Kaco Powador 3200 Operating Instructions Manual page 16

Sec tio n 5 · T rou ble shooti ng
Fault
The inverter stops
supplying power to the
grid shortly after being
switched on, even
though there is suffi -
cient sunlight.
The line fuse trips.
Noise emission from the
inverter.
In spite of high insola-
tion, the inverter does
not feed in the maxi-
mum power into the
low-voltage grid.
Additional devices that
are connected via the
potential-free contact
suddenly start up, even
though the "Relay 33"
function is deactivated
and the inverter indicates
an error.
Table 5.1: Troubleshooting
Operating Instructions Powador 3200 / 4400 / 5300 / 5500 / 6600_EN
Cause of fault
Faulty grid separation relay
in the inverter.
–
The line fuse capacity is
too low.
–
Damage to the inverter's
hardware.
Particular ambient
conditions
Power Boost mode is
activated.
The device is too hot and
the power is reduced.
The potential-free contact
connects to indicate an
error.
Remedy/explanation
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 separa-
tion relay is presumably faulty, thus preventing the inverter
from connecting. Please contact your solar installer.
In cases of high insolation, 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 some-
what higher than the maximum feed-in current.
If the line fuse immediately trips when the inverter switches to
feed-in mode (after the start-up period is complete), the invert-
er's hardware is probably damaged. Contact your solar installer.
When there are certain ambient conditions, the units may emit
audible noises. The following causes may be determining fac-
tors in this regard:
–
Line interference or line failure caused by particular loads
(motors, machines, etc.) which are either connected to the
same point on the grid or located in the vicinity of the
inverter.
–
In cases of dynamic weather conditions (frequent switching
between sunny and cloudy conditions) or strong insolation,
a light hum may be audible due to the increased power.
–
With particular grid conditions, resonances may form between
the unit's input fi lter and the grid, which may be audible even
when the inverter is switched off.
–
People with very sensitive hearing (particularly children) may be
able to hear the high-frequency hum caused by the inverter's
operating frequency of approximately 17 kHz.
Such noise emissions do not affect the operation of the inverter.
Nor can they lead to loss of effi ciency, failure, damage or to a
shortening of the unit's service life.
When Power Boost mode is activated, noise emission is normal.
The Power Boost mode should be activated only in environ-
ments where the operating noise is acceptable.
The temperature inside the unit became too high. The inverter
reduced the power to prevent damage to the unit. Starting
from an internal temperature of 75°C, the inverter limits the
power and levels off between 75°C and 80°C. An internal tem-
perature of 85°C is only reached if convection cooling is
impeded by external factors, e.g. by covering the cooling fi ns.
Provide for suffi cient cooling of the unit.
If the "Relay 33" function is not activated, the potential-free
contact functions as a fault signal relay and therefore indicates
errors. However, if additional devices that are provided for the
"Relay 33" function are connected to the inverter via the con-
tact, they can still start up when the inverter experiences an
error, because the contact is connected at that point in time. If
you deactivate the "Relay 33" function, we recommend that
you disconnect devices from the inverter that were connected
for this function.
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