Temporary loss of 20-amp power

[Ransom4365]

Hello All,
We have a 2021 Momentum 351m Toy hauler that is experiencing a temporary loss of 12-volt power. The GFCI's will flash red for less than 1/4 second but not long enough to trip the GFCI, but any clocks will reset to 12:00. No circuit breakers have tripped.
I have tried to recreate the issue, but I can't.
As part of my troubleshooting process. I changed out the shore power monitor, checked each GFCI, and unplugged any unnecessary device that was not an OEM device.
The temporary loss of power can occur as short as 2 minutes or as long as 5 hours. How I know this is the flashing clock will show the time since the power experienced a temporary loss of power. I can hear a click sound from behind the cabinet where the circuit breaker panel is located, but NO circuit breaker has been tripped.
Sorry for so long and thanks for any help provided.

 

[jkwilson]

Not sure I understand. The items you mention are 120V, not 12V. Are you running from an inverter?

 

[Ransom4365]

Not sure I understand. The items you mention are 120V, not 12V. Are you running from an inverter?

Your correct, I should have said 20 Amp. Just normal items used in an RV or house.

 

[Ransom4365]

Hello All,
We have a 2021 Momentum 351m Toy hauler that is experiencing a temporary loss of 12-volt power. The GFCI's will flash red for less than 1/4 second but not long enough to trip the GFCI, but any clocks will reset to 12:00. No circuit breakers have tripped.
I have tried to recreate the issue, but I can't.
As part of my troubleshooting process. I changed out the shore power monitor, checked each GFCI, and unplugged any unnecessary device that was not an OEM device.
The temporary loss of power can occur as short as 2 minutes or as long as 5 hours. How I know this is the flashing clock will show the time since the power experienced a temporary loss of power. I can hear a click sound from behind the cabinet where the circuit breaker panel is located, but NO circuit breaker has been tripped.
Sorry for so long and thanks for any help provided.

Correction, 20 Amp power. Thanks for correcting my mistake.

 

[Riverbug]

Are you certain that the shore power source you are connected to is stabile?

 

[WhittleBurner]

Correction, 20 Amp power. Thanks for correcting my mistake.

I corrected the thread title to show 20 not 12

 

[Ransom4365]

Are you certain that the shore power source you are connected to is stabile?

YES, I have checked the shore power source with two different power monitors. Both showed the correct power supply with no faults detected.
Thank you for your response.

 

[Ransom4365]

I corrected the thread title to show 20 not 12

Thank you for correcting my title page.

 

[Riverbug]

YES, I have checked the shore power source with two different power monitors. Both showed the correct power supply with no faults detected.
Thank you for your response.

Are you using a surge protector? Is that the monitoring device you refer to? What are you using? Do you have an issue if that device is removed?

And I assume you are not using an inverter?

 

[Ransom4365]

After calling a Licensed RV technician. He was able to determine that the 50-Amp automatic transfer switch was faulty.
On a 2021 Grand Design 351m it is located behind the false wall in the crawl space.
Thanks to all who tried to help me find the issue.
Everything is working as advertised.

 

[Riverbug]

After calling a Licensed RV technician. He was able to determine that the 50-Amp automatic transfer switch was faulty.
On a 2021 Grand Design 351m it is located behind the false wall in the crawl space.
Thanks to all who tried to help me find the issue.
Everything is working as advertised.

Good that you found the problem and got it resolved. The transfer switch is not something that would have come to mind for me until much further down the road. That's good to know for future troubleshooting.