RUMnano Troubleshooting Guide

Created by Austin Bleier, Modified on Mon, 21 Apr at 9:40 PM by Austin Bleier

Initial Steps

Find the RUM unit inside the pedestal

The RUM units will be in different locations depending on the pedestal manufacturer and installer, while we cannot guarantee identical installations between different installers we can give general guidance to the most likely locations. (common locations for RUM installations are in red) Information on how to open a pedestal can be sourced from the pedestal manufacturer.

Marina Electrical Equipment – Harbor light SS

Marina Electrical Equipment – Bayside

Eaton - Hatteras Light Power Pedestal

Eaton - Newport Harbor Mate Utility Center

Newport Harbor Mate Utility Center

Eaton – Lighthouse Power Pedestal

Eaton – Lighthouse-SS Power Pedestal
Confirm the Serial Number on the device matches what is on the Portal.

The Serial Number is found on the smaller lower sticker on the outside of the device enclosure. The number will begin with LRM for RUMnano’s and LRP for RUMnanoPro’s. This serial number will also be present inside the device on a similar sticker on the PCB of the unit.

Once this Serial Number has been found, ensure the serial number on the portal matches. This serial number can be found by following the below steps:
1. Go to the location where the space/slip is located
2. Click on the row of the space/slip in question
3. The Serial Number will be found at the lower left of the metering popup.

If the RUMnano is not Communicating

Ensure the RUMnano is powered by the DC power supply
The first two pins on the left of the device are the power and ground pins. By taking a multimeter (set to DC voltage) to these two pins you can see whether the RUMnano/Pro is powered or not. For a RUMnano the proper voltage is 5VDC, while for a RUMnanoPro the proper voltage is 12-24VDC.

If there is no DC voltage then check the AC voltage applied to the DC Power Supply, the power supply should be connected to a line and a neutral providing ~120VAC. If there is no AC voltage then there is likely a loose Line wire or a faulty Circuit Breaker, an electrician may be needed to further diagnose any power issues.
Ensure the battery is seated properly (if Applicable)
If your RUM unit was supplied with a battery, ensure the battery is set properly between the metal battery plates and there is a good connection, batteries may have come with a plastic tab preventing connection or may have shifted loose in shipping.
After completing the earlier steps, press the small reset button on the PCB
The button location is shown for both the RUMnano and the RUMnanoPro, respectively. Simply tap this button and the device will try to join the Marinesync network. It may take several attempts for the handshake to succeed.

If after following the above troubleshooting steps the RUM unit is still not communicating it is recommended to contact Marinesync for further troubleshooting.

If the RUMnano Is Not Reporting Usage (or Reporting Incorrect Usage)

Ensure the Meter’s ISO output (recommended) or the counter output is connected to the RUMnano
Both the RUMnano and RUMnanoPro have 4 inputs that can be used for metering applications. These inputs are labeled “INx” where “x” is an integer from 1 to 4. The meter outputs will have two wires, one of these wires will be the Signal+ which will go to one of the inputs, the other wire will be ground or Signal- which will connect to a ground pin on the RUMnano or RUMnanoPro, these pins are labeled “GND”, “COM”, or “⊥”. Note which input is being used as this is VITAL information for ensuring that the Marinesync portal is setup properly. We recommend using a multimeter in continuity mode to ensure there is a solid connection between the Meter and the Rum unit.
Ensure the Meter is powered on with the proper reference voltage
All electric meters require power and a reference voltage to measure power usage. For instance: a 240V meter requires an L1 and L2 reference voltages and a neutral. A photo of an EZ-Meter AC wiring is below for reference.

Most meters have a “power” LED that will light to let you know that the meter is powered properly. If the wiring is done properly but the LED is still not lit the voltage should be checked with a multimeter (in AC Voltage Mode). If the AC voltage is not correct or zero then there is likely a loose wire or a short in the run to the pedestal, an electrician will likely be required to further diagnose that issue. If the meter is powered and wired properly then move on to the next step.
Ensure the Meter Resolution matches the Resolution on the Marinesync portal
The electric meter resolution is often 0.01 KW, 0.1 KW, or 1 KW per pulse. This means that for every X KW used the meter sends out a single pulse. The resolution set on the Marinesync portal must match the meter resolution for the correct usage to be reported on the portal. The resolution on the portal can be seen by the precision of the reading shown on the site. For instance, the resolution of the portal image shown above is 0.1 KW as the reading is precise to 0.1.
Run a Load on the Meter to Test the Install
Using a Load Generator such as a Resistive Bank, or a Heat Gun; draw a relatively known load (i.e. 1 KW) and ensure the Marinesync portal shows 1 KW of usage. One way to know the power being drawn is to watch the meter as the load is applied, most meters have an indicator light which blinks every 0.01 KW. The power draw that causes the light to blink is different from meter to meter, so be sure to check this as it’s often listed on the meter. Check the Marinesync portal and update the RUMnano’s reading to ensure that it is seeing the pulses.

If the portal is still not recording the pulses properly after following these steps contact Marinesync for further troubleshooting. Here is the needed info for Marinesync to accurately diagnose the issue:

The Serial number of the RUMnano
The inputs of the RUMnano used
The Brand of Electrical Meter
The resolution of the Meter
The Serial Number of the Meter