Fisher FIELDVUE DVC6200 Instruction Manual page 67

Instruction Manual
D103605X012
Table 6‐3. Instrument Troubleshooting
Symptom
2. Instrument will not
2j. PWB failure.
communicate.
2k. Polling address incorrect.
2l. Defective terminal box.
2m. Defective Field Communicator or ValveLink
modem cable.
2n. ValveLink modem defective or not compatible
with PC.
2p. ValveLink hardlock defective or not programmed.
3. Instrument will not
3a. Configuration errors.
calibrate, has sluggish
performance or oscillates.
3b. Restricted pneumatic passages in I/P converter.
3c. O‐ring(s) between I/P converter ass'y missing or hard
and flattened losing seal.
3d. I/P converter ass'y damaged/corroded/clogged.
3e. I/P converter ass'y out of spec.
3f. Defective module base seal.
3g. Defective relay.
3h. Defective 67CFR regulator, supply pressure gauge
jumps around.
4. ValveLink diagnostic tests 4a. Defective pressure sensor.
provide erroneous results.
4b. Pressure sensor O‐ring missing.
5. Field Communicator does 5a. Battery pack not charged.
not turn on.
Possible Cause
Maintenance and Troubleshooting
Action
2j. Use a 4-20 mA current source to apply power to the
instrument. Terminal voltage across the LOOP+ and LOOP-
terminals should be 8.0 to 9.5 VDC. If the terminal voltage is not
8.0 to 9.5 VDC, replace the PWB.
2k. Use the Field Communicator to set the polling address (refer
to the Detailed Setup section). From the Utility menu, select
Configure Communicator > Polling > Always Poll. Set the
instrument polling address to 0.
2l. Check continuity from each screw terminal to the
corresponding PWB connector pin. If necessary, replace the
terminal box assembly.
2m. If necessary, repair or replace cable.
2n. Replace ValveLink modem.
2p. Replace if defective or return to factory for programming.
3a. Verify configuration:
If necessary, set protection to None.
If Out of Service, place In Service.
Check:
Travel Sensor Motion
Tuning set
Zero Power Condition
Feedback Connection
Control mode (should be Analog)
Restart control mode (should be Analog)
3b. 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.
3c. Replace O‐ring(s).
3d. 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.
3e. 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
assembly if drive signal is continuously high or low.
3f. Check module base seal for condition and position. If
necessary, replace seal.
3g. 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 assembly is good and
air passages not blocked. Check relay adjustment.
3h. 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.
February 2017
67