Bunn FMD-4 User Manual

Page 10

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. Relay (120V versions only)

6. Control Board #2 (120V versions
only)

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 corro-
sive reactions resulting in serious
leaks.

2. Control Thermostat

2. Dispense Solenoid Valve

1. Control Board #1 and Probe

2. Solenoid Valve (Inlet)

REMEDY

Refer to

Service

- Tank Heater Switch

for testing procedures. See page 39

Refer to

Service

- Relay for testing

procedures. See page 40

Refer to

Service

- Control Board #2

for testing procedures. See page 22

Inspect the tank assembly for exces-
sive lime deposits. Delime as re-
quired.

Refer to

Service

- Control Thermo-

stat for testing procedures. See
page 19

Inspect the tank assembly for exces-
sive lime deposits. Delime as re-
quired.

Remove the dispense solenoid valve
and clear any obstructions. Rebuild
or replace the valve if necessary. See
page 35

Refer to

Service -

Control Board and

Probe for testing procedures. See
page 20

Refer to

Service

- Solenoid Valve

(Inlet) for testing procedures. See
page 37

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