Bunn OT Operating & Service Manual page 102

Part II
TROUBLESHOOTING (cont.)
Problem
Spitting or unusual steaming from
sprayhead.
Inconsistent beverage level in de-
canter.
Consistently high or low beverage
level in decanter.
Dripping from sprayhead.
Probable Cause
1. Control Thermostat
2. Lime build-up
CAUTION
Tank and tank components should
be delimed regularly depending on
local water conditions. Excessive
mineral build-up on stainless steel
surfaces can initiate corrosive reac-
tions resulting in serious leaks.
1. Flow control
2. Improper water pressure
3. Syphon system
1. Brew Timer adjustment
1. Syphon system
2. Solenoid Valve
Page 10
Remedy
Refer to Service - Control Thermo-
stat for testing procedures. See
page 16.
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
(A) Direction of flow arrow must be
pointing away from the solenoid.
(B) Remove the control and check
for obstructions. Clear or replace.
Check the operating water pressure
to the brewer. It must be between 20
and 90 psi (138 and 620 kPa).
Water should flow freely from the
sprayhead for approximately twenty
seconds after the brew solenoid
has shut-off and then stop flow-
ing abruptly. The brewer must be
level from front-to-back to syphon
properly.
Adjust the brew timer as required to
achieve the recommended 64 oz for
each brew cycle.
Water should flow freely from the
sprayhead for approximately twenty
seconds after the brew solenoid
has shut-off and then stop flow-
ing abruptly. The brewer must be
level from front-to-back to syphon
properly.
Refer to Service - Solenoid Valve for
testing procedures. See page 22.
32440 070700