5.3. Protections and automatic restarts
Overload
Some loads like motors or pumps draw large inrush currents in a start-up situation. In such circumstances, it is possible that
the start-up current exceeds the over current trip level of the inverter. In this case the AC output voltage will quickly decrease to
limit the output current of the inverter. If the over current trip level is continuously exceeded, the inverter will shut down, wait 30
seconds and then restart.
After 3 restarts, followed by another overload within 30 seconds of restarting, the inverter will shutdown and remain off. The LEDs
will signal shutdown due to overload. To restart the inverter, switch it off and than back on again.
Low battery voltage (adjustable)
The inverter will shut down when the DC input voltage drops below the "Low battery shutdown" parameter. The LEDs will signal
shutdown due to low battery. The inverter will automatically restart, after a minimum delay of 30 seconds, when the battery
voltage has increased above the "Low battery restart" parameter.
After three restarts, followed by another low battery shutdown within 30 seconds of restarting, the inverter will shutdown and
remain off. The LEDs will signal shutdown due to low battery. To restart the inverter, switch it off, and then on again. Alternatively,
recharge the battery. The inverter will automatically restart when the battery voltage has increased for at least 30 seconds above
the "Charge detect" parameter.
See the
chapter for default low battery shutdown and restart levels. The levels can be customized
via the VictronConnect app.
Alternatively, a dynamic low battery cut off can be implemented. For more information, see the
High battery voltage
The inverter will shut down when the DC input voltage is too high. The LEDs will signal shutdown due to high battery. The inverter
will first wait 30 seconds and will only resume operation once the battery voltage has dropped to an acceptable level.
Check for faulty battery chargers, alternators or solar chargers connected to the battery.
High temperature
The inverter will shut down if it detects a too high internal temperature. The LEDs will signal shutdown due to high temperature.
The inverter will wait 30 seconds and will only resume operation when the temperature has dropped to an acceptable level.
High temperature alarms are generally caused by a too high ambient temperature, often in combination with a high inverter load.
Check if the area the inverter is used in, is well ventilated and perhaps even air-conditioned.
High DC ripple
The inverter will shut down if it detects a too high DC ripple. The LEDs will signal shutdown due to high DC ripple. The inverter
will wait 30 seconds and then resumes operation again. If after 3 restarts, the DC ripple voltage is still too high, the inverter will
shutdown and will not attempt to restart again. To restart the inverter, switch it off and then switch it on again.
High DC ripple is usually caused by loose DC cable connections and/or too thin DC wiring. To clear or prevent ripple alarms,
check the wiring between the battery and the inverter. Check if the wiring is the recommended thickness, that all connections are
tightened correctly and that the fuses and battery isolators are in good working order. For more information on DC ripple see the
Continuous high DC ripple reduces the life expectancy of the inverter.
5.4. Monitoring via VictronConnect
The VictronConnect app can be used to monitor the inverter.
Phoenix Inverter Smart Manual
Page 14
Operation
