Dometic 4809, 4806 Troubleshooting Guide cont’d, Problem, Possible Cause, Service Instructions

4800 SERIES VACUFLUSH TOILETS

Troubleshooting Guide (cont’d)

Problem	Possible Cause	Service Instructions
3. Water does not enter toilet	a. Blocked water supply.	a. Clear blockage in water line or
bowl, but toilet flushes.		filter screen at water valve inlet.
	b. Loose or defective wiring.	b. Check wiring between water
		valve and circuit board pins 15
		and 16.
	c. Defective water valve.	c. Replace if necessary.
	d. Defective circuit board.	d. Replace circuit board.
4. Water does not enter toilet in	a. Electrical failure.	a. Check for loose or defective
“Add Water” switch position.		wiring between flush switch
		and circuit board pins 1 and 4.
	b. Defective flush switch.	b. Replace if necessary.
5. Water does not shut off and	a. Debris inside water valve or	a. Replace water valve.
toilet bowl overflows.	defective water valve.
6. Flush ball cycles constantly	a. Electrical short circuit.	a. Check wiring between flush
between open and closed		switch and circuit board pins 1
positions.		and 4.
	b. Cam switch needs adjustment to	b. See page 14 for cam
	align flush ball.	switch adjustment/flush ball
		alignment.
	c. Defective cam switch.	c. Replace cam switch. See page
		15 for replacement details.
	d. Defective drive linkage.	d. Replace drive linkage. See
		page 15 for details.
7. Flush ball opens slowly.	a. Excessive drag between flush ball	a. Clean surface of flush ball and
	and seal.	under edge of seal. Lubricate
	b. Defective spring assembly.	with alcohol-free cooking spray.
		b. Replace spring.
8. Flush switch must be held in	a. Loose or defective wiring.	a. Check wiring between cam
FLUSH position to close flush		switch and circuit board pins
ball.		11 and 12.
	b. Defective cam switch.	b. Replace cam switch. See page
		15 for details.
	c. Service Mode switch is in Service	c. Return Service Mode switch to
	position.	Normal position.
9. Flush ball does not close	a. Cam switch needs adjustment/	a. See adjustment/alignment or
completely.	flush ball alignment or replacement.	replacement details on page
		14.
	b. Rotor cam shaft loose or	b. See replacement instructions
	defective.	on page 15.
10. Flush ball does not open	a. Rotor cam shaft is loose or	a. See instructions for repair or
completely.	defective.	replacement on page 15.
	b. Weak or defective spring	b. Replace spring.
	assembly.	c. Clean surface of flush ball and
	c. Excessive drag between flush	under edge of seal. Lubricate
	ball and seal.	with alcohol-free cooking
		spray.
11. Squeaky noise occurs during	a. Lubrication needed between flush	a. Lubricate with alcohol-free
flush cycle.	ball and seal.	cooking spray.
	b. Lubrication needed between drive	b. Lubricate joint with silicone
	arm/linkage joint.	grease.
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