Invacare 3LX, Service Manual

Page: 58 / 72

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PROCEDURE 17 - SENSO2 ALARM INDICATORS AND SWITCH
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CAUTION
TO PREVENT ELECTRICAL SHOCK, ALWAYS
DISCONNECT CONCENTRATOR FROM ELEC-
TRICAL OUTLET BEFORE SERVICING.
Operation
The Invacare 5 and 6 with SensO2 is equipped with
an oxygen purity indicator. This feature monitors
the purity level of the oxygen generated by the
concentrator. If purity falls below alarm thresholds,
indicator lights on the control panel will illuminate.
Purity Indicator Switch
- If Installed (FIGURE 2)
1. Unplug unit.
2. Remove cabinet. (Refer to PROCEDURE 1 -
REMOVING CABINET).
3. Locate purity switch on upper left corner of Sensor
Board.
4. Set the indicator switch to either 73% or 85%. (Switch
is factory preset at 73%). (Refer to Alarm Thresh-
olds in the SPECIFICATION section of this
manual).
5. Plug in power cord.
6. Run unit and check the indicator lights for operation
in accordance with specifications set forth in this
PROCEDURE.
7. If problems exist, call Invacare Technical Support.
8. Refer to Operating Sequence in the INSTALLA-
TION AND SEQUENCE OF OPERATION portion
of this manual.
9. If operation is within specification, reinstall cabinet.
(Refer to PROCEDURE 1 - REMOVING CABINET).
NOTE: Concentrator can be used during initial
warm-up time (approx. 30 minutes). When the
unit is initially turned ON, no oxygen purity lights
will illuminate. Within 5 to 30 minutes after
initial startup, a GREEN light will illuminate in
the Oxygen Purity Section of the Control Panel
if the concentration level is in specification. Any
other indicator light illuminating will signal a
condition that requires service. The concentra-
tor may be used while waiting for a light to
illuminate.
Indicator Lights (FIGURE 1)
GREEN LIGHT - Normal Operation.
YELLOW LIGHT - You may continue to use the
concentrator unless instructed otherwise by your
supplier. Call Supplier IMMEDIATELY. Be certain
that BACKUP OXYGEN is nearby.
RED LIGHT - Total unit shutdown. Switch
IMMEDIATELY to BACKUP OXYGEN supply. Call
Supplier IMMEDIATELY.
GREEN LIGHT - with YELLOW LIGHT FLASHING
- Oxygen sensor malfunctioning; you may continue
to use the concentrator. Call Supplier IMMEDI-
ATELY.
NOTE: If your Invacare Concentrator SensO
2
P.C.
board is equipped with an alarm threshold
switch then you can set the level at which the
purity indicators will activate. The switch is
located on the sensor board near the top of the
unit. (See PURITY INDICATOR SWITCH graphic)
(FIGURE 2).
Refer to - Alarm Thresholds in the SPECIFICA-
TION section of this manual.
NOTE: Indicator lights are visible only when lit.
PROCEDURE 17 PURITY SWITCH
TOP-LEFT
Purity Switch Settings
Sensor Board
FIGURE 2 - PURITY INDICATOR SWITCH
Auto Shut - Down
Use Backup
Call
Supplier
Normal
Below Normal
Oxygen Purity
RED
YELLOW
GREEN
FIGURE 1 - INDICATOR LIGHTS
73% 85%