2
Fault list – safety technology
Fault 20 Device monitoring
Manual – Fault Descriptions MOVISAFE
®
CS..A
35
Subfault: 20.17
Description: Undervoltage encoder reference voltage
Fault class: System error
Cause
Measure
Undervoltage of encoder reference voltage de-
tected.
– Switch the device off and on again.
– If the fault occurs repeatedly, replace the safety
card and send it together with the fault number to
SEW‑EURODRIVE. For further support, contact
SEW‑EURODRIVE Service.
Subfault: 20.18
Description: Overvoltage encoder reference voltage
Fault class: System error
Cause
Measure
Overvoltage of encoder reference voltage detect-
ed.
– Switch the device off and on again.
– If the fault occurs repeatedly, replace the safety
card and send it together with the fault number to
SEW‑EURODRIVE. For further support, contact
SEW‑EURODRIVE Service.
Subfault: 20.19
Description: Safety card undervoltage of reference voltage
Fault class: System error
Cause
Measure
Undervoltage of reference voltage detected.
– Switch the device off and on again.
– If the fault occurs repeatedly, replace the safety
card and send it together with the fault number to
SEW‑EURODRIVE. For further support, contact
SEW‑EURODRIVE Service.
Subfault: 20.20
Description: Safety card overvoltage of reference voltage
Fault class: System error
Cause
Measure
Overvoltage of reference voltage detected.
– Switch the device off and on again.
– If the fault occurs repeatedly, replace the safety
card and send it together with the fault number to
SEW‑EURODRIVE. For further support, contact
SEW‑EURODRIVE Service.
27799182/EN – 10/2022