Bunn Single SH Testing Individual Components

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Equipment will not operate.
Brew cycle will not start.
Automatic refill will not operate or
display shows FILL TIME TOO LONG
1. No power or incorrect voltage.
1. No water
2. ON/OFF switch
3. Brew switch
4. Brew Valve
5. Electronic Control Board
1. No water
2. Water strainer/flow control
(.750 GPM)
Measure the voltage at the terminal
block and confirm that it matches
the voltage specified on the brewer
data plate within +/- 10%.
Check plumbing and shut-off valves
Test the ON/OFF switch. Refer to the
switch test procedures on page 32.
Test the BREW switch. Refer to the
switch test procedures on page 32.
Test the Brew valve. Refer to Testing
Individual Components on page 32.
Substitute a control board known to
be in good working order.
Check plumbing and shut-off valves.
(A) Direction of flow arrow must be
pointing towards direction of water
flow.
(B) Remove the strainer/flow con-
trol and check for obstructions. Clear
or replace.
TROUBLESHOOTING (cont.)
Troubleshooting Procedure
Problem Possible Cause