Fronius · Symo Advanced
This status indicates that a device connected in the Wired Shutdown (WSD) chain has interrupted the signal line, possibly due to a tripped surge protection device (SPD), the removal of an installed bypass, or a missing trigger device. This condition results in the inverter's operating LED flashing red. It prevents normal operation until the WSD chain integrity is restored.
Click steps to track your progress.
If an SPD surge protection device has tripped, arrange for the inverter to be repaired by an authorized specialist.
Install the bypass installed ex works as standard or a suitable trigger device into the WSD chain.
Turn the WSD (wired shutdown) switch to position 1 (WSD primary device) to enable the primary device functionality.