NuTone CV400, SFDB-DC manual Troubleshooting Guide

8. TROUBLESHOOTING GUIDE

PROBLEMS	POSSIBLE CAUSES				POSSIBLE REMEDY
1. Loss or	•	The plastic cap is not installed on			•	Place the included plastic cap on
decrease		the unused inlet.				the unused inlet opening.
of vacuum	•	Debris pail or disposable bag is			•	Change disposable bag or empty
occurs.		completely full.				debris pail as described on page 4.
					NOTE: Clean secondary filter if
						necessary.
	• Obstruction in the hose. A blockage				• Disconnect the hose from the wall
		in the hose can be determined by				inlet and insert a blunt instrument
		inserting the hose into any wall				into the hose — slightly smaller in
		inlet and, while power unit is				diameter — such as a flexible
		running, check each additional				garden hose. Push the garden
		inlet for normal suction by holding				hose through the cleaning system
		the palm of your hand over the				hose until the obstruction has
		open inlet. If normal suction is felt				been cleared.
		at all other inlets, insert the hose
		into a second inlet. If the blockage
		still exists it is located in the hose.
		However, if the blockage does not
		occur when the hose is changed,
		the blockage is probably located in
		the tubing system leading to the
		original inlet.
	•	Obstruction in the tubing system			•	Insert hose end into any inlet with
		inside the walls.				power unit running, place the palm
						of your hand over the opposite
						end of the hose. When you can
						feel the suction increase, hold
						your hand over the hose end for a
						few seconds and then quickly
						remove your hand. This procedure
						repeated	several times	should
						clear the	obstruction.	If the
						blockage is not cleared, contact
						your nearest Service Center.
	• Wall inlet cover		not	properly	• Check all wall inlet covers to be sure
		sealed.				they are closed and sealed tightly.
2. Power unit	•	Defective inlet. Check other wall inlets.			• Replace defective wall inlet.
does not	•	Power unit overcurrent		protector	• Turn the		unit off by using the
start or		has been activated.				power switch on the unit. Check
stops						the overcurrent protector		button
suddenly.						located on the left side of the
						power unit (push to reset the
						system). Turn unit back on.
	• Blown fuse or		tripped circuit		• Replace fuse or reset circuit
		breaker on house electrical panel.				breaker on house electrical panel.
	•	Thermoprotector	has	been	• Turn the		unit off by using the
		activated.				power switch on the unit. Wait
						30 minutes to let the unit cool
						down. Turn unit back on.
	•	Defective hose.			• Replace hose as required.
3. Power unit	•	An electrical short has occurred			• A complete check of all wall inlets
fails to stop		somewhere in the system.				and power unit low voltage control
when the						leads connections.
hose is						Contact your authorized		Service
removed.						Center.

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