8 Tips and assistance
76
Error message
Possible causes / solution
Particle sensor
module open!
(Pump running).
Leak in the cover of the particulate matter sensor, e.g.
seal ring damaged, dirty or not inserted.
> Check seal ring.
Hose is kinked.
> Check hose.
Cover of the particulate matter sensor is defective.
> Contact
Testo
Service.
Particulate matter
sensor and sensor
cover need to cool
down (this process
may take a few
minutes).
The temperature of the sensor module is too high.
This can occur when switching from wood pellets to
wood chips as fuel within a short period of time.
> Open the cover of the particulate matter sensor to
allow it to cool down faster.
Instrument
temperature outside
specified range.
Operating temperature is outside the specified range.
Instrument temperature is too low or too high
(e.g. due to being stored in the car).
> Allow the instrument to cool down or adapt to the
ambient temperature.
Unstable ambient
temperature, no
valid measurement
possible. Please
restart the system.
See instruction
manual!
Cold/thermal radiation due to draught, cold/hot
instrument base.
> Protect instrument from cold/thermal radiation.
Diluter cover open.
> Close
diluter
cover.
Diluter not closed at the start.
> Check
diluter.
Measurement gas
flow in the
measurement gas
path obstructed!
See instruction
manual
Fresh air filter dirty.
> Change fresh air filter.
Measurement gas tube, pressure tube kinked.
> Check measurement gas tube, pressure tube.
Gas path in the area of the preheating section
obstructed.
> Check gas path. Switch to mains operation.
