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Operation and Maintenance Manual 113
Diagnosing General Problems
Table 5 Troubleshooting Detector Issues
Problem Possible Cause Diagnosis Corrective Action
No Response No ozone Little or no difference in
output signal between ozone
ON vs. OFF. Typically the
background signal will be
0.3-0.8 mV higher with the
ozone ON.
Continue below. See No
Ozone in Problem column.
No Ozone Blown fuse Ozone indicator light
remains off when ozone
button is pushed.
Replace ozone fuse.
No Ozone High Voltage Transformer
and/or ozone generator is
inoperative.
No difference in output
signal between ozone ON vs.
OFF even though flow
through the ozone generator
is good (about
25-35 mL/min).
Have ONLY someone with
high voltage experience use
a high voltage probe to
check the input to the ozone
generator across the two
wires. It should be
>6000 volts. If it is not then
replace high voltage
transformer. If it is, replace
ozone generator.
No Ozone Ozone restrictor(s) plugged. Needle on the regulator
inside front panel does not
move downward when
regulator is turned fully
counterclockwise. The
measured flow is low or
non-existent.
Replace plugged
restrictor(s).
No Response Hydrogen and/or air ran out. Measure flow rates. Set correctly.
No Response Broken ceramic tube(s). Pressure on Controller
and/or Detector is too high
or too low.
Change tubes.
No Response Heating element failure. Temperature at Controller
<100 °C.
Replace heating element.
Low Response Improper hydrogen/air flow
rates.
Measure flow rates. Adjust flow rates.
Low Response Detector leaks. Note pressures on
Controller.
Locate and repair leaks,
check integrity of ferrules.