Operating Instructions

Corrective action
Fault indications and warning indications
62 | 80
A6V12052002
Indication on display
Description/cause
Remedy
Wrn input AIN 2
Warning: Loss of signal
analogue input 2
Check wiring.
Wrn setpoint position
Warning: Loss of signal setpoint
position
Possible causes:
Check setpoint signal.
For an adjusted setpoint range of e.g. 4 to 20
mA, the input signal is 0 (signal loss).
For a setpoint range of 0 to 20 mA , monitoring
is not possible.
The set time (parameter Perm.op. time, manual
M0570) has been exceeded. The preset
operating time is exceeded for a complete travel
from the OPEN to the CLOSED end position.
Temperature within controls housing too high.
Real time clock has not yet been set.
Voltage of the RTC button cell is too low.
The warning indications are automatically cleared once a new operation command
is executed.
Check valve.
Check parameter Perm.op. time,
manual M0570.
Measure/reduce ambient temperature.
Replace button cell.
Partial Valve Stroke Test
(PVST) could not be
successfully completed.
Check actuator (PVST settings).
Partial Valve Stroke Test
(PVST) was aborted or could
not be started.
Perform RESET or restart PVST.
No actuator reaction to
operation commands within the
set reaction time.
● Check movement at actuator.
● Check parameter Reaction time M0634.
Optical receiving signal (channel
1) incorrect (no or insufficient Rx
receive level) or RS-485 format
error (incorrect bit[s])
Check/repair FO cables.
Warning: FO cable system
reserve reached (critical or
permissible Rx receive level)
Check/repair FO cables
Limit value for torque warning in
direction OPEN exceeded
Check parameter Wrn torque OPEN M0768,
reset if required.
Limit value for torque warning in
direction CLOSE exceeded
Check parameter Wrn torque CLOSE M0769,
reset if required.
SIL sub-assembly fault has
occurred.
See separate Manual Functional Safety.
PVST required
Execution of PVST (Partial
Valve Se Tests) is required.
Maintenance required
Maintenance is required
FQM fail-safe fault
3)
FQM fault
Checking and fault remedy are required. See
the FQM operation instructions.
1. For actuator controls with FOC connection
2. For actuators controls in SIL version
3. For actuators with fail safe unit