GEM 629 eSyLite Operating Instructions Manual page 37

13 Troubleshooting
Error
The product is leaking downstream (does
not close or does not close fully)
The product does not open or does not
open fully
The product does not close or does not
close fully
The product is leaking between actuator
and valve body
The product is leaking between actuator
flange and valve body
Valve body of the GEMÜ product is leak-
ing
Body of the GEMÜ product is leaking
Valve body connection to piping leaking
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Possible cause
Operating pressure too high
Foreign matter between shut-off dia-
phragm and valve body
Valve body leaking or damaged
Shut off diaphragm faulty
Actuator defective
Shut-off diaphragm incorrectly mounted
Operating pressure too high
Foreign matter in the product
The actuator design is not suitable for the
operating conditions
Voltage is not connected
Cable ends incorrectly wired
The actuator design is not suitable for the
operating conditions
Foreign matter in the product
Voltage is not connected
Shut-off diaphragm incorrectly mounted
Bolting between valve body and actuator
loose
Shut off diaphragm faulty
Actuator/valve body damaged
Mounting parts loose
Valve body / actuator damaged
Valve body of the GEMÜ product is faulty
or corroded
Incorrect installation
Incorrect installation
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13 Troubleshooting
Troubleshooting
Operate the product with operating pres-
sure specified in datasheet
Remove the actuator, remove foreign
matter, check diaphragm and valve body
for potential damage, replace damaged
parts if necessary
Check valve body for potential damage,
replace valve body if necessary
Check shut off diaphragm for potential
damage, replace the shut off diaphragm
if necessary
Replace the actuator
Remove the actuator, check the dia-
phragm mounting, replace the shut-off
diaphragm if necessary
Operate the product with operating pres-
sure specified in datasheet
Remove and clean the product
Use an actuator that is designed for the
operating conditions
Connect voltage
Wire cable ends correctly
Use an actuator that is designed for the
operating conditions
Remove and clean the product
Connect voltage
Remove the actuator, check the dia-
phragm mounting, replace the shut-off
diaphragm if necessary
Tighten bolting between valve body and
actuator
Check shut off diaphragm for potential
damage, replace the shut off diaphragm
if necessary
Replace actuator/valve body
Retighten mounting parts
Replace valve body/actuator
Check valve body of the GEMÜ product
for potential damage, replace valve body
if necessary
Check installation of valve body in piping
Check installation of valve body in piping
GEMÜ 629 eSyLite