Make sure no block on air-flow around the controller. Clear up any dirt and fragments on radiator.
Check all the naked wires to make sure insulation is not damaged. Repair or replace some wires if
necessary.
Tighten all terminal screws to the indicated torque; Inspect for loose, broken, or burnt cable/wire
connections.
Check and confirm that LCD is consistent with required. Pay attention to any troubleshooting or error
indication. Take corrective action if necessary.
Make sure all system components are effectively and tightly connected to ground.
Check all terminals for any corrosion signs, damaged insulation, increased temperature or
carbonization/discolored signs.
Check for any dirt, nesting insects and any corrosion signs. Implement corrections actions as early as
possible.
7.2 Protection
PV Short Circuit
PV Reverse Polarity
PV Over Current
The controller will limit charging power to the rated level.
Over-sized PV array will not be able to operate at maximum power point.
When PV short circuit occurs, the controller will stop charging.
Remove it to resume normal operation.
Fully protection against PV reverse polarity, no damage to the controller.
Correct the connection to resume normal operation.
Fully protection against battery reverse polarity, no damage to the controller.
Correct the connection to resume normal operation.
Should there are other energy sources to charge the battery, when the battery
voltage exceeds 15.8 / 31.3V(Overcharge protection voltage of lithium battery
equals target voltage plus 0.2V), the controller will stop charging to protect the
battery from overcharging damage.
When battery voltage drops to the low voltage disconnect setting, the controller
will stop discharging to protect the battery from over discharging damage.
If the load current exceeds the maximum load current rating 1.25 times, the
controller will disconnect the load.
Once the load short circuit happens , the load short circuit protection will
trigger automatically.
The controller detects the internal temperature through internal sensor, when
the temperature exceeds the setting value, the charging current will decrease,
and consequently, the controllers temperature; Should controllers temperature
rise and approach over temperature protection threshold, the controller will
stop its operation and resume after temperature lowers/returns to an
acceptable level.
Should the temperature sensor be short-circuited or damaged, the controller
will be charging or discharging at the internal temperature automatically to
prevent the battery damaged from overcharging or over discharged.
Protection
Description
Battery Reverse Polarity
Battery Over voltage
Battery Over discharge
Load Over Current
Protection
Load Short Circuit
Protection
Over Temperature
Protection
Damaged Remote
Temperature Sensor
WARNING：Risk of electric shock!
Make sure that all the power is turned off before above operations,
and then follow the corresponding inspections and operations.
7.3 Maintenance
For best system performance, the following inspections and maintenance tasks are recommended to be
carried out for at least two times a year.
15
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