Economy Mode; Holiday Mode (Applicable For Eeta Only); Dual Evaporator Defrost (Applicable For Eeta Only); Dual Compressor Control (Applicable For Eeta Only) - Danfoss EET Series User Manual

Refrigeration controller, type EET series

Economy mode

This feature helps save energy by increasing the setpoint when the normal cooling demand is not required. ECO
mode is triggered when the door is closed for more than the time specified by the parameter 'Edd' . ECO mode can
also be triggered manually via Di input. In some cases, this feature is meant to decrease the setpoint and thereby
enabling extra cooling when the power is cheaper at night time.
Figure 8: Eco mode
Door Open
Door Close
Eco delay
(Edd)
Normal mode

Holiday mode (applicable for EETa only)

This feature allows for more energy savings during vacation/ Holiday period by off-setting the setpoint when there
is no usage for a prolonged period. If there is no door activity detected after entering ECO mode for the period that
has been configured under parameter "Holiday length", it enters into Holiday mode. The entry into Holiday mode
happens by time passing by and is exited by door action. Holiday mode can also be triggered manually via digital
input.
Figure 9: Holiday mode
Door Open
Door Close
Eco delay Holiday Length
(Edd)
Normal mode ECO mode

Dual evaporator defrost (applicable for EETa only)

The EETa can control refrigeration cabinets with two defrost heaters and two evaporator sensors in combination.
This feature provides more flexibility to the refrigeration system design and provides the most efficient defrost
handling. The controller can control defrost with both a single heater and two evaporator sensor inputs as well as
two heaters with two evaporator sensor inputs.

Dual compressor control (applicable for EETa only)

Certain refrigeration systems need more than one refrigeration circuit to handle the cooling requirements of the
cabinet while meeting other statutory requirements (for ex: Flammable Refrigerant qty). The EETa controller comes
with a feature that can handle two compressors which can be operated with time delay (Scd).
 NOTE:
The second compressor can be configured to any of the auxiliary relays and might require an external relay, if the
rated current of the second compressor is more than the auxiliary relay ratings.
© Danfoss | Climate Solutions | 2023.07
ECO mode Normal mode
Time
(HoL)
Holiday mode Normal mode
Time
BC320944106159en-000301 | 8