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Table of Contents
Related Manuals for Electrolux UNIC AURA
Summary of Contents for Electrolux UNIC AURA
- Page 1 Programming Maintenance Troubleshooting July 2021...
- Page 2 https://www.unic-usa.com/en_US/service-center/technical-center...
- Page 3 Topics: Programming Sections Maintenance Components Troubleshooting Fault Codes...
- Page 4 All Programming Sections Hot Water Dose Coffee Doses Chronometer SteamAir Steam Pressure Pre-Infusion Payment System Cleaning Doseamat Keypad Sensitivity Lighting LEDs Continuous/Stop Cup Warmer Barista Rinse...
- Page 5 Key Programming Sections Hot Water Dose ml Coffee Doses Chronometer SteamAir Steam Pressure Pre-Infusion Payment System Cleaning Doseamat Lighting LEDs Continuous/Stop Keypad Sensitivity Cup Warmer Barista Rinse...
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Page 6: Enter Programming
Enter Programming There are 2 steps to unlock the Programming Mode Programming Mode: Display: Pro Display: do (dose) Press the cleaning and Press & Hold the GEAR button First item in the for 3 seconds continuous buttons programming list Press & hold the continuous button first, then the cleaning button Hold both for 3 seconds... - Page 7 Programming Programming gear to scroll through list...
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Page 8: Programming Options
Programming Options Scroll Through list Select Function Toggle Settings: OFF/ON Enter sub-Menu Change Value: + /-... - Page 9 Adjust Steam Pressure When “ON” Press Stars to enter Programming Scroll to Pressure and 1 . 1 Toggle between press Stars to enter OFF & ON if needed Normal setting is ON Adjust bar setting Press & Hold the GEAR button on with lower keys G1 for 3 seconds to Save and Exit...
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Page 10: Led Lights
LED Lights Scroll through colors with lower keys Scroll to EcL and press stars key... -
Page 11: Cleaning Prompt
Cleaning Prompt... - Page 12 Chronometer (timer)
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Page 13: Maintenance
Maintenance... - Page 17 Change Group Gasket Remove Group Cover Remove Both Screws Lower Cover Unplug connector Careful! Don’t pull wires...
- Page 18 Change Group Gasket Easy-Lock Spring Easy-Lock O-ring Group Gasket Holder Group O-ring Group Gasket (Group Compactor) Water Diffuser Group Screen...
- Page 19 Change Group Gasket Remove Screen & Diffuser Remove Locking Collar...
- Page 20 Change Group Gasket...
- Page 21 Change Group Gasket Remove Old Group Gasket & inner O-ring Clean group Soak Removed parts in Cleaner...
- Page 22 Change Group Gasket Appy a thin coat of Silicone grease to Gasket & O-rings Do Not place Install Group O-ring on O-ring into gasket group first ! Holder!
- Page 23 Change Group Gasket Assemble parts as shown Easy-Lock spring Do Not install group gasket at this time! Gently lift & Hold into place while installing screws Take care that the Group O-ring does not shift!
- Page 24 Change Group Gasket Install New Group Install New Group Gently push Gasket in Gasket O-ring Gasket place Do Not push all the way in yet!
- Page 25 Change Group Gasket Use a Porta-filter to seat the Group Gasket Install Locking Collar Place Porta-filter in Tighten screws to seat Insert screws only 1-2 Collar gasket evenly turns by hand...
- Page 26 Change Group Gasket Do Not over tighten Diffuser Disk notch side screw down Fingertip tight only!
- Page 27 Change Steam Wand O-rings...
- Page 28 Change Steam Valve Cartridge...
- Page 29 Change Steam Valve Cartridge...
- Page 30 Components...
- Page 31 Hydraulic Diagram...
- Page 32 Pump Pressure Adjustment Screw...
- Page 33 Flowmeter Flowmeter Sensor Cap LED shows the output signal pulses O-ring Impeller with magnets...
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Page 34: Solid State Relays
Solid State Relays 12 Volt dc signal from CPU LED signal indicator Element Supply ON Heating... - Page 35 High Limit Safety Element Supply...
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Page 36: Inlet Manifold
Inlet manifold 1. Check Valve 2. Expansion Valve (HP) Valve 3. Filling Valve Water from Pump... - Page 37 Expansion Valve Function Check Valve keeps hot water out Expansion Valve set to 13 bar of pump...
- Page 38 Steam Safety (OPV) LP Valve Pre-set at 3 bar...
- Page 39 Vacuum Break Valve...
- Page 40 Vacuum Break Valve Allows air into the boiler to prevent a vacuum from forming when the machine cools off --------Vacuum-------- Protects the seals and reduces the possibility of contaminants (milk etc.) entering boiler...
