11 Error clearance
Error Error cause Error clearance
Control medium escapes from vent hole /
vent in the actuator cover
Piston faulty NC and NO Replace actuator cartridge
Spindle seal leaking NC Replace actuator cartridge
Working medium escapes from leak
detection hole
Plug diaphragm faulty Check plug diaphragm for potential
damage, replace plug diaphragm if
necessary
The product doesn't open or doesn't
open fully
Control pressure too low Operate the product with the control
pressure specified in the datasheet
Pilot valve faulty Replace the pilot valve
Actuator faulty Replace actuator cartridge, replace
actuator if necessary
Control medium not connected Connect the control medium
Plug diaphragm incorrectly mounted Remove actuator, check plug diaphragm
mounting, replace plug diaphragm if
necessary
Actuator spring faulty (for control
function NO)
Replace actuator cartridge
The product leaks downstream (doesn't
close or doesn't close fully)
Operating pressure too high Operate the product with operating
pressure specified in datasheet
Plug diaphragm incorrectly mounted Remove actuator, check plug diaphragm
mounting, correct if necessary
Control pressure too low (for control
function NO)
Operate valve with control pressure
specified in data sheet
Foreign matter between plug diaphragm
and valve seat
Remove actuator, remove foreign matter,
check plug diaphragm and valve body for
damage and replace if necessary
Valve body leaks or is damaged Check valve body for potential damage,
replace valve body if necessary
Plug diaphragm faulty Check plug diaphragm for potential
damage, replace plug diaphragm if
necessary
Actuator spring faulty (for control
function NC)
Replace actuator cartridge
The product leaks between actuator and
valve body
Plug diaphragm incorrectly mounted Remove actuator, check plug diaphragm
mounting, correct if necessary
Bolting between valve body and actuator
loose
Retighten bolting between valve body
and actuator
Plug diaphragm faulty Check plug diaphragm for potential
damage, replace plug diaphragm if
necessary
Actuator/valve body damaged Replace actuator/valve body
Valve body connection to piping leaks Incorrect installation Check installation of valve body in piping
Sealing material faulty Replace sealing material
Valve body leaks Valve body leaks or is corroded Check valve body for damage, replace
valve body if necessary
11 Error clearance
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GEMÜ F40