Operating instructions

TM 11574A-OI
2-7
2-2. System Controls
a. Details for operating controls and indicators Large Field Refrigerated System (LFRS) and
associated components are given in Table 2-1 and shown in Figure 2-9 through Figure 2-13.
Table 2-1. Operating Controls and Indicators
Item No. Description Type Component Function
1 Code Select Electrical Accesses function codes.
2 Pre-Trip Electrical Displays the pre-trip selection menu.
Discontinues pre-trip in progress.
3 Alarm List Electrical Displays alarm list and clears the alarm
queue.
4 Manual
Defrost/Interval
Electrical Displays selected defrost mode.
Depressing and holding the Defrost
interval key for five seconds will initiate
defrost using the same logic as if the
optional manual defrost switch was
toggled on.
5 Enter Electrical Confirms a selection or saves a selection
to the controller.
6 Arrow Up Electrical Change or scroll a selection upward. Pre-
trip advance or test interruption.
7 Arrow Down Electrical Change or scroll a selection downward.
Pre-trip repeat backward.
8 Return/Supply Electrical Displays non-controlling probe
temperature (momentary display).
9 Degrees C /
Degrees F
Electrical Displays alternate English/Metric scale
(momentary display). When set to
degrees Fahrenheit, pressure is
displayed in psig and vacuum in “/hg. “P
appears after the value to indicate psig
and “i” appears for inches of mercury.
10 Battery Power Electrical Initiate battery backup mode to allow set
point and function code selection if AC
power is not connected.
11 ALT. Mode Electrical This key is pressed to switch the
functions from the temperature software
to the DataCORDER Software. The
remaining keys function the same as
described above except the readings or
changes are made to the DataCORDER
programming.