KERN HFM Service Manual page 11

(------) or Lo:
• Weight is below permissible limit.
• Check loop and hook seated proper and installed correctly.
• Calibrate again with correct calibration weights.
• Power Supply faulty. Check all power cables and connecters.
• Load cell damaged. Check load cell connections and connecters.
• Try to turn on again.
Unstable display:
• Check loop is seated proper
• Check any vibrations, noises, sudden temperature changes.
• Check power supply.
• Check battery and connect to charging.
• Check the hook and load weight is proper.
• Check the load cell connections and connecters.
Incorrect value:
• Calibration error.
• Calibrate again with exact calibration mass weights.
• Check the weight sample is hanging proper and avoids touching the cover or
surface.
• Check power supply and battery.
• Check load cell connections and connectors.
Can not use scale full capacity:
• Before weighing make sure zero indication is showing and scale is empty.
• Check the weighing mode.
• Check the load cell is fitted proper and touching housing or hitting somewhere.
• Calibrate again with exact calibration mass weights.
• Load cell damaged. Check load cell connections and connectors.
• Main Board problem.
Battery not charging:
• Mains voltage problem. Check the power supply voltage and adaptor voltage.
• Charging circuit failure.
• Battery failure. Check the battery connections.
HFM-SH-e-1110 11