NANOLITER 2020/200704
World Precision Instruments
27
TROUBLESHOOTING
Issue
Possible Cause
Solution
Plunger does not travel
The channel is improperly pro-
grammed.
Test the pump in another channel, with
the same program parameters.
Pump display is
blank
There is a loose connection on a
pump that is plugged in.
Look for a loose connector at the rear of
the
MICRO2T
, make sure the
NANOLI-
TER
Injector Head plug is firmly seated.
The gray plastic plug should fit flush with
the connector on the controller. Verify
that the pins in the connector are not
damaged.
Pump does not
move when commanded
The selected pump is disabled or
absent.
Make sure that the intended syringe is
selected on the
Command
screen by tap-
ping the appropriate pump display area.
The end of travel in the selected
direction will exceed the stops.
Set the direction away from the end of
travel if the syringe is at the stop.
Plunger fails to retract completely
The home position is set
incorrectly.
Reset the End Stop. See “Setting End Stop
in the Nanoliter Injector” on page 16.
Glass pipette pushes off the
pump (Nanoliter Injector head)
The front O-ring seal is worn out. Replace the O-ring seals. Follow the
correct configuration. See “Replacing O-
Rings” on page 24.
The wire plunger is bent enough
to add friction to the glass, which
pushes it off.
Examine the plunger. If it is bent, replace
the wire plunger. See “Replacing the Wire
Plunger” on page 25.
The O-ring seal is soaked in oil
and tightening the collet is not
enough to secure the glass.
Wash the front O-ring in alcohol and
clean it with a Kimwipe or paper towel
before placing it on the glass pipette
shank.
NOTE
: If you have a problem/issue with that falls outside the definitions of this
troubleshooting section, contact the WPI Technical Support team at (941) 371-1003 or
