Table of Contents
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12 Troubleshooting
Error
Working medium escapes from leak de-
tection hole
The product doesn't open or doesn't open
fully
The product leaks downstream (doesn't
close or doesn't close fully)
The product leaks between actuator and
valve body
Connection between valve body and pip-
ing leaking
Valve body leaks
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Error cause
Plug diaphragm faulty
Actuator faulty
Plug diaphragm incorrectly mounted
Operating pressure too high
Plug diaphragm incorrectly mounted
Foreign matter between plug diaphragm
and valve seat
Valve body leaks or is damaged
Plug diaphragm faulty
Plug diaphragm incorrectly mounted
Bolting between valve body and actuator
loose
Plug diaphragm faulty
Actuator/valve body damaged
Incorrect installation
Sealing material faulty
Valve body leaks or is corroded
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12 Troubleshooting
Troubleshooting
Check plug diaphragm for potential dam-
age, replace plug diaphragm if necessary
Replace actuator cartridge, replace actu-
ator if necessary
Remove actuator, check plug diaphragm
mounting, replace plug diaphragm if ne-
cessary
Operate the product with operating pres-
sure specified in datasheet
Remove actuator, check plug diaphragm
mounting, correct if necessary
Remove actuator, remove foreign matter,
check plug diaphragm and valve body for
damage and replace if necessary
Check valve body for potential damage,
replace valve body if necessary
Check plug diaphragm for potential dam-
age, replace plug diaphragm if necessary
Remove actuator, check plug diaphragm
mounting, correct if necessary
Tghten bolting between valve body and
actuator
Check plug diaphragm for potential dam-
age, replace plug diaphragm if necessary
Replace actuator/valve body
Check installation of valve body in piping
Replace sealing material
Check valve body for damage, replace
valve body if necessary
GEMÜ 567 BioStar control
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