Using The Keypad - Carel PJ32 Serie Manual De Instalación

2.3 User interface, meaning of operating indicators and LED display
Figs. 2.3.1 and 2.3.2 shows the front panel of the plug-in: display and buttons. The front panel of
the instrument features a three-digit display (ref. 4 ) and three LEDs for backlighting the
buttons (refs. 1, 2 and 3 in Fig. 2.3.1), or alternatively three graphic symbols inside the area of
the display (refs. 1, 2 and 3 in Fig. 2.3.2).
These indicate:
this LED indicates the status (on or off) of the actuator controlled, (normally a compressor); the
button is back-lit by a green LED and is available only on the Top models. the button is backlit by
LED or the graphic symbol
The status of the LED can be the following, to indicate:
always on
continuous flashing
flashing with 2 cycles and a pause
Alarm signal: the button is backlit by LED or the graphic symbol
display.
Defrost in progress: the button is backlit by LED or the graphic symbol
the display.
LED. The status of the LED can be:
always on
continuous flashing
THE LED DISPLAY SHOWS ONE OF THE FOLLOWING PIECES OF INFORMATION, ACCORDING TO THE
FUNCTION IN PROGRESS:
• in normal operation: value measured by the ambient probe or the second probe;
• when setting parameters: code of the parameter or the associated value;
• during an alarm event: flashing code of the alarm detected, alternating with the temperature value.
The temperature measured by the probe is displayed with resolution to a degree (ºC or ºF). The display range for the temperature is:
-50T90 ºC (or –50T127 ºF). For the parameters, the values can vary from -99 to +199 and in some cases from -127 to +127. The
unused segments of the left-most digit are normally always off; expansion modules (Serial 485 and HACCP) can be used to signal
states or parameter programming modes. For a complete description please refer to the expansion module manual.

2.3.1 Using the keypad

Three buttons (5, 6 and 7 in Fig.2.3.1) are used to perform the activation and deactivation of the instrument's operating states
and set the parameters. The use of the buttons can be divided into two different situations: one in of normal operation, and the
other to modify the parameters. For each button, the following are the possible actions associated with both possibilities.
In normal operation and if pressed for more than 5 seconds:
• activates/deactivates continuous cycle (compressor).
In modify parameter mode:
• moves from one parameter to the next;
• increases the value of the parameter.
In normal operation:
• silences the audible alarm (only if featured);
• displays and/or sets the Set point;
• if pressed for more than 5 seconds not during an alarm: accesses the menu for setting type 'F' parameters
(frequent);
• if pressed when turning on the instrument, together with the
procedure.
In modify parameter mode:
• displays the value of the selected parameter /exits the display;
• if pressed for more than 5 seconds in modify parameter mode, saves the changes.
In normal operation:
• if pressed for more than 5 seconds: starts a manual defrost, if enabled.
In modify parameter mode:
• moves from one parameter to the previous;
• decreases the value of the parameter.
Cod. +030221881 rel. 1.3 - 03/05/2006
appears on the display.
COMPRESSOR IN OPERATION
request pending for compressor activation
continuous cycle on
defrost in progress
request pending for defrost
Tab. 2.3.2
Tab. 2.3.1
appears on the
appears on
button, activates the parameter RESET
plug-in
Fig. 2.3.1
Fig. 2.3.2
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