Maintenance/Troubleshooting
Operating Instructions for Powador -_EN Page
Authorised electrician
Shutting down the inverter
. Switch o the grid voltage by turning o the external circuit breakers.
. Disconnect the PV generator using the DC disconnect.
DANGER! The DC cables are still live.
Ensure that there is no voltage present on the grid connection terminals.
. Faults
.. Procedure
DANGER
Lethal voltages are still present in the terminals and cables of the inverter even after the
inverter has been switched o and disconnected.
Severe injuries or death may occur if the cables and terminals in the inverter are touched.
When a fault occurs, notify an authorised electrician approved by the supply grid operator or
KACO new energy GmbH Service.
The operator can only carry out actions marked with a B.
In case of power failure, wait for the system to automatically restart.
Notify your electrician if there is an extended power failure.
.. Troubleshooting
B = Action of the operator
E = The indicated work may only be carried out by an authorised electrician.
K = The indicated work may only be carried out by a service employee of KACO new energy GmbH.
Fault
Cause of fault Explanation/remedy By
The display is
blank and the
LEDs are not light-
ing up.
Grid voltage not
available
Check whether the DC and AC voltages are within the per-
mitted limits (see Technical Data).
E
Notify KACO Service.
E
The inverter stops
feeding into the
grid shortly after
being switched
on, even though
there is sunlight
present.
Faulty grid sepa-
ration relay in the
inverter.
If the grid separation relay is defective, the inverter will recog-
nise this during the self-test.
Ensure that there is su cient PV generator power.
E
If the grid separation relay is defective, have it replaced by
KACO Service.
Notify KACO Service.
E
The inverter is
active but does
not feed into the
grid. The display
indicates a line
failure.
Grid-feed is inter-
rupted due to a
grid fault.
Due to a grid fault (grid impedance too high, over/undervolt-
age, over/underfrequency), the inverter stopped the feed-in
process and disconnected from the grid for safety reasons.
Change the line parameters within the permitted operat-
ing limits (see the “Start-Up” section).
E
Table 6: Troubleshooting
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