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DIGITAL CONTROLLER
TX050
1. GENERAL WARNINGS
PLEASE READ BEFORE USING THIS MANUAL
•
This manual is part of the product and should be kept near the
instrument for easy and quick reference.
•
The instrument shall not be used for purposes different from
those described hereunder. It cannot be used as a safety device.
•
Check the application limits before proceeding.
SAFETY PRECAUTIONS
•
Warning: disconnect all electrical connections before any kind
of maintenance.
•
The instrument must not be opened.
•
In case of failure or faulty operation send the instrument back to
the distributor or to "Pavarini Components S.p.A." (see address
at page 6) with a detailed description of the fault.
•
Consider the maximum current which can be applied to each
relay (see Technical Data).
2. GENERAL DESCRIPTION
The TX050, in 32x74x50 mm short format, is microprocessor based
controller suitable for applications on normal temperature refrigerating
units. It provides two relay output: one for compressor and the other
one for alarm signalling or as auxiliary output. It provides an NTC probe
input for thermostatic regulation and a digital input. The instrument is
completely configurable thanks to its keyboard.
3. REGULATION
The regulation is performed
according to the temperature
measured by the thermostat
probe
with
a
positive
differential
from
the
set
point:
if
the
temperature
increases and reaches set
point plus differential (Hy)
the compressor is started
and then turned off when the
temperature reaches the set
point value again.
In case of fault in the thermostat probe the start and stop of the
compressor are timed through parameters Cy and Cn.
4. FRONT PANEL COMMANDS
Instruction manual
To display target set
point. In programming
mode it selects a
parameter or confirm
an operation.
To switch on/off the
auxiliary relay in case
it's present.
In programming mode it
browses the parameter
codes or increases the
displayed value.
In programming mode it
browses the parameter
codes or decreases the
displayed value.
- 4 -
KEYS COMBINATION
+
To lock or unlock the keyboard.
+
To enter in programming mode.
+
To return to room temperature display.
+
Press for at least 5s to reset to default
settings.
LED
MODE
On
Flashing
On
Flashing
On
Flashing
In case of alarm showing with memory, when the alarm condition
ends the measurement unit icon not selected by CF parameter
will flash. For example if CF=°C, in case of alarm with memory,
the °F led will flash.
HOW TO SEE THE SET POINT
1.
Push and immediately release the SET key, the set point will be
showed;
2.
Push and immediately release the SET key or wait about 5s to
return to normal visualisation.
HOW TO CHANGE THE SETPOINT
1.
Push the SET key for more than 3 seconds to change the Set
point value;
2.
The value of the set point will be displayed and the "°C" or "°F"
led starts blinking;
3.
To change the Set value push the
4.
To memorise the new set point value push the SET key again or
wait 10s.
Note: the set value is stored even when the procedure is exited by
waiting the time-out to expire.
HOW TO CHANGE A PARAMETER VALUE
1.
Enter the Programming mode by pressing the SET +
3s ("°C" or "°F" led starts blinking);
2.
Select the required parameter by pressing
Press the SET key to display its value;
3.
4.
Use
or
to change its value;
5.
Press SET to store the new value and move to the following
parameter.
To exit: Press SET +
or wait 15s without pressing a key.
Note: the set value is stored even when the procedure is exited by
waiting the time-out to expire.
PARAMETER PROGRAMMING LEVELS
The instrument shows 2 parameter programming levels. The
parameters in level L1 (user level) can be seen and modified according
to the procedure described in the previous paragraph The parameters
in level L2 (manufacturer level) can be seen and modified by the
manufacturer or by authorized personnel only.
TO LOCK THE KEYBOARD
Keep pressed for more than 3s the
The "oF" message will be displayed and the keyboard will be locked.
If a key is pressed more than 3s the "oF" message will be displayed.
TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the
"on" message will be displayed.
MEANING
Compressore enabled
Anti short cycle delay enabled
(AC parameter)
Measurement unit
Ended alarm or programming
mode
Measurement unit
Ended alarm or programming
mode
or
arrows within 10s;
keys for
or
;
and
keys.
and
keys till the
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