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 Modbus RTU
12.

Corrective action

12.1.

Faults during commissioning

Table 32:
Faults during operation/commissioning
Fault
Mechanical position indicator cannot
be set.
In spite of correct setting of mechan-
ical limit switching, actuator operates
into the valve or actuator end position.
Measuring range 0/4 20 mA or
maximum value 20 mA at position
transmitter cannot be set or supplies
an incorrect value.
The measuring range 0/4 20 mA at
EWG position transmitter cannot be
set.
Limit and/or torque switches do not
trip.
Handwheel rotates on the shaft
without transmitting torque.
Switch check
12.2.

Fault indications and warning indications

SAR 16.2 Control unit - electromechanical
Description/cause
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
actuator controls.
Reduction gearing is not suitable for turns/stroke
of the actuator.
The LED on the EWG either flashes in setting mode
a) single flash or b) triple flash:
a) EWG is not calibrated.
b) Magnet positions of EWG are not aligned.
Switch is defective or switch setting is incorrect.
Actuator in version with overload protection for
manual operation: Shear pin rupture due to excess-
ive torque at handwheel.
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. The display remains white.
Collective signals include further indications. They can be displayed via the
Details push button. The display remains white.
Corrective action
Remedy
Set gear stage of the reduction gearing.
Determine overrun: Overrun = travel covered
from switching off until complete standstill.
Set limit switching again considering the over-
run. (Turn handwheel back by the amount of
the overrun)
Set gear stage of the reduction gearing.
Call service.
Check setting, if required, reset end positions.
Refer to <Check switches> and replace the
switches if required.
Dismount handwheel. Replace overload protection
and remount handwheel.
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