NCR 7870 manual Scale Troubleshooting Chart

Chapter 8: Troubleshooting 8-3

Scale Troubleshooting Chart

Note: This information does not apply to the NCR 7870-4000 which uses a Bizerba scale. For information on troubleshooting or servicing an NCR 7870-4000 scale unit, refer to the Bizerba documentation or contact the Bizerba representative.

Problem	Possible Cause	Corrective Action
Error code 5 - - - -	Scale drift	1.	Verify nothing is on scale.
displays		2.	Lift Top Plate and verify no
			objects are under it.
		3.	Push Reset/Scale Zero button.
		4.	Power down/up unit.
		5.	If error code persists, have unit
			repaired.
Error code 4 - - - -	Possible scale error	1.	Press Scale Zero button and retry.
displays		2.	If error code persists, have unit
			repaired.
Error code 4 - - - -	Slight vibration to scale	Calibrate scale. Ensure there is no
displays during	during calibration	external scale movement while
calibration		weights are on scale.
Scale display is	Top Plate prevented	1.	Remove any interference around
blank	from moving down		edge of Top Plate and
			checkstand.
		2.	Remove any foreign objects from
			under Top Plate.
		3.	Push Reset/Scale Zero button.
Intermittent error	+12 VDC is unstable	Have 7870 repaired.
codes