Troubleshooting and Maintenance 6-5
Troubleshooting
Troubleshooting Guide for 5000 Analyzer
Possible Cause Isolation Procedure Corrective Action
Field Unit LEDs Do Not Light
Blown fuse F1
Blown thermal cutoff S2
Faulty power supply
Faulty connections
Check for 24 V dc between red
and black test points TP2 (+) and
TP1.
Replace F1.
Replace S2.
If voltage is not present and CB1 is
closed, check power supply of T1
and diodes CR4 and CR5.
Controller Alarms Not Operating
Perform Test Alarm Relays routine,
page 5-3
Check and secure all connectors
between boards. Check that all
relays are secure. Verify software
parameters.
If relay works, place analyzer on
line. If relay does not function,
replace the cpu board.
Replace the cpu board.
Display reads low in calibrate or operate modes
Incorrect operating parameters
Faulty relay
Faulty cpu board
Check all values against Calibra-
tion Data Sheet.
Check and, if necessary, reset back
pressure.
Reset flow rate if necessary.
Check and, if necessary, set oven
and moisture generator operating
temperatures.
If cell frequency input is >3500
Hz, replace the cell.
Replace or re-activate dryer.
Incorrect operating parameters
Incorrect back pressure
Incorrect sample flow rate
Incorrect operating temperatures
Contaminated sample cell crystal
Contaminated dryer
Check flow rate with Bubble-O-
Meter.
Read cell frequency.
Substitute with known good
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