Troubleshooting - Victron energy MPPT 150/45-MC4 Manual

4. Troubleshooting

Problem
Charger does not
function
The battery is not fully
charged
The battery is being
overcharged
Possible cause
Reversed PV connection
Reverse battery
connection
A bad battery connection
Cable losses too high
Large ambient
temperature difference
between charger and
battery (T
ambient_chrg
T )
ambient_batt
Wrong system voltage
chosen by the charge
controller
A battery cell is defect
Large ambient
temperature difference
between charger and
battery (T
ambient_chrg
T )
ambient_batt
15
Solution
Connect PV correctly
Non replacable fuse
blown.
Return to VE for repair
Check battery
connection
Use cables with larger
cross section
Make sure that
ambient conditions
are equal for charger
>
and battery
Set the controller
manually to the
required system
voltage (see section
1.10)
Replace battery
Make sure that
ambient conditions
are equal for charger
<
and battery