LABBOX KJD20, User Manual, Page: 19 / 21

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IX. Common Problems and Troubleshooting
X. Appendix
One-year limited warranty starts from the purchase day (the invoice-issuing date),
and does not cover the following situations:
1. The warranty has expired.
2. Any damage caused by the inappropriate operation.
3. Any damage caused by the disassembly that is not performed by authorized personnel.
4. Any damage caused by the inappropriate transportation or storage.
XI. Attention
1. Check the amount of distilled water before use and refill the bottle if necessary. The manufacturer
does not take any responsibility for any damage caused by the insufficiency of distilled water.
2. When the alkali solution or acid solution is made up, users must be cautious to avoid a burn injury
caused by chemical reagents.
3. It is prohibited to unplug the gas-liquid pipe when the Kjeldahl Distillation Unit is working, if
necessary, please open the bottle to release pressure.
4. Be careful about the glassware during transportation.
5. If the inside parts need repair, make sure the power cord is unplugged and wait for the distillation
system to cool down.
6. The outlet of waste-discharging pipe should be lower than the whole instrument to ensure a good
drainage.
7. Remove the alkali solution from its bottle and fill the water instead if the instrument will not be used
for a long time. Install nitrogen tube back to the instrument and start manual mode of adding alkali
solution to transfer the alkali solution stored in the pipe to the nitrogen tube. Then rinse the pipe with
the clear water to avoid the pipe clogging caused by the crystallization.
No. Problem Cause Troubleshooting
1 No power
The fuse is burned or the power cord is not
plugged in firmly Replace the fuse or correctly plug in the
power cord
2
Water in distilling bottle has
reached required level, but
no steam is generated and
heating indicator is still off
Malfunction in heating controller or something
is wrong with the wire connecting heating
controller and distilling bottle 1. Check whether the wires are loose.
2. Replace the heating controller
3 Unable to add alkali solution
1.The alkali solution is insufficient, the suction
tube is not able to reach the
alkali solution
2. There is no air pressure in alkali solution
bottle; air loop is not air-tight or the cap of
alkali solution bottle is not screwed firmly
into place
3.The air pump does not work
1.Add pre-made alkali solution into
alkali solution bottle
2. Check all connections and make sure
the cap of alkali solution bottle is
firmly screwed into place.
3. Replace the air pump
4
Unable to add
boric acid
As above mentioned As above mentioned