TROUBLESHOOTING
Troubleshooting
Before contacting service personnel, refer to the following instructions to check and to
correct any failures.
Symptom
Scale does not turn on
Questionable weight or
the scale does not zero
The display shows
"OVER"
The display shows
"UNDER"
The display shows
"Lo"
P/N UM553KL_553KG Rev20190412_web
Possible Cause
1. Dead battery
2. Faulty electrical outlet
3. Bad power supply
1. External object
interfering with the scale
2. The display did not
show "0.0" before weighing
3. Scale is not placed on a
level surface
4. Scale is out of
calibration
The load on the scale
exceeds the capacity
553KL:44 lb / 20 kg;
553KG: 20 kg
Negative weight, indicating
a tare was present. Load
on the scale is below initial
zero point.
The batteries are depleted
10
Corrective Action
1. Replace batteries
2. Use a different outlet
3. Replace AC adapter
1. Remove interfering object
from the scale
2. Remove the patient from
the weighing tray, zero the
scale and begin weighing
process again
3. Place the scale on a level
surface and begin weighing
process again
4. Check weight with known
weight value
Remove the excess weight
and use the scale according
to its limits
Clear scale of any weight
and re-zero the scale by
pressing ZERO/CLEAR
button.
Replace batteries according
to instructions