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6. The screen shown below is displayed upon successful zeroing. Select Done to exit the calibration
screen.
6.3.6.3 Common Failures and Recommended Actions
Failure
Description
Possible Cause Recommended Action
Display E A zero point error occurs in the PEEP
sensor.
1. Calibrate the sensor.
2. Replace the VCM.
Display F The pressure change is nonlinear.
The larger the expiratory valve
sealing current, the smaller the
pressure.
1. Check for leakage.
2. Replace the drive gas assembly.
Display 10 The expiratory valve is nonlinear.
The larger the expiratory valve
sealing current, the smaller the
sampling current.
Replace the drive gas assembly.
The drive gas pressure is low. 1. Replace or connect a gas supply to
keep the gas supply pressure within
280–600 kPa (40 psi–87 psi).
2. If the gas supply is normal, check the
gas supply pressure switch.
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