71
Troubleshooting
OMMG00012 Rev 12 – NOV 2019
Check heater continually
powered, not just when
motor is running
Provide separate power
supply
Check actuator cover seal Replace if required
Check indicator window and
seal
Replace if required
Check all cable entries Tighten if loose
Ensure unused cable entries
are plugged
Plug as required
8.1.1 Positioner Status Indicator
The status indicator on the Positioner indicates the status of the Positioner and
Actuator as follows. Further diagnostic checks are described in
OMM47962X00013.
Status Indication Probable Cause Diagnostic Action
Not lit Normal operation None required
Flashing at 2 Hz Input 4 – 20 mA signal out of
range
Check that 4 – 20 mA input
signal is connected and
operating within limits.
Internal actuator fault Investigate
Flashing at 10 Hz Actuator cannot meet input
demand
Check that motor thermal trip
not operated
Internal actuator fault Investigate
8.1.2 Positioner Error Signal
The error signal indicates the status of the positioner and actuator. It is an
open collector output which switches as follows:
• Normal operation – Error signal connection is connected to 0 V
common.
• Fault condition – Error signal rises to input voltage supplied by the EMS.
CAUTION
Failure to observe the current and voltage restrictions on the
Error output terminal will most likely result in permanent damage
to the Error function.
Maximum sink current 25mA
Maximum voltage 30V dc
See wiring diagram Fig 23 on page 65 for connection details.
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