Troubleshooting - HACH LANGE QuikChem 8500 2 Serie Wartung Und Fehlerbehebung

Replace the pump fuse
To replace the fuse, refer to
Figure 7 Pump fuse replacement

Troubleshooting

Problem
The flow moves
backwards.
Air bubbles come out
of the heater block,
but no air gets in the
heater block.
A white precipitate is
formed inside the
manifold tubing when
TKN is flushed.
14 English
Figure 7.
Possible cause
There is a blockage Refer to
on the manifold.
Dissolved gases
• Prepare reagents a day in advance and keep the reagents at
come out of the
solution
• Degas all reagents with helium (unless otherwise noted)
• Use a longer backpressure loop. Increase in 50 cm
Order of the reagent Remove the sodium hydroxide and buffer tubing only after
tubing removal salicylate reagent is no longer present on the manifold.
Find the flow blockages
room temperature.
increments.
Solution
on page 18.