Critical Error Messages - Keurig B3000 Use & Care Manual

CRITICAL ERROR MESSAGES:

Error # Meaning/Likely Causes
1 Brew Tank TCO is Open
(no Heater on brew tank):
Likely Causes: Draining and forgetting to refill.
Or Bad Triac.
2 Preheat Tank TCO is Open
(no Heater on preheat tank):
Likely Causes: Draining and forgetting to refill.
Or Bad Triac.
3 Brewer must be descaled now:
3 dispense cycles in a row exceed the Dispense
Timeout Limit minus 5 seconds, followed by one
brew that causes a dispense timeout. This error
message lets the user know damage may occur if
they do not descale now.
4 The float switch not sensed high while the CWT
inlet valve is open and a time limit is exceeded.
Likely Causes: Inlet water disconnected.
Or low water pressure. Or Inlet Valve not opening.
Or CWT level sensor stuck low. Or Leaks
5 The float switch not sensed low during a brew cycle. RUNAWAY FILL
The inlet valve might be stuck open, and the Float
Switch is now preventing flooding.
Likely Causes: Leaky/Stuck Inlet Valve.
Or CWT level sensor stuck high.
6 The Preheat Tank thermistor is reading <37°F. Heater PREHEAT TANK COLD
will not be turned on until it reads above this
threshold to protect against damage.
Likely Causes: Brewer just stored at cold temperature.
Or bad Thermistor.
7 Same as above for Brew Tank
8 Thermistor in the Preheat Tank is reading > 240°F
Likely Causes: Problems with thermistor.
Or heater triac,
9 Same as above for Brew Tank
16
Menu text
BREW TCO OPEN
HWT DRAINED
MODULES: POWER, HWT
PREHEAT TCO OPEN
HWT DRAINED
MODULES: POWER, HWT
DESCALE REQUIRED
CHECK WATER SUPPLY
MODULES: POWER, CWT
MODULES: POWER, CWT
MODULE: HWT
BREW TANK COLD
MODULE: HWT
MODULES: HWT, POWER
MODULES: HWT, POWER