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SCALE NOT WORKING
Example of errors
1.
Error- Scale not at zero
2.
Error- unable to start scale communication, scale disabled
3.
Error initialising ADC
Error 1 – possible causes
Something on the scale when starting up, check scale assembly and under scale for debris.
If the weight on screen is fixed (red) check ADC connection to load cell.
Error 2 and 3 – possible causes
Normally from start-up, check infeed sensor is working (go to service menu / service plc and check
operation of sensors, infeed sensor must not be covered or out of adjustment when starting scale.
Check serial communication cable and plug from ADC to main board serial port.
Fault finding checks on ADC board
With the ADC cover off, the electronic board is visible.
1.
With machine isolator on (but not starting the PC) there should be – 4 red LED's on near to top of the
board, if not check the power supply for the ADC.
2.
A set of 3 green LED's (near bottom of board) will start to flash after about 10 seconds of the isolator
being powered on. If this does not occur, then possible ADC fault.
3.
Start PC – when software has reached operation screen, the set of 3 green LED's will go out. Above
these LED's is a single LED that should now be flashing. If the middle one (D7, of the set of three) is
also on then check infeed sensor.
4.
Putting hand across infeed sensor the middle and top green LED's (D7& D8) will come on for around
5 seconds then go out, returning to the single flashing LED. Check infeed sensor if this does not
occur.
5.
If you put your hand over the outfeed sensor while the middle and top (D7, D8) green LED's are on
the middle one should flash once. If this does not occur check outfeed sensor.
HI, MI, WI-700 service manual - 7 – fault finding
These 3 LED's should be flashing when the isolator switch
is turned on (before the software is started).
7-12
The LED'S are numbered
D8 (top)
D7 (middle)
D9 (lower).
Issue 9 04/2020
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