Maintenance/Troubleshooting
Page 44
Operating Instructions for Powador 7700-9600_EN
EN
EN
Authorised electrician
Fault
Cause of fault
Explanation/remedy
By
The grid fuse trips.
The grid fuse
capacity is too
low.
In cases of high solar radiation, the inverter exceeds its
rated current for a short period, depending on the PV gen-
erator.
"
Select the capacity of the inverter’s pre-fuse to be
somewhat higher than the maximum feed-in current
(see the “Installation” section).
E
"
Contact the grid operator if the grid failure continues to
occur.
E
Damage to the
inverter’s hard-
ware.
If the line fuse trips immediately when the inverter goes
into feed-in mode (after the start-up period is complete),
the inverter’s hardware is probably damaged.
"
Contact KACO Service to test the hardware.
E
The inverter displays
an impossible daily
peak value.
Faults in the grid.
The inverter continues to operate as normal without losses
to the yield, even when an erroneous daily peak value is
displayed. The value is reset overnight.
"
To reset the value immediately, switch the inverter off
by disconnecting it from the grid and switching off the
DC, then switch it back on.
E
Daily yields do not
correspond to the
yields on the feed-in
meter.
Tolerances of
the measuring
elements in the
inverter.
The measuring elements of the inverter 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 %.
"
No action
-
The inverter is active
but is not feeding
into the grid. Display:
"Waiting for feed-in"
•
Generator volt-
age 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 parameters before the feed-in
process begins. The length of time it takes to switch back
on again differs by country according to applicable stand-
ards and regulations and can take several minutes.
•
The starting voltage may have been set incorrectly.
"
Adjust starting voltage in the Parameter menu if
required.
K
In spite of high
radiation levels, the
inverter does not
feed the maximum
power into the grid.
The device is
too hot and the
system limits the
power.
Because the temperatures inside the unit are too high, the
inverter reduces its power to prevent damage to the unit.
Note the technical data. Ensure that the convection cooling
is not impeded from the exterior. Do not cover the cooling
fins.
"
Ensure sufficient cooling of the unit.
"
Do not cover the cooling fins.
B, E
Table 7:
Troubleshooting
