OSAKA
- USER MANUAL - B4U - v2 - PAG. 2
The 4 outputs can be used to control the compressor or temperature
control device, the anti-fog heater, the evaporator fans and a
configurable auxiliary device (light, alarm, etc.)
The 3 temperature probe inputs can be used for cell temperature
regulation, for evaporator temperature measurement, for auxiliary
temperature measurement (Product temperature, condenser
temperature, etc.).
There is always a digital input available on the Power Unit B4U and,
as an alternative to the temperature probe inputs Pr2 and Pr3, two
other digital inputs can be configured.
The digital inputs can be configured to perform various functions,
such as door signal, defrost commands, selection of a different set of
temperature regulation, signaling of an external alarm, activation of a
continuous cycle, activation of the auxiliary output, etc.
In addition, the B4U is equipped with a voltage alarm that turns off
the outputs when the voltage is too high or too low.
The selection of the functions and the programming of the
parameters are carried out through the 4 capacitive keys on the B4U
Display.
The connection between the Display B4U and the Power Unit B4U is
made using the LIN cable, a small three-pole cable included.
1.2 - DESCRIPTION OF THE B4U DISPLAY AND THE B4U
POWER UNIT
1 - ON / OFF key:
Pressing for 1 second turns the B4U on / off
(Stand-by).
Pressing for 5 seconds together with the LIGHT key (4), allows
access to the parameter programming mode.
Pressing for 5 seconds together with the DOWN key (3), allows
access to the display mode of the temperature measured by the room
probe, the evaporator temperature (P1 and P2) and in addition to the
maximum (Ht) and minimum (Lt) temperature recorded by the team.
Inside the programming mode by pressing for 3 seconds and
releasing, we exit and return to normal operation.
2 - UP / DEFROST key:
In normal operating mode, pressing and
releasing allows quick access to the Set Point selection and
modification mode.
Pressing for 5 seconds allows activating / deactivating a manual
defrost cycle.
In the programming and display modes of the temperature measured
by the room probe, the evaporator temperature (P1 and P2) and in
addition to the maximum (Ht) and minimum (Lt) temperature
registered by the equipment, is used to select the parameters and
increase the values to be configured.
3 - DOWN / AUX 2 key:
In normal operating mode, pressing and
releasing allows quick access to the Set Point selection and
modification mode.
Pressing for 3 seconds allows activating / deactivating the configured
output configured as A2 (anti-fog heating elements).
In the programming and display modes of the temperature measured
by the room probe, the evaporator temperature (P1 and P2) and in
addition to the maximum (Ht) and minimum (Lt) temperature
registered by the equipment, is used to select the parameters and
decrease the values to configure.
4 - LIGHT button:
Pressing for 2 seconds allows you to manually
activate / deactivate the output configured as light (Auxiliary).
Pressed for 5 seconds, together with the Stand-by key (1), it allows
access to the parameter programming mode.
In programming mode it is used to access parameter editing and to
confirm values.
In programming mode, it can be used in conjunction with the UP key
to modify the parameter programming level.
Pressed for 3 seconds when the keypad is locked, allows the keypad
to be unlocked.
5 - Led SET
: In normal operation mode, lights up when a button is
pressed to indicate that it has been pressed.
In programming mode it is used to indicate the level of parameter
programming.
6 - Led OUT - COOL:
Indicates the status of the regulation output
(compressor or temperature control device); output on (on), output
off (off), or output failed (flashing).
7 - Led DEF
: Indicates that a defrost is being carried out (on) or in a
dripping state (intermittent).
8 - FAN Led:
Indicates the status of the evaporator fan output: ON,
OFF, or failed (flashing).
9 - Led AUX2:
Indicates the activation of the output configured as A2
(anti-fog heating elements).
10 - Led Stand-By / Decimal point:
When the B4U is in Stand-By
mode, it is the only LED that remains lit. In normal operation it is used
as a decimal point separator.
11 - Unit of Measure Led:
Indicates the temperature measurement
unit in use.
POWER UNIT B4U
1 - Led ON
: When it is turned on, for a few seconds, the led shows
solid red indicating that the control is starting. Once started, the LED
starts to blink between a weak red and a more intense one, indicating
the correct operation of the control unit.
2 - TTL communication port
: Used to connect to the following
devices:
USB Key
: to transfer operating parameters to and from the B4U.
Key TTL-RS
: for MODBUS communication via RS485.
X2
:
Remote display that shows the temperature measured by the Pr1
probe.
3 - LIN communication port
: used to communicate the Display B4U
with the Power Unit B4U.