Traulsen Low Temperature Alarm

What does Traulsen Low Temperature Alarm mean?

The Intela-Traul controller signals a low-temperature alarm when the cabinet runs colder than its low-temperature limit. It indicates the box is overcooling relative to the setpoint, which can over-freeze product. On hot food units note that the cabinet holds hot food at temperature and is not designed to heat cold product, so a cold reading is normal for empty hot-food cabinets.

Symptoms

• Alarm LED illuminated and horn sounding on the control
• Cabinet colder than the programmed setpoint
• Product over-chilled or frozen unexpectedly
• Compressor running continuously

Common causes

• Temperature setting for the unit is too low
• No food product in the unit
• Failed compressor relay
• Sensor probe not properly connected, or a failed sensor

Diagnostic steps

1. 01

   Check the setpoint

   If the temperature setting is too low, increase the operating temperature to the correct value.

2. 02

   Add product

   If the unit is empty, add product to the unit so the load matches the control's expectation.

3. 03

   Check the compressor relay

   Check for a failed compressor relay; if not OK, replace the failed controller or slave relay.

4. 04

   Verify sensor connections

   Confirm the sensor probe(s) are properly connected and reconnect if needed.

5. 05

   Replace a failed sensor

   If the probe checks out as connected but readings are wrong, replace the failed sensor.

When to call a professional

Call a technician if the alarm continues after correcting the setpoint and load, especially when a failed compressor relay or controller is suspected. Replacing the controller, slave relay, or sensors involves disconnecting line-voltage connections and verifying components with a meter; this is service-technician work, and mis-wiring the control can damage the unit.