Vaisala CARBOCAP GMW80 Series User Manual page 42

GMW80 Series User Guide
Problem or message
CO reading is too low.
2
Relay is always activated.
Error text on display:
CO2-SENSOR
40
Possible cause
The measured area contains
materials that bind CO
as fresh concrete), producing a
low-CO environment.
2
CO measurement module
2
must be replaced.
Relay setpoint set too low.
GM10 module disconnected.
CO measurement module
2
must be replaced.
CO reading over 6000 ppm.
2
Solution
• Use a portable instrument to
(such verify the CO
2
installation location. Avoid
breathing on the instruments
while checking.
• Check if the transmitter is
installed on a mounting box
that supplies air from inside
the wall into the transmitter.
If yes, seal the opening that
supplies the air.
See Replacing the CO 2
measurement module (GM10)
(page 36).
Adjust the relay setpoint. See
Relay (page
Open the transmitter and check
if the GM10 module is installed
securely. See
(page 10).
• If the module is loose or
entirely disconnected,
reinstall it as instructed in
Replacing the CO 2
measurement module
(GM10) (page
• If the GM10 module appears
to be installed but the
problem persists, disconnect
and reconnect the module
carefully.
Replace the GM10 module with
a verified working module.
• Use a portable instrument to
verify the CO
installation location. Avoid
breathing on the instruments
while checking.
• Check for sources of CO
the measured area, such as
people working right next to
the transmitter.
M211748EN-G
reading at the
2
15).
Figure 2
36).
reading at the
2
in
2