Sterling 882.00379.00 manual Find and remove, If needed see

Problem	Possible Cause	Possible Remedy
		Find and remove the
	Material or vacuum line	obstruction, such as a
	plugged.	coupling gasket and gaylord
		bags.
	Filter chamber filter dirty.	Clean filter.
	Vacuum hopper filter dirty.	Clean filter.
	Bad atmospheric/sequence-T	Check for signal, sufficient
		compressed air, proper
	valve.
		wiring and operation.
High-Vacuum alarm.
	Vent valve on pump package	Check for signal, sufficient
		compressed air, proper
	not operating correctly.
		wiring and operation.
	Improper piping.	Locate and correct.
	Convey time set too long.	Reduce convey time.
	Collapsing hoses.	Inspect hoses.
	Faulty vacuum switch.	Test – ON – replace switch.
	Take off compartment	Adjust take-off box.
	closed.
	Conveying times are too	Observe and time the
		hopper(s) when loading.
	long (Time Fill only).
		Note the time needed to fill a
Vacuum receivers are being		hopper. Set the conveying
	Special convey enabled.
overfilled.		time to a few seconds less.
(Refer to enclosed Control	Maximum conveying times	Check proximity sensors for
	are too long (Volume Fill	proper operation and proper
Panel Manual)	only) and the Receiver Full	wiring to PLC. Repair. Re-
	proximity switch(es) are not	set the conveying times to
	being recognized by the	reasonable times. Re-adjust
	PLC.	if needed; see Page 76.
	Poor take-off adjustment.	Observe and time the
		hopper(s) when loading.
	Conveying times are too
		Note the time needed to fill a
Vacuum receivers are being	short (Time Fill only). (See	hopper. Set the conveying
	control panel’s O & I.)	time to a few seconds more.
under-filled.
	Vacuum line leak.	Find and repair leak.
	No material to convey.	Make sure pickup probe is
		buried in material source.
	Vacuum filter is plugged.	Clean and/or replace filter.

Conveying System Mechanical Components Chapter 6: Troubleshooting 96 of 138