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