Event
Description
Possible cause
Troubleshooting
Potifail Open
0x8CA4
The event occurs if a valve po-
sition is read which can never
be achieved in the "Open" dir-
ection.
Fault in valve position detec-
tion.
Check valve/diaphragm
Error when replacing a dia-
phragm (stroke of the valve in
incorrect area).
Actuator has been fitted on the
valve incorrectly (stroke of the
valve in the incorrect area).
Init Fail
0x8CA6
0x8CA7
0x8CA8
The events occur if the dis-
tance between the OPEN and
CLOSED positions determined
during initialization is implaus-
ible.
Valve is blocked (for example,
solid stuck in valve).
Check valve
Carry out initialization if valve
is OK
Valve is corroded (rusted in
place).
Valve not yet initialized.
Initialization carried out with
incorrectly mounted valve
(spindle, diaphragm or valve
body incorrectly mounted, for
example).
Not Calibrated
0x8CA9
The event occurs if the actu-
ator does not have a valid cal-
ibration. The actuator is calib-
rated in the factory.
Contact GEMÜ Support
Over Current Output 1
0x8CC0
The event occurs when a short
circuit is present at pin 5 (di-
gital input/digital output).
Supply line insulation is dam-
aged.
Check supply line
Check pin configuration
Check the wiring of the pin
Incorrect pin configuration.
Incorrect wiring of the pin.
Over Current Output 2
0x8CC1
The event occurs when a short
circuit is present at pin 6 (di-
gital output (IO-Link)).
Supply line insulation is dam-
aged.
Check supply line
Check the wiring of the pin
Incorrect wiring of the pin.
Non Volatile Memory Loss
0x5011
The event occurs when it has
been determined when starting
the actuator that the specific
data in the actuator's read-only
memory has been changed un-
intentionally.
Save values in the read-only
memory in case of power fail-
ure (eSyStep OPEN/CLOSE
does not have any power buf-
fering).
It is uncritical data in the case
of this event, the actuator still
functions
Parameter Changed
0x6350
The event occurs when it is
has been determined when
starting the actuator that the
configuration data in the actu-
ator's read-only memory has
been changed unintentionally.
The configuration data that
has been changed has been re-
set to its default values. The
event serves to signal the
changes in the configuration
data.
Save values in the read-only
memory in case of power fail-
ure (eSyStep OPEN/CLOSE
does not have any power buf-
fering).
Check the configuration of the
actuator
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GEMÜ 639 eSyStep
OPEN / CLOSE (Code AE)
12 Specific data IO-Link (pin 6)
