minutes ago, cbr046 said:

TRC 40100 transfer switch not switching when generator is on.  There's 122V on both legs and 0V ->gnd on neutral leg.  The relay snaps closed, immediately reopens and repeat ~ every 5 minutes? 

I can push the relay closed and get a solid 122-0-122 at the output terminals.  There's a constant green led under the relay.

Shore power side transfers fine.

QUESTION IS . . . . . has anyone taken these apart and found anything with the relay / control board?

I don't want to replace if I don't have to. 

- bob

Bob…start from the beginning.  Measure as follows. Do this with the TRC open….while the Genny is still running.  You are measuring the Generator incoming cable on terminal strip…marked GENERATOR….

Line 1 (Red?) and Line 2 (black?) to each other…..ZERO since you have a 120 Volt system.

Line 1 & Line 2 to Neutral….120 or so volts….each side.

Line 1 & Line 2 to Ground….same 120 Volts….each side.

Ground to Neutral….ZERO VOLTS.

You can also, Genny OFF, check the OHMS or Continuity from Ground to Neutral.  I think it will be ZERO.

If you get this, then the Genny is fine….and the ATS is the suspect.  Don’t know if the TRC is field serviceable like the ESCO’S.  You will have to talk to the. And tell them the issue.  

If you do NOT get the right voltage readings above, the. There is a problem with the Genny…

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  • Tom Cherry changed the title to TRC 40100 Transfer Switch Malfunction Question
Posted (edited)

  

1 hour ago, Tom Cherry said:

Bob…start from the beginning.  Measure as follows. Do this with the TRC open….while the Genny is still running.  You are measuring the Generator incoming cable on terminal strip…marked GENERATOR….

Line 1 (Red?) and Line 2 (black?) to each other…..ZERO since you have a 120 Volt system.

Line 1 & Line 2 to Neutral….120 or so volts….each side.

Line 1 & Line 2 to Ground….same 120 Volts….each side.

Ground to Neutral….ZERO VOLTS.

You can also, Genny OFF, check the OHMS or Continuity from Ground to Neutral.  I think it will be ZERO.

If you get this, then the Genny is fine….and the ATS is the suspect.  Don’t know if the TRC is field serviceable like the ESCO’S.  You will have to talk to the. And tell them the issue.  

If you do NOT get the right voltage readings above, the. There is a problem with the Genny…

In the original post I did all that.  Except ohming the line back to the genny because voltage stays solid with actuator pushed in to supply 120V to coach. 

Looks like a new ATS . . . . I'm leaning the same model TRC / Southwire 40100 as most of our "glamping" is without shore power, then a portable surge protector for those few RV park excursions.  Should be easy wire-out, wire-in.  Thoughts? 

Note:  We did a lightning hit to the house about 6 weeks ago.  Lots of internet connected items in the house took a hit (modem, router, Vonage, ans machine, Dish receiver (connected to Vonage phone line), ethernet switch, a 12V maintainer in a barn and, in the coach, the HDMI stopped working on the Dish receiver in there.  It's possible a surge might have zapped the control board in the ATS.  Everything else in the coach turned out ok (so far).

- bob

 

Edited by cbr046
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5 minutes ago, Dr4Film said:

Where can we find your new topic with more detail?

LoL.  I thought I was reading & responding to the old topic ("ES50 Volt . . . . "). 

This *IS* the new topic.  Then I edited out the "new topic" comment.  Too many people in my head right now.  Sorry!

- b

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1 hour ago, cbr046 said:

  

In the original post I did all that.  Except ohming the line back to the genny because voltage stays solid with actuator pushed in to supply 120V to coach. 

Looks like a new ATS . . . . I'm leaning the same model TRC / Southwire 40100 as most of our "glamping" is without shore power, then a portable surge protector for those few RV park excursions.  Should be easy wire-out, wire-in.  Thoughts? 

Note:  We did a lightning hit to the house about 6 weeks ago.  Lots of internet connected items in the house took a hit (modem, router, Vonage, ans machine, Dish receiver (connected to Vonage phone line), ethernet switch, a 12V maintainer in a barn and, in the coach, the HDMI stopped working on the Dish receiver in there.  It's possible a surge might have zapped the control board in the ATS.  Everything else in the coach turned out ok (so far).

- bob

 

OK.  YOU ASKED.  TRC 40100 does NOT….PER a big “note” on the TRC site have any surge protection.  So that solves that issue or riddle.

have you called TRC and asked tech support for help and if you can purchase a new, presumably, control board.  If not, then, yes.  New ATS.

