Kaco Powador 3200 Operating instructions manual - 8 Troubleshooting
Installation instructions Powador 3200 / 4400 / 5300 / 5500 / 6600_EN
Page 25
8 Troubleshooting
In line with our continuously expanding quality assurance system, we endeavour to eliminate all errors and faults. You have purchased
a product which left our factory in proper condition. Each individual unit has successfully passed an endurance test as well as extensive
tests for the purpose of assessing the operating behaviour and the protective equipment.
If your photovoltaic system does not function properly despite these measures, we suggest the following troubleshooting procedures:
The fi rst step is to check that the PV array and grid connections are properly connected to the Powador. In doing so, observe all the safety
instructions specifi ed in this manual. Monitor the inverter closely and, where applicable, make a note of the displays and LEDs.
The following faults may occur and should be remedied as described.
Fault
Cause of fault
Remedy/explanation
The display is blank
and the LEDs do not
light up.
– There is no grid voltage.
– The PV array voltage is
too low.
The inverter switches to night shutdown mode as soon as the PV
array voltage is below the minimum feed-in voltage for a longer
period of time. For this reason, check fi rst to see if the PV array
voltage is suffi ciently high. The inverter changes to stand-by status
once 80% of the minimum feed-in voltage is reached.
Also check the AC voltage. The permissible voltage ranges for the
feed-in can be found in the technical data.
If the display continues to remain blank, please contact KACO
new energy GmbH service.
The inverter stops
supplying power to
the grid shortly after
being switched on,
even though there is
suffi cient sunlight.
Faulty grid separation relay
in the inverter.
Although there is suffi cient sunlight, the inverter feeds into the grid
only for a few seconds before switching off again. During the short
feed-in period, the inverter shows that the power being fed into
the grid is between 0 and 5 W. If the inverter is defi nitely receiving
suffi cient generator power, the grid separation relay is presumably
faulty, thus preventing the inverter from connecting.
Please contact KACO new energy GmbH service.
The inverter is active
but does not feed into
the grid. The display
indicates a line failure.
The inverter has interrupted
the feed-in due to a line
failure.
Due to a line failure (line impedance too high, over/undervolt-
age, over/underfrequency), the inverter stopped the feed-in and
disconnected from the low-voltage grid for safety reasons. Many
grid parameters can be changed within the permissible operating
limits. More information can be found in the section “Starting
up the inverter”.
If the line failure exists for a long time, please contact the grid
operator.
The line fuse trips.
The line fuse capacity is
too low.
In cases of high irradiance, the inverter can – depending on the PV
array – exceed its rated current for a short period. For this reason,
the capacity of the inverter’s pre-fuse should be somewhat higher
than the maximum feed-in current. You can fi nd a dimensioning
of the line fuse in the section “Installation and Start-Up”.
The line fuse trips.
Damage to the inverter’s
hardware.
If the line fuse immediately trips when the inverter switches to
feed-in mode (after the start-up period is complete), the inverter’s
hardware is probably damaged.
Please contact KACO new energy GmbH service.
Table 8.1:
Reasons for faults
S e c t i o n 8 ·
T r o u b l e s h o o t i n g