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Error code · Kolpak · Walk-in coolers & freezers

Kolpak Walk-In Cooler Error Code LOW MONITOR TEMP2: Monitor2 Below Limit

LOW MONITOR TEMP2 means the Display Monitor2 temperature is below MON TMP2 LO ALRM for longer than MON TMP2 AL DLY. The area on the second monitor input is colder than its low limit. Press ENTER to silence the alarm for one hour and check what is being cooled.

Medium · inspection needed

Medium: a monitored area is colder than its low limit, which can freeze product but does not stop the room.

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

What does Kolpak LOW MONITOR TEMP2 mean?

Monitor2 is an extra temperature input on the Deluxe Display, and it has both a high and a low alarm limit. This alarm is the low side. The controller compares the reading with MON TMP2 LO ALRM. A reading under that limit starts a timer, and only if it stays under for longer than MON TMP2 AL DLY does the text alarm LOW MONITOR TEMP2 appear in the Alarms menu. The delay prevents alarms from short dips, for example just after a defrost or when a cold item is placed near the sensor. The alarm says the reading is low, but it does not say why. The manual lists no causes. A low reading can mean the area is too cold, which can freeze product, or that the sensor is in a cold draft. It sounds again after the one-hour silence if the reading stays low.

Affected models and control systems

ArcticFox OEM Controller with Deluxe Display on Kolpak walk-ins. The manual lists LOW MONITOR TEMP2 in the Alarms menu on page 17. 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

  • LOW MONITOR TEMP2 text in the Alarms menu
  • Audible alarm from the display
  • Monitor2 reading well below its normal value
  • Product near the sensor freezing

Possible causes

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

  • Monitor2 sensor sitting in the direct blast of cold supply air
  • Area under Monitor2 colder than intended because of a high cooling output or a stuck setting
  • MON TMP2 LO ALRM set higher than the area normally runs
  • Cold product placed against the sensor

Safe checks before calling for service

✓ What an operator can do
  1. Press ENTER to silence the alarm for 1 hour. It returns if the reading stays low.
  2. Check whether product near the sensor is freezing, and move it if so.
  3. Make sure nothing is blocking or redirecting the airflow from the evaporator.
  4. Record the Monitor2 reading on the display and the time for the technician.

How a technician diagnoses LOW MONITOR TEMP2

  1. Read MON TMP2 LO ALRM and MON TMP2 AL DLY.
  2. Compare the Monitor2 reading with a calibrated thermometer.
  3. Check the room setpoint and evaporator airflow.
  4. Inspect where the sensor is mounted.
  5. Adjust the cooling, move the sensor or correct the limit, then confirm the reading is back in range.
! Leave this to a technician
  • Cooling adjustments can involve the refrigeration circuit and live fan wiring.
  • Limits and delays are controller programming that should match the installation.
  • Testing the sensor involves a meter on a live controller input.

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.17
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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LOW MONITOR TEMP2Questions about Kolpak LOW MONITOR TEMP2
Does a low reading mean the sensor is broken?

Not necessarily. A broken sensor gives a separate sensor alarm. Here the reading is valid but low.

How is this different from HIGH MONITOR TEMP2?

This is the low limit alarm and the other is the high limit alarm for the same input.

Can product freeze?

Yes, if the area really is that cold. Check with a thermometer and move delicate items.

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