26
The data inside this manual are not binding and they can be modified by the manufacturer without notice.
All rights reserved.
NPC 280 - 400
7.11.2 Unit start up an d stop from digital in put
From digital input configured as remote ON/OFF, that is able to commute the unit operation on/off.
The digital input overrides the keyboard command, you can use the keyboard to start up and turn off the unit only if the digital input is not active.
When you disconnect the digital input, the control goes back to the status before its activation.
7 . 1 2 F u n c t i o n m e n u , b u t t o n “
I
”
Enter the function menu
Press and release
I
(menu).
Exit the function menu
Press and release
I
or wait the time out.
Entering the function menu allows to:
1.
Display and reset the present alarms
ALrM
function
2.
Reset the compressor overload alarms
COtr
function
3.
Display and clear the alarm historic
ALOG
function
4.
Upload the parameters from the control to the key
UPL
function
5.
Enable or disable the operation of one circuit from keyboard
CrEn
function
6.
Enable or disable the operation of one compressor from keyboard
COEn
function
7.
Display the temperature of compressor outlet
COdt
function
(when the compressor outlet temperature probe is present)
8.
Display and reset the hours of operation of controlled loads
Hour
function
9.
Display and reset the starting number of each compressor
COSn
function
10.
Display the operation percentage of the 4 proportional exits 0 ÷ 10 Volt
Pout
function
11.
Display the temperature of the probes that check the auxiliary exits
uS
function (if enabled)
To scroll the list of the functions use
C
or
E
button.
7.12.1 How to view and reset the status of an alarm
ATTENTION
This procedure can reset all the alarms except for the compressor thermal alarm COtr.
Resetting a compressor thermal alarm is explained in the next paragraph.
1.
Enter the functions menu
2.
Pressing
C
or
E
select the
ALrM
function
3.
Press
G
.
If any alarm is on, the pressure of
G
is not enabled.
4.
The bottom display shows the label with the alarm code, while the top display shows the label
rSt
(if the alarm can be reset) or the
label
NO
(if the alarm can not be reset).
5.
Scroll all alarms using
C
or
E
.
6.
Pressing
G
on the label
rSt
the alarm can be reset. With the same procedure all resettable alarm can be reset. Pressing
G
on a
not resettable alarm (label
NO
) it does not happen anything; to view the next alarm press
C
or
E
.
7.
To exit the function
ALrM
and go back to the normal visualization, press
I
or wait for the time-out.