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Installation and Maintenance Instructions
MAN-02-04-99-0712-EN Rev. 1
February 2020
Maintenance and Troubleshooting
Section 7: Maintenance and Troubleshooting
7.2.6 The Valve does not Seat Correctly
• If the valve is stopped by torque in closing, increase the actuator output torque limit
• If the valve is stopped by position in closing, check that the valve reaches its seat
position and then re-adjust the setting of the position limit
• The internal trim of the valve may be damaged
7.2.7 Excessive Torque for Valve Operation
• Clean, lubricate, and check the valve stem
• If the valve packing is too tight, loosen the gland bolt nuts
• Check that the internal valve trim or the reducer gears are well lubricated and
not damaged
7.2.8 The Actuator does not Stop in Fully Open or Fully
Closed Position
• Check that the actual open and closed positions of the valve respectively
correspond to 100% and 0%
• Make sure that the torque and travel limits are correctly set (see Section 6)
7.2.9 Diagnostic LED
For more detailed alarms, check the diagnostic LED status (on the logic board). Diagnostic
codes are shown in the below table:
Table 7.
Number of blinks of the diagnostic LED Description
1x Actuator in intermediate position (NO ALARM)
2x Actuator on CLOSE limit (NO ALARM)
3x Actuator on OPEN limit (NO ALARM)
4x Under-voltage warning on Internal secondary voltage
5x Position Sensor alarm (no SPI communication)
6x High temperature alarm
7x Bad CRC, OM1 communication error alarm
8x Motor over-current alarm
9x Stroke limit alarm
10x Jammed Valve alarm
11x High torque alarm
If a Sensor Alarm (5x blinks of the diagnostic LED) is observed:
• Check that the position sensor cable is connected.
• Check that the position sensor enclosure is not mechanically damaged. If it is
broken, replace the entire electronic group.
If a bad CRC, OM1 communication error Alarm (7x blinks of the diagnostic LED) is observed:
• Restart the power supply: turn off and then turn on the actuator.
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