D146H002 Ed.02
Digital input function (Options available depending on the model)
The digital input function is defined by parameters P10 (D1) and P11 (D2), with the following options:
P10/P11=0: Off (no function)
P10/P11=1: Door contact, controls the activation/deactivation of ECO mode. (p. 11)
P10/P11=2: External alarm, controls activation/deactivation of the external alarm (p. 17).
P10/P11=3: Severe external alarm, controls activation/deactivation of the severe external alarm (p. 17).
P10/P11=4: Slave defrost, activates defrost synchronisation with master unit (p.13).
P10/P11=5: Activation of the ECO mode by pushbutton, controls activation/deactivation of the ECO mode using an
external pushbutton (p. 11).
P10/P11=6: Activation of the fast freezing mode, controls the activation/deactivation of this mode with an
external button (p. 10).
P10/P11=7: Low pressure switch controls the activation/deactivation of the compressor depending on the state of
the low pressure switch when the pump-down function is on (p. 16) (only available in P10 and 4-
relay units)
P10/P11=8: Defrost activation. You can control the activation/deactivation of the defrost using an external
pushbutton connected to the digital input (p. 13).
P10/P11=9: Activation of the ECO mode by switch, controls activation/deactivation of the ECO mode using an
external switch (p. 11).
Digital input polarity (According to model)
Parameters P12 (D1) and P13 (D2) define the polarity of the digital inputs, with the following options:
P12/P13=0: The digital input is energised on closed contact.
P12/P13=1: The digital input is energised on open contact.
Password
Parameter L5 sets a 2-digit access code for accessing certain controller functions. Its functionality is set using the P2
parameter and a choice of several possibilities:
P2=0: Inactive access code; password will never by requested.
P2=1: Blocks access to parameters; will request access code (L5) when trying to access the program menu.
P2=2: Blocks keypad functions; will request the access code (L5) when trying to activate any of the keypad functions
(standby, defrost, fast freezing, program menu, set point change menu, etc.)
Power supply delays
Parameter P1 delays all controller functions when energised, and displays a minute count. It is normally used to
stagger the start-up of various refrigeration services in a single system during the process of start-up or reset after
a period without power. It can also help to avoid repeated system start-ups when tests are carried out on the
facility's electrical system.
IMPORTANT: During the time set in P1, the controller will only show the temperature. It will not control
the system in any way. If additional delays (alarm, protection of the compressor, etc.) have been
programmed, they start to run after the period set by P1.
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