temperature probe has experienced a
short circuit.
Probable causes are:
• Group 1 temperature probe is
faulty/damaged
• Group 1 temperature probe connecting
cable has experienced a short circuit
Consequences:
• Boiler is locked. To cancel the alarm,
press the CANC button below the display
ALT GR14 “ABP”
This alarm triggers when group 1
temperature probe reads group
overheating.
Probable causes are:
• Triac board is not working
• Group heating element earth is missing
• Group temperature probe is faulty/
damaged
• Incorrect power connection
Consequences:
• Boiler is locked. To cancel the alarm,
press the CANC button below the display
ALT GR21 “ABP”
ALT GR22 “ABP”
ALT GR23 “ABP”
ALT GR24 “ABP”
These alarms concern group 2.
ALT GR31 “ABP”
ALT GR32 “ABP”
ALT GR33 “ABP”
ALT GR34 “ABP”
These alarms concern group 3.
ALT MK1 “ABP”
This alarm triggers when MCS
temperature probe is interrupted.
Probable causes are:
• MCS temperature probe faulty or
disconnected
Consequences:
• MCS is locked. To cancel the alarm,
press the CANC button below the display
ALT MK2 “ABP”
This alarm triggers when MCS
temperature probe experiences a short
circuit.
Probable causes are:
• MCS temperature probe is faulty/
damaged
• MCS temperature probe connection
cable has experienced a short circuit
Consequences:
• Boiler is locked. To cancel the alarm,
press the CANC button below the display
ALT MK3 “ABP”
This alarm triggers when MCS
temperature probe does not read milk
overheating within 60 seconds.
Probable causes are:
• MCS solenoid valve is locked
Consequences:
• MCS is locked. To cancel the alarm,
press the CANC button below the display
ALC 01
This alarms triggers if the control
system does not receive any impulse
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