Troubleshooting - GEM 9428 Operating Instructions Manual

13 Troubleshooting

13 Troubleshooting
Error
Despite supply voltage according to
product label, actuator defective
No function
No function during parallel operation
Actuator does not open or does not open
correctly
Actuator doesn't close or doesn't close
fully
Actuator doesn't close or doesn't close
correctly
Actuator blocked
Actuator leaking, water or moisture inside Leakage at the union
Actuator leaking
Actuator continues running in the end po-
sition without switching off
Actuator does not actuate valve
Actuator has play and moves on valve
Motor burnt out
Manual emergency operation not pos-
sible
No signal feedback
No end position feedback
No position feedback
No optical position indicator visible
GEMÜ 9428
Error cause
Wrong product label attached to the actu-
ator
Power supply not OK
Actuator defective
Cable break in the housing
Actuator not suitable for parallel opera-
tion
Actuator defective
Power supply faulty
Working medium pressure of the valve
too high
Power supply faulty
Transmission damage
Impediment blocks the valve
Rubber seal not assembled correctly
Actuator was adjusted beyond end posi-
tions by manual override
Limit switch for motor incorrectly adjus-
ted
Adapter from star to actuator shaft is too
small
Shaft of the valve too short
Connecting bolts incorrectly tightened
Supply voltage too high, wrong frequency
or wrong polarity
Actuator continues running in the end po-
sition as it did not switch off
Actuator still live
Actuator blocked
Signal line wrongly connected
End position feedback switch incorrectly
set
Actuator is without additional position
feedback
Position feedback defective or no
4-20 mA signal version
Optical position indicator has moved out
of viewing window
58 / 64
Troubleshooting
Contact GEMÜ Service
Сheck power supply and connection and
correct if necessary
Replace actuator
Contact GEMÜ Service
Contact GEMÜ Service and order K-no.
6410
Replace actuator
Сheck power supply and connection and
correct if necessary
Operate butterfly valve / ball valve with
operating pressure specified in datasheet
Сheck power supply and connection and
correct if necessary
Contact GEMÜ Service
Remove impediment from valve
Check the union, contact GEMÜ Service if
necessary
Correctly assemble rubber seal, contact
GEMÜ Service if necessary
Adjust the end positions, contact GEMÜ
Service if necessary
Adjust the end positions, contact GEMÜ
Service if necessary
Contact GEMÜ Service
Install suitable adapter, contact GEMÜ
Service if necessary
Check / retighten connecting bolts
Contact GEMÜ Service
Contact GEMÜ Service
Switch off the power supply
Remove impediment from valve
Contact GEMÜ Service
Contact GEMÜ Service
Contact GEMÜ Service
Contact GEMÜ Service
Reset the actuator
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