Introduction
Chapter 3: Theory of Operation
Basic Care™ Bed Service Manual (man336)
Page 3 - 3
3
NOTE:
When JP8 is in the LO position, the end of the connector is adjacent to the
word LO on the control board. When JP8 is in the HI position, the end of the
connector is adjacent to the word HI.
Motor Assemblies
Thermal regulators are an integrated part of the motors, protecting 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 Basic Care™ Bed, the battery
backup system can operate the following functions: 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 1-16.
Controls
On the electric Basic Care™ Bed, patients or caregivers can change the angle
of the head and knee sections and the height of the bed by pushing low voltage
controls located on the head siderails. The angle between the foot and knee
sections can be manually adjusted by using the foot rack located beneath the
sleep surface. 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 Basic Care™ 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 on the electric Basic Care™ Bed can keep any one or all
of the three motors from operating.
230 V
T1
JP9
HI
240 V
T2
JP9
HI
Input Source Voltage
Transformer
JP9 or JP10 Position
JP8 Position
