integrated “Electrical Management System (EMS) helps to protect your RV against
voltage fluctuations, power surges and incorrectly wired shore power which can
cause severe and costly damage to RV appliances and electronics”
EMS Surge Protection system is a great tool to help protect your investment.
With that being said it can also be quite frustrating when it stops power from
coming inside the unit and you’re A/C doesn’t come on to cool off the camper.
Don’t get too alarmed just yet as this is what it is designed to do when it
senses an issue at the shore power in the campground. There are several reasons
why the surge protector stops the power but all of the reasons are protecting
your camper from possible damage. When this does occur, we want to take a look
at the surge protector display.
2017 and prior
models this display is located under the street side bed compartment. You will simply lift the access panel located under the bed and you should see the display mounted on the wheel well.
2018 models this display was moved to the rear cabinet on the
interior wall next to your fuse panel.
SURGE PROTECTOR ERROR CODES::
is blank – This means there is no power getting to the surge protector itself.
It could be that there is no power at the pole or the display is not connected
to the main control box. Check the 30a pole and make sure, if equipped, that the breaker is turned on.
The display will be blank when not connected to shore power or a generator. 12v Battery power does not go through the surge protector.
E0 – Normal Operating Condition. This is what you should see if everything is
working properly. It will also scroll through other information to display
volts, hertz, etc…
E1 – Reverse Polarity – This is a common issue at many campgrounds where the
Hot and Neutral wires are reversed. Without a surge protector you would still
get power and never know that there was an issue but reverse polarity can have
negative effects on sensitive electronics.
E2 – Open Ground – This is common when connecting to a generator as it is not
grounded. It can also occur if the shore power connection at the campground does not have a grounding rod. If this occurs when using a generator the only resolution to get power into the camper is to use a Neutral
Ground Plug in the generator or by switching the surge protector into bypass mode.
the surge protector into bypass mode is not recommended unless you are certain
that the power supply you are connected to is a good power source. A generator
must be pure sine wave to ensure that it is producing clean signal to the
camper. If you do choose to bypass the surge protector, it does still disable
the surge protection portion of the EMS; however all other features are
If you are getting the E2 error when connected to a generator then you should use a Neutral Ground plug, pictured below, so that the surge protector sees the generator as a grounded power source.
Neutral Ground Plug
E3 – Line 1 High Voltage – This occurs if the voltage jumps above 132v. This
will cause the system to work intermittently and can be very frustrating as it
might cause you’re A/C and Microwave to kick on and off erratically. This is typically a campground issue related to the pole you are connected to but can also impact the entire campground.
E4 – Line 1 Low Voltage – This occurs when the voltage drops below 104v. This
will have the same cause & effect as the E3 error code above.
E5 & E6 codes are reserved for the HW50C models only and should not
display with the model equipped in your Oliver camper.
E7 – Line Frequency High (Above 69 cycles) – this is a measure of how clean
the power being supplied is. The normal reading should be 60Hz. This is where
the term Pure Sine Wave comes into play as it needs to produce clean energy or
E8 – Line Frequency Low (Below 51 cycles) – Same as above
E9 – Data Link Down (Call Progressive Industries Tech Support @ 800-307-6702
E10 – Replace Surge Protector Module (Call Progressive Industries Tech
Support @ 800-307-6702
Your Surge Protector comes with a limited lifetime warranty from Progressive Industries. The warranty covers parts only. Please refer to the Progressive Industries warranty for more information.