2.5 The Knee Down Function Does Not Work
Chapter 2: Troubleshooting Procedures
Page 2 - 40 Century+™ Bed Service Manual (man241)
d. At the test port (P200) (see figure 2-8 on page 2-35), disconnect the
cable that connects to the siderail with the inoperative knee down
function.
e. In the cable (P17 or P18), check the resistance between VCC
(common) (pin 7) and the knee down function (pin 6) (see figure 3-1 on
page 3-3, and figure 3-4 on page 3-5).
f. While holding the VOM probes in place, depress the knee down button.
g. The VOM reads 100Ω or less.
Yes No
↓→Go to step 23.
21. Replace the test port. If this solves the problem, go to “Final Actions” on
page 2-7. Otherwise, go to step 27.
22. Perform the following:
SHOCK HAZARD:
Unplug the bed from its power source. Failure to do so could result in
personal injury or equipment damage.
a. Unplug the bed from its power source.
SHOCK HAZARD:
Disconnect the battery backup. Failure to do so could result in personal
injury or equipment damage.
b. If applicable, disconnect the battery backup (see “Battery Backup Box”
on page 4-8).
c. Open the siderail with the inoperative knee down function (see
“Siderail Nurse Call, Lighting, or Bed Control Switch Assembly” on
page 4-52).
d. Disconnect the cable that connects the test port (P200) (see figure 2-8
on page 2-35) to the siderail with the inoperative knee down function at
the siderail end of the cable.
e. In the cable (P17 or P18), check the resistance between VCC
(common) (pin 7) and the knee down function (pin 6) (see figure 3-4 on
page 3-5).
f. The VOM reads Ω “open” (near infinite).
Yes No
↓→Replace the cable that connects the test port (P200) (see figure
2-8 on page 2-35) to the siderail with the inoperative knee down
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