eddiTroubleshooting

  1. Symptom Recognition
  2. Fault Codes

1. Symptom Recognition

Symption Cayse Solution
Display is blank and power-on (green) indicator is NOT illuminated    –   The bypass switch is in the off position

–   There is no power to the unit

   –   Switch the bypass switch (at the bottom of the unit) to the ON position

–   Check for correct supply voltage at the supply screw terminals (220 – 250V AC)

Display is blank, the power-on indicator (green) is NOT illuminated and Heater 1 indicator (blue) is lit    –   The unit is in bypass mode    –   Switch the bypass switch (at the bottom of the unit) to the on position
Display is blank and power-on indicator (green) is illuminated    –    Possible faulty unit    –   Contact your local Technical Support
–   In the meantime, the bypass switch can be used to operate heater if needed
Heater not getting hot, yet display shows Max Temp Reached and the heater output indicator (blue) is lit    –   Heater thermostat is open

–   Heater isolation switch is off

–   Heater element is faulty

   –   Check heater thermostat is closed – i.e. run off some hot water

–   Use the bypass switch to test the heater

Not using any surplus power and the display is always showing Waiting for Surplus and the export power is 0W    –   Grid Sensor incorrectly installed

–   Faulty Grid Sensor

–   No signal from harvi (if used)

   –   Check the grid sensor is connected to CT1 terminals of the eddi or harvi

–   Check the Grid Sensor is installed on the correct cable – see Grid CT

–   Check resistance of the sensor – it should be around 200 Ώ when not connected (remove the sensor from the cable before testing resistance)

–   If using harvi, check that the CT input has been set to Grid in the harvi settings (under Devices in the eddi menu)

Not using any surplus power and display is always showing Waiting for Surplus, yet the export power is displayed correctly    –   Export Margin set too high    –   Check Export Margin setting (default is 0W)
The power diverted to the heater is less than expected    –   Heater has a lower rating than expected

–   The unit is too warm and is thermal limiting the output, (indicated by three wavy lines above the eddi icon)

   –   Check heater rating

–   Ensure the unit has adequate ventilation

The savings are less than expected (the diverted energy is low)    –   Uncontrolled thermal input from other sources (e.g. gas boiler)    –   Install or adjust controls for the auxiliary heat source
RCD tripping    –   Live and neutral currents to heater are out of balance    –   Ensure the heater neutral conductor is connected to “N” terminal of the “Heaters” screw terminal block in the eddi; do not use any other neutral
MCB tripped or supply fuse blown    –   Possible faulty unit    –   Contact your local Technical Support

–   In the meantime, the bypass switch can be used to operate heater if needed

2. Fault Codes

Fault Code Displayed Message Description Check
1 Output Overload! Load is drawing too much current (>16A) Check the power rating of connected heaters, the maximum rating is 3.7kW for each heater output
2 Overheat! The device is too hot Check ventilation slots are not blocked and the unit has sufficient space around it – see Clearances
3 No Signal! Signal lost from harvi device Check harvi LED is blinking; if not, check sensors are securely clamped around the cable and properly connected to the terminals in the harvi

Note: harvi will stop working if there is no power in the cable being monitored, however eddi will show this message only if there is no signal from harvi for more than 24hrs

4 Grid Sensor Error! Grid Sensor incorrectly installed Check the sensor is securely installed on the correct cable and is wired to the CT terminals with the correct polarity

Refer to Grid CT for details of correct installation

5 Back-Feed Voltage! Unexpected voltage at heater output The heater output terminals must never be connected to a supply voltage

Check heater wiring

6 Over Voltage! Supply voltage too high The AC supply voltage must be less than 260V

Check the AC voltage at SUPPLY terminals

7 Under Voltage! Supply voltage too low The AC supply voltage must be more than 190V

Check the AC voltage at SUPPLY terminals

8 Load Fault! Load is faulty Check the power rating of connected heaters, the maximum rating is 3.7kW for each heater output

Isolate the unit from the supply and check the resistant between L1 and N and between L2 and N at the HEATER terminals; the resistance should be between about 15 Ώ and 350 Ώ.

Note: Around 18-20 Ώ is normal for an immersion heater.