Bunn FMD-4 Beverage Dispenser User Manual


 
8
TROUBLESHOOTING (cont.)
PROBLEM
Water is not hot (Cont.)
Spitting or excessive steaming
Dripping from dispense tip
Water flows into tank continuously
PROBABLE CAUSE
4. Tank Heater Switch
5. Heater Relay
6. Control Board
1. 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.
2. Control Thermostat
1. 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.
2. Dispense Solenoid Valve
1. Control Board
2. Solenoid Valve (Inlet)
REMEDY
Refer to Service - Tank Heater Switch
for testing procedures. See page
52
Refer to Service - Heater Relay for
testing procedures. See page 51
Refer to Service - Control Board for
testing procedures. See page 20
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
Refer to Service - Control Thermo-
stat for testing procedures. See
page 26
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
Remove the dispense solenoid valve
and clear any obstructions. Rebuild
or replace the valve if necessary. See
page 47
Refer to Service - Control Board and
Probe for testing procedures. See
page 20
Refer to Service - Solenoid Valve
(Inlet) for testing procedures. See
page 49
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