Bunn TWIN, ITB manual or display shows FILL TIME TOO

TROUBLESHOOTING (cont.)
PROBLEM	PROBABLE CAUSE	REMEDY
Automatic refill will not operate	1. No water	Check plumbing and shut-off
or display shows FILL TIME TOO		valves
LONG	2. Refill probe or Sensitivity set-	Remove the strainer and check for
	ting	obstructions. Clear or replace.
	3. Refill valve	Check the sensitivity setting. Refer
		to the REFILL function on page
		40. If the left three digit number
		is less than the right number, the
		machine “thinks” it is full and the
		refill valve should be off. If the left
		number is larger than the right, then
		the refill valve will automatically be
		turned on to fill the tank. The right
		number is the threshold setting and
		can be adjusted to compensate for
		extreme water conditions: very pure,
		low conductance water requires a
		higher setting, while high mineral
		content, high conductance water
		requires a lower setting. Note that
		the left number changes from a high
		value when water is NOT touching
		the refill probe to a low valve when
		water IS touching the probe. For
		best operation, the right number
		should be set to a value midway
		between these low and high num-
		bers. Before changing the setting,
		confirm that the refill probe is free
		of scale buildup and the connection
		to it is secure. Test the refill valve.
		Refer to the test outputs procedures
		on page 48.

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