Maintenance; General; Error Codes; Determine The Problem - KERN MBC-(E) Service Manual

8 MAINTENANCE

8.1 General

Please clean the scale each week and do calibration every year.
If the scale does not operate properly, find out the problem as possible.
Determine whether the problem is constant or alternate. Be aware that problems can be
caused by mechanical or electrical influences.
Check the following.

Water

Corrosive materials

Vibrations or temperature or wind

Physical damage
Check the scale cables for damage, and check all connections and connecters for any loose
contact or incorrect connection

8.2 Error Codes

Error Code
Err 4
Err 6

8.3 Determine the Problem

Determine whether the problem is in the PCB or the Load Cell

Disconnect the power supply from the scale, and disconnect the load cell connection
from the PCB

Reapply power and test the PCB

If problem goes away, its source is probably in the Load cell. Check the wiring,
connecter, load cell and mechanical components of the load cell.

If problem persists, its source is probably in the PCB. Check the PCB voltages,
connecters, cables and function programs

8.4 Check the Load cell


Remove power from the system, and disconnect the PCB from the Load cell

Make sure all leads are connected and correctly.

Check load cell for proper input and output resistances
MBC-NM-SH-e-2011
Description
Zero range exceeded, due to
turning on or by pressing
A/D Count out of the range
POSSIBLE CAUSES

Goods on the platform

Overload, when zeroing
the scale.

Improper calibration

Load cell problem

PCB problem

Platform not installed

Load cell problem

PCB problem
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