Chapter 4 Fault diagnosis
SMSO-2-02.04- 15.07.03 97
Program flow malfunction
System / component Possible cause Remedy
Power supply line
No mains voltage Check the mains connection (see “con-
trol system diagram, mains connection”)
Power PCB Voltage supply (fuses F1 or F3 defec-
tive)
Power PCB defective
(voltage stabilising circuit defective)
replace (see “Maintenance, Power
PCB”)
replace (see spare parts catalogue)
replace (see spare parts catalogue)
Unit control system defective replace (see “Maintenance, unit control
system”)
Cabling Power PCB cable (X33) – to unit control
system (X13) is interrupted (not correctly
plugged)
Switch off the machine, check or make
the PCB connection at zero current,
switch on the machine, and restart the
program
Program permanently resets Short circuit in the 24V circuit
Compaction current (compaction pres-
sure) for brewing unit programmed too
high (see display message: “Motor cur-
rent”)
Check the voltage supply (see “control
system diagram, Power PCB”)
Correct the programming (see pro-
gramming instructions)
Machine or installation number not pro-
grammed
Enter the correct machine or installation
number. If no special installation number
exists, then the machine number is the
same as the installation number.
RAM (settings memory) Loss of data / defective (display mes-
sage “select product” but serving cannot
be made)
Reload the machine settings from the
“SAVE DATA” card. Switch off the ma-
chine and then switch it back on.
Brewing unit
Position switch
Micro switch for initial setting defective
(message on display “motor current”)
Check the function and setting of the
position switch (see
Maintenance, replace / set micro switch”
and “control system diagram, limit
switch for brewing unit initial setting)
Operating error Incorrect operations (program hanging) Switch off the machine and then switch it
back on.
Programming not possible/ card reader
System / component Possible cause Remedy
Card reader defective replace (see spare parts catalogue)
Cabling Cable between operator PCB and card
reader is completely or partially broken,
or incorrectly plugged.
Check correct plug and cable configura-
tion to the unit control system and to the
keyboard PCB, according to the control
system diagram.
Unit control system / operator
PCB
defective replace (see “Maintenance, unit control
system” and spare parts catalogue)
PIN-code incorrect or “Zero” (=not entered) Enter the correct PIN-code
Service card incorrect country code The country code can be corrected with
the “PROGRAM” card
Operator cards not enabled Correct the programming (see pro-
gramming instructions)
Machine is in cleaning mode Allow the cleaning cycle to run to its
conclusion
To Next Page
Loading...
Need help?
General
