Siemens F31103 fault code meaning

Series: G120-CU250S-2, G120D

Encoder 1: Signal R amplitude error

converter

Meaning: The amplitude of the zero pulse signal (signal R) of encoder 1 is outside the tolerance range. This fault may be caused by exceeding the "unipolar" voltage level (RP/RN) or by insufficient differential amplitude.

Possible causes

Source: SINAMICS G120, Control Unit CU250S-2 P1093; SINAMICS G120D Control Unit CU240D- 2_CU250D- 2 P941