CHAPTER 2 DIAGNOSTIC GUIDEPioneer™ Balance Service Manual 2-1 Ohaus Corporation www.ohaus.com2.1 TROUBLESHOOTINGThis section of the manual provides guidelines for evaluating the condition and performance of abalance, and a standard troubleshooting methodology to follow. Follow all directions step bystep. Make certain that the work area is clean. Handle balance components with care. Use anappropriate Electro-Static Device.2.1.1 General Procedures for Troubleshooting1. Do the most obvious, user-level remedies.2. Perform Ramp check and Service Calibration.3. Check that internal parts are clean and free of debris.4. Inspect the motion of the Ratio Beam: it should move up and down freely.If not, determine if the cause is mechanical binding, or electrical malfunction.5. Make an electrical check of the Ratio Beam: measure the resistance of the coilsin the Ratio Beam.6. Check the InCal Mechanism (if applicable). It should move up and down smoothly.7. Inspect the Load Cell components. Be sure they are clean and that no Flexures arebent. (If they are, they must be replaced.)2.2 DIAGNOSTIC GUIDETable 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 notfix the problem, proceed to the next remedy. Before attempting to repair the balance, read allchapters of this manual to be familiar with the balance components and operation.2.2.1 Diagnosis1. Isolate and identify the symptom2. Refer to Table 2-1, Diagnostic Guide and locate the symptom.Also consult Table 2-2, Error Codes, for solutions to specific Errors.3. Follow the suggested remedies in the order they appear.4. Perform the indicated checks, as summarized in the Section 2.4, GeneralTroubleshooting Procedures, or see the appropriate section of the manual.5. Repair or replace the defective part of the balance.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 furtherinformation.
