Operating Instructions Powador 2500xi / 3600xi / 4000xi / 4500xi / 5000xi_EN Page 15
Section 5 · Troubleshooting
5 Troubleshooting
In line with our ever-growing quality assurance system, we endeavour to eliminate all errors and faults. You have purchased a product
which left our factory in proper condition. Endurance tests as well as extensive tests for the purpose of assessing the operating perform-
ance and the protective equipment have been successfully undertaken with each individual unit.
If your photovoltaic installation does not function properly, we suggest the following troubleshooting procedures:
The fi rst step is to check that the solar generator 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 display indications
and LED displays.
The following faults may occur and should be remedied as described.
Fault Cause of fault Troubleshooting / explanation
Inverter displays an
impossible daily peak
value
Faults in the line voltage. Inverter continues to operate as normal without losses to the
yield, even when an erroneous daily peak value is displayed.
The value is reset overnight. To immediately reset the value, the
inverter must be switched off, disconnected, reconnected and
switched on again.
Daily energy yields do
not correspond with the
yields on the grid opera-
tor’s grid feed meter
Measuring elements’ tole-
rances in the inverter
A measurement error occurs due to the measuring elements’
tolerances. The daily energy yield may deviate from the yield
on the grid feed meter by up to 15 %, and even more in cases
of low insolation.
The line fuse trips
– The line fuse capacity is
too low
– Damage to the inverter’s
hardware
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.
The line fuse immediately trips if the inverter switches to grid
feed mode (after the start-up period is complete). In such a
case, there is damage to the inverter’s hardware. Should this
be the case, the unit must be repaired by KACO new energy
GmbH.
The display is blank
– The unit is in night
shutdown mode
– There is no line voltage
– The solar generator
voltage is lower than
300 V
– DC switch is at “0”
The inverter switches off overnight. If the display does not light
up during the daytime, check the grid feed meter to see if the
grid is nevertheless being fed into. If the grid is being fed into,
the display module is faulty. The inverter must be repaired by
KACO new energy GmbH. If the grid is not being fed into,
check to see if there is any line voltage and if the solar genera-
tor voltage is greater than 300 V. If both are the case and the
display is still blank, the unit must be repaired by KACO new
energy GmbH.
The inverter does not
start up, LED (1) is off
– The unit is in night shut-
down mode
– There is no line voltage
– The solar generator
voltage is lower than
410 V
– DC switch is at “0”
The inverter switches off overnight. The display and all three
LEDs are off. If the inverter does not start up during the day-
time, check to see if there is any line voltage and if the solar
generator voltage is greater than 410 V. If both are the case and
the inverter still does not start up, the unit must be repaired by
KACO new energy GmbH.
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