13-2
Nanopure™ Analytical
Thermo Scientific
Section 13
Troubleshooting
Problem
Possible Causes
Solutions
Poor quality feed water.
If a 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 purification system, verify water quality
and proper functioning of the system. See “General Specifications.”
Purity display continuously
“OVERRANGE.”
Air in system.
Dispense more water through the Nanopure to purge air from the unit.
Bad cell connection.
Check the connection of the cell as it attaches to the meter circuit board
mounted on the inside of the right door.
Incorrect N.I.S.T. calibration
offset.
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 calibration 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.
Display reads, “Overpressure
Error.”
0.2 micron filter clogged.
Replace final filter as indicated in “0.2 Micron Filter Replacement.”
Display reads, “Meter Board
Problem.”
PC board communication error. Turn the Nanopure OFF (I/O Switch) and restart the unit.
System electronics failure.
Replace the resistivity meter board mounted on the inside of the right door.
Water is leaking between the
manifold and the cartridge
pack.
Wing head screws are not
tight enough.
Tighten wing head screws on unit manifold.
New cartridge pack: o-ring
missing from post (each of the
4 posts must contain an o-
ring.)
Disconnect inlet water and depressurize system. Next, disconnect
the manifold and verify/replace missing o-ring. Reinstall cartridge pack as
indicated in “Cartridge Pack Replacement.”
Water is leaking at atmos-
pheric drain connection
Tubing not fully inserted.
Insert tubing into connection until it bottoms out.
