34
Symptom
Check
Action
Refer-
ence
page
Sensor unstable
This message indicates that the
measurement took longer than
usual (90 to 120 seconds or
more). The following causes can
be considered.
• When the ambient temperature
changes drastically.
• The needle, filter, or tube is
loose or damaged.
• When the oxygen sensor
membrane is damaged.
• The CO
2
sensor has reached its
service life or is faulty.
Is the connection of the needle, membrane
filter, check valve, or sampling tube loose?
Securely tighten the connection for the needle,
membrane filter, check valve, or sampling tube.
26,27
Is the needle, membrane filter, check valve, or
sampling tube clogged?
Check for clogging. If clogged, unclog the part or
replace it with a new part.
If the symptoms do not improve, make a request for
repairs.
16
26,27
37
Is the needle, membrane filter, check valve, or
sampling tube damaged?
Replace the damaged part with a new part.
26,27
Is the oxygen sensor correctly mounted?
- - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - -
Is the O-ring for the housing deviated?
Alignthe▲markontheprobe(blue)withthe▲mark
on the housing (red).
- - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - -
Firmly mount the O-ring for the housing in the groove.
26
Has water or foreign matter gotten between
the oxygen sensor and housing?
Remove the oxygen sensor and clean the inside of the
housing. Lightly wipe the metal mesh at the center of
the oxygen sensor surface with tissue paper, etc., to
remove any moisture or foreign matter. Replace the
needle, membrane filter, check valve, and sampling
tube with new parts.
26
27
Are there any factors that could cause the
measurement environment temperature
to change drastically? (Close to the air
conditioning blow-off port, heating appliance,
etc.)
Take the measurement in a room with little temperature
change, where it is not affected by air conditioning.
If the symptoms are not resolved even after
taking the above actions and confirming the
calibration conditions, the oxygen sensor
membrane may be damaged.
Replace the oxygen sensor with a new part.
(Contact the dealer from which you purchased the
product if the warranty is still valid.)
26
37
If the symptoms do not improve even after
taking the above actions, the CO
2
sensor may
have reached its service life or may be faulty.
The CO
2
sensor can be replaced only by Iijima
Electronics Corporation. Contact the dealer from
which you purchased the product for replacement and
repairs.
37
Printer error
Is the printer or personal computer connected
correctly?
Correctly connect the printer.
25
Are the communication settings with the
printer or personal computer correct?
Reset the communication settings. (Refer to the
Operation manual enclosed with the PACK LEADER or
printer.)
25
Negative pressure
detected
This message indicates that
a negative pressure lower
than -40kPa was detected.
Is the check valve mounted in the correct
direction?
Re-mount in the correct direction so that the narrow
side of the check valve faces the sampling tube.
27
Is the needle, membrane filter, check valve, or
sampling tube clogged?
Check for clogging. If clogged, unclog the part or
replace it with a new part.
If the symptoms do not improve, make a request for
repairs.
16
26,27
37
Has water or foreign matter gotten between
the oxygen sensor and housing?
Remove the oxygen sensor and clean the inside of the
housing. Lightly wipe the metal mesh at the center of
the oxygen sensor surface with tissue paper, etc., to
remove any moisture or foreign matter. Replace the
needle, membrane filter, check valve, and sampling
tube with new parts.
If the symptoms do not improve, replace the oxygen
sensor with a new part.
(Contact the dealer from which you purchased the
product if the warranty is still valid.)
26
27
37
If the symptoms are not resolved even after
taking the above actions and confirming the
calibration conditions, there may be a clog
inside the main unit.
Make a request for repairs.
37
