Page 2 M.Schaerer Ltd. Phone: +41 31 858 51 11 Service manual Gewerbestrasse 15 Fax: +41 31 858 51 40 SMSO 2 - 02 3302 Moosseedorf E-Mail: info@schaerer.com Switzerland Internet: www.schaerer.com Order number: 020'731...
Page 3 Systeme zu reflect the latest factual position at the techniques et illustrations de ce mode übertragen. time of going to print. M. SCHAERER d’emploi reposent sur les dernières Alle in dieser Anleitung aufgeführten Ltd. reserves the right to introduce...
Page 5: Table Of Contents
Table of Contents Table of Content Safety Regulations......................5 General .....................................5 1.1.1 Hazard labels ..................................5 1.1.2 Training for operating personnel and service technicians ....................5 1.1.3 Designated use .................................5 1.1.4 Safety equipment ................................5 1.1.5 General safety regulations ..............................5 Electronic regulations................................7 1.2.1 General .....................................7 1.2.2 Checking electrical circuits..............................7...
Page 6 Table of Contents 3.2.1 General ..................................32 3.2.2 Programming.................................. 32 3.2.3 ESD protection (electro static discharge) ........................32 3.2.4 Lubricant ..................................32 3.2.5 Grinder ................................... 33 3.2.6 Brewing unit ................................... 35 3.2.7 Rotary-vane type pump..............................39 3.2.8 Flow meter ..................................41 3.2.9 Non-return valve................................
Page 7 Table of Contents 5.4.7 Brewing unit ..................................138 5.4.8 Brewing unit piston motor .............................141 5.4.9 Rotary-vane type pump..............................143 5.4.10 Distributor cabinet .................................145 5.4.11 Flowmeter ..................................147 5.4.12 Instant heater coffee ..............................148 5.4.13 Instant heater coffee (Booster) .............................150 5.4.14 Instant heater tea ................................152 5.4.15 Instant heater tea (Booster) ............................154 5.4.16...
Page 8 Table of Contents 6.5.33 Refrigerator, cooling unit motor ............................ 221 6.5.34 Refrigerator, foamer head limit switch.......................... 222 6.5.35 Refrigerator, solenoid valve for squeeze cylinder......................223 6.5.36 Refrigerator, solenoid valve for squeeze cylinder (Hotflush) ..................224 6.5.37 Refrigerator, ventilation valve............................225 6.5.38 Refrigerator, rinsing valve –...
Page 9: Safety Regulations
Chapter 1 Safety regulations Safety Regulations General 1.1.1 Hazard labels Service instructions All maintenance work must be carried out in accordance In this manual, hazard notes are labelled with the current service instructions issued by the manu- with the hazard symbol shown alongside. facturer.
Page 10 Chapter 1 Safety regulations Pressure container Screw fittings Hydraulic systems in drinks machines may be under pressure. Many screw fittings can only function reliably when the Undoing such systems can result in severe personal injury or screws are tightened to the specified torques. For this material damage caused by the ejection of materials under reason you should always ensure that you tighten such force, or by flying parts.
Page 11: Electronic Regulations
Chapter 1 Safety regulations Electronic regulations Checking while connected (exceptional situations only!) 1.2.1 General If you do in fact need to check the machine while it is con- DANGER TO LIFE nected to the power supply, it is essential that you observe the When carrying out any work on electrical following rules: appliances, fatal injuries may be caused by...
Page 12: Supply / Disposal
Chapter 1 Safety regulations Supply / Disposal 1.4.2 Using cleaning agents 1.3.1 Drinking water connection In certain quantities, cleaning agents can be hazardous to health. When the machine is cleaned, these cleaning agents It is essential to comply with the installation plans (see “tech- come into contact with many of the drink components (food- nical data”...
Page 13: Regulations For Components
Chapter 1 Safety regulations Regulations for components The unit control system will only function perfectly if the 1.5.1 Rotary-vane type pump PE conductor is correctly connected. Therefore when The rotary-vane type pump contains components that are changing the unit control system please make sure that susceptible to damage from knocks or from pressure, and the PE conductor is perfectly connected to the power which may be damaged if handled incorrectly.
Page 14: Refrigerator
Chapter 1 Safety regulations Refrigerator around the cooler and clean the cooling ribs periodically. The refrigerator cooling system functions Iced up evaporators reduce cooling efficiency and con- only when the appliance is standing up- sume more power. Defrost the appliance once the layer right.
Page 15: General Notes For Service Technicians
Chapter 2 General notes for service technicians General notes for service technicians Equipment 2.1.2 Tools and test equipment There are three important pre-requisites for all service techni- cians in order that they can carry out efficient and cost- The illustration overleaf shows which tools and testing equip- effective maintenance to coffee machines.
Page 16: Hygiene Measures
Chapter 2 General notes for service technicians Series number and production date 2.1.4 Hygiene measures Machines without boosters, with flush valve and their When carrying out maintenance work, hygiene measures must refrigerator with cold water rinse: be observed during every stage of work. This is also a re- Production date up to 1.4.2002 quirement of materials used.
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Page 18: Service Instructions
Chapter 2 General notes for service technicians Service instructions 2.2.1 Service intervals for the Ambiente-2 coffee machine (Index e, 30.06.2003) Servicing must take place after every 45,000 coffee servings, or every 12 months A = Parts relevant to safety (see this section) C = check R = replace No.
Page 19: Instructions On Check Numbers 1-22
Chapter 2 General notes for service technicians Part After 45,000 coffee serv- After xx months or Description of part ings or after 12 months max. counter reading Pump inlet filter 067‘186 36 months Hose connection 067‘766 36 months Outlet house w/o refrigerator 063‘353 36 months Outlet hose with refrigerator...
Page 20 Chapter 2 General notes for service technicians Note 8 Note 10 Check the grinding operation (grain size) and adjust if necessary. If this is not possible, the grinder blades Check the piston motor for clearance on the drive shaft 065’007 must be replaced in pairs. When fitting the and at the connection with the housing.
Page 21 Chapter 2 General notes for service technicians Note 12 Note 15 Check the non-return valve for calcium deposits and Check the motor for proper function and storage. If the against the direction of the arrow for seal. storage is faulty, the motor makes a noise. passing Passing Note 13...
Page 22: Safety Relevant Parts A
Note 20 Conditions for faultless operations Check the height adjustment for correct functioning. Schaerer confirms that the Ambiente 2 coffee machine is suitable for use in catering establishments and that, under the Note 21 conditions set out below, 120 – 180 portions every day, or 45,000 portions every 12 months can be served All parts not listed on the “Ambiente-2 maintenance...
Page 23: Service Instructions - Refrigerator
Chapter 2 General notes for service technicians Service instructions - Refrigerator 2.7.1 Service intervals – Refrigerator / Cappuccinatore appliance (Index e, 30.06.2003) Servicing must take place after every 45,000 – 50,000 cappuccino / milk servings, or every 12 months No. 1-16 = check no. (see Section „Instructions on check numbers 1-16") C = check R = replace Part...
Page 24: Instructions On Check Numbers 1-16
Chapter 2 General notes for service technicians Instructions on check numbers 1-16 Note 6 Note 1 The spring resistance in the water cylinder must be Check the non-return valves for calcium deposits and sufficient to press back the piston after the 3/2 way valve against the direction of the arrow for seal.
Page 25: Conditions For Faultless Operation
Note 13 Conditions for faultless operation Schaerer confirms that the Cappuccino equipment coffee machine is suitable for use in catering establishments and that, under the conditions set out below, 120 milk products...
Page 26: Lack Of Compliance With Maintenance Rules
2.10 Lack of compliance with maintenance the machine casing, depressurising the system etc.) rules Example: Schaerer assumes no liability for personal or property damage or lost revenue to the contractual partner and/or third parties which result from lack of compliance with these maintenance rules.
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Page 28: Carrying Out Maintenance Work
M. Schaerer AG they help to improve the reliability and serviceability of the ma- chines.
Page 29 Chapter 2 General notes for service technicians Systematic machine check The check should be made consistently according to the following list Check Description Statement Measure(s) to take Sight of: service documents and inspection re- Service documents ports Bean container Cup plate and casing on left-hand and right-hand sides Control panel / display Ventilators...
Page 30 Chapter 2 General notes for service technicians ELECTRIC SHOCK The machine casing needs to be removed to carry out the subsequent work. It is possible that you could come into contact with live parts. Such contact could be fatal! Protect yourself from electric shock when carrying out work of this type by disconnecting the appliance from the mains (by removing the fuses, pulling out the mains plug, etc).
Page 31 Chapter 2 General notes for service technicians Regular, preventative maintenance Compliance with safety regulations Inspections to clarify and schedule These introductory notes are extremely important for your maintenance work. understanding and correct application of the dismantling in- Repairs structions that follow: Please read them very carefully because Maintenance tasks are carried out accordingly.
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Page 33: Functional Descriptions
Chapter 3 Functional descriptions Functional descriptions Connections (Supply / Disposal) 3.1.1 General 3.1.3 Drinking water connection The connections to the supply and disposal networks differ, The interface to the drinking water connection to the mains depending on the configuration of the machine and the op- supply is the water connection hose.
Page 34: Waste Water Connection
Chapter 3 Functional descriptions 3.1.6 Waste water connection 3.1.7 Connection to the power system Waste water is disposed of for the coffee machine and the DANGER TO LIFE refrigerator through several hoses: When carrying out any work on electrical Length from the machine housing: approx. 2 m appliances, fatal injuries may be caused by Drip tray outlet: Ø20/12 mm electric shock, if live parts are touched.
