Hill-Rom Affinity P3700E - Hilow Malfunction; Air System Malfunction

2.4 Hilow Malfunction
Chapter 2: Troubleshooting
Affinity® Four Birthing Bed Service Manual (195826 REV 2) 2 - 13
2
2.4 Hilow Malfunction
The hilow motor does not operate. If the motor operates, but has other problems, go to “Head Drive
Operation Failures” on page 2-15.
1. The other bed functions operate, and the hilow function does not operate on the opposite siderail.
Yes No
Troubleshoot the siderail control panel. Go to Procedure 2.1 on page 2-9.
2. Use the Foot Up control to raise the foot section to the highest position. Make sure the bed is not in
the Trend-like position. The hilow function does not operate.
Yes No
Go to “Final Actions” on page 2-9.
3. Remove the top motor cover (see Procedure 4.1 on page 4-3), and set the multimeter to read DC
volts (V DC).
4. Put the positive lead on pin 1of the P15 connector, and the negative lead on pin 2 of the P15
connector (see
Figure 2-2 on page 2-3). The voltage measures 24-35 V DC when the Bed Up control
is activated, and -24 to -35 V DC when the Bed Down control is activated.
Yes No
Adjust the hilow limit potentiometers (see Procedure 4.5 on page 4-9). If this solves
the problem, go to “Final Actions” on page 2-9. Otherwise, go to Step 6
5. Go to Step 8.
6. Set the multimeter to V DC. Put the negative lead on pin 1 of the R9 resistor and the positive lead on
pin 3 of the P15 connector. The voltage measures 4.5-5.5 V DC.
NOTE:
Pin 1 of the R9 resistor is the pin closest to the P3 connector (see Figure 2-2 on page 2-3).
Yes No
Replace the logic control P.C. board (see Procedure 4.21 on page 4-36).
7. Set the multimeter to V DC. Put the negative lead on pin 1 of the R9 resistor and the positive lead on
pin 4 of the P15 connector. The voltage measures less than 0.25 V DC when the bed is not in the low
position.
Yes No
Replace the logic control P.C. board (see Procedure 4.21 on page 4-36).
8. Replace the hilow section motor (see Procedure 4.4 on page 4-6) and go to “Final Actions” on
page 2-9.
2.5 Air System Malfunction
1. The other bed functions operate, and the air system does not operate on the opposite siderail.
Yes No
Troubleshoot the siderail control panel. Go to Procedure 2.1 on page 2-9
2. Make sure that the bed is connected to AC wall power.
3. Use the Bed Up control to raise the bed to the highest position.
4. Remove the top motor cover to gain access to the logic control P.C. board (see Procedure 4.1 on
page 4-3).