Carrier 69NT40-541-306, Операция и обслуживание

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T-354 4–2
4.1.1 Key Pad
The keypad ( Figure 4.2 ) is mounted on the right-hand side of the control box. The keypad consists of 11 push but-
ton 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 /
Interval
Displays selected defrost mode.
Depressing and holding the Defrost
Interval key for five (5) seconds will
initiate defrost using the same logic as
if the optional manual defrost switch
was toggled on.
Enter Confirms a selection or saves a
selection to the controller.
Arrow Up Change or scroll a selection upward.
Pre-trip advance or test interruption.
Arrow Down Change or scroll a selection
downward. Pre-trip repeat backward.
Return /
Supply
Displays non-controlling probe
temperature (momentary display)
Celsius /
Fahrenheit
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” appears
for inches of mercury.
When set to C, pressure readings are
in bars. “b” appears after the value to
indicate bars.
Battery
Power
Initiate battery backup mode to allow
set point & function code selection if
AC power is not connected.
ALT. Mode 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.