Page 35: Calcium (Limescale)
Chapter 3 Functional descriptions 3.1.8 Calcium (limescale) When maintenance work is carried out, components with de- Besides very low quantities of minerals tap water often con- posits of calcium can be treated in two ways: tains a high proportion of bi-carbonate. Depending on the The part is replaced.
Page 36: Components
Chapter 3 Functional descriptions Components 3.2.3 ESD protection (electro static discharge) 3.2.1 General Electrical and electronic components can be damaged by This section contains a description of all the units imple- static discharge. For this reason suitable protection against mented in several of the systems, or which are used in similar electrostatic discharge must be provided for all such compo- form in various systems to prepare products.
Page 37: Grinder
Chapter 3 Functional descriptions 3.2.5 Grinder In the grinder the coffee beans are ground through a three Drawing symbol Illustration level grinding unit to become fresh ground coffee. As the cof- fee beans are crushed, much of the mechanical energy is converted into heat (friction).
Page 38 Chapter 3 Functional descriptions Maintenance Check Most frequent faults (symptoms) Check the meter reading in the “machine info”, then: Empty the bean container and grinder. Worn grinder blade; the grinder blades suffer most wear Check the “grinder empty” message when grinding very fine. If the edges are blunt, the Check the ground coffee for even grinding, grain and resistance to the grinder increases, and the grinder could grinding degree.
Page 39: Brewing Unit
Chapter 3 Functional descriptions 3.2.6 Brewing unit The brewing unit is the core of the coffee machine. The quality Drawing symbol Illustration of the coffee depends very much on the condition of the brew- ing unit, and whether it is functioning perfectly, and whether it is clean.
Page 40 Chapter 3 Functional descriptions Maintenance Service intervals Most frequent faults: After every 45,000 coffee servings or after 12 months of op- Faulty O-rings (too little brewing pressure, leaking water eration check the following: in the machine Outlet piston / lower piston (water inlet) or brewing Cleaning cylinder clogged Function and water-tightness check...
Page 41 Chapter 3 Functional descriptions The three most important piston/cylinder positions are described below Start position / filling The brewing cylinder is located a little way beneath the centre of the full range of the piston. The lower piston is at the lower end of the brewing cylinder.
Page 42 Once wearing or faulty parts have been dismantled, cleaned and repaired, the surfaces marked below (bearing and guiding surfaces) must be lightly (!) greased with the specified grease for use in food applications (take note of the M.Schaerer part nos.!). Please also note which parts should NOT be greased and also the safety instructions and user information for food grease.
Page 43: Rotary-Vane Type Pump
Chapter 3 Functional descriptions 3.2.7 Rotary-vane type pump The pump generates the pressure for all the systems in the Drawing symbol Illustration machine. It increases the pressure of the mains water supply (local mains or fresh water container) to the brewing pressure required for making coffee (7.5 bar).
Page 44 Chapter 3 Functional descriptions Return bypass open: Excess water flows back to the inlet side of the pump MATERIAL DAMAGE Service intervals The rotary-vane type pump contains com- After every 45,000 coffee servings or after 12 months of op- ponents that are susceptible to damage eration check the following: from knocks or from pressure, and which may be damaged if handled incorrectly.
Page 45: Flow Meter
Chapter 3 Functional descriptions 3.2.8 Flow meter The flowmeter measures the water quantity in the serving of Drawing symbol Illustration coffee. A number of the machines’ functions are controlled by this measurement. for example the quantity dosing, or indi- rectly, the heating of the instant heater for coffee. Function The flowmeter is built into the supply pipe to the instant heater for coffee.
Page 46 Chapter 3 Functional descriptions Service intervals After every 45,000 coffee servings or after 12 months of op- eration check the following: Check for calcium deposits, dirt and mechanical damage. Replace O-ring after opening. After 36 months of operation, replace: Complete flowmeter SMSO-2-02.03- 15.07.03...
Page 47: Non-Return Valve
Chapter 3 Functional descriptions 3.2.9 Non-return valve The non-return valve is a stop valve that ensures that water Drawing symbol Illustration flows in one direction only, preventing it from returning in the reverse direction. Non-return valves are installed anywhere where it is necessary to prevent hot water from flowing back into the cold water pipes as a result of the higher pressure.
Page 48: Safety Valve
Chapter 3 Functional descriptions 3.2.10 Safety valve Drawing symbol Illustration The safety valve is a stop valve where on the input side there is pressure and on the output side there is no pressure. Safety valves form part of a multi-level safety concept to protect the instant heater and steam generator from overheating and from bursting under over-pressure.
Page 49: Solenoid Valves Drawing Symbol Illustration
Chapter 3 Functional descriptions 3.2.11 Solenoid valves Drawing symbol illustration Solenoid valves with a pressure connection and one or more Drawing system Illustration working connections are known as directional control valves. They control not only the starting and stopping of the flowing medium, but also the direction it takes between the connec- tions.
Page 50 Chapter 3 Functional descriptions Solenoid valves (3/2 way) When not powered up, connection 1 is connected to connec- tion 3; connection 2 is closed. Housing Valve seat Valve body (core guiding tube) Closing element (plunger) Closing spring Core packing Coil Pressure spring for core packing Valve battery Several individual valves (2/2 or 3/2 way) with a common...
Page 51: Safety Thermostat
Chapter 3 Functional descriptions 3.2.12 Safety thermostat The safety thermostat is one of three safety levels used to Drawing symbol Illustration prevent an instant heater or steam generator from overheat- ing, and thus bursting. If the control system does not switch off the heater in normal circumstances, the safety thermostat will disconnect the current once it reaches a temperature of 155 C.
Page 52: Temperature Sensor
Chapter 3 Functional descriptions 3.2.13 Temperature sensor Drawing symbol Illustration The temperature sensor is an active measurement system to control the temperature of the instant heater and the steam generator. It measures the temperature of these elements almost at its highest point. Function The temperature sensor is based on the principle of a change in resistance of a current-conducting wire when the tempera-...
Page 53: Level Probe
Chapter 3 Functional descriptions 3.2.14 Level probe The level probe controls the water level in the steam genera- Drawing symbol Illustration tor. To ensure that there is always enough steam available, the water level in the steam generator must not be allowed to rise above a certain level.
Page 54 Chapter 3 Functional descriptions MATERIAL DAMAGE Level probes are of differing lengths. A level probe of the incorrect length can cause the steam generator to malfunction. Use only level probes of suitable length for each steam generator. Illustrations showing the dimensions of the different level probes Level probe for SO-2, part no.
Page 55: Screw Connections / Pipes / Hoses
Chapter 3 Functional descriptions 3.2.15 Screw connections / pipes / hoses All water dosing, preparation and control components are Drawing symbol Illustration connected to a wide range of pipes, hoses, and connection materials. At first glance, the range used appears to be rela- tively confusing, but each screw fitting and each pipe has been carefully selected for the purpose for which it is intended.
Page 56: Instant Heater
Chapter 3 Functional descriptions 3.2.16 Instant heater The coffee water is prepared in the instant heater. The ex- Drawing symbol Illustration tremely high heat rating means that heating times are very short. Thus a certain amount of hot water is always available ready to serve a product and it can be topped up very quickly.
Page 57 Chapter 3 Functional descriptions Maintenance Most frequent faults Service intervals After every 45,000 coffee servings or after 12 months of op- Calcium deposits: long heating time eration check the following: brewing temperature too low (white foam) or tea water (All checks must be entered into the inspection report). temperature too low (setting) Water tightness: Traces of calcium at the welded seam or Check...
Page 58 Chapter 3 Functional descriptions Temperature control for brewing system (flushsystem) Temperature reserve to [ºC] heat up the system for the 1. product serving. No product serving Drop of temperature because of product serving (= basic tem- perature) Explanations about the temperature diagram: 1.) The expressions over-temperature “1”...
Page 59 Chapter 3 Functional descriptions Flush system Additional water (bypass) The flush system is used to compensate for the heat loss This system is used to produce a light-coloured coffee as pre- from the coffee. If no coffee is served for 60 seconds, the pared for, among other things, coffee that is to have an injec- water pipe system (pipes and valves) between the hot water tion of a spirit added to it.
Page 60: Booster
Chapter 3 Functional descriptions 3.2.17 Booster The booster is a heat storage device that transfers its heat to Drawing symbol Illustration the brewing water for the first servings of the product before it enters the brewing cylinder. This compensates for the loss in temperature in the brewing water through the brewing valve.
Page 61 Chapter 3 Functional descriptions The temperature curve clearly shows how the booster com- Schematic drawing of the brewing group and temperature pensates for temperature loss of the brewing valve and the diagram brew pipe. Without this "heat push", the brewing and outlet Instant heater temperature would be approx.
Page 62: Steam Generator
Chapter 3 Functional descriptions 3.2.18 Steam generator Drawing symbol Illustration The steam generator produces the steam used to heat and foam milk drinks or for the quick cup warmer – an extra op- tional feature. The comparatively low volumes and the high heating performance guarantee short heating times yet with sufficient steam to be able to prepare a product with steam at any moment.
Page 63: Unit Control System (Ehs)
Chapter 3 Functional descriptions 3.2.19 Unit control system (EHS) The unit control system is the coffee machine’s “brain” and it controls all the machine functions It contains the programs, monitors all the sensors and controls the consumers via the power PCB. The most important elements of the unit control system are the microprocessor, the memory chip that contains the program (Flash ROM) and a special memory chip (EEPROM) for all the system meters.
Page 64 Chapter 3 Functional descriptions Technical data ESD protection (electro static discharge) Supply voltage 36 V DC Battery life: approx. 8 – 10 years Electrical and electronic components can be damaged by Flash memory 4 MBit electrostatic discharge . Such damage only usually appears EEPROM 2 kBit when new components or an entire new PCB are installed.
