Bunn JDF-4D TROUBLESHOOTING Continued, Problem, Probable Cause, Step-down transformer, Remedy

TROUBLESHOOTING (Continued)

PROBLEM PROBABLE CAUSE REMEDY

Unit is not working 1. Step-down transformer.

Check for 120/24 or 230/24 vac. If no 24vac reading, replace step-down transformer.

	2. Main control board.	If 24 vac present and no LED’s lit,
		replace control board..
Difficulty brixing and/or weak bever-	1. Product viscosity or too cold.	Thorough thaw of product before use
age		(35° - 40°)
	2. Low water pressure.	Maintain 20 psi or higher and a mini-
		mum flow rate of 1 fl oz/sec.
	3. High water pressure.	Over 100 psi, install a pressure regu-
		lator and set to 50 psi.
	4. Dispense valve adjustment set-	A) Perform 3 second water dispense
	ting.	test. Factory setting is 1.0 oz/sec.
		Acceptable water flow rate is .-0.8
		to 1.5 oz/sec depending on the mix
		ratio (4+1).
		B) Adjust water to proper mix ratio.
		Once water is set, adjust motor speed
		to achieve brix %.
	5. Brix ratio.	Check for proper brix ratio per prod-
		uct using Total Dispense method and
		or refractometer method.
Difficulty brixing and/or weak bever-	1. Pump tubing.	Inspect, clean, or replace tubing
age		and pump rotor/rollers for ease of
		rotation.
	2. Use of portable water pump.	A) Follow plumbing requirements for
		pressure and flow rate.
		B) Source another portable pump
		or water supply that meets require-
		ments.
Difficulty brixing bag-in-box	Vacuum leak	Inspect all lines and connections
		from bag-in-box connector to bottle
		adapter assembly.

11 49179 110613