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Section 13
Troubleshooting
Problem
Short cartridge pack life (continued)
The display periodically reads, "Check UV
Bulb."
Purity display continuously "OVERRANGE."
Display reads, "Overpressure Error."
Display reads, "Meter Board Problem."
13-2
Nanopure Life Science (UV/UF)
Possible Causes
Poor quality feed water.
UV lamp not connected properly.
UV lamp burned out.
Air in system.
Bad cell connection.
Incorrect N.I.S.T. calibration offset.
0.2 micron filter clogged.
PC board communication error.
System electronics failure.
Solutions
If an ROpure is the feed water source, check
that the membrane is functioning properly.
If a Still is the feed water source, ensure that
the distillate temperature to the Nanopure
does not exceed 40°C (104°F).
If feed water is from a central water purifica-
tion system, verify water quality and proper
functioning of the system. See "General
Specifications."
Check to ensure lamp is connected properly.
Replace the UV lamp as described in "UV
Lamp Replacement."
Dispense more water through the Nanopure to
purge air from the unit.
Check the connection of the cell as it attaches
to the meter circuit board mounted on the
inside of the right door.
If you have a N.I.S.T. module, perform a N.I.S.T.
calibration.
If you do not have a N.I.S.T. module, perform
the calibration function WITHOUT the calibra-
tion module (as if you had it; answer (YES) to
prompt. The display will read "Calibration
(failed)" but this will clear any incorrect offset
to zero.
Replace final filter as indicated in "0.2 Micron
Filter Replacement."
Turn the Nanopure OFF (I/O Switch) and
restart the unit.
Replace the resistivity meter board mounted
on the inside of the right door.
Thermo Scientific
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