Carrier 69NT40-489-100 Series, Operation And Service Manual

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101
T-305
TABLE 21 CA KEY PAD FUNCTION
KEY FUNCTION
Alarm List
Displays alarm list and clears the
alarm queue (when followed by
Enter
key) for the CA Controller.
Arrow Up
Change set point upward. Change
codes upward. Scan alarm list
upward. Change user selectable
features upward. Pre-trip advance
forward. Pre-trip test interruption.
Arrow Down
Change set point downward.
Change codes downward. Scan
alarm list downward. Change user
selectable features downward.
Pre-trip repeat backward.
Battery Power
Initiate battery backup mode to allow
set point and function code selection
if no AC power is present.
Code Select
Access function codes (see arrow
up and arrow down) for the CA
Controller.
Display
Freeze
Freezes the display for one minute
when followed by
Enter
key.
Enter
Entering a set point change.
Extending to 30 seconds the time a
chosen function code is displayed.
Executing a code select mode.
Entering the value of a user
selectable mode. Clearing the alarm
list and initiating pre-trip.
Nitrogen
Check
Alternates a choice of “ntest” or
“rslts”. When followed by the
Enter
key, “ntest” performs a 2 minute
check of membrane performance
and “rslts” displays the results of the
last N
2
performance test from
Pretrip or “ntest”.
Pre-Trip
Initiate a pre-trip inspection (when
followed by the
Enter
key).
Discontinues pre-trip in progress.
Service List
Displays last function code if the last
function code accessed was
between codes 10 and 30 or shows
function code #10 when depressed
on power-up.
Vent
Initiates the safety procedure for
venting the container of hazardous
gases before unlocking the rear
access doors. See section 10.7.
The display module (see Figure 65) is mounted at a 20
degree downward tilt to aid in visibility when stacked in
close quarters. The display module consists of:
a. Two -- 25mm (1 inch) high, five digit LCD displays
which are easily viewed in direct sunlight and back-
lighted for superior low-light visibility.
b. Seven Indicators :
S
Air Compr -- White Lamp: energized when air
compressor is energized.
S
Standby -- Orange LED: energized when CA
system is in standby.
S
Service -- Orange LED: energized when air
compressor (Cd#16), membrane air filters
(Cd#17) or the oxygen sensor (Cd#14)
require service.
S
In-Range -- Green LED: energized when O
2
set point is in-range (CO
2
set point is in-range
when applicable).
S
Alarm -- Red LED: energized when the
following alarms are active or inactive in the
alarm queue; AL30, AL31, AL32, AL34, AL36,
AL39 and AL48.
S
Oxygen -- Yellow LED: energized when O
2
concentration and set point are displayed, or
during a CA Pre-Trip failure.
S
Carbon Dioxide -- Yellow LED: energized
when CO
2
concentration and set point are
displayed, or during a CA Pre-Trip failure.
AIR COMPR STANDBY SERVICE IN RANGE ALARM OXYGEN CARB DIOX
SETPOINT/Code GAS CONCENTRATION/Data
O
2
CO
2
Figure 65 CA Controller Display Module
NOTE
The default display mode will normally alternate
for approximately five seconds between O
2
and
CO
2
set point and concentration values. Other
messages indicating low line voltage or improper
operation of the system are sometimes alter-
nated for a third five-second period along with the
O
2
and CO
2
information.