Bunn Dual Operating & Service Manual page 11

TROUBLESHOOTING (cont.)
Problem
Water from tank is not hot (cont.).
Server warmer is not hot.
Spitting or unusual steaming from
sprayhead or airvents.
Inconsistent beverage level in server.
Probable Cause
6. Relay (Brewers with Recovery
Booster)
1. ON/OFF switch
2. Warmer element
1A. Control thermostat (Electro/me-
chanical)
1B. Control assembly (Electronic)
2. Triac assembly (Electronic)
3. Lime build-up
CAUTION - Tank and tank compo-
nents should be delimed regularly
depending on local water conditions.
Excessive mineral build-up on stain-
less steel surfaces can initiate cor-
rosive reactions resulting in serious
leaks.
1. Strainer/flow control (.750 GPM)
2. Improper water pressure
Page 11
Remedy
Refer to Service - Relay for testing
procedures. See page 34
Refer to Service - ON/OFF switch for
testing procedures. See page 32
Refer to Service - Warmer element
for testing procedures. See page 44
Refer to Service - Control thermo-
stat for testing procedures. See page
20
Refer to Service - Control assembly
for testing procedures. See page 23
thru 28
Refer to Service - Triac assembly for
testing procedures. See page 23 thru
28
Inspect the tank assembly for exces-
sive lime deposits. Delime as re-
quired.
(A) Direction of flow arrow must be
pointing towards the brewer.
(B) Remove the strainer/flow con-
trol 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) .
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