Invacare Perfecto2 IRC5PO2AW Service Manual page 50

Invacare® Perfecto₂™ Oxygen Concentrator
Symptom
Unit plugged in, power switch On (1),
continuous audible alarm. Compressor shut
down (Failure to cycle due to low pressure).
Defective Parts:
Internal Status Indicators:
RED: One Flash
GREEN: Five Flashes
Or
RED: Two flashes
GREEN: Three Flashes
Control Panel Indicators:
RED: On
YELLOW: Off
GREEN: Off
Unit plugged in, power switch On (I),
continuous audible alarm.
Compressor shut down.
Unit not operating:
Alarm: On or Off
Internal Status Indicators:
RED: Two Flashes
GREEN: Four Flashes
Or
RED: Two Flashes
GREEN: Five Flashes
50
Probable Cause
Regulator cracked or leaking.
P. E. valve leaking.
Defective main valve coil.
Connector loose.
Defective P. E. valve coil. (Resistance
80 ohms ± 10.)
Defective P. E. valve.
Connector loose.
Defective P. C. board.
P. C. board Failure.
Solution
Replace regulator. Refer to 6.7 Replacing Regulator,
page 27.
Replace P. E. Valve. Check voltage at P. E. valve
connector on 24 volt D.C. scale. The P. E. Valve
activates or energizes approximately one seconds
prior to the activation of the 4 way valve with
approximately 24 volts. If voltage is in excess of 24
volts consistently, replace the P. C. board. Refer to
6.12 Replacing P. C. Board, page 32. If the P. C. board
voltage acts normally, replace the P. E. valve. Refer
to 6.4 Replacing P. E. Valve, page 22.
Check for leaks starting at the compressor
output through all the pneumatic
connections. Major leaks will cause system
pressures to remain below adequate
shift (exhaust) pressures and will cause
compressor shutdown.
1. Replace main valve.
2. Replace main valve coil.
Reattach connector.
Replace P. E. coil if shorted or open on resistance
check. Refer to 6.4 Replacing P. E. Valve, page 22.
Replace P. E. valve. Refer to 6.4 Replacing P. E. Valve,
page 22.
Reattach connector.
Replace P. C. board. Refer to 6.12 Replacing P. C.
Board, page 32.
Replace P. C. board. Refer to 6.12 Replacing P. C.
Board, page 32.
1154245-F-02