CCD-0007727 Rev: 06-01-23
- 21 -
Protections, Troubleshooting, and Maintenance
English
Protection Features
Protection
Description
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 eciency.
PV Short Circuit
When PV short circuit occurs, the controller will not start charging. Correct it to
resume normal operation.
Warning: Do not short circuit the PV array terminals when the controller
is in active charging mode. This could result in permanent damage to the
controller.
PV Reverse Polarity
Fully protected against PV reverse polarity, no damage to the controller.
Correct the connection to resume normal operation.
Battery Reverse Polarity Fully protected against battery reverse polarity, no damage to the controller.
Correct the connection to resume normal operation
Battery Over voltage
Should there be other energy sources to charge the battery, when the battery
voltage exceeds 15.8 / 31.3 (Overcharge protection voltage of
lithium battery equals target voltage plus 0.2V), the controller will stop
charging to protect the battery from overcharging damage.
Battery Over discharge
When battery voltage drops to the low voltage disconnect setting, the
controller will stop discharging to protect the battery from over discharging
damage.
Load Over Current
Protection
If the load current exceeds the maximum load current rating 1.25 times, the
controller will disconnect the load.
Load Short Circuit
Protection
Once the load short circuit happens, the load short circuit protection will
trigger automatically
Over Temperature
Protection
The controller detects the internal temperature through internal sensor,
when the temperature exceeds the setting value, the charging current will
decrease, and consequently, the controller’s 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.
Damaged Remote
Temperature Sensor
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.