Troubleshooting
Troubleshooting
Symptom
Cause
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 - 260V 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
‐
Gird 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 Sensor Installation
page
26)
‐
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
60
eddi
operation and installation manual