Page 65: Power Pcb
Chapter 3 Functional descriptions 3.2.20 Power PCB The Power PCB is the power distributor for the machine and thus the interface between the unit control system and the consumers. It contains almost all the elements required to switch the consumers (motors, heaters, valves etc) either direct or via additional power relays.
Page 66 Chapter 3 Functional descriptions Relay plate The heaters are switched via power relays mounted on a separate device plate. These power relays are controlled by the relays on the power PCB. It has an RC-Module at the power relay connectors to act as a protection against interfer- ence.
Page 67 Chapter 3 Functional descriptions Transistors as switching circuit Electronics switching circuits are installed in a wide variety of devices. However, their physical and electronic characteristics differ considerably from the conventional electronics switching circuits with mechanical switching elements. Thus, a little knowl- edge is required in order to carry out an appropriate troubleshooting and fault rectification to electronic switching circuits.
Page 68: Refrigerator (Optional Feature)
Chapter 3 Functional descriptions Refrigerator (optional feature) Drawing symbol Illustration The refrigerator option consists of a small refrigerator in which milk is kept and the dosing and cleaning unit for the serving of milk. The milk can be served as a product on its own (hot milk).
Page 69 Chapter 3 Functional descriptions An illustration of the principle of preparing milk or milk foam. 11 Ventilation valve open The two systems are basically designed in the same way. For 12 Milk pipe refrigerator to foamer head foam preparation there is an additional aeration valve in the 13 Baffle refrigerator-foamer head connecting pipe.
Page 70 Chapter 3 Functional descriptions Rinse systems Make sure that sufficient air can circulate around the cooler and clean the cooling ribs periodically. For hygiene reasons the milk pipes are automatically rinsed Iced up evaporators reduce cooling efficiency and with water a certain time after the last milk serving. This is consume more power.
Page 71: System Documentation
Chapter 3 Functional descriptions System documentation 3.4.1 General The next few pages contain descriptions of all the main sys- tems as process chains. The descriptions provide information as to the question of: “which processes are carried out in an Ambiente-2 when a product button (e.g. ‘white coffee’) is pres- sed”.? The processes are sub-divided into the technical sys- tems.
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Page 73: Brewing System (Coffee)
Chapter 3 Functional descriptions 3.4.2 Brewing system (coffee) ..01.04.2002 ..Serial no. 505123 A large cup of coffee Product serving: Coffee machine in operation, heated, with flush valve, programmed to produce a large cup of coffee. No Requirements: “pre-brewing” and no “chamber opening” during the process. Some processes are shown in simplified form in the following description.
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Page 75 Chapter 3 Functional descriptions Brewing system (coffee), continued ..01.04.2002 ..Serial no. 505123 Process Control system (electronic/electrical) Hydraulic system Mechanical processes step Heating the instant heater The instant heater heating is switched on The water in the instant heater is heated. and off according to the programmed control conditions (transistor switches power relay 11)
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Page 77: Brewing System (Coffee) With Booster
Chapter 3 Functional descriptions 3.4.3 Brewing system (coffee) with booster 02.04.2002 ..Serial no. 505124 ..A cup of espresso coffee Product serving: Coffee machine in operation, heated, programmed to produce an espresso with prebrewing. Requirements: Some processes are shown in simplified form in the following description. See the section entitled Notes “components”...
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Page 79: Hot Water System (Tea)
Chapter 3 Functional descriptions 3.4.4 Hot water system (tea) ..01.04.2002 ..Serial no. 505123 A cup of hot water to make tea Product serving: Machine in operation, heated up, programmed to automatically serve hot water. Requirements: Some processes are shown in simplified form in the following description. See the section entitled Notes “components”...
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Page 81: Hot Water System (Tea) With Booster
Chapter 3 Functional descriptions 3.4.5 Hot water system (tea) with booster 02.04.2002 ..Serial no. 505124 ..A cup of hot water to make tea Product serving: Machine in operation, heated up, programmed to automatically serve hot water. Requirements: Some processes are shown in simplified form in the following description. See the section entitled Notes “components”...
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Page 83: Steam System (Milk Drinks)
Chapter 3 Functional descriptions 3.4.6 Steam system (milk drinks) To heat a cup of milk and then to cause it to foam. Product serving: Machine in operation, heated up, programmed to automatically serve steam. Requirements: Some processes are shown in simplified form in the following description. See the section entitled Notes “components”...
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Page 85: Milk Drinks
Chapter 3 Functional descriptions 3.4.7 Milk drinks A cup of hot milk. Product serving: Machine in operation, heated up, programmed to automatically serve hot milk. Requirements: Refrigerator operational, milk container filled, refrigerator temperature 3 C – 5 C (=optimum temperature) Notes The description below contains only the processes involved in the process of conveying the milk.
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Page 87: Milk / Milk Foam (Cappuccino Or Milk Coffee)
Chapter 3 Functional descriptions 3.4.8 Milk / milk foam (cappuccino or milk coffee) A cup of cappuccino coffee. Product serving: Machine in operation, heated up, programmed to automatically serve cappuccino (milk foam). Requirements: Refrigerator operational, milk container filled, refrigerator temperature 3 C –...
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Page 89: Rinsing The Milk - Milk Foam Pipes (Refrigerator With Cold Water Rinse)
Chapter 3 Functional descriptions 3.4.9 Rinsing the milk – milk foam pipes ..01.04.2002 (refrigerator with cold water rinse) ..Serial no. 505123 Prior events: no milk or milk foam has been served for at least two minutes. During the rinsing process Product serving: product servings are blocked.
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Page 91: Rinsing The Milk - Milk Foam Pipes (Refrigerator With Hot Water Rinse / Hotflush)
Chapter 3 Functional descriptions 3.4.10 Rinsing the milk – milk foam pipes 02.04.2002 ..(refrigerator with hot water rinse / HOTFLUSH) Serial no. 505124 ..Previously: No milk or no milk foam has been dispensed for at least thirty minutes. The product servings Product serving: are blocked to the rinse cycle Machine in operation, heated, programmed to serve milk products.
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Page 93: Fault Diagnosis
Chapter 4 Fault diagnosis Fault diagnosis General notes 4.1.1 How this section is structured 4.1.3 Overview of faults This section is designed and categorised in the form of a ref- At the beginning of every section is a tabular illustration con- erence work.
Page 94: Fault Lists
Chapter 4 Fault diagnosis the functions are monitored. Their function depends on 4.1.4 Fault lists the ability of the program to function reliably. Fault The fault lists are structured as follows: statuses are detected and indicated on the display panel. system / component Specific corrective action can then be taken.
Page 95: Tips For Fault Diagnosis
Chapter 4 Fault diagnosis 4.1.6 Tips for fault diagnosis 4.1.7 Frequent causes of faults Carry out a structured fault diagnosis. This will help you to Some causes of faults can affect almost all parts: locate and repair the fault quickly and clearly. Calcium deposit Obtain an accurate description of the fault from the Loss of water tightness or seal/ leaks...
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Page 97: Fault Lists For Control System / Programming System
Chapter 4 Fault diagnosis Fault lists for control system / programming system 4.2.1 Overview Program flow malfunction/ Display – malfunction messa- programming not possible/ ges (A-Z) card reader Different faults and defects Display malfunction Keyboard / Program malfunction SMSO-2-02.04- 15.07.03...
Page 98 Chapter 4 Fault diagnosis Display – malfunction messages (A-Z) System / component Possible cause Remedy Selection locked Connection to CCI present, accounting The fault is on the accounting system or system not ready. in the CCI. error account system Selection locked The limit switch is not in the correct Check if the door operating pin is position (screw loose)
Page 99 Chapter 4 Fault diagnosis System / component Possible cause Remedy Damage to motor or to gear Electrical test on motor: see “control piston motor timeout system diagram, piston motor” Position switch faulty or is not actu- Functional check on position switch; ated by the brewing unit if necessary set the switch position or replace the position switch...
Page 100 Chapter 4 Fault diagnosis System / component Possible cause Remedy Error in RAM Check all system parameters for System-data Error! unrealistic settings. End program- ming, switch the machine off and then on again. If the error is still pre- sent: Carry out a Config.-Reset, re- program (with Save Data cards).
Page 101 Chapter 4 Fault diagnosis Program flow malfunction System / component Possible cause Remedy Power supply line No mains voltage Check the mains connection (see “con- trol system diagram, mains connection”) Power PCB Voltage supply (fuses F1 or F3 defec- replace (see “Maintenance, Power tive) PCB”) Power PCB defective...
Page 102 Chapter 4 Fault diagnosis Display malfunction (Display is dark, or only a black bar is visible) System / component Possible cause Remedy PE line connection The PE line connection is faulty (inter- Check the PE conductor: make a visual rupted or transition resistance to con- check for corrosion damage at the con- nections too high) tact spade terminals and plugs, use an...
Page 103 Chapter 4 Fault diagnosis Miscellaneous malfunctions (a display message appears for some of these faults) System / component Possible cause Remedy Incorrect programming Correct the programming (see pro- Grounds container Malfunction with “container full” gramming instructions) message Micro switch for grounds container posi- Check the function and setting of the tion is defective / incorrectly adjusted, or position switch (see...
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Page 105 Chapter 4 Fault diagnosis Fault lists – Brewing system SMSO-2-02.04- 15.07.03...
Page 106 Chapter 4 Fault diagnosis Faulty fuses Power PCB / unit control system / Faulty relay or power transistor Power relay Faulty EEPROM Faulty power relay Grinder blade worn Grinder Foreign bodies Faulty motor / gear Faulty motor / gear Piston motor Faulty control system / power PCB O ring defective or worn out Brewing unit...
