KERN KERN AEJ, Service Manual

Page: 9 / 32

SYMPTOMS CAUSES & REMEDY
Corner Error is too much.
1. Mechanical unit is defective. Leaf spring is bent
or twisted.
2. Pan base touch other parts.
Display suddenly disappeared. 1. HT-DP board is defective.
2. AC adaptor is defective.
or
appears.
1. HT-DP board is defective.
2. Coefficient memories (address data) have
changed by noises or static electricity. Re-set the
address data and/or adjust the linearity.
appears.
1. The weight of reference sample is too light (%
mode, counting mode).
appears.
1. Wrong external weight is used in span calibration
(external weight must be more than 50% of
scale capacity).
appears.
1. Span error exceeds 1% of scale capacity in
span calibration. Check the external weight.
appears.
1. During calibration there was a weight on the
weighing plate. Remove it from the pan.
appears.
1. Span error exceeds 1% of capacity in automatic
span calibration.
appears.
1. Interval time is not properly set.
appears.
1. Internal clock is defective. Check internal clock
and replace HT-DP board, if necessary.
[
r - Err
] appears.
1. The weight error exceeds ±100.00mg. Re-set the
weight error within ±100.00mg
[
A - Err
] appears.
1. Internal calibration automatics defective
appears.
1. Wrong operation in Cumulate Function or Net
Addition Function.
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