User manual

µC
2
SE process chiller +030220416 - rel. 2.2 - 25.01.2013
3 USER INTERFACE
The front panel contains the display and keyboard, made up from 4 keys, which, pressed individually or together, allow to perform all of the controller programming operations.
3.1 Display
The display features 3 digits, with the display of the decimal point between -99.9 and 99.9. Outside of this range of measurement, the value is automatically displayed without the
decimal (even if internally the unit still operates considering the decimal part). In normal operation, the value displayed corresponds to the temperature read by probe B1, that is,
the evaporator water inlet temperature*. During the programming it shows the codes of the parameters and their value.
(*) Viewing of the standard display can be changed via parameter b00.
Icon Colour
Meaning
W
ith LED on
W
ith LED flashing
1, 2 Ambe
r
Compressor 1 and/or 2 on Start up reques
t
3, 4 Ambe
r
Not used Not used
Ambe
r
At least 1 compressor on -
Ambe
r
Condenser pump/fan on Start up reques
t
Ambe
r
Condense
r
fan active -
Ambe
r
Not used Not used
Ambe
r
Heater on -
Red Alarm on -
Ambe
r
Not used Not used
Ambe
r
Chiller mode Chiller mode reques
t
3.2 Keypad
Key Machine state Pressure mode
Loading default values Controller power supply with key pressed
Return to upper level up to exi
t
(with saving in EPROM) Single press
A
ccess to parameters type “Direct”
Selection and display of type“Direct” parameter value
Confirm parameter value variation
Single press
Parameters programming via introduction of password Press for 5 s
(UP)
V
alue increase Single of continuous press
Selection of successive paramete
r
Single of continuous press
Immediate access to values read by the probes (parameters b01, b02,…) Single press
Passage from stand-by to chiller mode and vice versa Press for 5 s
(DOWN)
V
alue decrease
Single or continuous press
Select previous paramete
r
Immediate access to values read by the probes (parameters b01, b02,…) Single press
Alarms manual reset
Immediate timer reset
Press for 5 s
3.3 Example: timer reset
Pressing e simultaneously, in the timer value display phase (e.g. parameter
c10), resets the same at zero and consequently cancels the maintenance request.
13