3M FSTMO75 manual Troubleshooting Guide, Problem Cause Solution

Troubleshooting Guide

Problem	Cause	Solution	Notes
		Repair Beverage Booster	Contact Dealer
		Pump/System
	Low Feed Water Pressure
		Add Booster Pump Assembly	Only if Beverage Booster System is
			not installed
	RO Membrane Fouled	Replace RO Module and SFC	Feed Water Pressure, Temperature,
			RO Module Flow Rate and Reject
		Tubing (Stealth Flow Control)
Unit Runs Low or			Water should be checked
Out of Water		Drain Tank using Sample Valve,	Unscrew Blue Cap to access Schrader
	Storage Tank Air Charge	with Sample Valve Open, Pump-
		up Air Charge, 8 -10 psi (55.2	Air Valve
	is Low
		- 68.9 kPa), close Sample Valve
	Pre-Filter is Plugged by	Replace Pre-Filter	A more frequent Pre-Filter change-out
	Sediment (Particles)		schedule may be needed
	Slow Leak in the Distribu-		The unit produces filtered water
		Repair Leak	slowly. A dripping leak can prevent
	tion Line		the tank from filling
	RO Membrane Partially	Replace RO Module and SFC	High levels of hardness minerals may
	Fouled, Unit can not pro-
			be present in feed water, monitor
	duce enough water to	Tubing (Stealth Flow Control)
			reject flow for plugging
	keep up the demand
Unit Never Shuts Off		Check Reject Water flow to drain
	Product Water Check	in the morning. Unit should be
(Continually Runs to
		off and no flow to drain. If flow
Drain)	Valve has failed allowing		Reject Water flow to drain should stop
		to drain exists, turn off the feed
	storage tank flow to drain		when the feed water valve is off
		water valve and check for flow to
	after unit is shut off	drain on 10 minutes. If the flow
		to drain remains steady, replace
		RO Module
	Hydraulic Shut-off Valve	Replace valve	Should only be performed by a quali-
	has failed		fied technician

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