Diagnostic Guide - OHAUS NV212 Service Manual

CHAPTER 2 DIAGNOSTIC GUIDE

2 DIAGNOSTIC GUIDE

This section of the manual contains troubleshooting information. Information is contained to isolate
specific problems using Table 2-1, Diagnostic Guide. Follow all directions step by step. Make certain
that the work area is clean. Handle scale components with care. Use appropriate electro-static
protection devices to prevent damage to the sensitive electronic components.
2.1 TROUBLESHOOTING
2.1.1 General procedures for Troubleshooting
1. Do the most obvious, user-level remedies.
2. Visual Check:
- Check that the internal parts are clean and free from debris.
- Examine the scale for damage or signs of abuse, replace any damaged items.
- Examine the load cell for signs of bending, twisting or corrosion.
- Check the overload stops, adjust if necessary. (see Section 3.6)
3. Use the error code table for solutions for specific codes.
4. Use the Diagnostic Guide; locate the symptom then follow the suggested remedies in order.
2.2 DIAGNOSTIC GUIDE
Table 2-1 is a Diagnostic Guide designed to help locate the problem area quickly and easily. The
probable causes are listed with the most common cause first. If the first remedy does not fix the
problem, proceed to the next remedy. Before attempting to repair the scale, read all chapters of this
manual to be familiar with the scale components and operation.
Diagnosis:
1. Isolate and identify the symptom.
2. Refer to Table 2-1, Diagnostic Guide and locate the symptom.
3. Follow the suggested remedies in the order they appear.
4. Perform the indicated checks, or see the appropriate section of the manual.
5. Repair or replace the defective section of the scale.
NOTE:
If more than one symptom is observed, approach one area at a time, and remember that
the symptoms may be interrelated. If a problem arises that is not covered in this manual,
contact Ohaus Corporation for further information.
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