Low Pressure Test; Time-Out Test - Invacare Perfecto2 IRC5PO2AW Service Manual

8.3 Low Pressure Test

AW Compressor
If any alarm fails to perform to specification, contact Invacare Technical Service.
1. There are two separate failure modes for Low Pressure:
•
Low product tank pressure. (Pressure in tank drops below a preset value, typically 7 psi).
•
Failure to reach the set point pressure within a prescribed time limit, or Timeout Failure.
Low Product Tank Pressure Test
1. Turn power Off (O) and unplug the unit.
2. Remove cabinet. Refer to 6.1 Removing Cabinet, page 17.
3. Plug in unit.
4. Turn the concentrator On (I).
5. With unit running, set flow at maximum rating.
When the main valve switches, pull the stem on the compressor relief valve A out as far as it will go and hold it.
6.
7. The low pressure alarm should activate within 30 seconds. The front red panel light will illuminate with a continuous audible alarm.
Set Point Pressure Test
1. Turn power Off (O) and unplug the unit.
2. Remove cabinet. Refer to 6.1 Removing Cabinet, page 17.
3. Plug in unit.
4. Turn the concentrator On (I).
5. With unit running, set flow at maximum rating.
6. Remove the pressure sensor tubing (tie-wrap) from the top of the product tank (not shown).
7. The low pressure alarm should activate within 30 seconds and release stem once the sound is heard. Refer to Senso
in 8.6 Oxygen Sensor, page 44 for shutdown mode.
8. Replace tubing and tie wrap.

8.4 Time-Out Test

For this procedure, refer to the images in 8.3 Low Pressure Test, page 43
1. Turn power Off (O) and unplug the unit
2. Remove cabinet. Refer to 6.1 Removing Cabinet, page 17.
3. Disconnect the compressor connector from the main wiring harness.
4. Plug unit in and turn power On (I ).
5. The Time-Out Failure alarm should activate within 40 seconds. The front red panel light will illuminate with a continuous audible alarm.
6. Reconnect the compressor connector to the main wiring harness.
1154245-F-02
VAW Compressor
Alarm Threshold Table
2
Testing
43