Event 1302
Qualified person
Event message:
Waiting for grid voltage
Grid connection installation failure
Check grid and fuses
Explanation:
The grid monitor of the inverter has detected that one or more line conductors or the neutral conductor are not connected. This may be due to the absence of neutral point grounding for the grid transformer or the absence of grounding for the main grounding busbar. The inverter cannot connect to the AC grid. The event message may also occur if the inverter cannot identify the connected AC grid. In these cases, an incorrectly configured country data set may be the cause.
Corrective measures:
Ensure that the miniature circuit breaker is switched on.
Ensure that the correct country data set has been configured in the inverter.
Ensure that the AC connection at the inverter and at the point of interconnection is correctly executed. Repair or replace defective terminal points and fuses.
Ensure that the AC voltage at the AC connection of the inverter and in the subdistributor is in the permissible range. There should only be a few volts of difference between the values. For three-phase inverters, perform the measurements for all connection line conductors.
If the inverter is connected to a TN-C system, ensure that the voltage between N and PE is less than 0.3 V.
If the inverter is connected to a TT system, ensure that the voltage between N and PE is less than 10 V.
Ensure that the voltage between the line conductor and protective conductor is the same as the mains voltage and in the permissible range. For three-phase inverters, perform the measurements for all connection line conductors.
Ensure that the voltage between the line conductor and neutral conductor is the same as the mains voltage and in the permissible range. For three-phase inverters, perform the measurements for all connection line conductors.
Ensure that all grounding measures are correctly executed. If necessary, check that the neutral point grounding of the system transformer is correct.