generator and EMS codes E2 and PE2

[TTMartin]

Originally Posted by tdf-texas

This made curious as I thought the delay built into the Dometic air conditioner only activated on initial power application. So, out to the trailer and turned on the AC. Blower comes on after short delay and then the AC compressor after a several minute delay.

Now for the test. I turned off the breaker to the AC and then back on simulating a temporary power loss. The blower immediately came back on and then after a couple of seconds, the AC compressor kicked back on.

I'm leaving my EMS delay at 136 seconds.

Thanks for doing that test and sharing the results with all of us.

[CharlesPou]

Originally Posted by tdf-texas

This made curious as I thought the delay built into the Dometic air conditioner only activated on initial power application. So, out to the trailer and turned on the AC. Blower comes on after short delay and then the AC compressor after a several minute delay.

Now for the test. I turned off the breaker to the AC and then back on simulating a temporary power loss. The blower immediately came back on and then after a couple of seconds, the AC compressor kicked back on.

I'm leaving my EMS delay at 136 seconds.

good test, I have a question though: why would Dometic delay relay only activate on initial power application?, how does it know?, isn't every power on an initial power application? my ac seems to have a mind of it own, and will often turn off the fan and compressor temporarily when it is maybe cycling from high to low mode. 1st time I noticed it, I thought it was the camp ground electricity surging, but turns out was my ac. ac otherwise works like a champ.
cheers

[sameo416]

Originally Posted by rubicon327

Steve: The Honda EU2000i and 2200i have a floating neutral and also a ground terminal. Are you saying to use the neutral bonding plug in an unused receptacle on the generator AND a ground rod connected to the ground terminal for true protection?

If you want to provide a full grounding system to earth, yes. All tying the neutral to ground does is allow the EMS to detect it is not floating.

Earthing of an electrical system provides for a low resistance path for fault currents to flow, both to protect people who might touch the energized metal frame of a device and to help ensure overcurrent protection operates quickly, (circuit breaker),

Without the earth ground it is possible a fault in an appliance could lead to the energizing of the skin of the appliance and someone touching it could complete the circuit and receive a shock. Traditional circuit breakers do not operate quickly enough to provide shock protection, which is why an earthed grounding system is required by code in distribution systems.

A circuit protected by a GFCI is not dependent on a ground connection, and still provides shock protection even using a generator with no earth connection.

How that risk of shock applies to a fibreglass trailer on rubber tires is a more complicated question.

[Little Richie]

Originally Posted by Hawkeye Ed

The EMS surge protector checks for several faults, including an open ground. An open ground means the ground wire and the neutral are not bonded (connected) anywhere between the generator and the RV.

E2 is the error code for open ground; PE2 means that previously the same error appeared (probably last time you hooked the generator up to your camper).

There's lots of information online about ground-neutral bonding if you want to research it. But most people just want the error code to go away so they can get back to camping.

What to do? People either make their own bonding plug or buy one like this one:

https://www.amazon.com/Southwire-Com...dp/B07F4R7BDL/

Plug the camper into one outlet on your EU2000, plug the bonding plug into the other, and fire up the generator. Your EMS will be happy (no error code) and you can get back to camping!

It’s been sometime since I use my Honda generator with my camper. If I remember correctly the issue is called a “floating ground”. I believe the solution is covered in the Honda manual that came with the generator and when I follow that it worked just fine. If you do t find it in the Honda manual try the progressive manual. There are some threads on the internet under Honda generator float pin ground...