Emerson DXP-FF, Installation, Operation & Maintenance Manual

Page: 10 / 40

D-Series with FF Option
Installation, Operation & Maintenance
502.969.8000
10
Section 3: Maintenance
This Section provides information on Troubleshooting and Component Replacement for the DXP-FF.
Troubleshooting
Description of Problem Possible Cause Possible Solution
Red or green LED does not illuminate when
the valve is either in closed or open position
Target not calibrated properly Use calibration procedure on page 7
LED's do not operate, regardless of valve
position Power not connected to FF terminals
LED's not enabled
Make sure at least 9 VDC connected to FF terminals
Transducer block parameter "LED_ENABLE" set to ENABLE
Calibration switch will not operate Transducer Block in incorrect mode
Power not connected to FF terminals
Piezo and spool valve is not pressurized
Set transducer block actual model to "Out of Service"
Make sure at least 9VDC connected to FF terminals
Verify proper air pressure. Reference mechanical
troubleshooting chart
LEDs flash from red to green after valve has
shifted Time to open/close alarm has triggered Target not calibrated properly. Recalibrate using the
procedure on page 7
LEDs flash from red to green as soon as unit
starts moving during a setpoint change Operational setpoints do not match limit switch positions
(i.e. the closed switch is made when the unit has an open
setpoint) Set Transducer Block Action_Element setting according to
chart
Module goes "unattached" from the segment Power dropped below 9V
Excessive noise on the segment
Check voltage to ensure that it is consistently above 9V
Check for loose wire connections
Verify that the segment has a terminating resistor at each
end
Using a Fieldbus Monitor, verify that peak and average
noise levels are <11db
Valve will not shift See mechanical troubleshooting flowchart on page 12
No response from operator interface DO Block and/or DO Channel not correctly assigned
Transducer Block Out of Service
Configuration/DO Block NOT downloaded
Follow troubleshooting chart, (pg. 11) then continue with
mechanical troubleshooting chart (pg. 12). If problem
persists contact the factory
Bad Status on FeedBack Signal and/or No
Feedback signal Transducer Block mode is Out of Service Place Transducer Block in Auto Mode