Page 107 Chapter 4 Fault diagnosis Fault lists – Brewing system (Booster) SMSO-2-02.04- 15.07.03...
Page 108 Chapter 4 Fault diagnosis Faulty fuses Power PCB / unit control system / Faulty relay or power transistor Power relay Faulty EEPROM Faulty power relay Grinder blade worn Grinder Foreign bodies Faulty motor / gear Faulty motor / gear Piston motor Faulty control system / power PCB O ring defective or worn out Brewing unit...
Page 109: Fault Lists - Brewing System
Chapter 4 Fault diagnosis Fault lists – Brewing system 4.3.1 Overview Incorrect grinding quantity Coffee outlet slow Malfunction (grinder(s)) Coffee too cold Incorrect grinding degree Uneven measures in cup Brewing unit malfunction Coffee too hot Heating time too long No foam/ little foam Piston motor malfunction Over-pressure in instant Wet coffee grounds...
Page 110 Chapter 4 Fault diagnosis Coffee running slowly / irregularly System / component Possible cause Remedy Rotary-vane type pump Defective replace Pump pressure setting incorrect adjust to 7.0 – 7.5 bar Flowmeter / non-return valve Nozzle in flowmeter clean / replace flowmeter Baffle behind the non-return valve clean / replace Supply pipe of instant heater...
Page 111 Chapter 4 Fault diagnosis Irregular or uneven measures in cup System / component Possible cause Remedy Programming Incorrect water metering setting Program the water quantity to adapt to the cups; take “lost water” from re- pressing into account, and serve a prod- uct to check (use the same size cup!!) Control system Control system defective (RAM or micro...
Page 112 Chapter 4 Fault diagnosis Coffee too cold/ too hot / Water temperature too low or too high Wide variations can be detected by looking at the white foam = too cold colour of the foam: dark brown foam = too hot System / component Possible cause Remedy...
Page 113 Chapter 4 Fault diagnosis Too little, or no foam System / component Possible cause Remedy Bean container Old coffee (coffee beans or coffee pow- Empty the bean container, connection der) piece and grinder Fill with fresh coffee Grinding degree too coarse (outlet time Adjust grinding degree (see “Mainte- Grinder too short, brewing pressure too low)
Page 114 Chapter 4 Fault diagnosis Wet coffee grounds System / component Possible cause Remedy Grinding degree too coarse (outlet time Adjust grinding degree (see “Mainte- Grinder too short, brewing pressure too low) nance, Setting the Grinding Degree”) Grinding degree too fine (outlet time too Adjust grinding degree (see “Mainte- long, brewing pressure too high) nance, Setting the Grinding Degree”)
Page 115 Chapter 4 Fault diagnosis Grinder malfunction System / component Possible cause Remedy Bean container empty fill up (if it is not empty: check the Mechanical faults “grinder empty” message; see “Func- tional description, grinder”) Coffee congestion (choke-up) in the clean bean container, grease content of coffee use a different type of coffee is too high...
Page 116 Chapter 4 Fault diagnosis Incorrect grinding degree System / component Possible cause Remedy Grinder Grinding degree too fine Adjust grinding degree (see “Mainte- nance, Setting the Grinding Degree”) Grinder blade worn Replace grinder blades (see “Mainte- nance, dismantle/replace grinder blades”) Grinder blade loose, not centred tighten or replace the grinder blades (see “Maintenance, dismantle/replace...
Page 117 Chapter 4 Fault diagnosis Brewing unit malfunction. System / component Possible cause Remedy Grinding degree too fine Adjust grinding degree (see “Mainte- Mechanical faults nance, Setting the Grinding Degree”) Lower piston / outlet piston O-ring defective / worn, or heavily con- clean and/or replace (see “Maintenance, taminated (coffee underneath these O- dismantle lower piston/ replace O-ring”)
Page 118 Chapter 4 Fault diagnosis Piston motor malfunction System / component Possible cause Remedy Piston motor defective replace (see “Maintenance, brewing unit Mechanical faults piston motor”) Piston motor Piston motor fixing loose Install the piston motor correctly (see Maintenance, brewing unit piston motor) “Piston motor timeout”...
Page 119 Chapter 4 Fault diagnosis Flowmeter malfunction (the message on the display for many of these faults is “flowmeter defect”) System / component Possible cause Remedy The supply valve in the water supply Open the supply valve Mechanical faults Supply pipe pipe (customer side) is closed, the pump Check the rotary-vane type pump and is running dry and making a loud noise...
Page 120 Chapter 4 Fault diagnosis SMSO-2-02.04- 15.07.03...
Page 121 Chapter 4 Fault diagnosis Fault lists - hot water system SMSO-2-02.04- 15.07.03...
Page 122 Chapter 4 Fault diagnosis Faulty fuses Power PCB / unit control system / Faulty relay or power transistor Power relay Faulty EEPROM Faulty power relay Valve seat clogged and not water-tight Hot water valve (calcium) Faulty coil Faulty seal on closing element Calcium on heating Instant heater Faulty heater...
Page 123: Fault Lists - Hot Water System
Chapter 4 Fault diagnosis Fault lists - hot water system 4.4.1 Overview Instant heater does not heat The water is cloudy / foam in the water Over-pressure in instant Acid hot water heater No hot water serving Heating time too long SMSO-2-02.04- 15.07.03...
Page 124 Chapter 4 Fault diagnosis Instant heater does not heat up System / component Possible cause Remedy Instant heater Heating defective or heavily calcified replace (see “Maintenance, instant heater tea”) Faulty power PCB, power relay, cabling carry out checks (see control system Electrical faults Power PCB or plug...
Page 125 Chapter 4 Fault diagnosis No hot water serving (For other possible faults, please see “instant heater does not heat up”) System / component Possible cause Remedy Operation hot water served too fast (instant heater no measures to take power sufficient to heat approximately 4 dl of water per minute) Water supply no pressure/too little pressure in pipe...
Page 126 Chapter 4 Fault diagnosis Cloudy water / foam in water System / component Possible cause Remedy Water supply Poor water quality (rust, calcium, other Take samples of the water (examine for contamination) hardness; any other tests necessary) Decalcifying systems Filados: stones not drenched Install the decalcification system as per manufacturer guidelines and put into operation...
Page 127 Chapter 4 Fault diagnosis Fault lists for steam system (without refrigerator) SMSO-2-02.04- 15.07.03...
Page 128 Chapter 4 Fault diagnosis Buttons jam / foreign bodies caught in the panel User panel The keyboard PCB is damp Valve seat clogged and not water-tight (calcium) Steam discharge valve Faulty coil Faulty seal on closing element Calcium on heating Steam generator Faulty heating Temperature sensor defective / calcified...
Page 129: Fault Lists - Steam System
Chapter 4 Fault diagnosis Fault lists – steam system 4.5.1 Overview Steam generator does not heat up Over-pressure in the steam generator No steam emission possible Heating time too long Steam generator over filled SMSO-2-02.04- 15.07.03...
Page 130 Chapter 4 Fault diagnosis Steam generator does not heat up System / component Possible cause Remedy Feed valve defective replace (see spare parts catalogue) Steam generator Heating defective or heavily calcified replace (see “Maintenance, steam generator”) Faulty power PCB, power relay, cabling carry out checks (see control system Electrical faults Power PCB...
Page 131 Chapter 4 Fault diagnosis No steam emission possible (For other possible faults, please see “Steam generator does not heat up”) System / component Possible cause Remedy Water supply (water level not no pressure/too much pressure in pipe Check water connection (supply valve at reached within two minutes) system mains connection on the premises)
Page 132 Chapter 4 Fault diagnosis Steam generator over filled System / component Possible cause Remedy Level probe Level probe faulty, calcified or faulty carry out checks, and if necessary re- cabling place (see “control system diagram, level probe” and “functional descriptions, level probe”) Feed valve clogged or defective, or faulty cabling...
Page 133 Chapter 4 Fault diagnosis Fault lists – Refrigerator (milk / milk foam) SMSO-2-02.04- 15.07.03...
Page 134 Chapter 4 Fault diagnosis Faulty fuses Power PCB / Faulty relay or power transistor Unit control system Faulty EEPROM Faulty starter relay Refrigerator Faulty motor / compressor Faulty temperature sensor Ventilator defective Clogged (coagulated mass of milk) Ventilation valve Faulty lifting magnet Valve seats clogged Valve battery Faulty coils...
Page 135 Chapter 4 Fault diagnosis Fault lists – Refrigerator (milk / milk foam); Hotflush SMSO-2-02.04- 15.07.03...
Page 136 Chapter 4 Fault diagnosis Faulty fuses Power PCB / Faulty relay or power transistor Unit control system Faulty EEPROM Faulty starter relay Refrigerator Faulty motor / compressor Faulty temperature sensor Ventilator defective Clogged (coagulated mass of milk) Ventilation valve faulty lifting magnet Valve seats clogged Hotflush rinse valve Rinse malfunction...
Page 137: Fault Lists - Refrigerator (Milk / Milk Foam)
Chapter 4 Fault diagnosis Fault lists – Refrigerator (milk / milk foam) 4.6.1 Overview Malfunction in refrigerator No product served Refrigerator emitted noise Milk too cold Refrigerator is not cold Bubble formation, or no milk Milk foam too cold enough foam Miscellaneous faults / Milk / milk foam effervesces...
