Kaco Powador 2002 Operating Instructions Manual page 14

Sec tio n 5 · T rou ble shooti ng
Error
The inverter stops sup-
plying 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.
Table 5.1: Troubleshooting
Operating Instructions Powador 2002 / 3002 / 4202 / 5002 / 6002_EN
Cause of error
Faulty grid separation relay
in the inverter.
–
The line fuse capacity
is too low.
–
Damage to the inverter's
hardware.
Particular ambient
conditions
The device is too hot and
the power is reduced.
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 grid feed 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 sepa-
ration 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
solar generator – 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 grid-feed current.
If the line fuse immediately trips when the inverter switches
to grid-feed mode (after the start-up period is complete), the
inverter'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 factors
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.
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
temperature 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.
Page 15