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730927 | Z03 | 1242
7. Faults and remedies
Fault Cause Remedy
No display •Battery voltage too low
X Pre-charge the battery
•The external fuse in the
battery connection cable
has blown.
X Replace the external fuse
•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
•Battery is connected with
the wrong polarity
Device may be defective;
Return device to specialist
dealer
Info LED flashes
red
•Charging interrupted due to
excessive charging current
Charging automatically
continues as soon as the
charging current lies within
the permissible range
•Optobus transfer faulty Repeat programming
•Battery voltage too low Pre-charge the battery
•Battery voltage too high Check installation
Load cannot be
operated or only
for a short time
+
info LED flashes
red
•Load output is switched
off due to excessive load
current
X Reduce load current, if
necessary switch off or
disconnect loads
X Check loads
•Load output is switched off
due to short circuit at load
output
1. Disconnect loads
2. Correct the cause of the
short circuit
3. Reconnect loads
•Load output is switched off
due to overheating of the
solar charge controller
The load output automati-
cally switches on again once
the solar charge controller
has cooled down
X Improve the cooling air
circulation
X Remove any other heat
sources
X Check the conditions of use
and the mounting location
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