Bunn Single SH Operating And Service Manual page 10

TROUBLESHOOTING (cont.)
Problem
Beverage level will not adjust (Selec-
tor switch in any position)
Water flows into tank continuously
(ON/OFF Switch "ON")
Water flows into tank continuously
(ON/OFF Switch "OFF")
Water from tank is not hot
Spitting or unusual steaming from
sprayhead or airvent.
All manuals and user guides at all-guides.com
Probable Cause
1. Brew selector switch
1. Timer
1. Level control board and level probe
2. Overflow protection switch
3. Solenoid valve
1. Limit thermostat
CAUTION - Do not eliminate or by-
pass limit thermostat. Use only
B.O.M. Part #23717.0001
2. Control thermostat
3. Contactor
4. Tank heater
1. Control thermostat
2. 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.
Page 10
Remedy
Refer to Service - Selector switch for
testing procedures. See page 16
Refer to Service - Timer for testing
procedures. See page 36 & 38
Refer to Service - Level control board
for test procedures. See page 26
Refer to Service - Overflow protec-
tion switch for testing procedures.
See page 25
Refer to Service - Solenoid valve for
testing procedures. See page 32
Refer to Service -Limit thermostat
for testing procedures. See page 19
Refer to Service - Control thermo-
stat for testing procedures. See page
22
Refer to Service - Contactor for test
procedures. See page 20
Refer to Service - Tank heater for
testing procedures. See page 34
Refer to Service - Control thermo-
stat for testing procedures. See page
22
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
28230 092200