Servo-i Ventilator System Service procedures
Revision 02 Service Manual 5 - 3
5
6
H9
;
SVX9064
Replacing the lithium batteries on
PC 1771 and PC 1772
The lithium batteries must be replaced after 5 years.
A Technical error message will appear on the screen
if the battery voltage level is too low.
Always replace booth batteries at the same time to
keep the same replacement date for both batteries.
Preparations
• Set the On/Off switch on the control unit to Off.
• Disconnect the mains power cable.
• Disconnect the gas supplies (wall and/or cylinder).
• Remove patient tubing.
Replacing the lithium battery
• The lithium batteries are mounted on ESD sensitive
PC boards. Refer to chapter 'Disassembling and
assembling', section 'Handling PC boards' for
further information regarding ESD sensitive
components.
• Remove the Patient Unit front cover. Refer to
chapter 'Disassembling and assembling'.
• Carefully pull out PC 1771 and PC 1772.
Note:
Do not remove the cable connector (1).
Information stored in the PC board memory will be
erased if the connector is removed:
– If the battery on PC 1771 is disconnected;
user default configurations made via the Field
Service System (FSS) and Pre-use check results
including transducer calibrations will be erased.
– If the battery on PC 1772 is disconnected;
all trends, all logs and Pre-use check results
including transducer calibrations will be erased.
• There are two equal battery connectors (2 and 3)
on the PC boards. Connect the new battery to the
un-used connector. The memory functions are now
secured by the new battery.
• Cut the cable ties holding the old battery (4) to the
PC board.
• Disconnect and remove the old battery.
• Mount the new battery onto the PC board using
new cable ties as shown in the illustration.
• Insert the PC board into the correct PC-board slot
and reassemble the Patient Unit.
After any maintenance or service of the Servo-i,
perform a 'Pre-use check'. Refer to the 'Servo-i
Ventilator System – User's manual'.
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