Trouble Shooting - KERN RFC Service Manual

16 Trouble shooting

Problem
Mains power is turned off
Display is Power supply not plugged in
blank, No Power supply faulty
turn on test Internal battery not charged
Display turned off
Display
blank
Pan not installed
after turn on
Unstable weight
test,
Error Load cell damaged
message Mechanics damaged
Display is
locked
Maximum capacity exceeded
OL or FULL
Load Cell or mechanics
appears on
damaged
display
Power supply faulty
Weight on scale below
permissible limit
Pan has been removed
UL or NULL
Pan support not seated properly
displayed
Power supply faulty
Load Cell or mechanics
damaged
Drafts or air currents
Obstruction under pan
Sample is moving (animal
Display is weighing)
unstable Vibrations through table
Temperature changed
dramatically
Power supply faulty
Calibration error, Recalibrate
Linearity error, set Linearity
Unit calibrated with inaccurate
Weight
weight
value
Balance not level
incorrect
Obstruction between sample and
cover
Wrong unit of weight displayed
RFC-SH-e-1810
Possible cause Common solutions
Check power is going to the
scale and switch is on.
Verify the voltage going to the
scale matches the power supply
labels on the power module or
scale.
Check the pans are installed
correctly.
Try turning the scale on again.
Check the pans are installed
correctly.
Try turning the scale on again.
Check the pans are installed
correctly.
Try pressing Zero key.
Try turning the scale on again.
Verify the scale is in a
acceptable location and on a
good table.
Verify the power supply is
correct for the scale.
Calibrate again, paying special
attention to the mass used, the
stability of the scale, and the
weighing units required.
If linearity can be set by the user
it will be described in the user
manual.
Check pan is installed correctly.
Verify installation is acceptable.
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