Bunn TWIN APS, Operating & Service Manual, Page: 13 / 32

Page 13
TROUBLESHOOTING (cont.)
PROBABLE CAUSE
REMEDY
HEATING CIRCUIT
PROBLEM
1. Display flashing
2. Water not touching tempera-
ture probe
3. Dry Plug In Probe Sensing Sys-
tem
Brewer has shut down due to
malfunction (See Diagnostic
Chart in manual, Page 20, or
under top lid).
Remove probe and grommet. Look
into hole on tank lid. Water must
be within one inch from top of
tank.
Disconnect the brewer from the
power source. Disconnect the J3
connector from the control board.
Check for continuity from the tank
mounting screw where the green
wire mounts, to pin 2 of the plug,
continuity should be present. Pull
the temperature probe up about
an inch from the grommet. Check
for continuity from the outside
surface of the temperature probe
and pin 4 of the plug, continuity
should be present. Connect the J3
plug to the control board and pro-
ceed to step 4.
Water does not heat to proper
temperature
IMPORTANT: Make sure no tem-
perature tests are taken before the
ready light is "ON". Tank tempera-
ture must be stabilized before read-
ings are taken.
36672 030104