K3.1.141e Manual NitroFlow HP_EN.doc
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Trouble Possible
cause Possible
solution
Unit is standby
Wait until pressure in application or
storage vessel drops
Sample flow to O
2
sensor is
incorrect
Check / readjust the sample flow to
the O
2
sensor. Refer to §9.5
O
2
sensor drifted
Calibrate O
2
sensor. Refer to §9.5
O
2
sensor used up
Replace O
2
sensor. Refer to §9.4
Flow control valve (FCV1)
was incorrectly adjusted
Readjust purity to correct value with
FCV1
Permeate outlet blocked or
restricted
Check / open permeate outlet
N2 purity is too
low (= O2
purity too high)
Faulty module set(s)
Check / replace module set(s)
Nitrogen outlet pressure high Reduce outlet pressure (if possible)
Sample flow to O
2
sensor is
incorrect
Check / readjust the sample flow to
the O
2
sensor. Refer to §9.5.
O
2
sensor drifted
Calibrate O
2
sensor. Refer to §9.5
Required O2
concentration
can not be
reached
O
2
sensor used up
Replace O
2
sensor. Refer to §9.4
Switch-off pressure set too
high
Change switch-off pressure
NitroFlow
®
HP
does not
automatically
switch off
Compressed air pressure too
low
Check compressed air supply
Compressed air pressure too
low
Check compressed air delivery to
NitroFlow
®
HP
Compressed air temperature
is too high
Lower the temperature if possible /
check if the cooler of the
compressor functions properly
Leak in piping (external or
internal)
Check for leaks in external and
internal piping
Air filters are polluted
Check / clean / replace air filter(s).
Refer to §9.2
Filter drain is open or looses
air
Increase feed pressure. Close
compressed air supply and turn it
open again.
Nitrogen outlet
pressure is not
attained
Faulty module set(s)
Check / replace module set(s)
Table 8-1: Trouble list