Covidien Puritan Bennett 700 Series, Руководство по обслуживанию

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Service and repair
8-46 10070389 Rev. A Puritan Bennett™ 700 Series Ventilator System Service Manual
8.10.2 Piezo alarm
(See Figure 8-40). Remove the piezo alarm as follows. Install by reversing removal procedure.
1. Open and prop lid (Section 8.5.1).
2. Disconnect ventilator head harness from alarm.
3. Unscrew alarm cap (Figure 8-38). Remove alarm and rubber washer.
NOTE:
When installing the piezo alarm, connect the ventilator head harness wires to the +
and - terminals that are next to each other. The alarm will not emit the desired tone if
the wires are connected improperly.
8.10.3 Pressure solenoid PCB and controller PCB
Caution
To prevent damage to ESD-sensitive components, always follow ESD guidelines when
handling the pressure solenoid and controller PCBs.
• To prevent stress to pressure solenoid PCB, handle PCB by cutout (Figure 8-41) when
removing and installing.
• To avoid damaging the transducers, remove tubes from the transducer ports very
carefully.
.
8.10.3.1 Removing/installing pressure solenoid PCB
(See Figure 8-40). Remove the pressure solenoid PCB as follows. Install by reversing removal
procedure.
1. Open and prop lid (Section 8.5.1).
2. Disconnect all tubes and harnesses from pressure solenoid PCB. To avoid damaging the
transducers, take special care when removing the tubes from the transducer ports.
3. Using 5-mm nutdriver, remove seven nuts and internal lockwashers hex standoffs and
split-ring washers that retain pressure solenoid PCB. Lift off pressure solenoid PCB using
cutout at back of PCB.
NOTE:
When installing a pressure solenoid PCB, do the following:
• Make sure to connect the pressure transducer sensing tubes to the correct ports, as
shown in Figure 8-41.
• Perform an oxygen regulator pressure transducer calibration (Section 4.2.3.2.2).
• Perform an FIO
2
calibration check (Section 4.2.3.2.2).
• IMPORTANT: For ventilators with software revision H or later , always input the
calibration constants of the new pressure solenoid PCB into NVRAM using the
Update prsol nvram function in the service menu (Section 4.2.3.5).
• IMPORTANT: If you perform the Update prsol nvram function, you must then
perform the O
2
pressure calib and FIO
2
sensor calib functions. To ensure correct
function of the pressure solenoid PCB, you must perform the Update prsol nvram
function before the O
2
pressure calib and FIO
2
sensor calib functions.