Labconco Logic+ A2, Technical Manual

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4. If operation is not as described in Step 3, repeat Step 3, positioning yourself to
view the silver, formed tabs on each sash switch. Watch as the counterweight
approaches each switch. Here is the expected behavior:
a. CLOSED and ALMOST CLOSED (if present) switches
– The silver tab
should engage and rotate away from the sash counterweight, with the
click occurring as soon as the point of the V-shaped silver tab reaches the
top of the counterweight. See Figure 12-5 for reference.
b. OPERATING POSITION switches
– The silver tab should engage and
rotate away from the sash counterweight, but the click should occur when
the stainless steel “bump” attached to the counterweight reaches the point
of the V-shaped silver tab.
5. If a switch is not actuating properly, move the sash so that the counterweight is
well below the switch in question. Move the silver tab on the switch with your
finger. If an audible click is heard when moving by hand, using pliers
CAREFULLY bend the silver tab so that it protrudes further into the
counterweight channel. Hold the base of the silver tab with one set of pliers, and
form the tab by pushing it with your finger. Prying on the silver tab without
supporting the base (where it is hinged on the black switch body), may break the
tab off of the switch, in which case the switch is permanently damaged and
needs to be replaced.
6. If the switch is defective, replace it by removing the two machine screws and nuts
holding the sensor in place. Take care to note the orientation of the switch and
wiring before switch removal, so the new switch can be properly re-wired and
reassembled.