Samson 4749, Mounting And Operating Instructions, Page: 52 / 92

9-2 EB 4749 EN
Malfunctions
Table 9-1: Error messages
Reading: green LED blinks
Error status Maintenance demanded
Cause − Internal pulse generator (crystal oscillator) has failed.
Impact − Output rate of 1 ms cannot be maintained.
− The device continues to run at a slower output rate.
Recommended action
Î
Replace the device during the next service routine.
Î
Contact SAMSON's After-sales Service.
Reading: red LED blinks
Error status Out of specification
Cause − Temperature limits have been exceeded.
− Adjusted measuring range is too small (span error).
Impact − Position measurement is not possible.
− The residual current I ≤ 3.6 mA is issued at the output.
Recommended action
Î
Run the device within specification
(see technical data in the 'Design and principle of operation' section).
Î
Check positioner attachment, lever and pin position (see the 'Installati-
on' section).
Î
Check the control valve to ensure it functions properly.
Î
Check power supply/electrical signal.
Î
Adjust zero and span (see the 'Start-up' section).
Reading: red LED illuminated
Error status Failure
Cause − Defect in the electronics or memory error
− The device is not running within specification
Impact − Position measurement is not possible.
− The residual current I ≤ 3.6 mA is issued at the output.
Recommended action
Î
Press

key to reset.
Î
Contact SAMSON's After-sales Service if the error message reoccurs.