Trouble Shooting - KERN MCC-NM Service Manual

8.5 Trouble Shooting

Problems
Display is blank.
No self test
Blank display
after self test
OL or -------
------- or NULL
displayed
Display is
unstable
Weight value
incorrect
Can not use full
capacity
Platform Corner
MCC-NM-SH-e-1810
Possible cause
Mains power is turned
off. Power supply faulty
or not plugged. Internal
battery is not charged.
On/Off switch problem
Pan not installed.
Unstable weight, load
cell damaged
Maximum capacity
exceeded. Load cell or
mechanics damaged.
Power supply faulty
Weight is on the
platform is below
permissible limit. Pan
not installed correctly.
Power supply faulty.
Load cell or
mechanism faulty
Goods touching
somewhere. Air
variation or any
vibrations.
Temperature changed.
Load cell or
connections faulty.
Power supply faulty
Calibration error.
Platform of load cell
touching somewhere.
Wrong weighing unit
Over load protection
stoppers or transport
locks are not removed.
Parameters are set
incorrectly.
AD problem.
Load cell or
mechanism damaged
Over load protection
Common Solutions
Check power is getting inside the
scale and on/off switch is working.
Verify the voltages, which is on the
power labels.
Check the pans are installed
correctly. Try to turning on again.
Check the platform is installed
correctly. Try to turn on the scale
again. Do the calibration again
Check the platform is installed
correctly. Try to turn on the scale
again.
Do the calibration again
Check the scale is in acceptable
location.
Check the connecters and load cell.
Check the power supply and battery
Use accurate weight for to do the
calibration
Check the pan and load cell is
installed proper and touching.
Check the parameter settings.
Check the load cell and connecters
Check the stoppers and locks under
the platform.
Check the weighing unit and
parameter settings.
Check the load cell.
Check the stoppers and locks under
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