Troubleshooting
Heated Sample Line
8
4 Troubleshooting
Heated Sample Line Controller not heating the sample lines
There is no easy way to repair/replace a burned-out probe heater or
heated sample line in the field. However, often the source of failure is not
a burned-out heater, but a bad connector. Check the connectors for a
broken or bent pin, and repair/replace as necessary. If the connectors
and pins are fine, check to make sure the breaker is not tripped. Reset
the breaker if it has tripped. If resetting the breaker fails, or immediately
trips again, unplug the assembly and look for shorts in the circuit. Do NOT
disassemble the controller; contact Clean Air Express for maintenance.
Overheating
The overheating of this product or the assembly it is contained in is most
often a result of either a thermocouple or temperature controller problem.
If a thermocouple’s insulation is compromised and the bare wires allowed
to come in contact with a surface, it will report the temperature at that
point, rather than at its tip. This can fool at temperature controller into
keeping a heater on continuously. Try using the spare thermocouple
instead. If none of the thermocouples has failed, it means that the
temperature controller itself has failed and needs to be replaced. This
could be due to disengagement of the temperature sensor, a locked
switch, or a bad relay.
