LUCAS
®
3 Chest Compression System – Service Manual
3328798-002, ©2017 Physio-Control, Inc.
Page 87 of 91
Function Check
Introduction
LUCAS® 3 is an advanced system consisting of both mechanics and electronics. After each repair or maintenance a
Function Check should be performed to establish all vital functions of the device.
Mechanics Test
With the device turned off perform the following tests:
7. Piston Check
• Pull the Suction Cup down and up to check that the Decompression Spring moves smoothly and without
any unusual noise.
• Pull the Suction Cup down and continue to slowly pull down until the Carry Ball Nut has reached its lower
position, check that it runs smoothly and without unusual noise.
• Attention: If you push to fast you will feel resistance in steps because the Electrical Motor is affected,
instead push slowly in one long stroke.
• Push the Suction Cup back up to its top position, check that it runs smoothly and without unusual noise.
8. Claw Lock Mechanism Check
• Check for play between the Release Ring and the Support Legs:
• Pull the Release Ring gently to unlock the mechanism and open the Claws.
• Move your finger around in the Release Ring; verify that you can detect some play between the Ring and
the Support Leg. You should be able to hear a rattle from the play in the Ring when moving the Release
Ring from side to side. If the Support Ring is tight against the Support Leg with no play, then the check has
failed.
• Check for the ability of the Claw Mechanism to remain locked:
• Press the Claw Lock towards the center point of the Support leg (closed position) with your thumbs.
• When locked, press hard with two thumbs on the two claws as shown in the picture below. If the claw
mechanism unlocks, then the check has failed.
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