184 | Chapter 7: Troubleshooting
Problem
Possible Cause
What To Do
Clogged aspiration
tubes on the
washer manifold.
Remove and clean the washer manifold on page 131
Make sure the microplate carrier is level and the waste
valve is not touching the bench.
Aspirate height
adjustment too
high or too low.
Change the aspiration height (Z-axis position) in the
protocol.
Vacuum pump
failure.
Contact BioTek TAC.
Uneven
aspiration of
water buffer.
Some wells
left full.
No surfactant in
the buffer, such as
Tween
®
20.
Add surfactant to the buffer. If this is not possible,
continue below.
Insufficient
vacuum.
BioTek offers a high-flow pump for assays using only
water for the wash fluid. Contact BioTek for more
information.
Protocol settings
not optimized.
Optimize protocols to improve evacuation on page 40
Aspiration tubes
not properly
positioned
horizontally in
wells.
If none of the tubes are bent, try adjusting the
horizontal aspirate position (X-/Y-axis) in the protocol.
Microplate not
level in carrier, or
strips not level in
holder.
Reseat microplate in carrier or strips in holder.
Make sure the carrier is clean.
Try a different microplate or strip holder.
If the problem is unresolved, the carrier may have to
be realigned. Contact BioTek TAC.
Too much
residual left
in wells after
aspiration.
Clogged vacuum
filter.
If you are using an in-line vacuum filter (PN 49943),
the filter may need to be cleaned or replaced.
Waste bottle cover
not properly
sealed or fittings
not properly
connected.
Firmly seat the waste bottle stopper. Make sure tubing
is connected properly.
Manifold out of
alignment or not
moving freely.
Check for obstructions. If none are found, contact
BioTek TAC.
405™ Microplate Washer LS
Summary of Contents for 405 LS
Page 1: ...Operator s Manual Microplate Washer 405 LS ...
Page 2: ......
Page 56: ...36 Chapter 2 Installation 405 Microplate Washer LS ...
Page 134: ...114 Chapter 3 Operation 405 Microplate Washer LS ...
Page 190: ...170 Chapter 5 Qualification 405 Microplate Washer LS ...
Page 210: ...190 Chapter 7 Troubleshooting 405 Microplate Washer LS ...
Page 238: ......