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CFA3000 MANUAL SECTION 5
TROUBLESHOOTING PROCEDURES
Problem Probable Cause Remedy
Alarms not
activated
Incorrect
settings
Readjust
settings, making
sure that low
alarm is set
lower than
high alarm
Insufficient time
for alarm to
respond
Alarm condition
must exist for
minimum of 60
seconds before
alarm activates
Signal not
repetitive
(same sample
not repetitive)
Small leak or
clogging in
fluidics
Check all tubing
lines and
connections
Clogged tubing Replace tubing
No signal, or
signal “offscale”
high
Connector or
wires loose
Faulty circuit
board
Incorrect mV
value
Check circuit
boards for
proper seating
Replace power
supply circuit
board
Loss of mV
Sensitivity
LED ISE on
Reagents,
standards old,
contaminated or
improperly
prepared
Change
reagents
Reagent straws
in wrong
reagent or
standard
Check
placement of
straws
Problem Probable Cause Remedy
Loss of sample
flow
Replace sample
filter on overflow
panel
Decreased
pumping volume
Tubes pinched
shut or clogged
from deposits
Remove
condition
causing
“pinched” lines;
replace sample
filter at overflow
panel
Leak detector
LED lights up
Leak in fluidics Repair leak and
dry leak detector
contacts; turn
main power
OFF for
20 seconds
High humidity Adjust screw on
leak detector
potentiometer
on analog
board; turn
clockwise to
decrease
sensitivity
Connector faulty
or not properly
insertede
Check
connection to
analog board;
replace analog
board.
5.2 Test Functions
Table 52: Test Functions
Problem Probable Cause Remedy
Front panel
display
Test LED’s and
LCD on keypad:
a. Press Power
button and reset
button on the
CPU board (yel
low ejector)
b. Release
power, then
Reset button.
Press power
Press: