Troubleshooting - Victron energy MPPT 75/10 Manual

4. Troubleshooting

Problem Possible cause
Charger does Reversed PV connection
not function
No fuse inserted
Reversed battery
Blown fuse
connection
A bad battery connection
Cable losses too high
Large ambient temperature
difference between charger
The battery is and battery (T
T
not fully charged
Only for a 24V system:
wrong system voltage
chosen (12V instead of 24V)
by the charge controller
A battery cell is defect
The battery is
Large ambient temperature
being
difference between charger
overcharged
and battery (T
T
Maximum current limit
exceeded
Load output
DC load in combination with
does not
capacitive load (e.g.
become active
inverter) applied
Short-circuit
ambient_chrg
)
ambient_batt
ambient_chrg
)
ambient_batt
Solution
Connect PV correctly
Insert 20A fuse
1. Connect battery correctly
2. Replace fuse
Check battery connection
Use cables with 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
7