Technical information

Portable Chillers UGH024/1103
The Version of the software is depicted by the c “xx” parame-
ter. This “read only” parameter and depicts the version of the
software that has been downloaded into the controller. This
number will be a paramount importance in obtaining service
support. EX CØ1 is version 01 of the chiller program.
Alarm Stage
When the controller senses an alarm, the specific alarm flash-
es alternating with the actual process variable on the display.
These alarms must be cleared when a safe condition exists. In
addition when a power up condition exists the display will
flash RST to alert the operation that the controller must be
reset before operation can continue/begin.
The final area that informs the user is the alarm stage. All
alarms are indicated by flashing “on” LED.
There are three types of alarms that are resident in the con-
troller.
First type of Alarm
First is the annunciating cycling type. This alarm will flash its
code opposite to the process variable but does not shut the
compressor down. These alarms are:
DtA: The deviation from setpoint alarm energizes when the
displayed temperature is above or below the setpoint by more
than the deviation temperature setting (dT) and for longer than
the deviation temperature ignore time(dtt).
TAH: This is a warning alarm only and will flash when the
process temperature gets above this alarm setting (htA).
Second type of Alarm
Second type annunciating type will cycle three times in one
hour before latching and requiring reset. The low refrigerant
pressure alarm PAL is this type of alarm. The bell and strobe
will energize while the system is in low pressure but turn off
when the pressure switch is satisfied.
4-14 OPERATION
TIC CONTROL
READING THE
SOFTWARE VER-
SION (co1)
TIC ALARMS
Continued