31
Symptom
Check
Action
Refer-
ence
page
The O
2
and CO
2
measurement val-
ues fluctuate.
The measurement
takes time.
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
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.
(Only for O
2
) Is the oxygen sensor correctly mounted?
- - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - -
(Only for O
2
) Is the O-ring for the housing deviated?
Alignthe▲markontheprobe(blue)withthe▲markonthehousing
(red).
- - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - -
Firmly mount the O-ring for the housing in the groove.
26
(Only for O
2
) 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
(Only for O
2
) Is the oxygen sensor wet, or have crystals
formed on the surface?
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 main unit may be faulty.
Make a request for repairs.
37
The O
2
measure-
ment value flashes.
The zero calibration may be faulty.
Initialize the unit or conduct zero calibration.
18
7
Is the oxygen concentration in the atmosphere 20% O
2
or
less, or 22% O
2
or more?
Calibrate the span.
6
If the symptoms do not improve even after taking the above
actions, the main unit may be faulty.
Make a request for repairs.
37
The CO
2
measure-
ment value flashes.
The display flashes if
100% CO
2
is exceed-
ed.
CO
2
calibration may not have been conducted properly.
Initialize the unit or conduct CO
2
calibration again with the CO
2
standard
gas on hand.
18
23
If the symptoms do not improve even after taking the above
action, 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
The O
2
measure-
ment value is
negative.
The zero calibration may be faulty.
Initialize the unit or conduct zero calibration.
18
7
The CO
2
measure-
ment value is “--
--” even after the
START key is
pressed.
The CO
2
sensor may have reached its service life or may be
faulty.
Press
and turn the power OFF once, and then
press
again to turn the power ON.
If the symptoms do not improve, make a request for repairs.
3
37
The printer does
not print.
Is the printer correctly connected?
Correctly connect the printer.
25
Is “PRINTER” selected on the “OUT SET” screen under the
“SETTING” menu?
Make sure the output setting destination is “PRINTER”.
15
If the symptoms do not improve even after taking the above
actions, the main unit or printer may be faulty.
Make a request for repairs.
37
Reference: Refer to the Iijima Electronics Corporation website for information on troubleshooting, handling, and maintenance.
https://www.iijima-e.co.jp/
Contact the dealer from which you purchased the product if you have any questions or inquiries regarding handling.
