RsdSelftest Failed
RSD Self-test Failed
Fronius · Symo Advanced
What does RsdSelftest Failed mean?
The automatic self-test for the Rapid Shutdown (RSD) function has failed. This self-test specifically monitors the discharge circuit of the RSD function and is performed during each startup procedure, prior to connection to the public grid, when DC voltage exceeds 40V.
Common Causes
- Malfunction or fault within the RSD discharge circuit.
- Insufficient DC voltage (below 40V) to properly initiate the self-test.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Perform a manual self-test by initiating an interruption in the grid connection (e.g., trip the AC breaker) or by activating the WSD trigger device.
- 2
Measure and verify the discharge of the PV module terminals using a multimeter to confirm proper operation of the RSD discharge circuit.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Symo Advanced