Bunn SILVER SERIES JDF-4S User Manual

24

Unit is not working

Difficulty brixing and/or weak bev-

erage

Difficulty brixing and/or weak bev-

erage

Difficulty brixing bag-in-box

1. Step-down transformer.

2. Main control board.

1. Product viscosity or too cold.

2. Low water pressure.

3. High water pressure.

4. Dispense valve adjustment set-

ting.

5. Brix ratio.

1. Pump tubing.

2. Use of portable water pump.

Vacuum leak

Check for 120/24 or 230/24 vac. If no 

24vac reading, replace step-down 

transformer.

If 24 vac present and no LED’s lit, 

replace control board..

Thorough thaw of product before 

use (35° - 40°)

Maintain  20  psi  or  higher  and  a 

minimum flow rate of 3 fl oz/sec.

Over  100  psi,  install  a  pressure 

regulator and set to 50 psi.

A) Perform 3 second water dispense 

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 %.

Check for proper brix ratio per prod-

uct  using  Total  Dispense  method 

and or refractometer method.

Inspect,  clean,  or  replace  tubing 

and pump rotor/rollers for ease of 

rotation.

A) Follow plumbing requirements 

for pressure and flow rate.

B) Source another portable pump 

or water supply that meets require-

ments.

Inspect  all  lines  and  connections 

from bag-in-box connector to bottle 

adapter assembly.

39992 042007