Lainox HIGH TEMPERATURE

What does Lainox HIGH TEMPERATURE mean?

HIGH TEMPERATURE is a HACCP maximum-temperature alarm: the cell temperature has risen above the configured maximum threshold for the conservation phase. The controller stores the alarm in its HACCP log and activates the alarm relay. It warns that stored product may be exposed to unsafe warm temperatures and is driven by the threshold and enable parameters A4 and A5.

Symptoms

• HIGH TEMPERATURE alarm message appears on the controller.
• Cell temperature is above the configured maximum threshold.
• The alarm is stored in the HACCP log.
• The alarm relay output is activated.

Common causes

• Door left open or frequently opened, warming the cell.
• Compressor or refrigeration fault preventing adequate cooling.
• Overloading or warm product placed in the cell.
• Dirty condenser or blocked airflow reducing cooling capacity.
• Incorrect maximum-temperature parameters A4 or A5.

Diagnostic steps

1. 01

   Check the cell temperature

   As the manual directs, confirm the actual cell temperature and how far it has risen above the expected setpoint.

2. 02

   Check parameters A4 and A5

   Verify the value of parameters A4 (maximum temperature threshold) and A5 (alarm enable) so the alarm is set appropriately for the application.

3. 03

   Identify why the cell is warm

   Look for obvious causes such as an open door, recently added warm load, or a refrigeration fault, and address them so the temperature returns below the threshold.

4. 04

   Review the HACCP log

   Because the event is stored as a HACCP alarm, review the log and assess any food-safety implications for product held during the excursion.

When to call a professional

If cell temperature stays high with the door closed and a normal load, the refrigeration system is likely underperforming and needs a technician to check the compressor, condenser, and charge. Because this is a HACCP food-safety alarm, evaluate affected product against your food-safety procedures and arrange qualified service promptly so safe storage temperatures are restored.