Fronius String Control 100/12, Operating Instructions Manual, Page: 82 / 182

80
Restoring the en-
ergy supply man-
ually The manual restoration option for the energy supply helps the installer during Fronius Solar
Net troubleshooting.
Jumper positions:
A Automatic restoration of the energy
supply
(factory setting)
B Manual restoration of the energy
supply
The jumper (1) must be set to position M for manual restoration of the energy supply.
- After a shutdown due to overcurrent or under-voltage, there are 2 options available to
restore the energy supply manually:
- When the power supply is reestablished the ‘PWROK’ LED lights up green.
If there is no short circuit and the LED ‘PWROK’ is not lit up, a shutdown due to under-
voltage has occurred.
In this case an energy supply to the DATCOM components via an external source is re-
quired.
(1) (2)
a) Unplug the data communication cable from the IN and OUT RJ45 connections
and plug in again
or
disconnect the multi-core data communication cable from the IN and OUT ter-
minals and then reconnect;
If present, unplug cable for external power supply
b) Cover the ‘PWROK’ LED for 0.5 - max. 2 seconds (e.g., with your finger)
In order for the ‘PWROK’ LED to detect the darkness, certain ambient lighting
conditions are required. If the lighting conditions on site are insufficient, the LED
will not react. In this case, shine a flashlight into the LED and then cover it to
darken it, for example.