Cause Of Fault - Lamtec LT1 Quick Reference For End User

8 Faults/Warnings
8.3.3

Cause of Fault

Fault/warning message
information
Probe defective
Internal resistance of the zirconium
dioxide measuring cell too high
Flow rate too low
Fault:
Probe current at air less than
200 mA
Warning:
Probe current at air less 260 mA
Partial vacuum measuring gas
pump
Unauthorised release of pump pres-
sure switch
Probe heating system defective
Probe wire breakage
Excessive drawing of current in
pump (measuring/calibrating gas
pump)
Possible cause
Measuring cell worn out or broken
GED blocked
Measuring gas hose blocked or it
has a kink in it
Nozzle blocked
Fuse F 203
Pump circuit interrupted
DC motor (12 V) defective
Leak in measuring gas hose, in the
couplings or in the pump head
Measuring gas return path blocked
Diaphragms broken or pump head
dirty
Pump protection filter / condensate
tank leaking
Pump pressure switch (microswitch
on pump head) defective or operat-
ing point misadjusted
LS1 Lambda Probe has been dis-
connected
Fuse F 206 and F 207
Probe heater defective
Fault in electronics
CO peak > 10.000 ppm
Probe not connected
Fuses F 208 defective
Broken wire in probe feeder or
probe connector
Probe defective
Bearing damage to measuring gas
pump
Bearing damage to calibrating gas
pump
59
Troubleshooting
Send probe to be repaired
Replace GED
Replace hose
Replace nozzle
Check fuse
Check male cable connector
Replace measuring gas pump
Check hose and connections, check
pump for leaks
Clean measuring gas return pipe at
PIF
Clean pump head and change gas-
kets / diaphragms
Check and replace if necessary
Replace measuring gas pump
Connect probe
Check fuses
Check probe heater
If defective, replace probe
Change LT1
Connect probe
Check fuses
Check probe heater
If defective, replace probe
Send probe to be repaired
Replace measuring gas pump
Replace calibrating gas pump