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7 - 6 Service Manual Revision 02
Preventive maintenance Servo-i Ventilator System
User Interface
• Check the touch screen readability:
– Transparency
– Surface
– Brightness (backlight). Estimated lifetime (with
acceptable brightness level) for the lamps is
30,000 hours. Using the Field Service System
(FSS), a time meter for the lamps can be shown.
The time meter must be reset after replacement
of the lamps.
• Check if pixels on the touch screen are defective.
Open the Status window. A few defective pixels
can be accepted. Check that defective pixels are
not concentrated to a small area thus reducing the
readability in this area.
FSS is recommended but not required.
• Perform the checks listed below and make sure
that the software responds to these actions. FSS is
recommended but not required.
– Check the touch screen functions. Press buttons
on different parts of the touch screen.
– Check the Main Rotary Dial. Turn and press the
Main Rotary Dial.
– Check the Direct Access Knobs. Turn and press
all Direct Access Knobs.
– Check the membrane buttons. Press all
membrane buttons.
Barometric pressure
• Select Status / General on the User Interface.
Check that the Barometric pressure value shown
on the User Interface corresponds to the actual
Barometric pressure value at the local site. The
value shown on the User Interface may not differ
more than ±5% from the actual barometric
pressure.
• If the value shown on the User Interface differs
more than ±5% from the actual barometric
pressure, the barometer in Servo-i must be
calibrated. FSS is required.
Gas supply pressure transducers
• Connect the gas supplies (Air and O
2
).
• Select Status / General on the User Interface.
• Disconnect the gas supply, one gas at the time.
• Check that the corresponding supply pressure
value in the 'Status'-window drops.
Battery modules
• Check the status of the Battery modules used:
– Check the manufacturing date of the Battery
modules. Manufacturing date (year-week) is
printed on the battery label. The batteries must
be replaced after 3 years.
– Check that the battery housing is not damaged.
– Press the battery power symbol button and
check that the green LEDs are lit. All 4 LEDs
must be lit if the battery is fully charged.
If required, an extended check of the Battery
modules can be performed. This extended check is
described in chapter 'Service procedures'.
Lithium batteries
• Check manufacturing date for the lithium batteries
mounted onto PC 1771 and PC 1772. The batteries
must be replaced after 5 years. Replacement is
described in chapter 'Service procedures'.
Safety inspection
• Make a visual inspection of the Servo-i for external
defects or damages. Replace defective or
damaged parts.
• Check the mains power cable and control cable
and their connections for damage.
• Perform a leakage current test. The leakage current
test is a standard procedure regulated by IEC 60
601-1 or corresponding national standards.
Allowable values and test methods are defined in
the standard. The use of a leakage tester, e. g.
Bender Safety Tester 601/751 or equivalent is
recommended.
• Check that a 'Servo-i Ventilator System – User's
manual' and a 'Servo-i Ventilator System – Brief
instructions' corresponding to the installed System
SW version is present. Also check that operating
manuals for all optional equipment connected to
the Servo-i are present.
Completing the Preventive maintenance
• Perform a 'Pre-use check'. Refer to the
'Servo-i Ventilator System – User's manual'.
• Perform 'Function checks' on the optional
equipments connected to the Servo-i. Refer to the
operating manuals for these optional equipments.
• Note in the Servo-i System SW (select Menu /
Biomed / Service / Report PM) and also in a
Servo-i log book that a Preventive maintenance
has been performed.
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