Does the indicator turn ON.

Bad indicator If no, check indicator buy using another one. Even if different model at least it should come on.

Poor connection: If in doubt take connection apart and clean them, if not, replace terminal and clean

Battery post.

Bad battery: If you suspect a bad battery, try replacing it with another one. Do not be fooled if using a voltmeter to test your battery. A weak battery may test good if checked when there is no load on the battery.

Bad power cable: Make sure the power cord red wire is connected to the plus(+) positive side and the black(-) negative is connected to the negative side of the battery. If using a voltmeter check between pin 1

positive and pin 2 negative. The meter should read between 10.5 and 14.5 volts DC.

Is the indicator stable or does it display a error message?

O-cap When the scale containes over 105% of the capacity weight.

O-load When the scale contains more weight than the indicator is capable of measuring or displaying

U-load. If the loadcell are sending a negative weight signal which is to great for the indicator to

Accurateley measure.

Lobat If the input power falls below the minimum level that the indicator requires to operate.

No A2d If there is an error communicating with the A/D module which read the loadcells to

Calculate a scale weight.

Note: if the scale reads o-cap or lobat neither one of these conditions is a loadcell problem.

If the scale is unstable or display an error code: Open up the junction box, remove no. 1 loadcell from the junction box terminal block. Does the scale stablize or error code message is no longer diplayed? If yes that is the bad loadcell, if not replace loadcell cable back in junction box and disconnect loadcell no.2

Repeat procedure until bad loadcell is found. And then replace loadcell. When the bad loadcell is pulled out of the junction box the scale will become stable or the error message will no longer be displayed.

Stand on or hang your weight over each loadcell: Does the indicator respond to your weight when you stand or hang on the scale? If yes are the readings all positive? If readings are not all positive check wiring of loadcells in junction box. If scale does not respond to weight, check for bad junction box cable, bad junction box, check all cables for flat or pinched spots.

Does the scale weigh you approximatley the same over all loadcell. Ex. A 200lb. Man may weigh 330 pounds when standing on three loadcells but may weigh only 40 pounds when standing on the fourth loadcell. The 40 pound loadcell is always the bad one.

Does the scale weigh you the same on all corners but not your weight: Ex. A 200lb man might weigh

240 pounds on all four corners, scale may not be calibrated correctly.

Important thing to remember when trouble shooting a scale system: FIRST know that your indicator

Is working, if you have a known good working indicator, it has now become the best test insrument you can use to trouble shoot the rest of the scale system.

Break the whole scale system down into 4 basic parts:

1 Power to the scale, do you have proper power to operate the indicator.

2 Indicator, does the indicator work correctly.

3 Junction box and junction box cable, do they both work and are they wired correctly.

4 Loadcells, do they all work and weigh the same?