Hill-Rom P1441B - Motor Assemblies; Battery Backup; Controls

Introduction
Chapter 3: Theory of Operation
3
Hill-Rom® Basic Care™ Bed, Hill-Rom® 305 Manual Bed, Page 3 - 3
Hill-Rom® 405 Electric Bed Service Manual (MAN336 REV 2)
Motor Assemblies
Thermal regulators are an integrated part of the motors, that protect them in the
event that an overload condition occurs. Thermals will stop the motor
automatically if it heats up to a certain temperature. The motors will not run
again until the automatic thermal resets.
Battery Backup
When no mains power is supplied to the electric bed, the battery backup
system can operate the functions such as: CPR, Trendelenburg, and Reverse
Trendelenburg, The operation is for one cycle with the safe working load
(SWL) of 450 lb (204 kg) on the bed. For the battery backup wiring diagram,
see figure 1-6 on page 1-14.
Controls
On the electric bed, patients or caregivers can push the low voltage controls,
located on the head siderail, to change the angle of the head and knee sections
and the height of the bed. Use the foot rack located beneath the sleep surface,
to manually adjust the angle between the foot and knee sections. The manual
Basic Care™ Bed uses cranks located at the foot end to operate the same
functions.
Both the manual and electric versions of the bed have manually operated
Trendelenburg and Reverse Trendelenburg functions. The electric Basic
Care™ Bed uses the hilow motor to put the bed into Trendelenburg or Reverse
Trendelenburg after it is operated.
NOTE:
The lockout controls have the ability to make one, or all three motors on the
electric bed inoperable.