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Error code · Kolpak · Walk-in coolers & freezers

Kolpak Walk-In Cooler Error Code FLASH MEM ERROR: Internal Controller Alarm

FLASH MEM ERROR is listed by the manual only as an internal controller alarm. It gives no causes and no steps beyond silencing. Press ENTER to silence it for one hour and call a technician to check the controller.

Medium · inspection needed

Medium: an internal controller alarm with no manual explanation, so the controller needs checking.

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Code
FLASH MEM ERROR
Maker
Kolpak
Equipment
Walk-in coolers & freezers
Applies to
ArcticFox OEM Controller with Deluxe Display (Kolpak walk-ins)

What does Kolpak FLASH MEM ERROR mean?

FLASH MEM ERROR is one of the alarms the ArcticFox controller raises about itself. The manual describes it in one phrase, internal controller alarm, and gives no further detail. The name suggests a problem with the controller's flash memory, the storage that holds its program and settings, but the manual does not say what the check is or when it runs, so no one should treat that reading as established. The alarm appears as text in the Alarms menu. Because it is internal, it is not about the room, a door, a sensor or a pressure. What the manual does state is how to quiet it: press ENTER, and it stays silenced for one hour while the condition is addressed, then sounds again if the system is not corrected. Anything beyond that, such as whether settings may have been lost, is for a technician to read from the controller.

Affected models and control systems

ArcticFox OEM Controller with Deluxe Display on Kolpak walk-ins. The manual lists FLASH MEM ERROR in the Alarms menu on page 16 and gives no model or revision limit.

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

  • FLASH MEM ERROR text in the Alarms menu
  • Audible alarm from the display
  • Settings looking different from what was programmed
  • Alarm returning an hour after silencing

Possible causes

Likely causes — what usually sits behind FLASH MEM ERROR on this control. A technician confirms which one it is before any part is replaced.

  • Controller memory problem, which is what the alarm name suggests but the manual does not confirm
  • Power interruption or surge that disturbed the controller while it was writing settings
  • Controller board or Display needing replacement after a repeated alarm

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 sounds again if the condition is not corrected.
  2. Check the room temperature on the display and by thermometer to confirm the walk-in is still cooling.
  3. Do not switch the controller off and on repeatedly. The manual does not recommend it.
  4. Record the alarm text, when it first appeared, and any recent power outage or storm.

How a technician diagnoses FLASH MEM ERROR

  1. Read the alarm and record the current settings before any change.
  2. Compare the stored settings with the installation records to see whether anything was lost.
  3. Check supply voltage and grounding at the controller to rule out power quality problems.
  4. Cycle power once under control and see whether the alarm returns.
  5. Replace the controller or Display only if the alarm repeats after settings are restored.
! Leave this to a technician
  • The manual treats this as an internal controller alarm, which cannot be tested from the operator side.
  • Restoring controller settings needs the room's design values and the controller's own menus.
  • Replacing a controller board means working in a live 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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FLASH MEM ERRORQuestions about Kolpak FLASH MEM ERROR
What does FLASH MEM ERROR mean exactly?

The manual says only that it is an internal controller alarm. It gives no further description.

Will the walk-in stop cooling?

The manual does not say so. Check the room temperature and call a technician for the controller.

Should I reset the controller?

The manual only describes silencing the alarm with ENTER. Leave any reset to a technician.

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