mru NOVAplus - Troubleshooting Common Analyzer Issues

USER MANUAL NOVAplus
MRU GmbH, D-74172 Neckarsulm 92 / 95
11.9. Troubleshooting
Troubleshooting the analyzer
1. Effect
2. Error indication
3. Cause
4. Solution
Device cannot be
switched off by
pressing the OFF key.
LED behind the conden-
sate separator is on and
the LCD display is dark
Device does not re-
act on any key.
Press ESC and ON simulta-
neously!
EMERGENCY OFF
After this, the date and time
have to set new.
Inside of the device
is too cold, device
not ready for opera-
tion.
Display indication:
“Device too cold” or
audible sound every 5
sec..
e.g. device was stored
in a cold place during
winter.
Put the device to a warm
room and wait
Measuring values are
not correct
Sensors already get in
touch with the gas dur-
ing calibration.
Vent device with fresh air
and re-start!
No measurement
possible
Device cannot be
switched on or does
not react after being
switched on.
Battery discharge
Connect the device to the
line power in order to
charge the battery.
Measurement with-
out exact tempera-
ture values.
Temperature indication:
- - - , - °C
Thermo element defec-
tive, balancing network
interrupted or not con-
nected.
Call our after-sales service.
Remove probe from the gas
duct and condensate from
the probe tube.
Wrong measuring
values
Measuring range ex-
ceeded:
Value O
2
too high
Values CO and CO
2
to
low
Connection probe –
device not correct.
Leakage at probe /
tube / condensate sep-
arator, pump does not
suck correctly
Effect tightness test!
By visual control of probes,
tubes condensate separator,
leaking parts could be
found.
Wrong measuring
values
Gas temperature is too
hot or alternates
Probe is not plugged in
correctly, defective ca-
ble in the probe line,
formation of conden-
sate at the probe tip.
Check probe plug respec-
tively probe line regarding
damages (loose connec-
tion), remove condensate
from the probe tip.