Hardware operation
3.2 Operating the inverter
3.2.5Fault reset
You can reset a fault by turning the keyswitch from "AUTO" to "TEST" and back to "AUTO" or vice versa. If the inverter has been disabled due to a fault, it can now be activated again.
3.2.6Displaying currently active alarms and faults
In Automatic mode, you can display the last ten alarm and fault codes. To do this, press the OFF key in Automatic mode for more than 3 seconds. The alarm and fault codes will then appear in sequence on the
3.2.7Adjusting the voltage
In Test mode, you can adjust the voltage at the DC connections for test and commissioning purposes. To do this, press the OFF key in Test mode for more than 3 seconds. The voltage is then adjusted in increments of 10°V across the entire voltage window. The
3.2.8Grid LED indicator bar
The grid LED indicator bar shows the power output of the inverter system in increments of 25%. The display refers to the output of the relevant individual inverter. In Automatic mode, the total system output of the master/slave unit is shown on the
3.2.9Status display
The status display indicates the status of the whole system.
Insulation fault/alarm (LED "ISO FAULT")
If the insulation resistance between the PV field and ground is too low, there is a risk of electric shock if you touch the PV modules. The inverter is equipped with an insulation monitoring device which detects this hazard and outputs an alarm.
If the insulation resistance is in the range that is dangerous for people, an insulation warning is triggered and the "ISO FAULT" LED flashes.
If the insulation value is in the range that is dangerous for the system, the "ISO FAULT" LED lights continuously and the inverter releases the relevant inputs. Even when switched off, a system with an insufficient insulation value represents a danger.
The cause of the low insulation value must be immediately rectified.
DANGER
The cause of the low insulation value must be immediately rectified.
Even when switched off, a system with an insufficient insulation value represents a danger.
CAUTION
Insulation faults reduce system yield!
The cause of the low insulation value must be immediately rectified.
Ready to run (LED "ONLINE")
The "ONLINE" LED lights up steadily while the inverter is in operation. The DC contactors and the main AC contactor are closed and the power unit is generating voltage.
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