28 7821 User Instructions
Error Codes and Troubleshooting
7.1 Troubleshooting
Perform the following steps in the order presented until the described problem is
corrected. If the problem cannot be corrected, contact your Avery Weigh-Tronix service
provider.
No Power (Display is Blank)
1. Check that the primary side of the cord is plugged into the AC outlet, and the
secondary side is properly connected to the power jack on the back of the scale.
2. Replace the power supply.
Missing or extra segments on display
1. Replace the display board.
Scale will not return to zero, or incorrect weight is displayed
1. Press the ZERO key.
2. Check for interference of weighing platform.
3. Power off, remove all items from the platter, and then power on the scale.
4. Recalibrate the scale.
Display shows unrecognized characters
1. Power down, then power up the scale.
2. Check software PROM for proper insertion.
3. Check display cables for the proper connection.
Display shows under _ _ _ _ _ dashes
(Indicates that the scale is below zero or under capacity.)
1. Verify that weigh platter is on the scale.
2. Verify that nothing is interfering with or rubbing against the weighing surface.
3. Press the ZERO key.
4. Power down, then power up the scale.
5. Recalibrate the scale.
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