Page 138 Chapter 4 Fault diagnosis No milk/milk foam serving possible (the milk foam contains only large bubbles…) System / component Possible cause Remedy No milk in container fill with milk Refrigerator Milk container The milk is frozen inside the container, Set the control thermostat to the correct the control thermostat is badly adjusted setting (approx.
Page 139 Chapter 4 Fault diagnosis No milk/milk foam serving possible (continued) (the milk foam contains only large bubbles…) The milk foamer head is not enabled; Correct the programming (see pro- Programming the entire milk/milk foam system dis- gramming instructions) abled. Milk / milk foam too cold System / component Possible cause Remedy...
Page 140 Chapter 4 Fault diagnosis Malfunctions in refrigerator System / component Possible cause Remedy External fuses replace Electrical faults Power supply line Fuses F1 of F3 defective replace (see “control system diagram, Power PCB defective Power PCB”) Thermostat setting is incorrect, or the adjust (see “Maintenance, refrigerator”) Refrigerator thermostat is defective...
Page 141 Chapter 4 Fault diagnosis Miscellaneous faults / Refrigerator faults System / component Possible cause Remedy Not water-tight during cleaning Pressure set too high adjust (see “Maintenance, set pump process pressure”) Rotary-vane type pump Solenoid valve for rinsing opera- Baffles at outlet missing, or incorrect replace / install a suitable baffle (see tion size installed...
Page 142 Chapter 4 Fault diagnosis SMSO-2-02.04- 15.07.03...
Page 143: Maintenance
Chapter 5 Dismantling components Maintenance Contents Sub- Component section 5.4.2 Bean container 5.4.3 Cup plate 5.4.8 Brewing unit piston motor 5.4.4 Casings / front covers 5.4.5 Grinder 5.4.7 Brewing unit 5.4.14 Instant heater tea 5.4.12 Instant heater coffee 5.4.18 Dispenser carriage 5.4.11 Flowmeter 5.4.9...
Page 144: Contents (So-2 With Booster)
Chapter 5 Dismantling components Contents (SO-2 with Booster) Sub- Component section 5.4.7 Brewing unit 5.4.6 Booster 5.4.13 Instant heater coffee (Booster) 5.4.15 Instant heater tea (Booster) Distributor cabinet 5.4.10 SMSO-2-02.05- 15.07.03...
Page 145: Preparing For Maintenance Work
Chapter 5 Dismantling components Preparing for maintenance work 5.3.1 Safety Regulations 5.3.3 Notes on the maintenance instructions Dismantling instructions are identified by Safety regulations must be observed in line means of the “dismantle, disassemble” with the work procedure or the maintenance pictogram work concerned.
Page 146: Dismantling / Installing
Chapter 5 Dismantling components Dismantling / installing 5.4.1 Disconnect supply connections The machine check should always be carried out before starting any maintenance work. The machine still needs to be connected to power and water for this check. However as a general rule, the machine should be disconnected from the mains (water and power) for any further work.
Page 147: Bean Container
Chapter 5 Dismantling components 5.4.2 Bean container For safety information see the section entitled “Safety Regulations” Dismantling Place the cups to one side Remove the cup plate frame; if necessary wipe the cup plate dry. Insert the sliding hatch fully into the bean container, check its seating Unscrew the safety screw on the tubulure Pull the bean container out of the tubulure...
Page 148: Cup Plate
Chapter 5 Dismantling components 5.4.3 Cup plate For safety information see the section entitled “Safety Regulations” Dismantling Dismantle the bean container Unscrew the fixing screws for the cup plate and the tubulure. Once the fastening screws on the cup plate have been removed the machine covers are no longer secure, and will tip outwards.
Page 149: Casings / Front Covers
Chapter 5 Dismantling components 5.4.4 Casings / front covers For safety information see the section entitled “Safety Regulations” Dismantle the side / back casing Dismantle the bean container Dismantle the cup plate Remove any screws that you replaced temporarily. You may not need to remove all the casings as this depends on the main- tenance work you have to do.
Page 150 Chapter 5 Dismantling components Refrigerator (optional feature) Disconnect the electrical and hydraulic connections Remove electrical connector devices Loosen connector nuts of the cold and hot water pipes to the refrigerator; disconnect pipes Pull the pipes for milk / milk foam from the hose sleeves on the ventilation valve Electrical check See sections entitled “control system diagram, refrigerator,...
Page 151: Grinder
Chapter 5 Dismantling components 5.4.5 Grinder For safety information see the section entitled “Safety Regulations” Preparations Dismantle the bean container Dismantle the cup plate Dismantle the casings Dismantling the tubulure Remove coffee beans from the tubulure (with a vacuum cleaner) Unscrew the screws from the support Gradually lift the tubulure upwards Remove the covering ring...
Page 152 Chapter 5 Dismantling components Adjusting the grinding degree The grinding degree can be set only when the grinder is operating. The grinding degree is adjusted by turning the worm gear The table below gives the adjustment steps Grinding degree set- Number of clicks of the grinding ting degree disk (take note of the...
Page 153: Booster
Chapter 5 Dismantling components 5.4.6 Booster For safety information see the section entitled “Safety Regulations” Preparations Dismantle the bean container Dismantle the cup plate Move the dispenser carriage fully upwards Dismantling Disconnect the plug-in connection Loosen the union nuts on the brewing pipes. Keep a steady hold on the plastic screw connections on the booster.
Page 154: Brewing Unit
Chapter 5 Dismantling components 5.4.7 Brewing unit For safety information see the section entitled “Safety Regulations” Preparation Dismantle the bean container Dismantle the cup plate Dismantle the casings without the front covers. Swivel the dispenser carriage upwards Loosen the safety lever and swivel it to the side Pull out the elbow union from the outlet connection piece Take the plastic ball out of the elbow union or out of the outlet connection piece, and keep by...
Page 155 Chapter 5 Dismantling components Brewing unit, continued For safety information see the section entitled “Safety Regulations” Remove the brewing unit (with Booster) Loosen brew pipe nuts at the booster below and then hold up Peek threaded joint. Retract the brew unit from the plastic holder Unscrew the screws on the holder (seal!) Take out the brewing unit together with the holder...
Page 156 Chapter 5 Dismantling components Installation Checks: O-ring on outlet connection piece Brewing pipe not kinked or twisted The brewing line is lying on a level parallel to the side wall Carry out assembly in reverse order to the dismantling pro- cedure.
Page 157: Brewing Unit Piston Motor
Chapter 5 Dismantling components 5.4.8 Brewing unit piston motor For safety information see the section entitled “Safety Regulations” Preparation Dismantle the bean container Dismantle the cup plate Dismantle the back casing Dismantling Disconnect the cable from the flat plug connectors on the piston motor Unscrew the two lateral fastening screws on the motor holder...
Page 158 Chapter 5 Dismantling components Installation Carry out assembly in reverse order to the dismantling pro- cedure. When moving the carrier unit into the brewing unit spindle, the spindle grooves must match the carrier unit. The spindle therefore may need to be turned slightly.
Page 159: Rotary-Vane Type Pump
Chapter 5 Dismantling components 5.4.9 Rotary-vane type pump For safety information see the section entitled “Safety Regulations” Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Dismantle the casing Dismantle the front cover Dismantling Loosen the casing on the reinforced hose. Remove the sieve from the elbow screw joint;...
Page 160 Chapter 5 Dismantling components Disconnect the rotary-vane type pump from the motor Completely loosen the connecting clamp; unscrew and remove the screw Uncouple the rotary-vane type pump from the drive motor; Take out the coupling and place on one side. Take note of how the coupling is installed (long side is on the side of the motor) Electrical check...
Page 161: Distributor Cabinet
Chapter 5 Dismantling components 5.4.10 Distributor cabinet ..01.04.2002 ..Serial no. 505123 For safety information see the section entitled “Safety Regulations” Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Casing and right-hand front cover Remove drawer for coffee grounds; Move the dispenser carriage upwards The distributor cabinet is dismantled with all its connection pipes.
Page 162 Chapter 5 Dismantling components Distributor cabinet, continued 02.04.2002 ..Serial no. 505124 ..For safety information see the section entitled “Safety Regulations” Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Casing and right-hand front cover Remove drawer for coffee grounds; Move the dispenser carriage upwards The distributor cabinet is dismantled with all its connection pipes.
Page 163: Flowmeter
Chapter 5 Dismantling components 5.4.11 Flowmeter For safety information see the section entitled “Safety Regulations” Preparation Disconnect supply connections Dismantle the right-hand casing Dismantling Loosen the union nuts on the feed pipe and the screwed nipple on the flowmeter; remove the feed pipe and the non-return valve.
Page 164: Instant Heater Coffee
Chapter 5 Dismantling components 5.4.12 Instant heater coffee ..01.04.2002 ..Serial no. 505123 For safety information see the section entitled “Safety Regulations”" Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Remove right hand casing Dismantling Disconnect the plug-in connection for the temperature sensor Loosen union nut at the beginning of the feed pipe...
Page 165 Chapter 5 Dismantling components Disconnect the plug-in connections at the heating cable on the safety thermostats The connections to the safety thermostats must not be warped (see safety regulations) Disconnect the plug-in connection at the protective conductor connector Dismantle the feed pipe and the temperature sensor Empty the instant heater If it is to be reused, shake out all loose calcium particles or granules.
Page 166: Instant Heater Coffee (Booster)
Chapter 5 Dismantling components 5.4.13 Instant heater coffee (Booster) 02.04.2002 .... Serial no. 505124 ………… For safety information see the section entitled “Safety Regulations”" Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Remove right hand casing Dismantling Disconnect the plug-in connection for the temperature sensor...
