Koro/Korinto Troubleshooting Guide
| Problem (or indication on the display) | Possible cause | Solution (Check the following situations)
|
“Water Failure” | If the micro switch of the air-break float in the instant boiler or the float of the water supply tank, is not activated within one minute, the software disabled the machine. | with air-break : check if there is water coming from the mains; if this is the issue, wait for the mains to be resumed. Check the operation of the inlet solenoid valve. Check the operation of the air-break micro switch. Instant Boiler: in this case it is the boiler to perform the air-break. Then repeat above checks. With water supply tank: check the magnetic float and pump. |
“No Coffee” | If the grinder exceeds the grinding speed for more than 5 seconds, the coffee selection will be disabled. | Check the presence of coffee Check the distance between the grinding Check the presence of the sensor Check the functioning of the relay K16 |
“Waste Container full” | When the float in the liquid waste tray triggers the signal micro-switch | Empty the tray Check function of float and switch |
“Air-break” | The machine locks after 10 selections the float micro-switch does not change position. | Follow “water failures” |
“Volumetric counter” | When the counter does not signal any counting with-in a time-out set by default. | Check there is water Check the correct functioning of the impeller Check that coffee was ground correctly and that the dose is accurate. Check the coffee filters are not clogged |
“Boiler” | The machine will lock if there is no signal of correctly reaching the temperature set in the software | Check that the heating element and the STRC card are functioning. Check that the overheating control system was not triggered. Check the probe (ohm control) |
“CAN-BUS board” | Failed dialogue between the CPU and the can-bus board that controls the SIGMA BREWER unit. | Check connections Check that the power supply is correct. Replace board. |
“Grinder blocked” | If the grinder exceeds the grinding speed for more than 5 seconds, the coffee selection will be disabled. | Check for blockages Check that the overheating control system on the winding was not triggered. Check the sensor works correctly Check the activation of relay K7 |
“Espresso unit” Or “ES out of use” | If the unit does not reach its initial stand by position the espresso selections will be disabled. | Turn off and on to restart. If continues, check: the motor Check that the chamber is not clogged with too much coffee. Check switch Check the activation of relay K7 |
“RAM data” | One or more areas of the RAM memory contains altered or non-compatible data. | Enter into the installation procedure and initialise the software. If continues replace CPU board. |
“Fresh-brewer piston” | Default position is determined by the micro switch. | Check the motor has started Check the brewer chamber and filter is not clogged. Check the connection with the FB board |
“Fresh-brewer brush”
| Default position is determined by the micro switch. | Check that the brush is new and the motor is activated. Check that there is no mechanical blockage Check the connection with the FB board. |
Espresso only: coffee is dispensed too slowly and it tastes burnt | Excessive coffee dose or ground too finely. | Check that the distance between the grinding wheels is the factory default one. |
“Machine not in service” | Turn off the power, unplug and leave for 5 minutes. Make sure everything is in the correct location, cleaned and in good condition. Switch back on, the machine will now flag up the error code. Check above errors. | |
“Grounds bin full” | This occurs after every 25 drinks has been dispensed | Pull out the drip tray without opening the door. Empty, rinse, dry and replace. |
