Activating String-Failure Detection

Identical alignment of the PV modules with activated string-failure detection

If you would like to activate the string-failure detection, the PV modules of input A and input B must be aligned identically and the input voltage must be at least 188 V. Thus, reversed polarity of the DC connection or a defective string will be recognized by the inverter.

1. Ensure that all PV modules are aligned identically.
2. Ensure that the input voltage is at least 188 V.

If identically aligned PV modules are connected to input A and input B of the inverter, you can activate the self-learning string-failure detection and/or the substring-failure detection.

The basic procedure for changing operating parameters is explained in another section ( > Changing Operating Parameters).

Procedure:

• To activate string-failure detection, select the parameter Operating mode of string failure detection or Op.PvProMod and set to Detect string failures or StrgFltDet.

• To activate string-failure detection and substring-failure detection, select the parameter Operating mode of string failure detection or Op.PvProMod and set to Detect partial string failures or PaStrgFltDet.