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Service Manual EF 473 / EF 474 enVersion 1.0
Contents
Preface _____________________________ 3
Main Components__________________ 4
Overview ___________________________ 4
Overview of rating plates ______________ 5
Water circuit _________________________ 6
Technical data _______________________ 7
Operation___________________________ 8
Preparation _________________________ 8
Fill water system _____________________ 9
Making coffee ______________________ 10
Programming _______________________ 11
Reset to factory settings______________ 12
Empty water system _________________ 13
Coffee machine status _______________ 14
Troubleshooting___________________ 15
Checking the machine on receipt ______ 15
Repair _____________________________ 17
General disassembly ________________ 17
Replacing thermoblock and NTC ______ 18
Replacing flow meter and On/Off switch 19
Replacing pump ____________________ 20
Replacing electronic control board with
button prints ________________________ 21
Replacing compact brewing unit (CBU) _22
Electronic control board, wiring diagram -
Europe (230V / 50 Hz) _______________ 23
Electronic control board, wiring diagram -
USA (UL, 120 V / 60 Hz) _____________ 24
Electronic control board, wiring diagram -
Japan (100 V / 50-60 Hz)_____________ 25
Descaling (1) _______________________ 26
Descaling (2) _______________________ 27
Measuring flow rate _________________ 28
Checking for leaks and pump
pressure (1) ________________________ 29
Checking for leaks and pump
pressure (2) ________________________ 30
Measuring coffee temperature ________ 31
Daily care and final cleaning __________ 32
Spare Parts ________________________ 33
Repair accessories __________________ 33
Spare parts EF 473__________________ 34
Spare parts EF 474__________________ 36
Notes ______________________________ 38