Kolpak Walk-In Cooler Error Code MONITOR TEMP2 SENSOR ALARM: Temp 2 Open or Shorted
MONITOR TEMP2 SENSOR ALARM means the Temp 2 input is shorted or open. On the stand-alone Display, that input is being used as a monitor sensor and cannot be read. Check the active alarms in the Alarms & Variables menu and have the sensor circuit tested.
Low: one monitor reading is lost, and the manual does not say cooling stops.
- Code
- MONITOR TEMP2 SENSOR ALARM
- Maker
- Kolpak
- Equipment
- Walk-in coolers & freezers
- Applies to
- ArcticFox Deluxe Display, stand-alone
What does Kolpak MONITOR TEMP2 SENSOR ALARM mean?
The stand-alone Deluxe Display has three temperature inputs, and Temp 2 can be used either as a room sensor or as a monitor sensor. The monitor role is meant to watch some other spot, such as product or a shelf. Here the manual's wording for the alarm is MONITOR TEMP2 SENSOR ALARM, and its meaning is that the Temp 2 input is shorted or open. In that state there is no real resistance reading to convert to a temperature. The Display flags it as a text alarm in the Alarms & Variables menu. Notice that the manual gives the same meaning for ROOMTEMP2 SENSOR ALARM; the name changes with how the input is used, and the electrical condition does not. The manual lists a DISP CLEAR ALARM variable to clear alarms set in the Display but gives no causes or repair steps.
Affected models and control systems
ArcticFox Deluxe Display, stand-alone, on Kolpak walk-ins. The manual lists this alarm in the Alarms & Variables menu on page 9 of the stand-alone section.
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
- MONITOR TEMP2 SENSOR ALARM in the Alarms & Variables menu
- Alarm indication on the Display
- No monitor temperature shown
- High and low monitor alarms not working
Possible causes
Likely causes — what usually sits behind MONITOR TEMP2 SENSOR ALARM on this control. A technician confirms which one it is before any part is replaced.
- Monitor sensor on Temp 2 disconnected or its lead cut
- Lead squeezed or rubbed through by moving shelving
- Water in the probe or connector
- Temp 2 assigned as a monitor input but the sensor never fitted
Safe checks before calling for service
- Scroll the Alarms & Variables menu to see which alarms are active.
- Check the monitored area with a thermometer and compare with what the Display shows.
- Look at the visible lead for damage. Do not unplug or cut anything.
- Report the alarm names and your thermometer reading to the technician.
How a technician diagnoses MONITOR TEMP2 SENSOR ALARM
- Read the active alarms and confirm Temp 2 is set up as a monitor input.
- Inspect the sensor and lead.
- Measure resistance at the sensor and compare with the chart, then test continuity and isolation.
- Repair or replace the sensor and lead.
- Clear the alarm and confirm no return.
- The lead terminals sit inside the powered Display.
- The monitor sensor may be protecting product, so accurate repair matters.
- Clearing the alarm without repair only hides it.
Technical reference
- Document
- ArcticFox Deluxe Display - Original Instructions, Installation, Operation and Maintenance Manual
- Edition
- Part No. 500002385-4, 5/23
- Models / control
- ArcticFox Deluxe Display, stand-alone
- Section
- Deluxe Display - Stand Alone - Alarms & Variables Menu, p.9
- 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.
Related Kolpak walk-in cooler & freezer error codes
Why does the manual list the same meaning for ROOMTEMP2 SENSOR ALARM?
The condition is the same, a shorted or open Temp 2 input. The name reflects how the input is used.
Do the high and low monitor alarms still work?
They depend on a valid reading, so they cannot work while the input is shorted or open.
Is the monitored product at risk?
The alarm does not measure temperature. Check the area with a thermometer.
Need help with Kolpak MONITOR TEMP2 SENSOR ALARM?
A technician confirms the cause on site and gives you the price in writing before any work starts.