Nor-Lake Walk-In Error Code Pbt: Panic Button Alarm
Pbt on a Nor-Lake Split-Pak walk-in with a LogiTemp or KE2 Evap controller means the panic button on the combo display has been pressed and is active, shown as HELP. Check that nobody is trapped in the box, since the manual's Troubleshooting Tables give the clearing actions.
High: it may mean someone needs help in the box, and the button is a safety device.
- Code
- Pbt
- Maker
- Nor-Lake
- Equipment
- Walk-in coolers & freezers
- Applies to
- LogiTemp / KE2 Evap OEM controller on Nor-Lake Split-Pak refrigeration systems (A1 refrigerants)
What does Nor-Lake error code Pbt mean?
Pbt is the Panic Button Alarm in the Alarms and Notifications list of the LogiTemp controller on Nor-Lake Split-Pak systems. The combo display is fitted with a panic button, intended for someone inside the walk-in who needs help. When the button is pressed and active, the controller shows Pbt and the scrolling text HELP. This is a safety call rather than a refrigeration reading, so nothing in the box needs to be warm or cold for it to appear. The manual's list states the meaning and sends the reader to the Troubleshooting Tables from page 52. It does not describe causes. The first response is human: find out whether someone pressed it on purpose. If nobody did, the button may be stuck, or its wiring may be shorted.
Affected models and control systems
Pbt is listed for the LogiTemp and KE2 Evap OEM controller on Nor-Lake Split-Pak refrigeration systems with A1 refrigerants, in the Alarms and Notifications list printed on pages 48-52. It relates to the panic button on the combo 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
- Pbt or HELP on the display
- Panic alarm active without any temperature alarm
- Alarm output or horn, if connected
Possible causes
Likely causes — what usually sits behind error code Pbt on this control. A technician confirms which one it is before any part is replaced.
- Panic button on the combo display pressed and active
- Person inside the box pressed the button for help
- Button stuck in after being struck by a cart or box
- Button wiring shorted or wet
Safe checks before calling for service
- Make sure no one is inside the walk-in who needs help.
- Look at the panic button to see whether it is stuck down.
- Do not take the display apart.
- If the alarm is false, note it and call service.
- Write down the time and who was in the area, for the technician.
How a technician diagnoses error code Pbt
- Read the alarm and confirm the panic input state.
- Inspect the button for physical sticking.
- Check the button wiring for a short or moisture.
- Test the input with a meter.
- Replace the button or repair wiring if it fails.
- Check the manual's Troubleshooting Tables for the listed action.
- A walk-in panic button is a safety device and should not be bypassed.
- Display wiring carries controller power.
- A false alarm can hide a real call for help, so repair is not left to guesswork.
How error code Pbt differs from similar codes
Pbt is a safety input, unlike the temperature and sensor alarms in the same list.
Technical reference
- Document
- LogiTemp Electronic Controller System Operations Manual for Split-Pak Refrigeration Systems Containing A1 Refrigerants
- Edition
- 171527 Rev. A, 2025 (Refrigerated Solutions Group)
- Models / control
- LogiTemp / KE2 Evap OEM controller on Nor-Lake Split-Pak refrigeration systems (A1 refrigerants)
- Section
- Alarms & Notifications List, printed pp. 48-52; Troubleshooting Tables from p. 52
- 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 Nor-Lake walk-in cooler & freezer error codes
What should I do first when Pbt shows?
Check that nobody needs help inside the walk-in.
Can I silence Pbt?
The manual refers to its Troubleshooting Tables. Do not disable a safety button.
Is Pbt a cooling problem?
No. It is a panic call, not a temperature reading.
Need help with Nor-Lake error code Pbt?
A technician confirms the cause on site and gives you the price in writing before any work starts.