Chapter 5
Repair
REF 580-1000-02 G
Esprit® Ventilator Service Manual © Respironics, Inc.
5-29
10. Return the hardware screen to its initialized state.
Oxygen Pressure Switch
1. Connect a wall or bottled oxygen source to the ventilator. The
Oxygen
Supply
display on the hardware screen should read
ON
.
2. Disconnect the oxygen source from the ventilator.
3. Touch
Oxygen
and set the flow to 100 LPM, and then back to 0 LPM
to relieve any trapped oxygen pressure.
4. The
Oxygen Supply
display should read
OFF
.
5. Return the hardware screen to its initialized state.
External Oxygen Sensor
Perform the performance verification oxygen accuracy test (section 8).
Sensor PCB Voltage
Indicators
The sensor PCB includes LEDs (Figure 5-16) that indicate under- and over-
voltage conditions, as summarized in Table 5-1. When the sensor PCB is
installed, the LEDs are near the power supply shroud.
Sensor PCB
LED
Voltage Condition
Recommended Repair
D3
Power Supply: -12 V under
Replace Power Supply
D4
Power Supply: +12 V under
Replace Power Supply
D5
Power Supply: +24 V under
Replace Power Supply
D6
Sensor PCB: +5 V under
Replace Sensor PCB
D7
Sensor PCB: +5 V over
Replace Sensor PCB
D8
MMI PCB: +5 V under
Replace MMI PCB
D9
MMI PCB: +5 V over
Replace MMI PCB
D10
Power Supply: +10 V under
Replace Power Supply
D11
Power Supply: +10 V over
Replace Power Supply
D12
Main PCB: +5 V over
Replace Main PCB
D13
Main PCB: +5 V under
Replace Main PCB
D49
Power Fail
Replace Power Supply
