Chapter Three – Troubleshooting Guides
50
3.10 NURSE CALL TROUBLESHOOTING GUIDE (CONTINUED)
PROBLEM/SYMPTOM SOLUTION(S)
Yellow LED lights but nurse call does not activate. A. Check headwall IFC (p/n 3000–303–933) (see
page 199 for board location). Verify relay 7 on
board is working (disconnect Docker cable from
bed). Place an ohmmeter across pins 13 and 25
of DB37 pin connector and actuate relay (press
nurse call switch in siderail). Check for +12 VDC at
connector P6, pin 1 on board. Check for +5 VDC
at connector P5, pin 11 on board. If voltage is not
present, replace headwall IFC board.
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).
Ensure Nurse Call (vendor) system supports a Nurse Call response light. With Docker cable disconnected
from bed, apply DC voltage in the range of 5–30 VDC to pins 16 (+) and 28 (ground reference) of DB37 head-
wall cable jack. The signal will simulate a Nurse Call answer signal from the nurse call system being utilized.
Observe whether both of the red LED’s light. Isolate the problem to an individual siderail and then to an individ-
ual board module. If bed is equipped with optional pendant, remove pendant from bed. If problems are iso-
lated to the pendant, replace the pendant.
With power removed from the bed, verify nurse can communicate through speakers in siderails. If nurse can-
not communicate, through speakers in siderail, check 9 VDC battery. Replace battery, if necessary (p/n
3000–303–851). If battery is O.K. and nurse call only operates when power is applied to the bed, replace
headwall IFC board (p/n 3000–303–933).
PROBLEM/SYMPTOM SOLUTION(S)
Nurse Answer light (red LED) does not light when
nurse responds to nurse call.
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.
If red LED does not light when nurse acknowl-
edges call and +5 VDC is present, then replace
that board. Red LED’s in siderails should light at
the same time.
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 and red LED does not light,
replace board assembly. Note: if a Gatch/Fowler
siderail board is defective, all non–motion func-
tions will cease to work in the entire siderail.
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