Bunn TU3Q-EZ - Manual (Page 13)

Page 13
DIAGNOSTICS
Intermittent flashing of the READY indicator indicates that a fault exists. Count the number of flashes between
pauses and use this chart as a guide to investigating the fault.
FLASHES CAUSE THINGS TO CHECK
1 Dry Plug - In Fault - Water Pressure (Is water shut off?)
Sheath of temperature probe dry for 10 minutes after power-up Temperature probe wiring
Fill valve wiring, function, & strainer
Green wire between tank and circuit board
2 Low Tank Level Fault - Water pressure (Is water shut off?)
Level probe dry for 7 minutes after fill valve is energized Shorting pin on J6 connector of control board
not on correct set of pins (See page 7)
Level probe wiring
Temperature probe wiring
Fill valve wiring, function, & strainer
3 Low Water Temperature Fault - Tank heater wiring & function
Sensor in tank is calling for heat for 30 minutes or more Temperature probe wiring
4 Tank Sensor Disagreement - Temperature probe wiring
Level probe detects water, but dry plug-in probe dry Level probe wiring
Green wire between tank and circuit board
5 Temp Sensor Out-of-Range - High Sensor not connected to circuit board
6 Temp Sensor Out-of-Range - Low Sensor wires shorted together or to chassis
29460 061599