Electronic Control Startup:

Turn the switch if equipped into the ON position. After a 2- minute delay, the compressor and the condenser fan should start. The evaporator fan motors and the light fixture will operate immediately when power is applied. The condensing unit will continue to run until the air temperature in the cabinet reaches +16°F. Note: If a defrost is required upon startup the controller will enter defrost mode after the 2- minute delay. Normal operation will resume upon defrost termination and a short drip time.


Operating Mode Display:

  • Snowflake “ON” – compressor enabled in run cycle; control displays current cabinet temperature.
  • Snowflake “Flashing” – anti short cycle delay enabled to protect the compressor from trying to start too frequently.
  • Melting Snowflake “ON” – defrost in progress, control displays the letters “DE” • To view the control’s programmed “Set Point” (cut-out temperature): press and release the “Set Key.”
  • To initiate a manual defrost cycle: press and hold the “Manual Defrost Key” for more than 2 seconds. Note: Manual Defrost will not initiate unless the unit is at standard operating temperatures.

Possible Displayed Alarm Codes:

  • “P1” – Air Probe failure: The control will override the “P1” functions and cycle the compressor at 5-minute intervals, until the probe fault can be corrected.
  • “P2” – Evaporator Probe failure: The control will override the “P2” function and operate with a timed defrost cycle, until the probe fault can be corrected.
  • “HA” – Maximum Temperature Alarm: The cabinet air temperature has exceeded programmed temperature for a period exceeding 15 minutes. The alarm will continue to display until the cabinet temperature drops below maximum levels.
  • “LA” – Minimum Temperature Alarm: The cabinet air temperature has dropped below the programmed minimum. This alarm will continue to display until the cabinet temperature rises above the minimum level.

  • Note: Should a “P1” or “P2” alarm occur, check the probe wire connections to the control prior to replacing the probe wire.

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