Lainox LOW TEMPERATURE

What does Lainox LOW TEMPERATURE mean?

LOW TEMPERATURE is a HACCP minimum-temperature alarm: the cell temperature has fallen below the configured minimum threshold for the conservation phase. The controller stores the alarm in its HACCP log and activates the alarm relay. It warns that the cell is colder than intended and is governed by the threshold and enable parameters A1 and A2.

Symptoms

• LOW TEMPERATURE alarm message appears on the controller.
• Cell temperature is below the configured minimum threshold.
• The alarm is stored in the HACCP log.
• The alarm relay output is activated.

Common causes

• Setpoint or minimum-temperature parameter set too low.
• Compressor running longer than needed due to a control fault.
• Probe placement or fault causing an over-cold reading.
• Incorrect minimum-temperature parameters A1 or A2.
• Ambient or load conditions allowing the cell to overcool.

Diagnostic steps

1. 01

   Check the cell temperature

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

2. 02

   Check parameters A1 and A2

   Verify the value of parameters A1 (minimum temperature threshold) and A2 (alarm enable) so the alarm is set appropriately for the application.

3. 03

   Review the setpoint and product

   Confirm the conservation setpoint is correct for the product and that the over-cold condition is not simply an aggressive setting.

4. 04

   Review the HACCP log

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

When to call a professional

If the setpoint and parameters are correct but the cell keeps overcooling, the compressor control or temperature probe may be faulty and should be checked by an authorised technician. Because this is a HACCP-logged alarm, document the excursion per your food-safety procedures and arrange qualified service if the cause is not an obvious parameter or setpoint error.