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Trouble Shooting Commercial Espresso

 

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THE MACHINE DOESN'T WORK

SYMPTOM : No Power
• check the main electricity supply : SOLUTION = Reset power
• check electrical connections : SOLUTION = Repair or replace the connection
• check the central unit power supply fuse : SOLUTION = Replace the fuse
• check the on/off switch and the electronic card : SOLUTION= Replace the switch of the electronic card.
• check the electronics control unit : SOLUTION= Check the electronic control unit.

MACHINE DOES NOT HEAT OR IS NOT PRESSURISED
• SYMPTOM : Heating Element (Resistor) Not Powered
• check the correct voltage of the resistor : SOLUTION = Reset power
• if the voltage is correct,check the exact polarity on the leads of the resistor : SOLUTION = Replace the resistor.
• check the electrical contacts : SOLUTION = Repair or replace the contacts.
• reset and check that the safety thermostat is powered : SOLUTION = Replace the safety thermostat.
• make sure that the pressure switch is powered : SOLUTION = Replace the thermostat.
• where envisaged,make sure that the power relay is powered : SOLUTION = Replace the relay
• incorrect boiler pressure readout ( no steam ) : SOLUTION = Check the anti-vacuum system,replace as required.
• check the main water supply : SOLUTION = Reset water
• make sure the inlet valve is open : SOLUTION = Open the inlet valve
• check the self-leveling function : SOLUTION = Replace the self-leveling probe
• make sure that the self-leveling probe is powered and that the internal piston is not obstructed : SOLUTION = If not, make sure that the appropriate fuse in the main control unit is working properly, otherwise replace.
• check the retainer valve : SOLUTION = Clean the valve and replace the seal.
• SYMPTOM : Too Much Water In The Boiler.
• check the auto-level solenoid for leaks : SOLUTION = Replace the auto-level solenoid
• check the auto-level solenoid voltage : SOLUTION = If not working correctly' replace it. If it is working, check ( clean ) the auto-level probe.Check the control unit.
• check the manual filling valve for leaks : SOLUTION = Replace the valve
• check the heat exchanger for leaks : SOLUTION = Replace the boiler
• check the auto-level valve : SOLUTION = Replace the self-leveling probe.

 

 NO WATER DELIVERY THROUGH THE SUPPLY UNIT
• SYMPTOM : Loss Of Water
• check the main water supply : SOLUTION = Reset water
• make sure the inlet valve is open : SOLUTION = Open the water inlet valve
• SYMPTOM : Loss Of Power In The Supply Circuit
• make sure that the 3-way solenoid is powered
• check the supply circuit button : SOLUTION = Replace the main electronic card or the " dashboard " card.
• SYMPTOM : Physical Blockage ( Caused By Deposits Or Unusual )
• check girl clamping : SOLUTION = Check girl clamping
• check the 3-way solenoid support clamping : SOLUTION = Clean or replace it
• check the 3-way solenoid clamping : SOLUTION = Clean or replace it
• check the connection holes between the sprays and the pre-infusion chamber, the 3-way valve and the gigleur : SOLUTION = Clean
• check the secondary retainer valve in the coffee circuit : SOLUTION = Replace it
• check the heat exchanger clamping : SOLUTION = Clean it
• check the doser-gigleur clamping : SOLUTION = Clean or replace it
• SYMPTOM : Pump
• make sure that pressure is correct ( 7-9 bar ) : SOLUTION = Replace the pump
• check pump rotation : SOLUTION = Release or replace it
• make sure the motor is powered :

INCONSISTENT COFFEE DELIVERY
• SYMPTOM : Continuous Delivery
• check the electrical connections of the doser : SOLUTION = Clean and reconnect or Replace the doser. If the doser causes impulses, replace the electronic control card.
• SYMPTOM : Inconsistent Delivery ( Long )
• make sure that the doser generates impulses : SOLUTION = Replace the doser. If the doser causes impulses, replace the electronic card.
• SYMPTOM : Inconsistent Supply ( Short )
• check the expansion valve ( neplax ) for leaks through the supply unit during delivery : SOLUTION = Remove, clean or replace the gasket.
• check the 3-way valve for leaks through the supply unit during delivery : SOLUTION = Replace the 3-way solenoid.
• check the retainer valve : SOLUTION = Clean or replace the gasket.
• SYMPTOM : Too Slow
• sprays blocked : SOLUTION = Replace them
• coffee too light in color : SOLUTION = Adjust the grinding ( grinder doser ).
• gigleur clogged : SOLUTION = Clean or replace it
• pump pressure too low  : SOLUTION = Adjust pump pressure ( 7-9 bar ) . Replace the pump.
• check the heat exchanger , the pipes and the gigleur for obstructions : SOLUTION = Change the pipes, clean the heat exchanger with acid, clean the unit, check the function of the water depurator.
• SYMPTOM : Too Fast
• coffee doses to small : SOLUTION = Adjust the coffee dose
• grinding to large : SOLUTION = Adjust the setting of the grinder-doser
• pump pressure too high : SOLUTION = Adjust pump pressure ( 7-9 bar ). Replace the pump
• SYMPTOM : Leaks Around The Filter-Holder
• check underneath the sheath of the filter : SOLUTION = Replace it
• check the edge of the filter : SOLUTION = Replace it

 

STEAM VALVE
• SYMPTOM : Loss Of Steam
• check the valve casings : SOLUTION = Clean the valves and replace the sheaths.
• SYMPTOM : No Steam
• check the steam sprayers : SOLUTIONS = Clean or replace them. ALSO SEE:    ( machine does not heat or is not pressurized ).
HOT WATER VALVE
• SYMPTOM : Loss Of Water ( Manual )
• check the valve seals : SOLUTION = Clean the valves and replace the seals.
• SYMPTOM : Loss Of Water ( Automatic )
• check the solenoid voltage.                                  
• SYMPTOM : No Water ( Automatic )
• check the solenoid voltage
• SYMPTOM : No Water - Only Steam
• check the water level in the boiler : SOLUTION = ALSO SEE : " ( Machine does not heat or is not pressurized )" and " ( Water leaks ) "

WET COFFEE GROUNDS ( AFTER DELIVERY )
• SYMPTOM : Delivery Water To Cold
• check the water economy valve , if fitted : SOLUTION = Adjust the flow using the knob. Replace it
• SYMPTOM : Water Leaks From The Coffee Grounds In The Filter-Holder After Infusion
• check the position of the blower ( Mac Cup & Program ) : SOLUTION = Fit the blower correctly
• check the 3-way solenoid discharge : SOLUTION = Clean or replace it
• check the pipe routing from the sprayers to the 3-way solenoid : SOLUTION = Clean
• check the temperature of the unit ( external 80-85 degrees C )
• check the coffee dose : SOLUTION = Adjust the coffee dose ( grinder-doser )
• check the coffee grinding : SOLUTION = Adjust the setting of the grinder-doser
• check the coffee pressing : SOLUTION = Inform the user about the correct pressure of the coffee dose

 

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