Sterling 882.00268.00 specifications Problem Possible cause Solution

Problem	Possible cause	Solution
Control is on and working, but	Faulty compressed air	Repair connection/replace
valve does not work.	connection to valve.	connector. Must have
		minimum 60 psi.
	Inadequate incoming vacuum	Locate problem, repair/ replace
	signal and voltage.	as needed.
	Loose connection wiring in	Repair/replace as needed.
	control box.
	Improper shroud solenoid	Compare voltage rating of
	voltage compared to control	solenoids in shroud to output
	output voltage.	voltage of controls.
		Check solenoids in shroud and
		replace as needed.
Control does not work.	Inadequate voltage.	Check supply voltage.
		Make sure the unit has power.
	Loose control wiring in control	Repair as needed.
	box.
Sudden loss in conveying rate.	Control malfunction.	Repair as needed.
Possible loss of up to
	Valve jammed with material.	Clean out valve.
20% conveying rate compared to
	Inadequate air pressure.	Correct as needed. Minimum
non- proportioning unit.
		60 psi required for operation.
	Worn plungers.	Replace plungers (Part No.
		W00533565).
	Clogged filter hopper.	Clean or replace filter.
	Excessive vacuum leaks/ loose	Repair/replace as needed.
	connections to valve.
	Worn cover seal.	Repair/replace as needed.
Plungers move slowly, stick, or	Inadequate air pressure.	Correct as needed. Minimum
do not seal properly.		60 psi required for operation.
	Inadequate lubrication of air	Lubricate air cylinder.
	cylinder.
	Solenoids are malfunctioning.	Repair/replace as needed.
	Worn/malfunctioning plungers.	Repair/replace plungers as
		needed.
	Sticking plungers.	Replace air cylinder.
		Consult factory.
Remote Proportioning Valve	Chapter 6: Troubleshooting	26 of 30