Carrier 69NT40-541-001, Операция и обслуживание

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T-316 4–2
4.1.1 Key Pad
The key pad ( Figure 4.2 ) is mounted on the right-hand side of the control box. The key pad consists of eleven push
button switches that act as the user's interface with the controller. Descriptions of the switch functions are provided
in
Table 4–1 .
Figure 4.2 Key Pad
CODE
SELECT
PRE
TRIP
ALARM
LIST
MANUAL
DEFROST/
INTERVAL
ENTER
BATTERY
POWER
ALT
MODE
RETURN
SUPPLY
C
F
Table 4–1 Key Pad Function
KEY FUNCTION
Code Select Accesses function codes.
Pre-Trip
Displays the pre-trip selection menu.
Discontinues pre-trip in progress.
Alarm List
Displays alarm list and clears the
alarm queue.
Manual
Defrost/
Defrost
Interval
Displays selected defrost mode. De
pressing and holding the Defrost in-
terval key for five (5) seconds will ini-
tiate defrost using the same logic as
if the optional manual defrost switch
was toggled on.
Enter
Confirms a selection or saves a se-
lection to the controller
Arrow Up
Change or scroll a selection upward
Pre-trip advance or test interruption.
Arrow Down
Change or scroll a selection down
ward. Pre-trip repeat backward
Return/
Supply
Displays non-controlling probe tem-
perature (momentary display).
°C/°F
Displays alternate English/Metric
scale (momentary display). When set
to °F, pressure is displayed in psig
and vacuum in “/hg. “P” appears after
the value to indicate psig and “i” ap-
pears for inches of mercury.
When set to °C. pressure readings
are in bars. “b” appears after the val-
ue to indicate bars.
Battery Power
Initiate battery backup mode to allow
set point and function code selection
if AC power is not connected.
ALT. Mode
This key is pressed to switch the
functions from the temperature soft
ware to the DataCORDER Software.
The remaining keys function the
same as described above except the
readings or changes are made to the
DataCORDER programming.