Bunn DUAL TM (Serial # DUAL010000 - Up) - Manual (Page 10)

Page 10
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
Remedy
Refer to Service - Relay for testing
procedures. See page 33
Refer to Service - ON/OFF switch for
testing procedures. See page 31
Refer to Service - Warmer element
for testing procedures. See page 43
Refer to Service - Control thermo-
stat for testing procedures. See page
19
Refer to Service - Control assembly
for testing procedures. See page 22
thru 27
Refer to Service - Triac assembly for
testing procedures. See page 26
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) .
27040 032201