Emerson Fisher FIELDVUE DVC6000, Instruction Manual

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Maintenance and Troubleshooting
September 2013 7-17
Table 7-3. Instrument Troubleshooting (Continued)
Symptom Action Possible Cause
3. Instrument will not
calibrate, has sluggish
performance or oscillates. 3h. Configuration errors. 3h. Verify configuration:
If necessary, set protection to None.
If Out of Service, place In Service.
Check:
Travel Sensor Motion
Tuning set
Zero control signal
Feedback Connection
Control mode (should be Analog)
Restart control mode (should be Analog)
3j. Restricted pneumatic passages in I/P converter. 3j. Check screen in I/P converter supply port of the module
base. Replace if necessary. If passages in I/P converter
restricted, replace I/P converter.
3k. O-ring(s) between I/P converter ass’y missing or hard
and flattened losing seal. 3k. Replace O-ring(s).
3l. I/P converter ass’y damaged/corroded/clogged. 3l. Check for bent flapper, open coil (continuity),
contamination, staining, or dirty air supply. Coil resistance
should be between 1680 - 1860 ohms. Replace I/P assy if
damaged, corroded, clogged, or open coil.
3m. I/P converter ass’y out of spec. 3m. I/P converter ass’y nozzle may have been adjusted. Verify
drive signal (55 to 80% for double-acting; 60 to 85% for
single-acting) with the valve off the stops. Replace I/P
converter ass’y if drive signal is continuously high or low.
3n. Defective module base seal. 3n. Check module base seal for condition and position. If
necessary, replace seal.
3p. Defective relay. 3p. Depress relay beam at adjustment location in shroud, look
for increase in output pressure. Remove relay, inspect relay
seal. Replace relay seal or relay if I/P converter ass’y good
and air passages not blocked. Check relay adjustment.
3q. Defective 67CFR regulator, supply pressure gauge
jumps around. 3q. Replace 67CFR regulator.
4. ValveLink diagnostic tests
provide erroneous results. 4a. Bent or defective pressure sensor. 4a. Replace PWB.
4b. Pressure sensor O-ring missing. 4b. Replace O-ring.
5. Field Communicator does
not turn on. 5a. Battery pack not charged. 5a. Charge battery pack.
Note: Battery pack can be charged while attached to the Field
communicator or separately. The Field Communicator is fully
operable while the battery pack is charging. Do not attempt to
charge the battery pack in a hazardous area.
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