Bunn Silver Series Service & Repair Manual page 11

TROUBLESHOOTING (Continued)
PROBLEM
Unit is not working
Difficulty brixing and/or weak bever-
age
Difficulty brixing and/or weak bever-
age
Difficulty brixing bag-in-box
PROBABLE CAUSE
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 setting.
5. Brix ratio.
1. Pump tubing.
2. Use of portable water pump.
Vacuum leak
11
REMEDY
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 mini-
mum flow rate of 1 fl oz/sec.
Over 100 psi, install a pressure regu-
lator 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.
49179 110613