Oxygen Sensor - Invacare Platinum IRC5LXO2AW Service Manual

SECTION 24—ALARM TEST

Oxygen Sensor

Alarm sequence occurs when concentration levels fall below a preset value, typically 73%
± 3% or 85% ± 2%. This failure indicates a catastrophic failure of any component
mechanical or electrical.
Oxygen Sensor Test
1. Turn unit on . Set output flow at 5 L/min. for 5 Liter models and 9 L/min for 9 Liter
( )
models.
2. Monitor the O level.
2
3. With the O level greater than 85% after five minutes, the GREEN panel indicator light
2
will remain illuminated.
4. Slowly adjust flow beyond maximum rated flow until you can achieve a concentration
level greater than 75% but less than 84%. Within 30 minutes the YELLOW panel
indicator light will illuminate and the unit will continue to run.
5. Clamp off the 1/8-inch oxygen sensor tubing between the oxygen sensor and the
product tank regulator.
Use care not to cut oxygen sensor tubing when clamping the oxygen sensor tubing.
6. Within 30 minutes, the Oxygen Sensor Alarm should activate and the RED panel light
indicator will illuminate. The compressor will shut down with the alarm.
®
Platinum Oxygen
5 Liter models manufactured After 8/1/05
and 9 Liter models
Orange Wires
(Only one wire
needs to be
removed)
FIGURE 24.2 High Pressure Test
WARNING
76
Main Valve
Coil
Part No 1118396