Corrective Action; Faults During Commissioning; Fault Indications And Warning Indications - AUMA SA 07.2 Operation Instructions Manual

SA 07.2 SA 16.2/SAR 07.2
AC 01.2 Intrusive
10.

Corrective action

10.1

Faults during commissioning

Table 10: Faults during commissioning
Fault description
Mechanical position indicator
cannot be set.
Fault in end position
Actuator runs to end stop alt-
hough the limit switches work
properly.
Position transmitter RWG
Measurement range 4 20 mA
or maximum value 20 mA cannot
be set.
Limit and/or torque switches do
not trip.
Switch check
10.2

Fault indications and warning indications

SAR 16.2 Control unit: electromechanic
Possible causes
Reduction gearing is not suitable for
turns/stroke of the actuator.
The overrun was not considered when setting
the limit switching.
The overrun is generated by the inertia of
both the actuator and the valve and the delay
time of the controls.
Reduction gearing is not suitable for
turns/stroke of the actuator.
Switch is defective or switch setting is incor-
rect.
The red test buttons [1] and [2] are used for manual operation of the switches:
1. Turn test button [1] in direction of the TSC arrow: Torque switch CLOSED trips.
2. Turn test button [2] in direction of the TSO arrow: Torque switch OPEN trips.
If the actuator is equipped with a DUO limit switching (option), the intermediate
position switches (LSA and LSB) will be operated at the same time as the torque
switches.
1. Turn test button [1] in direction of the LSC arrow: Limit switch CLOSED trips.
2. Turn test button [2] in direction of the LSO arrow: Limit switch OPEN trips.
Faults interrupt or prevent the electrical actuator operation. In the event of a fault,
the display backlight is red.
Warnings have no influence on the electrical actuator operation. They only serve
for information purposes.
Collective signals include further indications which can be displayed via the
Details push button.
Corrective action
Remedy
Exchange reduction gearing.
Determine overrun: Overrun = travel covered
from switching off until complete standstill.
Set limit switching again considering the
overrun (turn handwheel back by the amount
of the overrun).
Exchange reduction gearing.
Check setting, if required, reset end positions.
→ Check switches and replace them, if requi-
red.
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