Bunn DUAL SH DBC Operating Manual page 49

TROUBLESHOOTING (cont.)
Problem
Spitting or unusual steaming from
sprayhead or air vents. (Water too
hot) (cont.)
Inconsistent beverage level in
server.
Possible Cause
3. Electronic control board
1. Strainer/fl ow control
(.750 GPM)
2. Improper water pressure
3. Brew Valve
4. Bypass Valve
5. Lime buildup
Page 49
Troubleshooting Procedures
Perform the previous procedure
for testing triacs. If the voltage
measured is very low or zero, then
substitute a control board known to
be in good working order.
(A) Direction of fl ow arrow must be
pointing towards the brewer.
(B) Remove the strainer/fl ow control
and check for obstructions. Clear or
replace.
Check operating water pressure to
the brewer. It must be between 20
and 90 psi (138 and 620 kPa).
Test the Brew Valve. Refer to Testing
Individual Components on pages
37-39. Turn the valve on for 30 sec-
onds and collect the water dispensed
from the sprayhead. Repeat the test
several times to confi rm a consistent
volume of dispensed water. If not
consistent, check the valve, tubing
and sprayhead for lime buildup.
If bypass is being used on the
inconsistent brewing recipe, test
the Bypass Valve. Refer to Testing
Individual Components on pages
37-39. Turn the valve on for 30 sec-
onds and collect the water collected
from the bypass opening. Repeat
the test several times to confi rm
a consistent volume of dispensed
water. If not consistent, check the
valve, tubing and bypass opening
for lime buildup.
Inspect for lime buildup that could
block the tank, tank fi ttings, tubing,
valves and sprayhead.
29877.2 121504