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ALr 48 - Manual shutdown (long touch disable)

In this situation, the cooler has been intentionally placed into a manual shutdown state by an on-site user or technician using the display keypad shortcut. (For SCS 600 this is available for FW 4028.2 onwards. For SCS 800 this is available for all FW versions.)

When this feature is enabled, holding both the Left and Right keypad buttons simultaneously for 2 seconds:

  • Turns off all controller outputs (compressor, fans, lights)

  • Illuminates the Alarm LED

  • Displays OFF on the screen

  • Logs ALr 48 to the event history.

Re-enabling depends on the method:

  • Keypad: press and hold both the Left and Right buttons simultaneously for at least 2 seconds, until the display reverts to the standard temperature readout and normal refrigeration resumes.

  • Power cycle: disconnect and reconnect mains power to clear the manual shutdown state and resume normal operation.

  • Parameter configuration: if accidental shutdowns occur frequently, disable the Long Touch parameter in the controller’s parameter profile using the AoFrio Field app or Cradle app.