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10.
Troubleshooting
Symptom
Cause
Solution
Display is blank
There is no power to
the unit
Check for correct supply voltage at the
supply screw terminals (220 - 260V AC)
In ECO+ mode, the
charge does not
start, 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 a CT
terminal in the
zappi
or any CT input in the
harvi
Check the Grid CT sensor is installed on the
correct cable (see CT Sensor Installation on
page 47)
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
Linked Devices / Devices in the
zappi
Advanced Settings menu)
In ECO+ mode, the
charge does not
start, the display is
always showing
Waiting for Surplus
,
yet the export power
is showing correctly
Export Margin set
too high
Check Export Margin setting (default is 0W)
Generation power is
always 0kW
Generation CT not
installed
Install generation sensor and connect to
one of the CT inputs
Alternatively, if there is no Generation CT,
the Generation and House consumption
figures can be hidden on the main screen by
changing the Icons setting in the Settings /
Display & Sound menu
Installation Limit !
displayed
Display will show the
phase(s) that is(are)
overloaded and the
prospective current
that would be drawn
if the
zappi
were
allowed to start
charge at the
minimum current
The measured Grid
Current is greater
than the Grid Limit
set in the
zappi
Check the Grid Limit setting
Reduce the load in the property
In a three phase installation, consider
rebalancing the property load across the
three phases
Installation Limit !
CT displayed
The Grid CT has
become
disconnected or is
not clamped
correctly around the
grid supply cable
Check CT is installed correctly.
Summary of Contents for ZAPPI-2H07TB
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