Prism Medical UK transactive tra, Техническое руководство

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Technical manual August 2009
Rev: 01/08/09 Page:
4
Pneumatic Systems
The pneumatically operated functions control on/off, up, down and, where applicable, the side-to-
side traversing motion of the hoist. A methodical check of the pneumatic system starts from the
hand control and works forward through the pneumatic switches on the circuit board.
1. Hand control & Airline
•
Unplug the hand control airline from the hoist and check for blockage of the airlines by
pressing each of the function buttons in turn. Next, check for leaks in the hand control and
airlines by pressing a function button with one thumb, then cover the pins at the end of the
airline with the other thumb, then lift the first thumb off the function button. The button
should remain depressed when the thumb is lifted. Repeat for each button. If the buttons
do not remain depressed, there is an air leak and the hand control unit should be replaced.
2. Air tubes
•
Re-attach the hand control airline to the hoist. (The airline end plug has a cap that has a
raised ridge on one face. The raised cap ridge aligns with and slides over the ridge on the
grommet. Correct insertion can thus be verified by touch and by sight.) Check to see that
the air tubes have been routed free and clear. If not routed properly, air tubes can get
trapped by wires, other hoist components or the hoist cover.
•
Check to see that the air tubes are correctly connected to the circuit board switches. The
two air tubes attached to the main board are color coded to correspond to the colored
stickers on the switches. The two air tubes attached to each of the traversing boards are
connected on the principle of “nearest tube to nearest switch.”
•
Next detach one air tube at a time from the circuit board. Check for leaks in an air tube by
pressing the function key corresponding to that air tube (the function is indicated on the
color coded stickers on the switches), then pinch the open end of the air tube between two
fingers, then release the function button. The button should stay down when the button is
released. Repeat for each air tube.
•
Air tubes are fragile. In detaching and re-attaching air tubes, do not press on the air tubes
with fingernails and be careful not to pierce the tubes with the connector pins.
If an air leak is found the hand control needs to be replaced.
If NO air leak is found then proceed to check the electrical system.