Trouble Shooting - KERN HFD Service Manual

11 Trouble Shooting

Problem
Display is blank,
self-checking
After self-checking error
message stuck
OL or ------ appears on the
display
------ or NULL displayed
Display is unstable
Incorrect value
Cannot use full capacity
Battery not charging
HFD-SH-e-1810
Possible Cause
no Mains power is turned off.
Power supply not plugged in
Internal battery not charged
Display turned off
Pan not installed
Unstable weight
Load cell damaged
Mechanics damaged
Maximum capacity exceeded
Load cell or mechanism damaged
Power supply fault
Weight on the scale below the
permissible limit.
Pan has been removed
Pan support is not seated proper
Load cell or mechanism damaged
Anything is lying and touching
under the pan
Sample is moving
platform
Due to vibration, air variation and
temperature variation
Power supply faulty
Load cell damaged
Calibration error
Calibrated with inaccurate weight.
Goods not placed correctly to the
platform
Wrong unit is displayed
Load cell damaged
Overload stopper is touching
Transporting lock is not removed
Parameter settings incorrectly
Load cell damaged
PCB damaged
Mains voltage is not correct.
Adaptor damaged
Charging circuit failure
Battery failure
Common Solutions
Check the power is going
inside and switch is turned on.
Verify the voltage
Check the pan is installed
correctly.
Check again after turn on the
scale
Check the load cell connecters
Check the platform is installed
correctly
Check again after turn on the
scale
Check the load cell connecters
Check the power connecters
Check the platform is installed
correctly
Try to make zero by pressing
zero key
Check again after turn on the
scale
Check the load cell connecters
Check the scale is acceptable
location and table is good
from the Check the power supply
Check
connecters
Calibrate again.
Check the calibration weight is
correct and accurate.
Check the pan is installed
correctly
Check the goods is placed
correctly.
Check
connecters
Check the transporting lock
and overload stopper
Check the parameters settings
Check the platform is installed
correctly
Check the load cell
Check the PCB
Check the mains voltage
Check the adaptor
Check the power connecters
and circuit
Check the battery
the load cell and
the load cell and
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