User Manual

17
4 Protections, Troubleshooting and Maintenance
4.1 Protection
 PV Over Current
The controller will limit battery charging current to the Maximum Battery Current
rating. Therefore an over-sized solar array will not operate at peak power.
 PV Short Circuit
When PV short circuit occurs, the controller will stop charging. Clear it to resume
normal operation.
 PV Reverse Polarity
Fully protection against PV reverse polarity, no damage to the controller will
result. Correct the miswire to resume normal operation.
WARNING: Controller will be damaged when the PV array reverse
polarity and the actual operation power of the PV array is 1.5 times
greater than the rated charge power!
 Battery Reverse Polarity
Fully protection against battery reverse polarity, no damage to the controller will
result. Correct the miswire to resume normal operation.
 Battery Over voltage
When battery voltage reach to the voltage set point of Over Voltage Disconnect
Voltage, the controller will stop charging the battery to protect the battery
overcharge to break down.
 Battery Over discharge
When battery voltage reach to the voltage set point of Low Voltage Disconnect
Voltage, the controller will stop discharging the battery to protect the battery over
discharged to break down.
 Battery Overheating
The controller detect the battery temperature through the external temperature
sensor. If the battery temperature exceeds 65ºC, the controller will automatically
start the overheating protection to stop working and recover below 50 ºC.
 Load Overload
If the load current exceeds the maximum load current rating 1.05 times, the
controller will disconnect the load. Overloading must be cleared up through
reducing the load and restarting controller.
 Load Short Circuit
Fully protected against load wiring short-circuit. Once the load shorts (more than
quadruple rate current), the load short protection will start automatically. After five
automatic load reconnect attempts, the fault must be cleared by restarting
controller.