Emerson Fisher FIELDVUE DVC6000 HW2 Instruction Manual page 82

Maintenance and Troubleshooting
June 2017
Table 6‐4. Instrument Troubleshooting
Symptom
3. Instrument will not
3g. Feedback arm bent/damaged or bias spring
calibrate, has sluggish
missing/damaged.
performance or oscillates.
3h. Configuration errors.
3j. Restricted pneumatic passages in I/P converter.
3k. O‐ring(s) between I/P converter ass'y missing or hard
and flattened losing seal.
3l. I/P converter ass'y damaged/corroded/clogged.
3m. I/P converter ass'y out of spec.
3n. Defective module base seal.
3p. Defective relay.
3q. Defective 67CFR regulator, supply pressure gauge
jumps around.
4. ValveLink diagnostic tests
4a. Bent or defective pressure sensor.
provide erroneous results.
4b. Pressure sensor O‐ring missing.
5. Field Communicator does 5a. Battery pack not charged.
not turn on.
82
Possible Cause
Instruction Manual
Action
3g. Replace feedback arm and bias spring.
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. 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. Replace O‐ring(s).
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 assembly if damaged, corroded,
clogged, or open coil.
3m. I/P converter assembly 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. Check module base seal for condition and position. If
necessary, replace seal.
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. Replace 67CFR regulator.
4a. Replace PWB.
4b. Replace O‐ring.
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.
D103785X012