Faults - Kaco Powador 7700 Operating Instructions Manual

Maintenance/Troubleshooting
Authorised electrician
9.4

Faults

9.4.1 Procedure
DANGER
Lethal voltages are still present in the terminals and cables of the inverter even after the
inverter has been switched off and disconnected.
Severe injuries or death may occur if the cables and terminals in the inverter are touched.
" When a fault occurs, notify an appropriately authorised and qualified electrician 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.
9.4.2 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
The display is blank Grid voltage not
and the LEDs do not available
light up.
The inverter stops Faulty grid sepa-
feeding into the grid ration relay in the
shortly after being inverter.
switched on, even
though there is sun-
light present.
Grid-feed is inter-
The inverter is active
rupted due to a
but is not feeding
grid fault.
into the grid. The
display indicates a
line failure.
Table 7: Troubleshooting
Operating Instructions for Powador 7700-9600_EN
Explanation/remedy
" Check whether the DC and AC voltages are within the
permitted limits (see Technical Data).
" Notify KACO Service.
If the grid separation relay is defective, the inverter will rec-
ognise this during the self-test.
" Ensure that there is sufficient PV generator power.
" If the grid separation relay is defective, have it replaced
by KACO Service.
" Notify KACO Service.
Due to a grid fault (over/undervoltage, over/underfre-
quency), the inverter stopped the feed-in process and dis-
connected from the grid for safety reasons.
" Change the line parameters within the permitted oper-
ating limits (see the "Start-Up" section).
EN
By
E
E
E
E
E
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