Maintenance
March 2006
10-19
Table 10-2. Instrument Troubleshooting (Continued)
Symptom ActionPossible Cause
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 Setup Wizard (see
page 4-2 of the Basic Setup and Tuning Section).
15.c Feedback arm loose on travel sensor. 15.c Perform Travel Sensor Calibration procedure
(refer to the Travel Sensor section on page 10-9).
15.d Travel sensor mis-adjusted. 15.d Perform Travel Sensor calibration procedure
(refer to the Travel Sensor section on page 10-9).
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 10-9).
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 10-9).
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 10-9).
16. ValveLink diagnostic tests provide
erroneous results.
16.a Defective pressure sensor(s). 16.a Replace PWB (see Replacing the PWB
Assembly on page 10-7).
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. Field Communicator does not turn
on.
18.a Battery pack not charged. 18.a Charge battery pack.
Note: Battery pack can be charged while attached to
the Field communicator or separately. The 375 Field
Communicator is fully operable while the battery pack
is charging. Do not attempt to charge the battery pack
in a hazardous area.
10
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