Chapter Three – Troubleshooting Guides
49
3.10 NURSE CALL TROUBLESHOOTING GUIDE
NOTE
Before proceeding, check Docker cable visually for proper connection and/or external damage. Ensure Dock-
er cable is compatible with Nurse Call system being utilized. Check +5 VDC called out at various points in
the troubleshooting by using digital ground as a reference point (negative side of C18 on CPU litter board).
Digital ground reference may also be used at headwall IFC board connector P1, pin 7. Prior to replacing any
boards, ensure applicable cables and connections are intact (visually and mechanically).
Depress each Nurse Call switch one at a time to find possible problem. Reset Nurse Call after pressing each
switch. Observe whether any yellow LED’s and switches are not functioning. Try to isolate problem to individ-
ual siderail and to individual switch module on the siderail. If bed is equipped with optional pendant, remove
pendant from bed. If problems are isolated to the pendant, replace the pendant.
With power removed from the bed, press each nurse call switch and verify nurse call is operating properly.
If nurse call does not activate when any nurse call switch is pressed, and speakers in siderail appear not to
work, check 9 VDC battery. Replace battery (p/n 3000–303–851), if necessary. If battery is O.K. and nurse
call only operates when power is applied to bed, replace headwall IFC board (p/n 3000–300–303).
PROBLEM/SYMPTOM SOLUTION(S)
Nurse Call light (yellow LED) does not light when
switch is activated.
A. Check for +5 VDC at the following locations:
1.) Left inside nurse call board (p/n 3000–403–
921), connector J1, pin 1.
2.) Right inside nurse call board (p/n 3000–403–
905), connector J1, pin 1.
3.) Left outside nurse call board (p/n 3000–403–
927), connector J1, pin 1.
4.) Right outer nurse call board (p/n 3000–403–
911), connector J1, pin 1.
If LED does not light and +5 VDC is present, then
replace that board. Yellow LED’s should light
whenever any Nurse Call switch is pressed.
B. Check inside siderail Gatch/Fowler boards (p/n
3000–400–917, left inside & 3000–400–901, right
inside) for +5 VDC at connector P1, pin 10 for both
boards (see page 200 & 201 for board locations).
If voltage is present, replace board assembly.
Note: if a Gatch/Fowler siderail board is defective,
all non–motion functions will cease to work in the
entire siderail.
C. If both siderail LED’s do not light, check litter
CPU board (p/n 3000–300–941) for +5 VAC at
connectors:
1.) P10, right siderail, pin 10 (pin 5, +8 VDC, pin 7,
digital ground)
2.) P11, left siderail, pin 10 (pin 5, +8 VDC, pin 7,
digital ground). (See page 199 for board location).
If voltage is not present, check fuse F1. If fuse is
O.K., and voltage is not present, replace litter CPU
board (see page 115).
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