15.2 Errors without event messages
The causes of the following errors cannot be controlled by the device. Therefore the device does not
display an event message when one of these errors occurs.
Error Possible cause Solution
No display Battery voltage too low Pre-charge the battery
External fuse for the battery has
triggered
Replace the external fuse for the
battery or reset it.
Battery is not connected
1. Unclamp all connections.
2. Connect (a new) battery with the
correct polarity.
3. Reconnect the solar module and
loads.
Battery is defective
Load cannot be oper-
ated or only for a
short time
The deep discharge protection has
switched off the output due to an
excessively low battery voltage.
Charge the battery.
Load cannot be ope-
rated
External charging sources are not
voltage-limited
Q Check the external charging
source.
Q Switch off external charging
sources if necessary.
Load incorrectly connected or
faulty
Q Connect load correctly.
Q Replace load.
Battery is not charged Solar module not connected Connect the solar module.
Short circuit at solar module con-
nection
Rectify short circuit.
Incorrect solar module voltage Use a solar module of a suitable
voltage.
Solar module defective Replace the solar module.
Battery current value
in the status display
changes suddenly
Large pulse current Tune the current consumption to
match the battery capacity.
Battery is defective Replace the battery.
appears in the
status display while the
sun is shining
Battery voltage too high Check the installation.
flashes in the
status display
Pre-warning of deep discharge pro-
tection; this symbol is displayed
when
Q SOC < (Deep discharge pro-
tection load + 10 %) or
Q Battery voltage < [(Deep dis-
charge protection load +
(0.05 V x number of battery
cells)].
Q Charge the battery.
Q Set the switch-off threshold of
the Load deep discharge pro-
tection under ‘Main menu’
‘Output settings’ ‘Load’
‘Low volt. discon. - LVD’
‘Disconnection thresh.’
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