Pressure Relief Valve (Test 9, Step 1 - Respironics ESPRIT Service Manual

Pressure Relief Valve
(Test 9, Step 1)
REF 580-1000-02 G
This step closes the exhalation valve (EV) and establishes oxygen flow to verify
that the pressure relief valve (PRV) functions properly.
Diagnostic code 3120 indicates that the PRV cracking pressure is too high
(>170 cmH O). Diagnostic code 3121 indicates that the PRV cracking
2
pressure is unstable (>20 cmH
Diagnostic code 3122 indicates that the PRV cracking pressure is out of range
(>160 cmH O or <120 cmH
2
Esprit® Ventilator Service Manual © Respironics, Inc.
O difference between three readings).
2
O).
2
Appendix A
Red = air flow
Blue = O flow
2
Black = no flow
A-17