LP600 Users Manual
Rev E, February 2017
Page 37 of 43
Error Messages
Error messages displayed can be a helpful diagnostic tool. The following table
describes some possible causes and solutions.
EEPROM FAILURE Calibration information lost or corrupted
Calibration information is held in a special permanent memory area. A checksum code is generated and written to this
memory during the calibration process. Each time the power is turned on this code is regenerated and compared to the
stored value. If a change is found this error message is displayed. Recalibration may clear the error display, but if the
problem persists the control panel will have to be replaced.
The A/D circuit board has indicated a fault and needs to be repaired or replaced.
Power-up Self Test has detected one or multiple load cell errors
A load cell may have failed or there is a bad connection. The “xx” shows which cell or connection has failed: xx=1-8
(single digit) if there is a single load cell failure. A two-digit value for “xx” is a code to indicate multiple cells have failed
or are disconnected
Run-time checking has detected one or multiple load cell errors
A load cell circuit may have failed or there is a bad connection. The “xx” shows which cell or connection has failed:
xx=1-8 (single digit) if there is a single load cell failure. A two-digit value for “xx” is a code to indicate multiple cells
have failed or are disconnected
This message indicates that the control panel has measured the battery voltage and found it to be too low. The most
likely cause is that the batteries need to be charged. If the charge indicator fails to light up when the charg er is plugged
in, then the charger or cable may be defective. If the batteries have been charged for the recommended time and fail to
run for the specified duration, then the batteries may need to be changed. If a new set of batteries fail to correct the
situation, then the control panel may need to be replaced. Also check the battery holder and wiring.
Overload or calibration information lost or bad load cell
The control panel has detected a weight reading that is larger than expected. This may be caused by the application of
too much weight to the platform. If this display is seen when there is no weight on the platform, then the most likely
causes are a defective load cell or defective control panel. To isolate the problem, measure the signal across pins two
and three on the load cell connector on the control panel. This should be between zero and one millivolt. If found to be
higher or lower, then the load cell system must be checked. See procedure elsewhere in this manual. If the signal is
within this range then the calibration data may be lost. Attempt to recalibrate the scale. If this does not clear the
problem, then replace the control panel.
Scale tried to zero off a load outside the range specified in the zero range setting. Remove any load and press zero.
Number can't be displayed (such as -99999)
The most common cause of this error is pressing the zero key with a full load on the scale. When the load is removed,
the full number with a minus sign will not fit on the display. Pressing the zero key again will clear this display.
Diagnostic power-up message
This won’t affect normal operations and can typically be ignored.
See the “Totalizing Setup” section for setup details. Or press LOCAL/TOTAL to change to the standard LOCAL display
if totalizing is not needed.
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