11.6.2 Rectifying faults
B = Action of the operator; E = The indicated work may only be carried out by an authorized electrician! ; K =
The indicated work may only be carried out by a service employee of KACO new energy GmbH!
Fault
Possible cause
Explanation/remedy
By
The LEDs do not light up Grid voltage not avail-
able
› Check whether the DC and AC voltages are within the permit-
ted limits (see Technical Data)
E
› Notify KACO Service.
E
The device stops feeding
into the grid shortly af-
ter being switched on,
even though there is
sunlight present.
Defective circuit-break-
ers in the device
If the circuit-breakers are defective, the device will recognize
this during the self-test.
K
› Ensure that there is sufficient PV generator power.
› If the grid separation relay is defective, have it replaced by
KACO Service.
› Notify KACO Service.
E
Device is active but not
connected to the grid. A
grid fault is displayed on
the status LED.
Grid-feed is interrupted
due to a grid fault.
Due to a grid fault (over/undervoltage, over/underfrequency),
the device stopped the feed-in process and disconnected from
the grid for safety reasons.
› Change the grid parameters within the permitted operating
limits (see the "Start-Up" section).
E
The grid fuse trips.
The grid fuse capacity is
too low.
In case of a high level of solar radiation, the inverter exceeds its
rated current for a short period, depending on the PV genera-
tor.
› Select the capacity of the device’s pre-fuse to be somewhat
higher than the maximum feed-in current (see the "Installa-
tion" section).
E
› Contact the grid operator if the grid failure continues to oc-
cur.
E
The grid fuse trips.
Damage to the device's
hardware.
If the grid fuse trips immediately when the device goes into
feed-in mode (after the start-up period is complete), the de-
vice’s hardware is probably damaged.
› Contact KACO Service to test the hardware.
E
The device is displaying
an impossible daily peak
value.
Faults in the grid.
The device continues to operate as normal without losses to
the yield, even when an erroneous daily peak value is dis-
played. The value is reset overnight.
› To reset the value immediately, switch the device off by dis-
connecting it from the grid and switching off the DC, then
switch it back on.
E
Daily yields do not corre-
spond to the yields on
the feed-in meter.
Tolerances of the mea-
suring elements in the
device.
The measuring elements of the device have been selected to
ensure maximum yields. Due to these tolerances, the daily
yields shown may deviate from the values on the feed-in meter
by up to 15%.
E
› No action.
Device is active but not
connected to the grid.
Generator voltage too
low; grid voltage or PV
generator voltage unsta-
ble.
The PV generator voltage or power is not sufficient for feed-in
(solar radiation is too low). The inverter checks the grid param-
eters before the feed-in process begins. The length of time it
takes to switch back on again differs from country to country,
depending on applicable standards and regulations, and may
be several minutes. The starting voltage may have been set in-
correctly.
› Adjust starting voltage in the Parameters menu if required.
E
› No action
Manual
Maintenance and troubleshooting | 11
KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
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