Page 167 Chapter 5 Dismantling components Dismantle the feed pipe and the temperature sensor 10. Empty the instant heater If it is to be reused, shake out all loose calcium particles or granules. If necessary rinse out Repair (see 5.5.6) Replace the safety thermostat Electrical check See section entitled “control system diagram”...
Page 168: Instant Heater Tea
Chapter 5 Dismantling components 5.4.14 Instant heater tea ..... 01.04.2002 ..... Serial no. 505123 For safety information see the section entitled “Safety Regulations”" Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Remove right hand casing Dismantling Disconnect the plug-in connection for the temperature sensor Loosen union nut at the beginning of the feed pipe...
Page 169 Chapter 5 Dismantling components Dismantle the feed pipe and the temperature sensor 10. Empty the instant heater If it is to be reused, shake out all loose calcium particles or granules. If necessary rinse out Repair (see 5.5.6) Replace the safety thermostat Electrical check See section entitled “control system diagram”...
Page 170: Instant Heater Tea (Booster)
Chapter 5 Dismantling components 5.4.15 Instant heater tea (Booster) 02.04.2002 ..Serial no. 505124 ..For safety information see the section entitled “Safety Regulations”" Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Remove right hand casing Dismantling Disconnect the plug-in connection for the temperature sensor...
Page 171 Chapter 5 Dismantling components Disconnect the plug-in connections at the heating cable on the safety thermostats The connections to the safety thermostats must not be warped (see safety regulations) Disconnect the plug-in connection at the protective conductor connector Dismantle the feed pipe and the temperature sensor Empty the instant heater If it is to be reused, shake out all loose calcium particles or granules.
Page 172: Steam Generator
Chapter 5 Dismantling components 5.4.16 Steam generator For safety information see the section entitled “Safety Regulations”" Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Dismantle the left-hand casing Dismantling Disconnect the plug-in connection to the level probe Loosen the union nuts at the steam connector T-piece;...
Page 173 Chapter 5 Dismantling components Disconnect the plug-in connection for the temperature sensor Disconnect the plug-in connections at the heating cable on the safety thermostats The connections to the safety thermostats must not be warped (see safety regulations). Disconnect the plug-in connection at the protective conductor connector Dismantle the feed pipe and the temperature sensor 10.
Page 174: Valve Battery
Chapter 5 Dismantling components 5.4.17 Valve battery For safety information see the section entitled “Safety Regulations”" Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Dismantling Loosen the union nuts on the steam outlet pipes and the manometer pipe (optional feature) Label the plug-in connections on the solenoid valves and then pull out the plug...
Page 175: Dispenser Carriage
Chapter 5 Dismantling components 5.4.18 Dispenser carriage For safety information see the section entitled “Safety Regulations”" Preparation Dismantle the bean container Dismantle the cup plate Open the control panel Dismantling Move the dispenser carriage down Remove the outlet baffle and the coffee outlet cup Pull the nipple holder out of the foamer head Pull the foamer head away from the nozzles Move the dispenser carriage up...
Page 176 Chapter 5 Dismantling components 10. Swivel the dispenser carriage with the guide rails up and forwards MATERIAL DAMAGE When you swivel the dispenser carriage, hoses and cables can be squashed or torn out by the housing sections. Swivel the dispenser carriage upwards very carefully, and look out for the hose and cable gui- des.
Page 177: Power Pcb
Chapter 5 Dismantling components 5.4.19 Power PCB For safety information see the section entitled “Safety Regulations, PCBs” Preparation Disconnect supply connections Dismantle the left-hand side casing Disconnect the supply cable (from the toroidal core transformer / voltage stabilising circuit) Pull out the connecting cable to the unit control system from the connector shell on the unit control system Label all the other plug-in connections and disconnect.
Page 178: Unit Control System
Chapter 5 Dismantling components 5.4.20 Unit control system For safety information see the section entitled “Safety Regulations, PCBs” Preparation Disconnect supply connections Dismantle the left-hand side casing Dismantling Pull the connecting cable to the Power PCB out of the plug shell. Label all the other plug-in connections and disconnect.
Page 179: Service
Chapter 5 Dismantling components Service 5.5.1 Replace heating foil For safety information see the section entitled “Safety Regulations, PCBs” Preparation Dismantle the cup plate Maintenance Loosen the cable from the plug; loosen the cable shackle and pull out the cable Carefully loosen the faulty heating foil with a rounded knife tip and pull away Use a cleaning agent (cleaning benzine or acetone) to...
Page 180: Grinder
Chapter 5 Dismantling components 5.5.2 Grinder For safety information see the section entitled “Safety Regulations” Stern tube bearing / worm gear / grinding degree disk Preparation Dismantle the grinder Service Carefully pull the two snap-on strips on the stern tube bearing apart, lifting the stern tube bearing as you do so.
Page 181 Chapter 5 Dismantling components Dismantle / replace the grinder blades Preparation Dismantle the grinder Dismantle the stern tube bearing / worm gear / grinding degree disk Dismantling Rotate the upper grinder section until it comes out Unscrew the grinder blade from the star shaft and from the upper part of the grinder Check the dismantled grinder blade and decide whether you will replace it with a new one or reinstall it (for pic-...
Page 182 Chapter 5 Dismantling components Replace the powder outlet Preparation Dismantle the grinder Service Place a small screwdriver on the underside of the pow- der outlet, and disengage the powder outlet by making a rotating movement. Move it out of the swallow tail guide, and remove Set the new powder outlet into the swallow-tail guide Push downwards and engage Dismantle / replace the grinder motor...
Page 183: Brewing Unit
Chapter 5 Dismantling components 5.5.3 Brewing unit For safety information see the section entitled “Safety Regulations” Disassemble the brewing unit Preparation Dismantle the brewing unit Screw out the screws on the side panel ; lift off the side panel, hold down the spring on the funnel. Pull out the funnel with the two springs and the protec- tion for friction plunger out of the bearings.
Page 184 Chapter 5 Dismantling components Assembly Before starting to reassemble, make sure you are happy that all the components are clean, purified and dry all worn parts have been replaced faulty components have been replaced with new ones all the specified bearing and guiding surfaces have been greased with the correct lubricating grease (see functional descriptions, brewing unit, lubrica- tion chart).
Page 185 Chapter 5 Dismantling components Dismantle the lower piston / replace the O-ring Damaged cylinder walls and pistons no longer function reliably. For this reason when dismantling / assembling this com- ponent, make sure that no scratches are caused. Work very carefully. Preparation Disassemble the brewing unit Service...
Page 186 Chapter 5 Dismantling components Replace the stripper Preparation Disassemble the brewing unit Dismantle the lower piston Service Swivel the stripper downwards Pull the right-hand leg from the neck bearing, guide it downwards slightly, then let go. Pull the left hand leg from the neck bearing Installation Carry out assembly in reverse order to the dismantling pro- cedure.
Page 187: Rotary-Vane Type Pump
Chapter 5 Dismantling components 5.5.4 Rotary-vane type pump For safety information see the section entitled “Safety Regulations” Dismantle / replace the control set Preparation Dismantle the rotary-vane type pump If it is quite clear from the fault diagnosis that only the control set needs to be replaced, then the rotary-vane type pump does not need to be dismantled.
Page 188 Chapter 5 Dismantling components Clean control set Dismantle the control set Clean / decalcify all parts Checks: the valve seats on the inlet and return by-pass, the O-ring, by-pass housing and seal. If any parts are faulty, replace the entire control set. Lightly grease the by-pass ring and piston with grease for food applications (article no.
Page 189 Chapter 5 Dismantling components Replace the capacitor Preparation Dismantle the right-hand casing Capacitors can be tested only on special measurement instruments. Resistance measurements etc. are not meaningful and thus pointless. Service Pull off the protecting cap to the connection Discharge the capacitor: Use a screw driver to make a short-circuit to both plugs Pull the plugs from the capacitor Loosen the capacitor fixture;...
Page 190: Clean Flowmeter / Replace O-Ring
Chapter 5 Dismantling components 5.5.5 Clean flowmeter / replace O-ring For safety information see the section entitled “Safety Regulations” Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Dismantle the right-hand casing and the back casing Dismantle the flowmeter Service Unscrew the screws from the flowmeter cover, and re- move the cover...
Page 191: Replace Safety Thermostat
Chapter 5 Dismantling components 5.5.6 Replace safety thermostat For safety indications see the section entitled “Safety Regulations”, particularly the section on “Safety Thermostat”. Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Remove the casings in accordance with where the instant heater/steam generator is installed.
Page 192: Repair Valve Battery
Chapter 5 Dismantling components 5.5.7 Repair valve battery. For safety information see the section entitled “Safety Regulations” Preparation Disconnect supply connections Dismantle the bean container Dismantle the cup plate Dismantle the valve battery When repairing a valve battery all valves must be renewed (repair kit 063247) Service Loosen the magnet coil and pull the core guide tube...
Page 193: Replace Flash-Rom, Eeprom
Chapter 5 Dismantling components 5.5.8 Replace Flash-ROM, EEPROM For safety information see the section entitled “Safety Regulations, PCB” Preparation Dismantle the unit control system and place on an ESD mat. Exchange the Flash ROM Place the IC insertion tool cleanly on the IC housing, carefully lift out the Flash ROM (EEPROM) and place into its transport packaging.
Page 194: Replace, Install Microswitch
Chapter 5 Dismantling components 5.5.9 Replace, install microswitch For safety information see the section entitled “Safety Regulations” These instructions apply only to the following microswitches: Panel switch Brewing unit start position Milk foamer head position Grounds container Door to refrigerator Adjustment instructions All microswitches are fastened with screws into elongated holes, so that they can be adjusted with optimum effect.
