Instruction Manual
D102748X012
Maintenance & Troubleshooting
October 2014
71
Section 6 Maintenance & Troubleshooting6‐6‐
The DLC3010 digital level controller features a modular design for easy maintenance. If you suspect a malfunction,
check for an external cause before performing the diagnostics described in this section.
Sensor parts are subject to normal wear and must be inspected and replaced as necessary. For sensor maintenance
information, refer to the appropriate sensor instruction manual.
WARNING
To avoid personal injury, always wear protective gloves, clothing, and eyewear when performing any maintenance
operations.
Personal injury or property damage due to sudden release of pressure, contact with hazardous fluid, fire, or explosion can
be caused by puncturing, heating, or repairing a displacer that is retaining process pressure or fluid. This danger may not
be readily apparent when disassembling the sensor or removing the displacer. Before disassembling the sensor or
removing the displacer, observe the appropriate warnings provided in the sensor instruction manual.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
CAUTION
When replacing components, use only components specified by the factory. Always use proper component replacement
techniques, as presented in this manual. Improper techniques or component selection may invalidate the approvals and
the product specifications, as indicated in table 1‐1. It may also impair operations and the intended function of the device.
Diagnostic Messages
In addition to the output, the LCD meter displays abbreviated diagnostic messages for troubleshooting the digital
level controller. To accommodate two‐word messages, the display alternates between the first and second word. The
meter displays messages simultaneously on the Process Variable and Process Variable Unit lines as shown in figure 6‐1.
Messages on the Process Variable line refer to general device conditions, while messages on the Process Variable Unit
line refer to specific causes for these conditions. A description of each diagnostic message follows.
D [BLANK]— If the meter does not appear to function, and the instrument is otherwise functioning correctly, make
sure the digital level controller is configured for the LCD meter. The meter will not function if the LCD Configuration
selection is “Not Installed.” To check this function, connect the Field Communicator to the digital level controller
and turn it on. From the Online menu, select:
Configure > Manual Setup > Instrument Display > LCD Configuration (2-2-5-1)
For information on setting up the LCD meter see page 47. A diagnostic test for meter function is also detailed later
in this section.
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