mru NOVA compact - Error Diagnosis and Troubleshooting

USER MANUAL NOVAcompact
MRU GmbH, D-74172 Neckarsulm
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11.8. Errors
Error diagnosis regarding the measuring device
1. Effect
2. Error indication
3. Cause
4. Solution
Device cannot be
switched off by
pressing the OFF
key.
Device does not react
on any key.
Press ESC and ON
simultaneously!
RESET
After this, the date and time
have to set new.
Inside of the device
is too cold, device
not ready for
operation.
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
Incorrect zeroing
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
without exact
temperature values.
Temperature
indication:
- - - , - °C
Thermo element
defective, balancing
network interrupted or not
connected.
Call our after-sales service.
Remove probe from the gas
duct and condensate from
the probe tube.
Wrong measuring
values
Measuring range
exceeded:
Value O
2
too high
Values CO and CO
2
to low
Connection probe –
device not correct.
Leakage at probe / tube /
condensate separator,
pump does not suck
correctly
Perform 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 cable
in the probe line,
formation of condensate
at the probe tip.
Check probe plug
respectively probe line
regarding damages (loose
connection), remove
condensate from the probe
tip.