Stryker Medical 2025, Maintenance Manual

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Electrical Troubleshooting
29
TROUBLESHOOTING GUIDE (CONTINUED)
PROBLEM/FAILURE RECOMMENDED ACTION
No Fowler up motion. A. Check for 120 VAC on HDR11, Pin 3 and Pin 2
of the power board.
B. Check for 5 VDC on HDR2 Pin 2 and HDR4
Pin 1 of the CPU board.
No Fowler down motion. A. Enter diagnostics, (see page 19) and check
for Fowler down motion. If motion is present, re–
burn Fowler potentiometer (see page 25, step 11).
B. Check for 120 VAC power on HDR11 Pin 3 and
Pin 1 of the power board.
C. Check for 5 VDC signal on HDR32 Pin 1 and
HDR33 Pin 1 of the CPU board.
No Trend motion. A. Check for jumpers on HDR10 of the power
board and HDR24 of the CPU board.
B. Check for bed up and down limits.
C. Check for 120 VAC on HDR6, Pin 3 and Pin 4
of the power board.
D. Check for 5 VDC on HDR32 Pin 5 and HDR4
Pin 1 of the CPU board.
SCALE SYSTEM TROUBLESHOOTING GUIDE
PROBLEM/FAILURE RECOMMENDED ACTION
Scale weighing too light – all positions. A. Verify the bed has been properly calibrated (see
page 21).
Scale weighing too light – one position. A. Verify nothing is interfering with the weighing
surface and the stationary surfaces of the bed:
Foley bag hooks not touching the base
hood.
Load cell and lift coil cord cables routed
properly and not touching Gatch stand.
Load cells or litter not obstructed.
B. If in Trend position, calibrate bed (see page 21)
and check again.
C. If in reverse Trend position, ensure Foley bag
hook is not touching the litter frame.
Scale weighing too heavy – all positions. A. Verify the bed has been properly calibrated (see
page 21).
B. Use a known weight at each corner of the bed
and verify the counts change the same for each
corner. If a load cell does not change properly,
replace the load cell (see page 20).
C. Replace the CPU (see page 19) and calibrate
the bed.