TS VLF Refrigeration Not Circulating Repair Case

Note: The following content is developed based on English/code error interpretation and distinguishes between 'possible causes' and 'confirmed conclusions'; do not present possible causes as confirmed root causes.

1. Fault Symptom

TS VLF (laser head model registered: th1.7) field record: Refrigeration not circulating.

2. What the Error Message Means (English Prompt)

Cooling system circulation abnormal, refrigeration pump not working properly.

• Associated module (inferred): power / driver board (classification based on alarm text, can be revised based on measurements).

3. Possible Causes (Not Conclusions)

The following are possible causes; do not present them as confirmed faults before verification:

1. Possible: Loose connection or open circuit in refrigeration pump power supply wiring.
2. Possible: Power board output voltage below 24V.
3. Possible: Refrigeration pump internal fault causing abnormal load.
4. Possible: Control system signal not correctly driving the pump.

4. Diagnostic Direction

1. Check refrigeration pump supply voltage (should be 24V).
2. Measure power board output voltage.
3. Check power supply wiring connections for secure fit.
4. Measure refrigeration pump coil resistance for normalcy.
5. Check control system drive signal to the pump.
6. If supply voltage is insufficient, inspect the power board or external power supply.

• Repair direction: After confirming insufficient supply voltage to the refrigeration pump, increase supply voltage to 24V by adding an independent power supply or repairing the original power board, and ensure wiring is secure.

5. What Was Checked (Engineer's Inspection)

Refrigeration pump supply voltage below 24V; added power supply and rewired.

6. Confirmed Root Cause (Traceable)

Engineer records and analysis point to the root cause: refrigeration pump supply voltage below 24V. Note: This section is written only when sufficient traceable information is available from the work order; otherwise, keep the conclusion open.

• Uncertainty: Root cause confirmed through direct measurement and repair; no additional uncertainty.
• Writing perspectives:
  • Case study of CTP refrigeration not circulating caused by insufficient pump power supply.
  • Common causes and repair methods for power board output 24V anomaly.
  • Power reliability of CTP system from the perspective of refrigeration circulation failure.
  • How to quickly locate refrigeration pump faults through voltage measurement.
  • Precautions for adding auxiliary power supply in CTP maintenance.

7. Repair Solution Summary

(No parts replacement recorded.)

• Final repair method summary: Refrigeration pump supply voltage below 24V; added power supply and rewired.

8. Final Test Result and Recheck

Refrigeration pump supply voltage below 24V; added power supply and rewired.

9. On-site Image Index