Replace the pump fuse
To replace the fuse, refer to
Figure 7 Pump fuse replacement
Troubleshooting
Problem
Possible cause
Solution
The flow moves
backwards.
There is a blockage
on the manifold.
Refer to
Air bubbles come out
of the heater block,
but no air gets in the
heater block.
Dissolved gases
come out of the
solution
• Prepare reagents a day in advance and keep the reagents at
room temperature.
• Degas all reagents with helium (unless otherwise noted)
• Use a longer backpressure loop. Increase in 50 cm
increments.
A white precipitate is
formed inside the
manifold tubing when
TKN is flushed.
Order of the reagent
tubing removal
Remove the sodium hydroxide and buffer tubing only after
salicylate reagent is no longer present on the manifold.
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