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Page 41: Remove Group
Remove Group Unplug Brew Valve Remove group nuts Disconnect exhaust tube (17mm) - Page 42 Remove Group Use a porta-filter to Always replace PE-28 O-ring remove group use Molykote grease...
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Page 43: Heat Exchanger
Heat Exchanger Turn water back on to flush heat exchanger... - Page 44 Gicleur (Water flow Metering Jet) Remove with 21mm socket Jet is 0.7mm Replace entire assembly Screen keeps scale particles #23127 out of jet...
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Page 45: Brew Valve
Brew Valve Brew Valve without coil Clean plunger if jammed O-rings are included with #PI-45X with coffee residue Valve... -
Page 46: Troubleshooting
Troubleshooting... -
Page 47: Start Heating
Start Heating ON Heating Element 3 Elements 1 & 2 Boiler should start Steam Pressure Check for power to all 3 getting warm elements with an ammeter starts to climb... - Page 48 Low Volume/Slow water flow from group Water Flow Test (Water Debit) 200ml Normal flow is 200ml in 20 seconds...
- Page 49 Low Volume/Slow water flow from group #1 Service Normal flow is 10ml/second: Problem! 1. 9 bar brew pressure 2. 0.7m metering jet 3. Brew valve Probable Causes: 1. Clogged brew Valve Cleaning 2. Restricted 0.7m metering jet Water Scale 125ml 3.
- Page 50 Low Volume/Slow water flow from group Ensure pump is running and set to 9 bars Brew Valve 0.7mm Metering Jet Flowmeter Coffee Residue Scale Water Debris/ Plumbers Tape...
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Page 51: Fault Codes
Fault Codes... - Page 52 Fault Codes – Steam/Hot water Box Codes do not re-set until Hot Water Flowmeter switched OFF/ON Hot Water dosing set to ON in programming (even if problem is resolved) Set to OFF if no hot water flowmeter Normal Operation SteamAir Switched OFF Flowmeter Programming section: StA = OFF SteamAir button works by time...
- Page 53 Fault Codes - Group Boxes Codes do not re-set until switched OFF/ON (even if problem is resolved) Flowmeter Filling Heating Flowmeter Dosamat Filling Flowmeter Dosamat Transducer Flowmeter SteamAir Transducer...
- Page 54 Flowmeter Codes Group Harness for Groups G1, G2, or G3 Flowmeter Disconnected plug into CN8, CN9, or CN10 Flowmeter Short Circuit Usually Corrosion on plug or water leak Electric? or Water Flow? Stuck Impeller or corroded magnets No signal Replace impeller & clean flowmeter body Flowmeter works See Water Flow Test Section Dose timeout...
- Page 55 Filling Codes Normal Filling Flashes once on startup to verify boiler is full Flashes after 3 minutes without filling (boiler cold) Boiler heating disabled Steady after 105 seconds without filling (boiler hot) Steam/Hot water box disabled to prevent draining boiler...
- Page 56 Boiler Pressure Sensor Codes Steam Pressure Sensor Disconnected (Plug CN16) Steam Pressure Sensor Short Circuit Wiring Short Circuit CN16 Red, Brown, & Black wires from probe...
- Page 57 Boiler Heating Code No Heating Sensor wires monitor the High Limit Switch Tripped High Limit Voltage across closed High Limit = 0 volts Voltage across tripped High Limit = 220 volts Sensor wires from High limit connect to CN2 High Limit re-set High Limit can only be re-set 3-4 times! Replace if frequently tripping under normal conditions...
- Page 58 Boiler Heating Code No Heating Causes of Tripped High Limit: Tripped High Limit Overuse of Hot water Wand: Slow boiler re-filling: It is possible to take hot water out Clogged water filters of the boiler faster than it can refill Reduced water flow to the machine Be sure screw on filling valve is open 3 turns...
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Page 59: Other Codes
Other Codes Dosamat Sensor Disconnected Turn OFF Dosamat ( ) in programming if not installed Dosamat Sensor Short Circuit... - Page 60 Keypad Buttons Don’t Respond (Usually When Entering Programming) Clean keyboard glass Switch the machine Cover the keys fully Make sure the with window cleaner OFF and ON. This re- with your fingertips Protective film is calibrates the peeled from the capacitive buttons.
- Page 61 Not Heating Screen Dashes Turn Power Switch LED lighted on SSRs cycling to heating position “2” to close heating 12-volt sent signal to Element circuit Solid Stare Relays in Switch position 1 & 2...
- Page 62 Not Heating (All other functions work normally) Screen in ready mode Steady lines No 12-volt signal to Pressure control may be set to OFF Solid Stare Relays LED not lighted on SSRs Enable by switching to ON and adjusting pressure (See Manual)
- Page 63 https://www.unic-usa.com/en_US/service-center/technical-center...