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GEMÜ GDR/GSR
16 Troubleshooting
Error
Possible cause
Troubleshooting
Actuator doesn't open/close or doesn't
open/close fully
Operating pressure too high
Operate butterfly valve/ball valve with op-
erating pressure specified in datasheet
Control pressure too low
Operate actuator with control pressure
specified in datasheet
Control medium not connected
Connecting the control medium
The actuator design is not suitable for the
operating conditions
Use an actuator that is designed for the
operating conditions
End positions incorrectly set
Correctly set the end positions (see "Set-
ting the end positions")
Actuator defective
Replace the actuator
Actuator spare parts faulty
Replace the actuator spare parts
Contaminated control medium
Disassemble and clean the actuator, in-
stall a filter upstream
Foreign matter in the shut-off valve
Disassemble and clean the shut-off valve
Actuator leaking at the mounting flange
Actuator damaged
Check the actuator for potential damage,
replace the actuator if necessary
Valve body damaged
Check valve body for potential damage,
replace valve body if necessary
Unions loose
Tighten unions
Incorrect assembly
Check actuator mounting on the valve
body
16 Troubleshooting