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Error code · Kolpak · Walk-in coolers & freezers

Kolpak Walk-In Cooler Error Code HIGH MONITOR TEMP2: Monitor2 Above Limit

HIGH MONITOR TEMP2 means the Display Monitor2 temperature is above MON TMP2 HI ALRM for longer than MON TMP2 AL DLY. Something being watched on the second monitor input is too warm. Press ENTER to silence the alarm for one hour and check what that sensor is measuring.

Medium · inspection needed

Medium: a monitored area is above its limit, and product there may be at risk.

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Code
HIGH MONITOR TEMP2
Maker
Kolpak
Equipment
Walk-in coolers & freezers
Applies to
ArcticFox OEM Controller with Deluxe Display (Kolpak walk-ins)

What does Kolpak HIGH MONITOR TEMP2 mean?

The Deluxe Display can read extra temperature sensors as monitor inputs, which are used to watch a spot other than the room control sensor. Monitor2 is the second of these. The controller compares the Monitor2 reading with the high limit MON TMP2 HI ALRM. Being above it is not enough. The reading has to stay above for longer than MON TMP2 AL DLY, which keeps the alarm from firing during a short warm spell. When both are true, the text alarm HIGH MONITOR TEMP2 appears in the Alarms menu. The manual does not say what Monitor2 is attached to; that depends on the installation. It might watch product, a shelf, or a second zone. The alarm is separate from the sensor-failure alarms, since the controller got a valid reading. It sounds again after one hour if the reading stays high.

Affected models and control systems

ArcticFox OEM Controller with Deluxe Display on Kolpak walk-ins. The manual lists HIGH MONITOR TEMP2 in the Alarms menu on page 16. It needs a Monitor2 sensor on the Display.

Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.

What you may notice

  • HIGH MONITOR TEMP2 text in the Alarms menu
  • Audible alarm from the display
  • Monitor2 temperature reading warm
  • Product or area near the Monitor2 sensor feeling warm

Possible causes

Likely causes — what usually sits behind HIGH MONITOR TEMP2 on this control. A technician confirms which one it is before any part is replaced.

  • Area watched by Monitor2 genuinely warming because of the door, load or cooling
  • Monitor2 sensor placed near a heat source or in the airflow of a warm return
  • MON TMP2 HI ALRM set low for the area the sensor watches
  • Delay MON TMP2 AL DLY set short for normal loading

Safe checks before calling for service

✓ What an operator can do
  1. Press ENTER to silence the alarm. It stays quiet for 1 hour and returns if the reading stays high.
  2. Find where the Monitor2 sensor is and feel or measure the temperature of that area with a thermometer.
  3. Close the door and clear any blockage to the evaporator airflow.
  4. Note the Monitor2 temperature on the display and compare with the thermometer for the technician.

How a technician diagnoses HIGH MONITOR TEMP2

  1. Read MON TMP2 HI ALRM and MON TMP2 AL DLY.
  2. Compare the Monitor2 reading with a calibrated thermometer.
  3. Check evaporator airflow, defrost state and door seal.
  4. Inspect the sensor position and cable.
  5. Correct the cooling cause or reposition the sensor, then confirm the reading falls below the limit.
! Leave this to a technician
  • Diagnosing cooling performance involves refrigerant circuit measurements.
  • Alarm limits and delays are programmed values that belong with the room's design.
  • Checking the sensor cable runs into a live controller enclosure.

Technical reference

Document
ArcticFox Deluxe Display - Original Instructions, Installation, Operation and Maintenance Manual
Edition
Part No. 500002385-4, 5/23
Models / control
ArcticFox OEM Controller with Deluxe Display (Kolpak walk-ins)
Section
ArcticFox OEM Controller - Alarms Menu, p.16
Checked
October 2026

We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.

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HIGH MONITOR TEMP2Questions about Kolpak HIGH MONITOR TEMP2
What is Monitor2?

It is the second extra temperature input on the Display. What it watches depends on the installation.

Is this the same as HIGH MONITOR TEMP2 ALARM?

They describe the same condition on different setups. This one is for the OEM controller with Display. The other is for the stand-alone Display.

Do I need to throw out product?

Check the actual temperature with a thermometer and follow your food safety rules. The alarm alone does not say how long it was high.

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Need help with Kolpak HIGH MONITOR TEMP2?

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