Troubleshooting; Troubleshooting Table - CAIRE FreeStyle Comfort Technical Manual

FreeStyle Comfort

Troubleshooting

Before reviewing the Troubleshooting Chart, the following steps may be useful to isolate any malfunctions:
1. Make sure all filters are clean.
2. To test the oxygen concentration, the unit must be turned on. With the unit turned on, press the
following sequence of buttons "+ + - - + - + -". In order for the unit to recognize the following
sequence, it has to be entered within a 5 second time period. If the sequence of buttons is entered
correctly, the unit will alarm and the screen will change, having a red border around the screen,
indicating the unit is now in test mode.
3. After ten minutes of running in test mode, measure the oxygen concentration. The acceptable O2
range is 90% oxygen +5.5/-3%
4. Make sure the unit is leak-free by testing all tubing connections and fittings with a leak-testing
solution. Protect the circuit board from the solution, and start the leak test at the compressor,
following the air flow of the unit to the oxygen outlet. Repair all leaks by tightening connections
and fittings.
5. To exit test mode, turn off the unit. Be sure to exit test mode before returning the unit to patient use.
Note: The Pulse setting can be increased or decreased as normal operation while in test mode.
The alarm code can stack, e.g., 0x0003 indicates both battery high temperature and case high
temperature. (0x0001 and 0x0002)

Troubleshooting Table

Review the Troubleshooting Chart that follows to isolate and repair a malfunction:
Alarm Run Mode Screen
Code
(Hex)
0x0000
0x0001
0x0002
28
Alarm Code Probable Cause
Description
No Alarm Normal
Operating
Battery Hot Battery
High Defective
Temperature battery
Case High Case
Temperature Temperature
Greater Than
60 °C
Vent Blockage
Other
Suggested Action
None.
Test unit with a battery at
room temperature.
Test unit with another
battery.
Allow unit to cool down.
*Unit will shut off if it
reaches an internal
temperature of 65 °C *
Ensure there are no
blockages on any vents of
the unit.
Contact Caire to send the
unit in for repair.