Fault
Possible cause
Explanation/remedy
By
In spite of high radiation
levels, the inverter does
not feed the maximum
power into the grid.
Particular ambient con-
ditions.
Because the temperatures inside the device are too high, the
device reduces its power to prevent damage to the device.
Note the technical data. Ensure that the convection cooling is
not impeded from the exterior. Do not cover the cooling fins.
› Ensure sufficient cooling of the device.
B
Remove any foreign bodies which are present on the unit.
B
› Clean the cooling fins
E
DC fuse defective
A generator string is disconnected from the device owing to a
faulty fuse. Check why it has tripped by measuring all DC
strings using a clip-on ammeter. If there is no current flow in a
string, the associated DC fuse is faulty.
Check the no-load voltage and dimensioning of the PV gener-
ator. Replace any damaged modules.
B, E
› Replace the PV fuse with a fuse of the same size and type.
Tab. 8:
Troubleshooting
B = Operator’s responsibility ; E = The indicated work may only be carried out by an authorised electrician. ; K = The indic-
ated work may only be carried out by a service employee of KACO new energy GmbH!
12.7
Fault messages
Many fault signals indicate a fault in the grid. They are not operational faults of the device. The triggering levels are
defined in standards, e.g. VDE0126-1-1. The device shuts down if the values exceed or fall below the approved levels.
Fault LED (red)
Status
Explanation
LED
FS (fault status)
Fault signal relay has been tripped.
To:
Feed-in was ended due to a fault.
OS (operating status)
The fault relay releases again.
Off
The device feeds back into the grid again after a country-
specific time period.
12.8
Troubleshooting
The following table lists the possible status and fault messages, the ProLog© status messages that the device can display
by means of the LC display / web interface and the LEDs.
No. Grid
LED
LED
Display
Status description
Action
Pers
.
1
Waiting for feed-in
The start voltage (pre-)set in the device is
higher than the actual voltage. The device
waits for the solar voltage to exceed an ad-
justable value and for a stable grid.
Check whether the
start voltage was
set too high in the
menu.
B
2
Generator-Spannung zu
niedrig Batterie-Spannung
zu niedrig
Insufficient generator voltage and power,
status before the transition to night shutdown.
Insufficient DC
voltage or voltage
fails under load (in-
sufficient DC power)
a) Compare the
voltage measured
with the no-load
voltage expected. b)
Check if the DC isol-
ator switch is
switched off c)
Check whether a D
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Powador 30.0-72.0 TL3
Page 76
EN
