
7.2
Weighing Troubleshooting
KEENAN troubleshooting tips on weighing
If you experience problems in the operation of the Weighing System, read
through this Troubleshooting section first before contacting KEENAN Service.
Reading Drifting
If the reading on the weighbox is drifting or does not stay steady, the most
likely cause of the problem is dampness/moisture in or around the weighbox or
cables. Please follow these steps to locate and correct the problem.
•
Disconnect the cables on the weighbox. Ensure they are labelled
correctly for reconnection. Check both the plug on the cable and the
connector on the weighbox for dampness and/or corrosion of the
terminals. If any dampness is found dry it off thoroughly with a hair
drier. If corrosion is found on the terminals then clean thoroughly with
electrical cleaner & dry. Reconnect cable and test.
•
Check for loose wiring or dampness. Some machines are fitted with a
junction box. The procedure as detailed above applies.
•
Check weighcell plugs for dampness and also check weighcell cables
for any breaks and/or dampness.
If the above measures do not rectify the problem then contact KEENAN Service
for further assistance.
System Weighing Inaccurately
If the machine is new or the weighbox has been replaced it is possible that
the weighbox may have the incorrect calibration code for the model. Contact
KEENAN service who can go through the procedure to check (or alter) the code.
If you suspect that the system is weighing inaccurately, check all four
weighcells to make sure that they are mounted correctly. If the bolt through the
weighcell has come loose or broken, the weigh cell can rotate resulting in that
weighcell giving an inaccurate reading. To check that the system is weighing
correctly, get some known weight (e.g. a bag of fertilizer) and place it on each
corner of the machine in turn. You should get the same reading for each cor-
ner. If one corner returns a significantly different reading from the other three
then this points to a faulty weighcell on that corner. Also, if receiving a negative
reading, it would indicate that the weighcell is upside down – rotate it 180° and
repeat the test.
Weighbox will not switch ON
Check the power cable thoroughly and make certain that you are getting power
from the tractor to the display. Unscrew the power cable from the weighbox and
ensure there is a good 10 to 13 volt supply across the internal pins of the cable.
If the negative (-) and positive (+) are wired the wrong way around, the weigh-
box will not switch on [Dinamica Generale weighboxes power cable - white (+)
& black (-)].
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