Page 195: Control System Diagram
Chapter 6 Control system diagram Control system diagram Safety regulations DANGER TO LIFE Trouble-shooting electrical circuits When carrying out any work on electrical appliances, fatal injuries may be caused by Almost all of the electrical circuits on an Ambiente-2 with re- electric shock, if live parts are touched.
Page 196: System Test / Initial Test
Chapter 6 Control system diagram if the standby button is actuated. This means that no fur- 6.4.4 Conventions of presentation ther product serving is possible, nor can the instant heater and steam generator heat up. A number of symbols are used in the diagrams, as follows: For reasons of standardisation, the mains voltage is generally stated as 230V AC in the diagram sheets.
Page 199: Trouble-Shooting Electrical Circuits
Chapter 6 Control system diagram Trouble-shooting electrical circuits 6.5.1 Power supply line Operating conditions When the power disconnection unit (switch, plug unit, FI switch) is switched on, the machine is supplied with mains power in accordance with the rating plate. The connection terminals differ, depending on the mains supply. Symptoms The machine is completely, or partially without power.
Page 200 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 201: Power Pcb, Control Voltage
Chapter 6 Control system diagram 6.5.2 Power PCB, control voltage Operating conditions When the mains disconnection unit is switched on and fuse inserts installed, the 36V, 36V S and 5V DC voltages for the control system and consumers are generated via the toroidal core transformer, the power PCB and a section of the unit control system. Symptoms The machine has no or only partial consumer or control voltage (e.g.
Page 202 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 203: Power Pcb, Stabiliser, Control Voltage
Chapter 6 Control system diagram 6.5.3 Power PCB, stabiliser, control voltage Operating conditions When the mains disconnection unit is switched on and fuse inserts installed, the 36V, 36V S and 5V DC voltages for the control system and consumers are generated via the toroidal core transformer, the power PCB and a section of the unit control system. Symptoms The machine has no, or only partial consumer or control voltage (e.g.
Page 204: Cup Plate Heating
Chapter 6 Control system diagram 5V DC 6.5.4 Cup plate heating 36V S L1, N Operating condition The cup plate heating is switched on, as soon as the mains disconnection unit is switched on. Symptoms The cup plate does not get warm, is warm on one side only (note heating time!) Procedure Process Check...
Page 205: Ventilators
Chapter 6 Control system diagram 5V DC 6.5.5 Ventilators ..01.04.2002 36V S L1, N ..Serial no. 505123 Operating condition Both ventilators are operating with correct voltage supply, doors shut and software operating correctly. They are serial con- nected. Symptoms: The ventilators are no longer operating.
Page 206: Ventilators (From Sw Nt2V1.07)
Chapter 6 Control system diagram 5V DC 6.5.6 Ventilators (from SW NT2v1.07) 02.04.2002 ..36V S L1, N Serial no. 505124 ..Operating condition The ventilators have an after-running time of 60 seconds after a product begins to be dispensed. They are switched on in a series.
Page 207: Panel Switch
Chapter 6 Control system diagram 5V DC 6.5.7 Panel switch 36V S L1, N Operating condition When the panel door is shut, there is a signal present at plug X13 1. Symptoms No signal present when the panel door is shut. “Door open” message displays. The 36VS electrical circuit has been interrupted by the main relay.
Page 208: Drawer For Coffee Grounds - Limit Switch
Chapter 6 Control system diagram 6.5.8 Drawer for coffee grounds – 5V DC limit switch 36V S L1, N Operating condition When the grounds container is pushed in, there is a signal present at plug X13 2. Symptoms No signal present when the grounds container is pushed in. „grounds container n. i. place” message displays. The 36VS electri- cal circuit has been interrupted by the main relay.
Page 209: Grinder Motor "Left Hand Side
Chapter 6 Control system diagram 5V DC 6.5.9 Grinder motor “left hand side 36V S L1, N Operating condition When a “coffee” product button is pressed on the button panel, the grinder motor operates (note warming up time!) Symptoms Grinder motor is not functioning. (No fault is displayed on the display). Procedure Process Check...
Page 210: Grinder Motor "Right Hand Side
Chapter 6 Control system diagram 5V DC 6.5.10 Grinder motor 36V S L1, N “right hand side” Operating condition When a “coffee” product button is pressed on the panel keyboard, the grinder motor operates (note warming up time!) Symptoms Grinder motor is not functioning. (No fault is displayed on the display). Procedure Process Check...
Page 211: Piston Motor
Chapter 6 Control system diagram 5V DC 6.5.11 Piston motor 36V S L1, N Operating condition When a “coffee” product button is pressed on the button panel, the piston motor on the brewing unit operates several times briefly during a brewing cycle (note warming up time!) Symptoms Piston motor is not functioning.
Page 212: Limit Switch For Brewing Unit Start Position
Chapter 6 Control system diagram 6.5.12 Limit switch for brewing unit 5V DC start position 36V S L1, N Operating condition When the brewing unit is correctly installed and the brewing cylinder is in the correct position, the switch is actuated and a signal is present at plug X 13 4.
Page 213 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 214 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 215: Instant Heater - "Coffee", 3Kw Heater
Chapter 6 Control system diagram 5V DC 6.5.13 Instant heater – “coffee”, 3kW heater 36V S L1, N Operating condition With correct voltage supply, the water is heated in the “coffee” instant heater (note warm-up time!) Symptoms The water in the “coffee” instant heater does not heat. Procedure Relay 11 is triggered for approximately 4 seconds in the initial test.
Page 216: Temperature Sensor "Coffee
Chapter 6 Control system diagram 5V DC 6.5.14 Temperature sensor “coffee” 36V S L1, N Operating condition When the machine is switched on the temperature sensor measures the temperature in the “coffee” instant heater. Symptoms “Temp. sensor coffee” is displayed. Procedure Service technicians are not able to test the temperature sensor with a sufficient degree of accuracy.
Page 217: Flow Meter
Chapter 6 Control system diagram 5V DC 6.5.15 Flow meter 36V S L1, N Operating condition When making a serving of “coffee” the coffee water flowmeter controls the amount of water measured out. Symptoms “Flowmeter fault” message displays. NOTE: This message displays if there is a fault or defect anywhere in the water system. Therefore, the fault message does not necessarily indicate a defect in the actual flowmeter or its measurement circuit, but merely states that the water flow in the brew- ing system is not functioning or is functioning unevenly.
Page 218: Brewing Valve
Chapter 6 Control system diagram 5V DC 6.5.16 Brewing valve ..01.04.2002 36V S L1, N ..Serial no. 505123 Operating condition The brewing valve is open during the brewing process (closed at zero current) Symptoms The brewing valve is not functioning. Procedure Process Check...
Page 219: Brewing Valve (Booster)
Chapter 6 Control system diagram 5V DC 6.5.17 Brewing valve (Booster) 02.04.2002 ..36V S L1, N Serial no. 505124 ..Operating condition The brewing valve is open during the brewing process (closed at zero current) Symptoms The brewing valve is not functioning. Procedure Process Check...
Page 220: Flush Valve
Chapter 6 Control system diagram 5V DC 6.5.18 Flush valve ..01.04.2002 36V S L1, N ..Serial no. 505123 Operating condition The flush valve is closed after the flush rinse (which lasts approx. 3 seconds) (open at zero current). Symptoms The flush valve is not functioning.
Page 221: Valve For Additional Water (Optional Features)
Chapter 6 Control system diagram 6.5.19 Valve for additional water (op- 5V DC tional features) 36V S L1, N Operating condition When making light-coloured coffee a certain amount of hot water is allowed to pass through the additional water valve (closed at zero current).
Page 222: Booster
Chapter 6 Control system diagram 5V DC 6.5.20 Booster 02.04.2002 ..36V S L1, N Serial no. 505124 ..Operating condition The aluminum body is heated by the heat cartridge with proper power supply. Symptoms The booster is not being heated. Programming The correct pre-heating system must be set.
Page 223 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 224 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 225: Rotary-Vane Type Pump, Motor
Chapter 6 Control system diagram 5V DC 6.5.21 Rotary-vane type pump, motor 36V S L1, N Operating condition When the voltage supply is functioning correctly, the rotary vane type pump operates for a certain period for all product serv- ings. Symptoms The rotary vane type pump motor is not functioning.
Page 226 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 227: Instant Heater - Tea, 3Kw Heater
Chapter 6 Control system diagram 5V DC 6.5.22 Instant heater – tea, 3kW heater 36V S L1, L2, N Operating condition With correct voltage supply, the water is heated in the “tea” instant heater (note warm-up time!) Symptoms The water in the “tea” instant heater is not heated; “Timeout H.tea” message is displayed. Procedure Steps 1-4 Relay 7 and the load relay are triggered for approximately 4 seconds in the initial test.
Page 228: Temperature Sensor - "Tea
Chapter 6 Control system diagram 5V DC 6.5.23 Temperature sensor – “tea” 36V S L1, N Operating condition When the machine is switched on the temperature sensor measures the temperature in the “tea” instant heater. Symptoms “Temp. sensor tea” is displayed. Procedure Service technicians are not able to test the temperature sensor with a sufficient degree of accuracy.
Page 229: Discharge Valve - "Tea
Chapter 6 Control system diagram 5V DC 6.5.24 Discharge valve – “tea” 36V S L1, N Operating condition When hot water is served, the “tea” outlet valve is open (closed at zero current). Symptoms The hot water system outlet valve is not functioning. Procedure Process Check...
