J+J J4C S20, Handbook

Page: 90 / 91

10 FAQS
HANDBOOK_
FAQ_
90
The actuator moves and then stops. The operating LED flashes red or green (see status LED).
»» High torque on the valve due to not removed end stops or solids in the valve. Valve must be checked!
»» Model size of the actuator is too small.
The actuator is in position „open“ but the valve is closed or half opened.
»» Actuator is mounted on the valve with a wrong angle. Dismount, turn the actuator in manual mode to
correct angle, mount it.
The limit switches for end position feedback do not work.
»» Check the wiring. Check the adjustment of the cams so that they trigger shortly before reaching the end
position.
»» In load-free interrogation of the limit switch, soot is formed inside. Actuator with gold contact switches
are to be used.
The actuator moves, but the valve does not.
»» The connection between actuator and valve is damaged or incorrectly dimensioned.
For other malfunctions, please contact our technical service department.
INDEX