STI SC Series - Troubleshooting; Troubleshooting Guide

STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 5020, rev.03 07/2021 - SC/VHS 23
9 TROUBLESHOOTING
Event
Possible cause
Remedy
Actuator doesn’t
work properly
Lack of hydraulic supply
Check supply line
Defective main valve
Consult valve manufacturer documentation
Failure of the control
group
Call STI s.r.l. - Customer Care Dept.
Actuator too slow
Low supply pressure
Adjust supply pressure
Incorrect speed control
settings
Adjust speed controls to increase flow
Wear of the main valve
Consult valve manufacturer documentation
Actuator too fast
High supply pressure
Reset
Incorrect speed control
settings
Adjust speed controls to decrease flow
Leakages on
hydraulic circuits
Deterioration and/or
damage to gaskets and or
loosed fittings
Tightness loosed fittings
Call STI s.r.l. - Customer Care Dept..
Damage to fittings
Call STI s.r.l. - Customer Care Dept.
Leakages on
hydraulic cylinder
Damage to seals
Replace cylinder seals
Incorrect position of
the valve
Wrong adjustment of
mechanical stops
Re-adjust setting
Wrong electric limit
switches indication.
Re-adjust setting