Graco BDS Instructions-Parts List Manual page 53

Problem
Dispense flow is too fast
Scale fluctuating
Weights not correct
No scale input
Troubleshooting
Possible Cause
Maximum fluid pressure setting too
high
Minimum fluid pressure setting too
high
Valve needle travel set too long
Valve needle/nozzle size too large
Environmental factors affecting scale
stability
Scale out of calibration
Scale damaged
Wiring
Solution
Decrease maximum fluid pressure
setting
Decrease minimum fluid pressure
setting
Shorten needle travel to more
restricted setting
Install needle/nozzle kit with a smaller
orifice
Check scale area for vibration
Check scale area for air flow
interference
Set scale stability parameters wider
Level scale deck
Replace scale or parts if damaged
Calibrate scale
Level scale deck
Replace scale or parts if damaged
Ensure all connections are correct
Check 10 VDC power supply
Ensure barriers are connected
properly
Ensure 24 VDC to PLC
Ensure connector is snug on
thermocouple module
Ensure cable has not been damaged
Ensure scale platform has not been
damaged
Replace thermocouple/scale module
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