Instruction Manual
D103785X012
Maintenance and Troubleshooting
June 2017
82
Table 6‐4. Instrument Troubleshooting
ActionPossible CauseSymptom
3. Instrument will not
calibrate, has sluggish
performance or oscillates.
3g. Feedback arm bent/damaged or bias spring
missing/damaged.
3g. Replace feedback arm and bias spring.
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 assembly if damaged, corroded,
clogged, or open coil.
3m. I/P converter ass'y out of spec. 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. 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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