!!
critical Silvercrest
Error Code S B
Spa is shut down due to a failed or malfunctioned plug socket 'B' sensor.
? What Causes This
Faulty sensor in plug socket ‘B’
✓ How to Fix It
Check the correct operation of that sensor and seek service assistance if unresolved.
Source: page 8 of the official manual
From the manual
This error code appears in:
Silvercrest Sfb 80 A1 Foot Spa