Bunn TWF-EZ - Manual (Page 9)

Page 9
TROUBLESHOOTING (cont.)
BREW CIRCUIT
PROBLEM PROBABLE CAUSE REMEDY
Ready Light Flashing
Brew cycle will not start
1. Brewer has shut down due to
malfunction.
1. No water
2. No power or incorrect voltage to
the brewer
3. TEA/OFF/COFFEE Switch
4. Start Switch
5. Low water temperature (Brew
lockout is enabled)
6. Brew solenoid valves
7. Control Board
Refer to Diagnostic Chart on page
14.
Water lines and valves to the brewer
must be open.
Check for voltage across the black
and white terminals at the terminal
block.
a) Check Switch position, confirm-
ing that it is in either "TEA" or "COF-
FEE" position
b) Refer to Service - TEA/OFF/COF-
FEE Switch for testing procedures.
See page 20
Refer to Service - Start Switch for
testing procedures. See page 21
Allow brewer to heat until ready
lamp is lit, or disable the brew lock-
out feature. See page 7
Refer to Service - Brew Solenoid
Valves for testing procedures. See
pages 16 or 17
Attach a voltmeter to terminals J1-
1 & J1-7 of the control board. Con-
nect the brewer to the power
source. Voltage should be present.
Disconnect the brewer from the
power source. Attach a voltmeter
to terminals J1-1 and J1-8. Recon-
nect the brewer to the power
source. With the TEA/OFF/COFFEE
switch in the "TEA" and/or "COFFEE"
position, voltage should be present.
It should not be present in the "OFF"
position. If these readings are not
correct, replace the control board
assembly. See page 25
29466 082200