Error code What has happened Possible cause Where to find the cause
21
The water circuit is interrupted
The alarm can be reset by
switching the machine off
The machine does not detect the
water flow in the circuit
The sensor of the water level is
broken
The sensor of the turbine is
broken
The pipe of the water circuit is
interrupted, clogged or discon-
nected
The brew unit is occluded
The solenoid valve is occluded or
broken
The pump is broken or interrupted
The thermal switch of the pump
is off
The boiler is occluded
The Power board (TRIAC) is
broken
Command from CPU board
27 Alarm of the water circuit
The water flow in the hydraulic
circuit is blocked
- Check the clogs
- Check the water level
- Check the operation of the
water level sensor
- Check the turbine operation
51 Short circuit of the sensor
Short circuit of the temperature
sensor
Check the temperature sensor
31
Manual code 10083445 / Rel. 0.00 / April 2010
Maintenance manual for technical assistance LB 2300-2301-2302-2311-2312
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