Victron energy MPPT 75/10 Manuel page 11

4. Troubleshooting
Problem Possible cause
Reversed PV connection
Charger does
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 (models 75/10,
75/15, 100/15) or 25A fuse
(model 100/20)
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
Set the controller manually to
the required system voltage
(see section 1.9)
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
9