Operation Manual TCH Pro 202 & 203
Chapter 4: Troubleshooting
If you have a problem with your unit, please check the following list for solutions.
Symptom
Possible Causes
Solutions
Unit does not turn on and nothing
happens when plugged into wall.
Battery fully discharged.
1) Leave it plugged until charging light
turns red (start of normal charging cycle).
Note
: to protect a deeply discharged
battery, charging current is limited and
normal charging cycle will not start
immediately.
2) Replace charger.
Pump not running or making
irregular noises.
Large object (>100um) or
water droplets may have
entered the device.
Make sure that operating and storage
ambients are non-condensing and no
large particles are in the proximity of
isokinetic probe.
Screen not responding.
1) Unit is Sampling or on-
hold;
2) Need calibration.
1) Cancel sampling by pressing Count
button.
Note
: Touchscreen is disabled
during sampling, even during hold time.
2) Follow touchscreen calibration
procedure.
Large Temperature and RH offset.
1) Use external sensor (TCH PRO 203
only).
Note
: for APC PRO 202, the
displayed temperature is the flow
temperature. Offset is reduced when the
pump is running (active flow).
Forgotten Admin password.
Press the reset button. Password will be
reset to 1234.
Battery drains too fast.
Replace batteries (2-18650 Lithium-ion).
Particle concentration/count is
high or low.
Run System check to look for possible
system failure.
Reading displays >9,999,999.
Counts/ concentration
exceeds the display range.
Cannot transfer data to computer.
1) Loose/damaged usb
cable;
2) Mass storage setting not
enabled.
1) Replace cables.
2) Follow steps in enabling mass storage.
Red patch/circle blinking.
Coincidence loss above
limit.
Contact Teilch Customer Support.
Temperature/ humidity or pressure
displays “N/A".
Contact Teilch Customer Support.
Symptom
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TCH Pro v1.2.1
