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GEMÜ 639 eSyStep
OPEN / CLOSE (Code AE)
15 Troubleshooting
15.2 Troubleshooting
Error
Possible cause
Troubleshooting
The product leaks downstream (doesn't
close or doesn't close fully)
No initialization carried out after dia-
phragm replacement
Initialize the product
Operating pressure too high
Operate the product with operating pres-
sure specified in datasheet
Foreign matter between shut off dia-
phragm and valve body weir
Remove the actuator, remove foreign
matter, check diaphragm and valve body
weir for potential damage, replace actu-
ator if necessary
Valve body leaks or is damaged
Check valve body for potential damage,
replace valve body if necessary
Shut off diaphragm faulty
Check shut off diaphragm for potential
damage, replace diaphragm if necessary
The product doesn't open or doesn't open
fully
No initialization carried out after dia-
phragm replacement
Initialize the product
Actuator defective
Replace the actuator
Shut off diaphragm incorrectly mounted Remove actuator, check diaphragm
mounting, replace if necessary
Operating pressure too high
Operate the product with operating pres-
sure specified in datasheet
Foreign matter in the product
Remove and clean the product
The actuator design is not suitable for the
operating conditions
Use an actuator that is designed for the
operating conditions
Voltage is not connected
Connect voltage
Cable ends incorrectly wired
Wire cable ends correctly
The product doesn't close or doesn't
close fully
The actuator design is not suitable for the
operating conditions
Use an actuator that is designed for the
operating conditions
Foreign matter in the product
Remove and clean the product
Voltage is not connected
Connect voltage
The product leaks between actuator and
valve body
Shut off diaphragm incorrectly mounted Remove actuator, check diaphragm
mounting, replace if necessary
Bolting between valve body and actuator
loose
Retighten bolting between valve body and
actuator
Shut off diaphragm faulty
Check shut off diaphragm for damage, re-
place diaphragm if necessary
Actuator/valve body damaged
Replace actuator/valve body
The product leaks between actuator
flange and valve body
Mounting parts loose
Retighten mounting parts
Valve body / actuator damaged
Replace valve body/actuator
Body of the GEMÜ product is leaking
Body of the GEMÜ product is faulty or
corroded
Check the body of the GEMÜ product for
potential damage, replace body if neces-
sary
Incorrect installation
Check installation of valve body in piping
Valve body connection to piping leaks
Incorrect installation
Check installation of valve body in piping
