6. Troubleshooting
WARNING:
There are no user serviceable components inside this instrument. The
covers on this instrument should not be removed or opened for servicing, calibration or
any other purpose except by a factory-authorized person. To do so may result in
exposure to invisible laser radiation that can cause blindness.
A factory-authorized person should do replacement of the sensor, vacuum pump, filter
or any component inside the GT-321.
Symptom
Possible Cause
Correction
Does not turn on, no
display
1. Low battery
2. Defective Battery
1. Charge battery 10 hrs
2. Send to service center
Display turns on but
pump does not
1. Low Battery
2. Defective pump
1. Charge battery 10 hrs
2. Send to service center
Keypad functions do not
Work
Loose connector or
defective component
inside
Send to service center
Sample result remains
at zero after sampling
1. Pump stopped
2. Laser diode bad
1. Send to service center
2. Send to service center
Sample result is lower
than normal
1. Flow rate is low
2. Something may be
stuck in the inlet
nozzle and blocking
the beam
3. Contaminated optics
in sensor
1. Check flow rate
2. Blow into nozzle with a
can of ‘Aero Duster’. Do
not put any object down
into the nozzle
3. Send to service center
Sample result is higher
than normal
1. Air leak in sensor
2. Noisy laser
1. Send to service center
2. Send to service center
Battery pack does not
hold a charge
1. Defective or worn out
battery pack
2. Defective power
cords
3. Defective charger
module or chords
1. Send to service center
2. Check with an Ohm-
meter
3. Contact your distributor
to get another charger
GT-321-9800 Rev D.doc
GT-321 Operation Manual
Page 15 of 18
AC Tool Supply
877-207-1244
www.aikencolon.com
