Maintenance and Troubleshooting
December 2009
7-19
Table 7-2. Instrument Troubleshooting (Continued)
Symptom ActionPossible Cause
14. Instrument will not calibrate, has
sluggish performance or oscillates.
14.p Defective relay. 14.p 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
(refer to Replacing the Pneumatic Relay on page
7-8). Check relay adjustment (refer to page 5-4 of the
Calibration Section).
14.q Defective 67CFR regulator, supply pressure gauge
jumps around.
14.q Replace 67CFR regulator.
15. Instrument will not calibrate.
15.a Configuration errors. 15.a Verify configuration.
15.b Feedback arm bent/damaged or bias spring
missing/damaged.
15.b Replace feedback arm and bias spring (see the
Maintenance section). Perform Device Setup (see
page 3-2 of the Basic Setup Section).
15.c Feedback arm loose on travel sensor. 15.c Perform Travel Sensor Calibration procedure
(refer to the Travel Sensor section on page 7-10).
15.d Travel sensor mis-adjusted. 15.d Perform Travel Sensor calibration procedure
(refer to the Travel Sensor section on page 7-10).
15.e Cables not plugged into PWB correctly. 15.e Inspect connections and correct.
15.f Broken travel sensor wire(s). 15.f Inspect wires for broken solder joint at pot
or broken wire. Replace travel sensor (refer to the
Travel Sensor section on page 7-10).
15.g Open travel sensor. 15.g Check for continuity in electrical travel range. If
necessary, replace travel sensor (refer to the Travel
Sensor section on page 7-10).
15.h Travel sensor “frozen”, will not turn. 15.h Rotate feedback arm to ensure it moves freely.
If not, replace the travel sensor (refer to the Travel
Sensor section on page 7-10).
16. ValveLink diagnostic tests provide
erroneous results.
16.a Defective pressure sensor(s). 16.a Replace PWB (see Replacing the PWB
Assembly on page 7-7).
16.b Pressure sensor O-ring(s) missing. 16.b Replace O-ring(s).
17. Cannot perform advanced
diagnostics.
17.a Instrument does not have proper tiering. 17.a Upgrade tiering.
18. A PlantWeb alert is active, but not
reported (broadcast) automatically.
18.a PlantWeb alerts in firmware 1.5 and higher are
mode-based. Transducer block mode may be in MAN
or OOS.
18.a Check transducer block mode. Change to AUTO
if appropriate.
19. Field Communicator does not turn
on.
19.a Battery pack not charged. 19.a Charge battery pack.
Note: Battery pack can be charged while attached to
the Field communicator or separately. The 475 Field
Communicator is fully operable while the battery pack
is charging. Do not attempt to charge the battery pack
in a hazardous area.
7
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