Solar MPPT-10 - 5.4 Common Faults and Solutions

15
6.1 Protection Remedies
Fault
Phenomenon
Cause / Remedy
Battery
voltage
too low
Load off
Charging on
Check the battery voltage and manually
recharge the battery if necessary. Loads
directly connected to the battery can cause
deep discharge.
Battery
voltage
too high
Load off
Charging off
Check installation. Check the battery
voltage and check any additional charging
sources if present.
PV voltage
too high
Load on
Charging off
Check the PV system configuration. The PV
open circuit voltage increases while the
ambient temperature decreases.
Excessive
load current
Load off
Charging on
Reduce the load current at the load output.
The load may cause current peaks.
Load output
short circuit
Load off
Charging on
Rectify short circuit. Disconnect and
reconnect the load.
Controller
inside
temperature
too high
Load on
Charging off
Allow the controller to cool down. Check for
possible causes of overheating (mounting
location, other heat sources). Possibly
reduce the charge current. Make sure the
controller is adequately ventilated.
Inside
temperature
sensor
error
Load on
Charging on
Disconnect the load, solar modules and
battery. Re-install the controller. If the error
recurs, then please contact your specialist
dealer.
Self-test
error
Load,
charging
indefinite
Disconnect the load, solar modules and
battery. Re-install the controller. If the error
recurs, then please contact your specialist
dealer.