Chapter Three – Troubleshooting Guides
44
3.6 HEAD SECTION (FOWLER) RAISE/LOWER TROUBLESHOOTING GUIDE
(CONTINUED)
PROBLEM/SYMPTOM SOLUTION(S)
Head section does not raise electrically.
Head section does not lower electrically.
(continued)
E. Check Fowler up/down motor for operation. If
motor is not operating, check for 110 VAC supply
to motor. If 110 VAC is present and motor does
not turn, replace motor (p/n 3000–300–472) (see
page 103 & 104). Check Fowler up/down motor
capacitor. Replace, if necessary (see pages 103
& 104).
F. Check for +5 VDC at pendant port cable (p/n
3000–915–839), pin 11. If voltage is not present,
check pin 11 of connector P5 on the headwall IFC
board. Replace headwall IFC board and/or
cables, if necessary (see pages 199 & 211 for
board and cable locations).
G. Check headwall IFC board for +5 VDC (con-
nector P5, pin 11) output to pendant switches.
Replace headwall IFC board and/or cables, if nec-
essary (see pages 199 & 211 for locations).
H. Replace any one of the following boards, if nec-
essary. Verify interconnecting cables and connec-
tions prior to board replacement.
1.) Foot board IFC board (p/n 3000–500–955)
2.) Litter CPU board (p/n 3000–300–941)
3.) Signal junction board (p/n 3000–300–963)
4.) Headwall IFC board (p/n 3000–303–933) (see
page 199 & 202 for board locations).
I. If motor is operating and Fowler does not move
or moves incorrectly, check the following mechani-
cal items:
1.) Fowler nut damaged. Screw shaft turns but
head section does not move: Check snap ring and
ensure proper fit (see pages 107 & 108).
2.) Motor coupling not turning with motor shaft.
Check coupling for proper operation.
3.) Screw shaft turns but head section doesn’t
move: check CPR cable release and adjustments
(see page 109 & 110).
4.) Check screw shaft guide (white).
5.) Check motor mounting and blue bushings.
Worn bushings may cause excessive noise and
vibration.
6.) Check main pin connecting head litter section
with bracket.
To Next Page
Loading...
