Event
Mode
Type
Code
Potifail Close
App/Disapp
Warning
0x8CA5
Potifail Open
App/Disapp
Warning
0x8CA4
Init Fail With No Stroke
App/Disapp
Warning
0x8CA6
Init Fail With Less Stroke
App/Disapp
Warning
0x8CA7
Init Fail After Potifail
App/Disapp
Warning
0x8CA8
Not Calibrated
App/Disapp
Warning
0x8CA9
Over Current Output 1
App/Disapp
Warning
0x8CC0
Over Current Output 2
App/Disapp
Warning
0x8CC1
Non Volatile Memory Loss
Single Shot
Warning
0x5011
Parameter Changed
Single Shot
Information
0x6350
Description – Events
Event
Description
Possible cause
Troubleshooting
Device Hardware Fault
0x5000
The event occurs when a hard-
ware fault is detected.
Fault in valve position detec-
tion.
Contact GEMÜ Support
Parameter can no longer be
read when switching the
device on.
Motor Unable To Move
0x8CE0
The event occurs when the
motor is blocked.
Valve is blocked (for example,
solid stuck in valve).
Check valve
Carry out initialization if valve
is OK
Valve corroded (rusted in
place).
End position can no longer be
reached (after replacing the
diaphragm).
Device Temperature Over-Run
0x4210
The event occurs as a warning
or error if the motor temperat-
ure is too high.
Control is operated outside of
the specification.
Check temperature
Set control correctly (check
duty cycle (ED) of the actuator)
The ambient temperature is
too high.
Emergency Power
0x5100
The event occurs if the supply
is too low. The event is
triggered as a warning if the
supply voltage Uv is below a
value of 21.1 V. (If the supply
voltage is below 17.4 V, the
event Primary Supply Voltage
Under-Run (0x5111) is
triggered as an error).
Power supply unit overloaded. Check supply
Cross-section of the supply
line is too small.
Supply line is too long.
Primary Supply Voltage Under-
Run
0x5111
The event occurs if the supply
voltage is too low.
Power supply unit overloaded. Check supply
Cross-section of the supply
line is too small.
Supply line is too long.
Potifail Close
0x8CA5
The event occurs if a valve po-
sition is read which can never
be achieved in the "Close" 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).
GEMÜ 639 eSyStep
OPEN / CLOSE (Code AE)
www.gemu-group.com
55 / 67
12 Specific data IO-Link (pin 6)
