Troubleshooting - La Marzocco GS/3 Owner's Manual

• This espresso machine is equipped with several feedback mechanisms that alert the operator when an unusual condition occurs.
Additionally the espresso machine will warn the operator when certain parameters fall below or above the programmed point.
These errors and warnings will appear as a message in the display.
• The following section will describe errors and warnings that may appear in the display.
Message Description
This message is displayed when the CPU does not
Corrupted
understand an instruction.
Data
This message is displayed when the CPU does not
Filling-up T-out
detect a full signal from the steam boiler within a set
Alarm
time interval.
This message is displayed when the CPU does not
T.Probe Unconnect
receive any signal from the Safety Probe in the steam
Boiler temp.
boiler.
This message is displayed when the CPU does not
receive the appropriate signal from the flowmeter. This
Flowmeter
message is not active in MP machines.
Alarm

Troubleshooting

Message Solution
Most likely the machine power was disconnected without first turning off the machine through the keypad
and display. Turn off machine using main switch. This should clear the error.
When this message is displayed the CPU also shuts down and turns the machine off. Water is not entering
the boiler. Call an authorized service technician to repair this fault.
When this message is displayed the CPU turns off power to the steam boiler heating element. The only way
to reset this error is to repair the Safety Probe to restore the signal to the CPU.
When flowmeter alarm is displayed, the light on the button that initiated the brew cycle will begin to flash.
This problem is a result of water not flowing through the flow meter. This can be caused by coffee ground too
fine or packed too tightly (try a coarser grind or lighter tamping) or a blockage in the tubes, a malfunctioning
water pump, a faulty valve, or a damaged flowmeter. Call a service technician to fix this problem.
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