English to French Other Engineering: Industrial

The isolating hand valves upstream of the power oil pumps:
A 
Are having a position feedback
B 
Are not having a position feedback
C 
Are for maintenance purpose
D 
Are opened automatically when the function group power oil is started
E 
Must be securely locked in open position during operation

Are not having a position feedback= N'ont pas reçu de signal en réponse à leur positionnement
merci pour suggestions