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Old 03-05-2020, 01:07 PM   #1
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Brand: Thor Motor Coach
State: Florida
Posts: 3
THOR #18277
Shore power interruption

Why does my shore power stop for 5 to 6 minutes several times a day on my 2018 Thor aria 3901?
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Old 03-05-2020, 01:19 PM   #2
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Model: Entegra Accolade 37TS
State: Virginia
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THOR #1469
Does it happen the same time every day? If so, is you unit's AGS setup and enabled to exercise the generator at that time?
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Old 03-05-2020, 01:26 PM   #3
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Brand: Thor Motor Coach
State: Florida
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THOR #18277
No particular time when it happens. Ags disabled. Don’t want generator to come on
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Old 03-05-2020, 01:30 PM   #4
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Brand: Thor Motor Coach
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THOR #18277
No particular time for interruption. AGS disabled. Don’t want generator to come on
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Old 03-05-2020, 01:49 PM   #5
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Brand: Thor Motor Coach
Model: Palazzo 33.3 34'bunkhouse
State: Alabama
Posts: 2,063
THOR #4735
Clarify: when you say 'stop', do you mean that you simply lose ALL shore 120v power to all of your outlets and appliances yet still have 12v lights, fans, etc.?

If you lose 120v incoming shore power, it could simply by either the utility that is having issues, where as everyone else on that same utility would lose power as well, or you may have an issue with a loose WIRE somewhere along the electrical path:

- your Shore Power's MAIN breaker could have a loose wire(s)

- your SHORE CORD could...

- your ATS(automatic transfer switch) could...

- your coach's Main Panel's 50amp double pole breaker could...

etc.

give us more details about exactly what the symptoms are when you power 'stops'....
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Old 03-05-2020, 02:21 PM   #6
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Model: 2013 ACE 30.1
State: Alberta
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THOR #2631
If none of the previous poster items are the culprit, it may be your power monitor/protection device (if equipped) such as a Progressive Dynamics surge and voltage protection unit. If your shore power is producing random surges or brown out (low voltage) conditions, the power monitor device should disconnect your coach from shore until voltage conditions test in the normal range again; at which point it should reconnect to shore power again automatically.

The power monitor should (may) show a fault code when it trips off, which would confirm a shore power fault sense issue has caused the monitor to trip off. I know the Progressive Dynamics units also allow you to bypass protection sense to enable continuous connection to shore, but make sure you are running non voltage sensitive loads only if you do that (nothing with a motor for sure).
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Old 03-05-2020, 05:23 PM   #7
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Brand: Keystone
Model: Sprinter
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THOR #15553
If you have an EMS in line and it proves to be the culprit then install a Hughes Autoformer in front of the EMS and problems will go away and you will be fully protected.
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