I AM BIASED.  I like the ESCO because they ARE field serviceable.  You order parts and pop in.  The LPT50BRD has a good track record.  It is about the same price as some of the TRC but you need to shop.  You should buy the ESCO from an authorized dealer and some of the Amazon sellers are not.  Folks have had issues with Lippert pumps for the same reasons.

As to surge protection, you need that ALL THE TIME.  The nicer and more reliable portables cost as much as the ones you install.  The Progressive HW50C is the most commonly used.  It goes BEFORE the ATS.  THAT protects the ATS.  I had a TRC SurgeGuard portable and permanently installed.  It is NOT field servicible…

I pulled it, sold it, put in an HW50C.  The HW50C has two boards and a contactor….100% field replacible.

my take…
 

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Posted (edited)

ATS is replaced with the same (but updated) TRC aka Southwire aka Surge Guard 40100.  It's a control board with switching relays only, with no surge protection.  $136.  That didn't even come close to the field part replaceable ESCO and the lot.  The newer unit has a different control board with bigger relays, parts wrapped in an RTV like substances and mounted in a different location.  I didn't care for the plastic case . . . .

I used a tool for the first time that I acquired in 1975 through a factory disposal sale - An in-lb torque wrench.  It only went up to 35 in-lbs so I had to fudge an additional 5.

I did call Southwire and while there is product support there's no field replaceable parts. 

The control board had a burned 2W resistor, discolored enough that I couldn't read the color code, but it had a resistive value.  Not sure if the wattage was underrated or if something else caused the resistor to fail.  Time was an issue. 

"need that (surge protection) ALL THE TIME" . . . . Totally not true.  It's very difficult to justify surge protection when 90% of camping is spent boondocking.  I run an inverter generator when I don't need air conditioning.  Even in the Southeast AC is rarely turned on. 

While the HW50C might have some nice qualities, including a remote monitor that has to be hardwired in, it doesn't have bluetooth.  I'm leaning toward the Watchdog for that reason alone.  And again, portable to eliminate multiple electronics in a single package that would be expensive to replace.  Plus, because it's portable, the pedestal can be tested without power going into the coach. 

Best,

- bob

Edited by cbr046
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4 minutes ago, cbr046 said:

ATS is replaced with the same (but updated) TRC aka Southwire aka Surge Guard 40100.  It's a control board with switching relays only, with no surge protection.  $136.  That didn't even come close to the field part replaceable ESCO and the lot.  The newer unit has a different control board with bigger relays, parts wrapped in an RTV like substances and mounted in a different location.  I didn't care for the plastic case . . . .

I did call Southwire and while there is product support there's no field replaceable parts. 

The control board had a burned 2W resistor, discolored enough that I couldn't read the color code, but it had a resistive value.  Not sure if the wattage was underrated or if something else caused the resistor to fail.  Time was an issue. 

"need that (surge protection) ALL THE TIME" . . . . Totally not true.  It's very difficult to justify surge protection when 90% of camping is spent boondocking.  I run an inverter generator when I don't need air conditioning.  Even in the Southeast AC is rarely turned on. 

While the HW50C might have some nice qualities, including a remote monitor that has to be hardwired in, it doesn't have bluetooth.  I'm leaning toward the Watchdog for that reason alone.  And again, portable to eliminate multiple electronics in a single package that would be expensive to replace.  Plus, because it's portable, the pedestal can be tested without power going into the coach. 

Best,

- bob

Your call and your decision. Comment about boondocking is correct. But, like anything else....bad power from a pedestal can kill over $10K in electronics. If that is the case, then never plug in and run your generator as needed for such.

The Portable ones were a PITA for me and were also "easily removed".  I had the locking device for the Surge Guard. But, if you read the literature on most of the portables....a little caveat about not mounting or using (or used to be) horizontally and must be vertical for best weatherproof protection. The location of the locking mechanism and such made it impossible to work all the time. I ended up with a short 50 Amp extension and used zip ties to keep it vertical. I guess we engineers read too much.  I read the specs on the HW50C and also the feed servicable....and we have a LOT of folks that said....I blew up something and my Surge Guard didn't protect.  That was back in the late 2009 through 2013 or so timeframe....so maybe they improved.  But the simplicity of two distinct and field servicable components convinced me.  I also had to help trouble shoot open neutrals and the costs of them was ugly....

That is what the Upstream of the ATS Surge Protector (regardless of brand) is needed....but the HW50C turns OFF the power....and if the MOS (surge chips) are bad...you KNOW IT.  The Surge Guard did little....they improved it and put on, I think, more codes....but it was totally "Glued together" and you either had them fix it or buy another.  Too big an investment for a simple $50 board.

Again.....Good luck with your system, whichever way you decide, then give us some feedback...

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