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 .
Check for any dirt, nesting insects and any corrosion signs. Implement corrections actions as early as
possible.
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.
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 the maximum power point.
When PV short circuit occurs, the controller will stop charging.
Remove it to resume normal operation.
When the PV doesn't charge, the controller will not be damaged if short-circuit
just happened in the PV array.
Warning: It is forbidden to short-circuit the PV array during charging.
Otherwise, the controller may be damaged.
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 / 31.3/62.3V(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 the battery voltage drops to the low voltage disconnect setting, the
controller will stop discharging to protect the battery from over discharging
If the load current exceeds the maximum load current rating 1.25 times, the
controller will automatically cut off the output. If the load reconnects the output
automatically 10 times, it needs to be cleared by pressing the test key,
restarting the controller or switching from Night to the Day.
When the load output of the controller is short circuited, the controller will
automatically cut off the output. If the load reconnects the output automatically
10 times, it needs to be cleared by pressing the test key, restarting the
controller or switching from Night to the Day.
The controller detects the internal temperature through internal sensor, when
the temperature exceeds the setting value, the charging current will decrease.
The controller stops working when the internal temperature exceeds 75℃ and
resumes work when the internal temperature is below 65℃.
When the external temperature sensor is damaged or not connected, the
controller will charge at 25 ℃ by default to prevent overcharge from damaging
the battery.
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
21
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