cancel
Showing results forย 
Search instead forย 
Did you mean:ย 

Shore works ATS in and out on Gen power

Juddla
Explorer
Explorer
2005 Damon Astoria 300 Cummins
I Just swapped transfer switch but having same issue. I put multi meter from gen to junction box off gen to ATS - 120 red 120 blk. Multi at ATS havenโ€™t checked as Switch bounces from clunk to click and back and forth not staying steady. On shore power all is fine.
1. Gen breaker is good
2. 50 amp breaker in house good.
3. Side cover pulled from gen and solid red light from volt regulator.

Absolutely lost at this point-
Anyone share some guidance?

Am I missing a fuse or another breaker?
62 REPLIES 62

Bikeboy57
Explorer
Explorer
Oh my! I be one them Clemson Tiggers! I still would have helped you, despite the Bama allegiance
Really glad you got it fixed without throwing money at it.
Richard and Rhonda
1999 Newell
Subaru Outback toad

enblethen
Nomad
Nomad
Many Generacs are belt driven generators.
They use a vertical shaft motor tied to a vertical shaft generator.
I was surprised that the 7.5 are, I knew that the smaller ones were.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

oldave
Explorer
Explorer
Who would have ever thought a belt tensioner could cause this issue ?

Does this mean the engine drives the gen by a belt ?

Have you run it long enough to be sure it is actually repaired ?
Or maybe something was disturbed causing it to work for awhile .

Ray

enblethen
Nomad
Nomad
That is great news!

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

Juddla
Explorer
Explorer
Recap of success-

So after exhaustive search โ€œweโ€ tracked it down to belt tensioner. So I grabbed some belt tacky spray hit belt and measured volts at switch. Seemed to slow down as it depleted after ATS kicked into load. So I pulled front cover on genny. Using 19mm long wrench, backed off bolt then put 3/4 on tensioner and tightened back up retaining bolt. Fired it up, held volts at Genny, junction box, and ATS. Then I Kicked on back AC, then front AC. Little to no volt drop.
Mission accomplished. Thanks for your expertise.
ROLL TIDE
LJ

enblethen
Nomad
Nomad
Yes, be careful!

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

Juddla
Explorer
Explorer
enblethen wrote:
Reading on the one that drops to 1.024 volts is on output of genset breaker has issues. One volt would mean it is going open!


Bud should I bypass the breaker to see if the switch drops out as itโ€™s been doing?

enblethen
Nomad
Nomad
Reading on the one that drops to 1.024 volts is on output of genset breaker has issues. One volt would mean it is going open!

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

Juddla
Explorer
Explorer
Enblethen-

All four connections showing 122ish
Brkr turned off and two posts hold 120.
One post drops to 1.024
And last bounces between 226 and 162 so fast I can read
Thoughts?

Juddla
Explorer
Explorer
enblethen wrote:
It is possible that the 50 amp main circuit breaker could have failed. Some of them are magnetic operation. This could cause the slow recovery.

Circuit breaker


Iโ€™m assuming you mean on generator. Not 50amp main in coach.
If generator, then Iโ€™m checking it now.

enblethen
Nomad
Nomad
It is possible that the 50 amp main circuit breaker could have failed. Some of them are magnetic operation. This could cause the slow recovery.

Circuit breaker

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

Bikeboy57
Explorer
Explorer
You have a generator problem. That's above my pay grade.
Richard and Rhonda
1999 Newell
Subaru Outback toad

Juddla
Explorer
Explorer
Bikeboy57 wrote:
Disconnect load lines at ATS and connect directly to lines from generator thereby bypassing the ATS altogether. Assuming voltage is 120, then turn on air conditioning in the coach. Measure voltage again. Easier than customizing the frau's hairdryer but is essentially the same test


Did it. No enough juice dropped to 48 volts each line!

Bikeboy57
Explorer
Explorer
Disconnect load lines at ATS and connect directly to lines from generator thereby bypassing the ATS altogether. Assuming voltage is 120, then turn on air conditioning in the coach. Measure voltage again. Easier than customizing the frau's hairdryer but is essentially the same test
Richard and Rhonda
1999 Newell
Subaru Outback toad