6 Operation
Kaco Gerätetechnik GmbH 13 Operator’s Instructions Powador
6 Troubleshooting
Within the scope of our continuously expanding Quality
Assurance System, our goal is to rule out and eliminate
any faults and defects. You have purchased a product
that has left our factory in a proper condition. Each
individual device has successfully passed extensive
inspection tests for proper operation and functioning of
protective devices, as well as a long-duration test at our
factory.
Should your PV installation not work properly despite all
these measures, we recommend the following
procedure for remediation:
Check the solar generator and grid connections leading
to the Powador, observing all the safety instructions
given in this manual. Please observe the inverter
carefully and take note of the display messages and
LED displays.
Below is a summary of possible error and
recommended remedies:
Error Cause Remedy/Explanation
Inverter shows an
unrealistic daily peak
value
Grid voltage failure Even if an incorrect daily peak value is displayed the inverter
continues to work properly and without any yield losses. Values
are reset overnight. If you wish to reset the display immediately,
disconnect the inverter and the DC grid voltage supply and
switch on the inverter again.
Daily yield values do not
correspond to the values
shown on the power
meter of the Utility
company.
Tolerances of the
inverter’s internal
measuring elements
Measuring errors are caused by tolerances of the measuring
elements. The tolerances of the individual measuring values are
shown in Table 4-3, Display Operation and Settings. The daily
yield value may deviate from the value shown on the power
meter by up to 15%.
No display shown Device is in the night shut-
down mode
No grid voltage is present
Solar generator voltage is
less than 110V
The inverter shuts down over night.
If the display should not be illuminated during a normal time of
the day you should check on the power meter whether or not
the device delivers power. If power is delivered the display
module is defective, and the inverter has to be returned to
KACO for repair.
If no power is delivered you should check that grid voltage is
present and that the solar generator voltage is higher than 125
V.
If this is the case but the inverter still fails to deliver power the
device has to be returned to KACO for repair.
Inverter does not start Device is in its night shut-
down mode
No grid voltage is present
The solar generator
voltage is less than 125 V
The inverter shuts down over night.
If the display should not be illuminated during a normal time of
the day you should check on the power meter whether or not
the device delivers power. If power is delivered the display
module is defective and the inverter has to be returned to
KACO for repair.
If no power is delivered you should check that grid voltage is
present and that the solar generator voltage is higher than 125
V.
If this is the case but the inverter still fails to deliver power the
device has to be returned to KACO for repair.
Inverter is active but
does not deliver power –
the display reads: Start
from 125 V
Measurement:
xxx V
Insufficient generator
voltage. Voltage
measured < 125V
After sunrise, at sunset, and during times of low insolation due
to bad weather conditions the generator voltage or,
respectively, generator power fed from the roof may be
insufficient for grid feeding
Inverter is active but
does not deliver power –
the display reads:
Start from 125 V
Measurement:
xxx V (measured voltage
is higher than 125V)
The inverter has
interrupted grid feeding
due to a
malfunction/disturbance.
After an interruption of grid feeding due to a malfunction (grid
power failure, overtemperature, overload, etc.) the inverter
always waits for approx. 3 minutes before resuming its grid
feeding operation. Grid failures may cause interruptions during
the day. If more than 10 interruptions should occur over several
weeks you should contact your solar installation provider.
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