Pull Down Function; Defrost Operations; Timed Or Temperature Controlled Mode; Automatic Defrost - Emerson Dixell XRi30T Installing And Operating Instructions

FROM TO
Normal Energy
mode Saving
Energy Normal
Saving mode
NOTE: the cycling mode (ES - Normal mode - ES - etc.) works if i1F=dor, EtS and StE are different from
zero. If EtS=0 or StE=0, the controller will not change the operating mode, and it will be possible to change
from the normal mode to the energy saving mode by using the ES button or by setting i1F=ES.

8. PULL DOWN FUNCTION

The Pull Down is automatically activated:
•
After any defrost cycle
•
After power-on if T>SET+CCS
•
When the regulation probe temperature T is:
o
T>SET+HY+oHt value in normal mode
o
T>SET+HES+HYE+oHE value in energy saving mode
In these cases, a different set-point value (SET+CCS) will be used. As soon as the room temperature
reaches the SET+CCS value, the compressor will stop and the normal regulation will restart.
NOTE:
•
Pull Down function is disabled when CCS=0 or CCt=0.
•
The CCt parameter sets the maximum activation time for any pull down. When CCt expires, the Pull
Down will be immediately stopped and the standard SET-POINT will be restored

9. DEFROST OPERATIONS

Any defrost operation can be controlled in the following way:
•
EdF=rtC: by using an internal real-time clock (only for models equipped with RTC)
•
EdF=in: timed defrost, in this case a new defrost will start as soon as the idF timer elapses
9.1

TIMED OR TEMPERATURE CONTROLLED MODE

Two defrost modes are available: timed or controlled by a temperature probe. A couple of parameters are
required to control intervals between defrost cycles (idF) and maximum duration (MdF). During a defrost
cycle it is possible to select some different visualizations by using the par. dFd. Available defrost types are:
•
tdF=EL: with an electric heater
•
tdF=in: by using hot gas cycle
9.2

AUTOMATIC DEFROST

It is possible to automatically start a defrost as soon as the energy saving mode is activated. To do this, set
par. od1=Y.
9.3

OPTIMIZED DEFROST

This function allows to adapt the defrost intervals depending on the real amount of ice on the evaporator
surface. This function requires an evaporator probe properly installed on the evaporator surface. A safety
interval (2*MdF) and an upper temperature limit (dtE) are used to guarantee that every defrost ends also in
case particular conditions should happen. Please set parameters dtE and MdF according to the average
values of your application. As generic note, leave MdF equal to the average value and set dtE some degrees
above the average value.

10. EVAPORATOR FAN

To enable the evaporator fan management it is required to set an evaporator probe (par. FAP). Here are the
involved parameters:
•
FAP: to select the control probe
•
FSt: to select the deactivation set point
1592040010 XRi30-31T EN v1.2 2020.08.26
MODE
Activate the ECO function from Virtual Keyboard screen.
Door continuously closed for StE time.
Activate the ECO function from Virtual Keyboard screen.
Controller in ES mode for EtS time.
If the controller is in ES mode, it returns in Standard mode when the door
stays open more than dS time.
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