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7 TROUBLESHOOTING AND MAINTENANCE
Invacare® Solo
2
™ Portable Oxygen Concentrator
34
Part No 1176122
3328
Alarm -
Compressor lock
There are two conditions that can cause this alarm. One happens when the unit is starting up and the rotor does not
move for at least 2 seconds. The other condition happens when the motor has been running, but immediately stops
rotating for at least 750 msec. Check to see that the rotor on the compressor rotates freely. One of the Hall sensors is
not connected or working properly.
3329
Alarm Starting
speed check
If during startup, the compressor does not make the desired speed (based on the present setting) in 6 seconds, this
alarm will occur. Check to see that the rotor on the compressor rotates freely.
3330
Alarm - Power on
but compressor
shutdown
If during shutdown, the power state variable within the software shows the unit should be on, but has somehow
shutdown normally, this alarm will occur. This alarm indicates a possible software programming error. The power state
software variable does not represent the state of the actual unit.
3331
Alarm - Power not
on but compressor
told to start
If during startup the power state variable within the software shows the unit should be off, but has somehow started
normally, this alarm will occur. This alarm indicates a possible software programming error. The power state software
variable does not represent the state of the actual unit.
ERROR
CODE
TRUE MEANING POSSIBLE REASON/SOLUTION