Munters HI TEMP Error Code

What does Munters HI TEMP mean?

On a Munters Smart C/D climate controller, HI TEMP is the high temperature alarm. The manual explains it means the average temperature in the building is higher than the temperature set as the alarm's temperature. It warns the operator that the environment has risen above the configured high limit and the controller's cooling response may not be keeping up.

Symptoms

• HI TEMP alarm shown on the main screen, alternating with the normal display
• Measured average building temperature exceeds the set high alarm limit
• Alarm relay activates and the message repeats until conditions return to normal
• Building feels hotter than the target setpoint

Common causes

• Average building temperature has risen above the high alarm temperature
• Cooling or ventilation capacity is insufficient for current conditions
• High alarm temperature is set too low for the situation
• Ventilation devices are not operating as required

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Diagnostic steps

1. Acknowledge the alarm

   Press OK on the main menu to reset the alarm relay; the manual notes the message continues until the problem is resolved.

2. Confirm the actual temperature

   Check the building temperature against the high alarm temperature you configured to confirm the reading is real.

3. Verify cooling and ventilation are running

   Ensure the fans, curtains, and other cooling outputs the controller manages are operating to bring the temperature down.

4. Review the alarm temperature setting

   Check the high alarm temperature in the Alarms menu to confirm it is set appropriately for the current stage.

When to call a professional

Call a qualified technician if the temperature stays above the alarm limit despite cooling running, since livestock or stored product can be at risk during a sustained high-temperature event. The manual also cautions not to open the controller box if a hardware problem arises and to contact an authorized electrician, so involve a professional for any wiring or controller fault behind the alarm.