Guide12
Quick Fault Finder
Find the symptom, check the first causes listed, then open the full answer from its code.
Weighing & Dispensing
| Code | Problem | First causes to check |
|---|---|---|
| W-01 | Scale Reading Unstable or Drifting | Scale not level or on an unstable bench; Vibration from nearby equipment; Air drafts from doors, vents or extraction |
| W-02 | Display Not Zero or No Display | Residue or an object on the platform; Tare not set; Battery flat or power supply fault |
| W-03 | Daily Verification Out of Tolerance | Scale out of calibration; Check weight damaged, dirty or handled with bare hands; Scale not level or not warmed up |
| W-04 | Dispensed Weight Outside Tolerance | Incorrect tare; Wrong scale for the quantity (below its minimum weight); Calculation error on the dispensing record |
| W-05 | Wrong Material or Batch Dispensed | Similar-looking materials or names; More than one material open at a time; Labels not checked against the BMR |
| W-06 | Raw Material Not Released, Expired or Damaged | Material issued before QA release; Expiry or retest date passed; Packaging damaged in storage or transit |
| W-07 | Powder Clinging to Scoops and Containers | Low room humidity; Plastic tools and containers; Very fine or dry powder |
Sieving & Screening
| Code | Problem | First causes to check |
|---|---|---|
| S-01 | Slow Screening or Low Throughput | Feed rate too high or machine overloaded; Mesh blinded (blocked) by fines or moist powder; Wrong mesh size installed |
| S-02 | Damaged or Torn Mesh | Overloading; Pushing material through with a scoop or hand; Worn or fatigued mesh |
| S-03 | Foreign Matter Found on the Sieve | Contaminated raw material; Packaging fragments (liner, cable tie, label); Equipment or tool fragments |
| S-04 | Excessive Vibration or Noise from the Sieve | Clamps loose; Machine on an uneven surface; Screen assembly not seated |
| S-05 | Product Leaking from the Sieve |
Blending
| Code | Problem | First causes to check |
|---|---|---|
| B-01 | Blend Not Uniform | Blend time too short; Blender overfilled or underfilled; Wrong order of addition |
| B-02 | Lumps in the Blend | Ingredients not sieved; Moisture uptake; Caked raw material |
| B-03 | Segregation After Discharge | Large differences in particle size or density; Over-blending causing de-mixing; Long free-fall during discharge |
| B-04 | Over-Lubrication | Lubricant (e.g. magnesium stearate) blended too long; Lubricant added too early; Lubricant quantity too high |
| B-05 | Blender Will Not Start | Lid or guard interlock not closed; Emergency stop pressed; Power isolated |
Powder Testing
| Code | Problem | First causes to check |
|---|---|---|
| P-01 | Moisture Result Out of Specification | High room humidity; Material exposed too long; Wet equipment |
| P-02 | Inconsistent Moisture Analyser Results | Sample size varies; Sample not spread evenly; Pan not tared or contaminated |
| P-03 | Bulk or Tapped Density Out of Specification | Cylinder filled with compaction; Wrong number of taps; Sample not representative |
| P-04 | Poor Powder Flow | Fine or irregular particles; High moisture or static; Insufficient glidant |
Cleaning, Environment & Yield
| Code | Problem | First causes to check |
|---|---|---|
| C-01 | ATP Swab Result CAUTION or FAIL | Residue left on the surface; Inadequate cleaning or rinsing; Swab taken from a wet surface |
| C-02 | Final Rinse Conductivity Failure | Detergent residue remaining; Insufficient rinse volume; Poor-quality rinse water |
| C-03 | Residue or Moisture Found on Released Equipment | Incomplete cleaning; Hard-to-reach areas missed; Equipment not dried |
| C-04 | Temperature or Humidity Out of Specification | HVAC fault; Doors left open; High external humidity |
| C-05 | Line Clearance Failure |
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