Bunn CDBC TWIN Benutzerhandbuch
Page 21
DIAGNOSTICS
Intermittent flashing of the READY indicator (Model CEZ) or the bank of temperature indicators (Model CDBC)
indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to
investigating the fault.
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
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 (CEZ boards only). See page 7
Level probe wiring
Temperature probe wiring
Fill valve wiring, function, & strainer
on correct set of pins (CEZ boards only). 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
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
29319 091203