Skip to main content ↑ ↓
Topic: Lost shore power to coach (Read 478 times) previous topic - next topic

Lost shore power to coach

Lost shore power to coach, but generator is providing power.  What do I need to check?  Shore power is going into coach, but not providing electricity.
Thanks, Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Lost shore power to coach

Reply #1 –
Do a search on automatic transfer switch or ATS to find out how to troubleshoot.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Lost shore power to coach

Reply #2 –
Mike,  With generator OFF, check 120 vac into transfer switch and 120 vac out.  My guess is the relay is not engaging to pass the power through to the coach.  All the best solving this issue.

Craneman has already suggested the same thing.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Lost shore power to coach

Reply #3 –
In addition to the check of the relay in the transfer switch...

Any chance you have either a Progressive EMS type device hardwired or the Maverick transfer switch that has the big orange over/under voltage relays in it?  If so and shore power is low voltage, devices like those won't pass power.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Lost shore power to coach

Reply #4 –
Showing my ignorance:  where would the transfer switch be located?
Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Lost shore power to coach

Reply #5 –
Under and at the foot of the bed passengers side.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Lost shore power to coach

Reply #6 –
Got it. Thanks.  After running genset for a while and after shut down, shore power is back on.  Any idea what this would indicate?
Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Lost shore power to coach

Reply #7 –
Quote from: Yetch –
Any idea what this would indicate?
See Reply #3.  Possible low voltage at shore power outlet.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Lost shore power to coach

Reply #8 –
On my coach, there are 2 ATS boxes installed.  Is this normal?
Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Lost shore power to coach

Reply #9 –
Quote from: Yetch –
On my coach, there are 2 ATS boxes installed.  Is this normal?
Mike

YES.

One for shore power vs generator.

The other for "either of the above" vs inverter.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Lost shore power to coach

Reply #10 –
Quote from: Yetch –
Got it. Thanks.  After running genset for a while and after shut down, shore power is back on.  Any idea what this would indicate?
Mike

Temporary low (or high) voltage from shore power .

If you have the 2 orange devices at this link, it is adjustable.  Help - NO shore power into coach 

Dan - Full timing since 2009
2003 U320 40' Tag 2 slide