Victron energy MPPT 75/10 Manuel page 9

4. Troubleshooting
Problem
Charger does
not function
Blow n fuse
The battery is
not fully charged
The battery is
being
overcharged
Load output
does not
become active
Possible cause
Reversed PV connection
No fuse inserted
Reversed battery
connection
A bad battery connection
Cable losses too high
Large ambient temperature
difference between charger
and battery (T
ambient_chrg
T )
ambient_batt
Only for a 24V system:
w rong system voltage
chosen (12V instead of 24V)
by the charge controller
A battery cell is defect
Large ambient temperature
difference between charger
and battery (T
ambient_chrg
T )
ambient_batt
Maximum current limit
exceeded
DC load in combination w ith
capacitive load (e.g.
inverter) applied
Short-circuit
Solution
Connect PV correctly
Insert 20A fuse
1. Connect battery correctly
2. Replace fuse
Check battery connection
Use cables w ith larger cross
section
Make sure that ambient
conditions are equal for
>
charger and battery
Disconnect PV and battery,
after making sure that the
battery voltage is at least
>19V, reconnect properly
Replace battery
Make sure that ambient
conditions are equal for
<
charger and battery
Make sure that the output
current does not exceed 15A
Disconnect DC load during
start-up of the capacitive load
Disconnect AC load from the
inverter, or connect inverter as
explained in section 3.6
Check for short-circuit in the
load connection
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