Kaco Powador 2002 Operating Manual page 46

Maintenance/Troubleshooting
Authorised electrician
Fault
Cause of fault
The grid fuse The grid fuse
trips. capacity is too low.
The grid fuse Damage to the
trips. inverter's
hardware.
Daily yields do Tolerances of
not correspond to the measuring
the yields on the elements in the
feed-in meter. inverter.
The inverter is • Generator volt-
active but does age too low
not feed into
• Grid voltage or
the grid. Dis-
PV generator
play: "Waiting for
voltage unsta-
feed-in"
ble.
Noise emission Particular ambient
from the inverter. conditions.
Table 6: Troubleshooting
Page 46
Explanation/remedy
In cases of high solar radiation, the inverter exceeds its rated
current for a short period, depending on the PV generator.
 Select the capacity of the inverter's pre-fuse to be some-
what higher than the maximum feed-in current (see the
"Installation" section).
 Contact the grid operator if the grid failure continues to
occur.
If the line fuse trips immediately when the inverter goes into
feed-in mode (after the start-up period is complete), the invert-
er's hardware is probably damaged.
 Contact KACO Service to test the hardware.
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 PV generator voltage or power is not suffi cient 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 diff ers by country according to applicable standards
and regulations and can take several minutes.
• The starting voltage may have been set incorrectly.
 Adjust starting voltage in the Parameter menu if required.
When there are certain ambient conditions, the units may emit
audible noises.
• Grid interference or grid 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 volatile weather conditions (frequent switching
between sunny and cloudy conditions) or strong solar radia-
tion, a light hum may be audible due to the increased power.
• Under certain 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 .
These noise emissions do not aff ect the operation of the
inverter. They do not lead to loss of effi ciency, failure, damage
or to a shortening of the unit's service life.
People with very sensitive hearing (particularly children) are
able to hear the high-frequency hum caused by the inverter's
operating frequency of approximately 17 kHz.
 No action
Operating Instructions for Powador 2002-6002_EN
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