Hill-Rom RESIDENT P872, Service Manual, Page: 64 / 178

2.7 Knee Actuator Malfunction
Chapter 2: Troubleshooting Procedures
Page 2 - 34 RESIDENT® Low Bed Service Manual (man259)
Yes No
↓ →
If only one button produces a click when pushed, go to RAP 2.5.
If there is no click when either button is pushed, replace the
electrical control/lockout box (refer to procedure 4.9).
4. Check the knee actuator cable connection at the electrical control/lockout
box.
The connection is sound.
Yes No
↓ →
Insert the loose plug firmly into its socket. If this solves the
problem, go to “Final Actions” on page 2-16. If not, go to step 5.
5. Check the condition of the cable between the electrical control/lockout box
and the knee actuator.
The cables show no signs of damage.
Yes No
↓ →
If the cable is damaged, replace the knee actuator (refer to
procedure 4.13).
6. Press and hold the knee up button (A) on the hand pendant.
The knee section rises smoothly until it is at an angle of approximately 15°
(± 2°) and stops automatically.
Yes No
↓ →
Check for interference from other parts of the bed. If interference
is found, correct it. If no interference is found, replace the knee
actuator (refer to procedure 4.12).
7. Press and hold the knee down button (B) on the hand pendant.
The knee section lowers smoothly until it is flat and stops automatically.
Yes No
↓ →
Check for interference from other parts of the bed by raising the
knee until it is at approximately 15°. If interference is found,
correct it. If no interference is found, replace the knee actuator
(refer to procedure 4.13).
8. At the electrical control/lockout box, push in the knee actuator lockout
button (C) (see figure 2-15 on page 2-35).