Technical Manual V6.00 44 01.05.2017
6. Fault finding
6.1. List of errors
Error - Coffee machine is blocked
RS422 broken link between control board and touch board
Check connection between control board and touch board
Check if control board is running -> LED on board
When leaving <Diagnostic> it may happen that the error
appears shortly – there is no problem
Short circuit +24V AUX trolley
Check 24V AUX and trolley
Check connection between trolley and coffee machine
Check Fuse F1 on the power board
Short circuit +24V valves, brewing group heating element,
milk sensor, air pump, relay milk pump
Check listed elements
Check cables and wiring
Short circuit +5V card reader
Check listed elements
Check cables and wiring
Short circuit cash system
Check listed elements
Check cables and wiring
Short circuit +12V power board
Short circuit heating element relay
Check heating element relay – replace if necessary
Heating element relay interrupted
Check heating element relay and cable – replace if necessary
Overheating coffee boiler
Check temperature sensor of coffee boiler with diagnostic
Check power supply (triac)
Check fuse F10 A + B
Check heater of steam boiler with diagnostic
Check level sensor
Check Steam boiler filling valve
Check pressure on the manometer
Check power supply (triac)
Error during upper piston movement
Check spindle motor with diagnostic – movement, switch function
Brewing unit L61 and former version
Check upper piston shaft
Check also lower piston switch for proper movement
Brewing unit BC18 (18 grams)
Perform brewing group calibration
Error during lower piston movement
Check spindle motor with diagnostic – movement, switch function
Clean lower piston/sieve if dirty (blockage can cause error)
Check thread of lower piston shaft
Brewing unit L61 and former version
Check lower piston shaft
Brewing unit BC18 (18 grams)
Perform brewing group calibration
CCI/CSI link between coffee machine and cash system
interrupted
Check cables and interface
Check connection to control board