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Troubleshooting and Repair | Laboratory Refrigerators

Identifying Common Issues, Quick Fixes, and When to Seek Professional Assistance

Applicable Models:

TLR-145-1-GD
TLR-200-1-GD
TLR-520-1-GD
TLR-750-2-GD
TLR-950-2-GD
TLR-1500-3-GD

TLR-145-1-SD
TLR-200-1-SD
TLR-520-1-SD
TLR-750-2-SD
TLR-950-2-SD
TLR-1500-3-SD

Alarm Codes

This table lists the On-Screen Alarms for the Dixell XR70 Controller, their causes, and suggested actions:

  • P1: Probe 1 Failure – Call Service.
  • P2: Probe 2 Failure – Call Service.
  • HA: High Alarm (Product Temperature) – The probe in the bottle is above the alarm point.
  • HA2: Possible Probe Fault – Call Service.
  • LA: Low Alarm (Product Temperature) – The probe in the bottle is below the alarm point.
  • LA2: Low Temperature Entering the Cabinet – Possible air blockage in the cabinet.
  • DA: Door Open Alarm – Ensure the door is closed securely.
  • PoF: UP & DOWN Buttons Pressed Simultaneously – Press both buttons until “PoN” appears.

Problem: Temperature of the fridge is running warmer than expected. 

Causes:

  • The condenser may be dirty or blocked.
  • Recently added items may be affecting the internal temperature.
  • Air flow may be blocked.
  • Incorrect offset.

Fix:

  • Clean condenser as described within manual. 
  • If new samples have been added, allow about an hour to see if the temperature stabilises and comes down.
  • Ensure the stock is evenly distributed.
  • Air temperature offset may require to be adjusted.

Problem: PoF is shown on the Dixell Controller.  

Cause:

  • The message "PoF" indicates that the controller is locked.

Fix:

  • Press the UP and DOWN buttons simultaneously until PoN appears.

Problem: Condensation on the outside of the door. 

Cause: 

  • Ambient Humidity is too high. 

Fix:

  • Reduce ambient humidity by improving ventilation or using an air conditioner or dehumidifier in the room.

📞 Contacting Thermoline for Product Information and Support

When reaching out to Thermoline for product information, please have the Serial Number and any other relevant details on hand. The serial number can be found on a white sticker, typically located near the power IEC socket.

For assistance, contact Thermoline Service:

Having this information ready helps us provide efficient and accurate support.