Page 230 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 231: Steam Generator Heating, 3Kw
Chapter 6 Control system diagram 5V DC 6.5.25 Steam generator heating, 3kW 36V S L1, L3, N Operating condition With correct voltage supply steam is produced inside the steam generator (note warming up time!) Symptoms The steam generator is not functioning. The “timeout H.steam” message displays. Procedure Steps 1-4 Relay 9 and the load relay are triggered for approximately 4 seconds in the initial test.
Page 232: Temperature Sensor - "Steam
Chapter 6 Control system diagram 5V DC 6.5.26 Temperature sensor - “steam” 36V S L1, N Operating condition When the machine is switched on the temperature sensor measures the temperature of the steam generator. Symptoms “Temp. sensor steam” is displayed. Procedure Service technicians are not able to test the temperature sensor with a sufficient degree of accuracy.
Page 233: Level Probe - "Steam
Chapter 6 Control system diagram 6.5.27 Level probe – “steam” Operating conditions With sufficient water in the steam generator a signal is sent to the unit control system. Symptoms “Level probe steam” message displays. Procedure NOTE: It is not possible to obtain any meaningful measurements on the level probe with a multimeter either in normal operation or in the case of a fault.
Page 234: Feed Valve - "Steam
Chapter 6 Control system diagram 5V DC 6.5.28 Feed valve – “steam” 36V S L1, N Operating condition Once the water in the steam generator does not reach the level probe, the “steam” feed valve opens (closed at zero current). Symptoms The “steam”...
Page 235: Discharge Valve - "Steam
Chapter 6 Control system diagram 5V DC 6.5.29 Discharge valve – “steam” 36V S L1, N Operating condition When steam is served, the “steam ” outlet valve is open (closed at zero current). Symptoms The “steam” outlet valve is not functioning. Procedure Process Check...
Page 236: Discharge Valve - "Steam, Milk
Chapter 6 Control system diagram 5V DC 6.5.30 Discharge valve – “steam, milk” 36V S L1, N Operating condition When milk is served the “steam, milk” outlet valve is open (closed at zero current). Symptoms The “steam, milk ” outlet valve is not functioning. Procedure Process Check...
Page 237: Discharge Valve - "Steam, Milk Foam
Chapter 6 Control system diagram 5V DC 6.5.31 Discharge valve – “steam, milk foam” 36V S L1, N Operating condition When milk foam is served the “steam, milk foam” outlet valve is open (closed at zero current). Symptoms The “steam, milk foam” outlet valve is not functioning. Procedure Process Check...
Page 238: Refrigerator, Cover Switch
Chapter 6 Control system diagram 5V DC 6.5.32 Refrigerator, cover switch 36V S L1, N Operating condition When the milk door is shut, there is a signal present at plug X9 3. Symptoms No signal present when the milk door is shut. “Milk door open” message displays. The 36VS electrical circuit has been inter- rupted by the main relay.
Page 239: Refrigerator, Cooling Unit Motor
Chapter 6 Control system diagram 5V DC 6.5.33 Refrigerator, cooling unit motor 36V S L1, N Operating condition When the refrigerator is switched on (temperature controller open) the cooling unit motor is supplied with mains power. Symptoms The cooling unit motor and ventilator are not functioning. Procedure Process Check...
Page 240: Refrigerator, Foamer Head Limit Switch
Chapter 6 Control system diagram 5V DC 6.5.34 Refrigerator, foamer head limit switch 36V S L1, N Operating condition When the foamer head is installed, there is a signal present at plug X9 1. Symptoms No signal present when the foamer head is installed. No fault message displays in the event of this fault. The 36VS electrical circuit has been interrupted by the main relay.
Page 241 Chapter 6 Control system diagram 5V DC 6.5.35 Refrigerator, solenoid valve for squeeze cylinder ..01.04.2002 36V S L1, N ..Serial no. 505123 Operating condition The pinch valve (open at zero current) closes the suction pipe to the milk container during the rinsing process. Symptoms The pinch valve is not functioning.
Page 242: Refrigerator, Solenoid Valve For Squeeze Cylinder
Chapter 6 Control system diagram 5V DC 6.5.36 Refrigerator, solenoid valve for squeeze cylinder 02.04.2002 ..36V S L1, N (Hotflush) Serial no. 505124 ..Operating condition The pinch valve (open at zero current) closes the suction pipe to the milk container during the rinsing process. Symptoms The pinch valve is not functioning.
Page 243: Refrigerator, Ventilation Valve
Chapter 6 Control system diagram 5V DC 6.5.37 Refrigerator, ventilation valve 36V S L1, N Operating condition The ventilation valve (closed at zero current) opens when the milk serving has ended. Symptoms The ventilation valve is not functioning. Procedure Process Check Possible cause Remedy...
Page 244: Refrigerator, Rinsing Valve - "Milk
Chapter 6 Control system diagram 5V DC 6.5.38 Refrigerator, rinsing valve – “milk” ..01.04.2002 36V S L1, N ..Serial no. 505123 Operating condition The milk rinsing valve is open during the rinsing process (closed at zero current) Symptoms The “milk rinsing valve”...
Page 245: Refrigerator, Rinsing Valve - "Milk Foam
Chapter 6 Control system diagram 5V DC 6.5.39 Refrigerator, rinsing valve – “milk foam” ..01.04.2002 36V S L1, N ..Serial no. 505123 Operating condition The milk foam rinsing valve is open during the rinsing process (closed at zero current) Symptoms The “milk foam rinsing valve”...
Page 246: Refrigerator, Rinsing Valve - "Hotflush
Chapter 6 Control system diagram 5V DC 6.5.40 Refrigerator, rinsing valve – “hotflush” 02.04.2002 ..36V S L1, N Serial no. 505124 ..Operating condition The hotflush rinsing valve is open during the rinsing process (closed at zero current) Symptoms The “hotflush rinsing valve”...
Page 247: Refrigerator, Level Sensor
Chapter 6 Control system diagram 5V DC 6.5.41 Refrigerator, level sensor ..01.04.2002 36V S 15V DC ..Serial no. 505123 Operating condition The level sensor monitors the level of milk in the refrigerator and a “milk empty” message appears if there is not enough milk in the milk container.
Page 248: Refrigerator, Level Sensor (Hotflush)
Chapter 6 Control system diagram 5V DC 6.5.42 Refrigerator, level sensor (Hotflush) 02.04.2002 ..36V S 15V DC Serial no. 505124 ..Operating condition The level sensor monitors the level of milk in the refrigerator and a “milk empty” message appears if there is not enough milk in the milk container.
Page 249: Cup Sensor
Chapter 6 Control system diagram 5V DC 6.5.43 Cup sensor 02.04.2002 ..36V S 15V DC Serial no. 505124 ..Operating condition When serving coffee the electrical circuit is closed if cup is present. Symptoms The cup sensor is not functioning, a cup is positioned in front of the sensor head Procedure NOTE: The LED on the sensor housing is lit up when a cup is positioned in front of the sensor head.
Page 250 Chapter 6 Control system diagram SMSO-2-02.06- 15.07.03...
Page 251: Technical Data
Chapter 7 Technical data Technical data Standard settings (NT2000 software / V1.05-SO-2) Products enabled / enabled / enabled / Ristretto Left 45 % disabled disabled disabled enabled / enabled / enabled / Espresso Left 45 % disabled disabled disabled enabled / enabled / Left enabled /...
Page 252 Chapter 7 Technical data The following installations must be present: 1 Mains disconnection (fully switched off from A Current switch mains with a minimum B Waste water contact break of 3 mm) C Fresh water 6-8°d hardness 2 G ½” connection Internal thread D Buffet installation 3 Non-return valve...
Page 253 Chapter 7 Technical data The following installations must be present: 1 Mains disconnection (fully switched off from A Current switch mains with a minimum B Waste water contact break of 3 mm) C Fresh water 6-8°d hardness 2 G ½” connection Internal thread D Buffet installation 3 Non-return valve...
Page 254 Chapter 7 Technical data The following installations must be present: A Current 1 Mains disconnection (fully switched off from B Waste water switch mains with a minimum C Fresh water 6-8°d hardness contact break of 3 mm) D Buffet installation 2 G ½”...
Page 255 Chapter 7 Technical data The following installations must be present: 1 Mains disconnection (fully switched off from switch mains with a minimum contact break of 3 mm) A Current 1.1 3 pin plug B Waste water 2 G ½” connection Internal thread C Fresh water 6-8°d hardness 3 Non-return valve...
Page 256 Chapter 7 Technical data The following installations must be present: 1 Mains disconnection (fully switched off from switch mains with a minimum contact break of 3 mm) 1.1 3 pin plug 2 G ½” connection Internal thread 3 Non-return valve SVGW tested 4 Filter 5 Pressure reducer...
Page 257 Index Index Cold water rinse 66 Colour code 180 Compaction pressure 35, 39 Accessibility 129 Components 32 Accident Prevention 5 Compressor 21, 64 Accidental contact 179 Condition of the machine 24 Acid resistant 51 Conductance 29 Additional water 55, 71, 73 Conductor designation 180 Air valve 66 Connected load 30...
Page 258 Index ESD protection 12, 32, 60 Initial test 179, 180 Evaporator 10 Injector nozzle 55 Expander 21, 66 Inspection 27 Expiry date 8 Installation direction 9, 46 External voltage 7, 179 Installation work 11 instant heater 18 Instant heater 9, 15, 47, 52, 180 Instruction number 29 Fat content 64 Interface 29, 30, 61...
Page 259 Index Opening pressure 44 RAM 59 Operating error 24, 91 Rating plate 29 Operating personnel 5 Raw milk 8 Operating status 32, 33 RC module 62 Optional features 5 Rectifier 61 Outlet piston 35 Refrigerant 64 Outlet temperature 18, 56, 57 Refrigerator 64 Outlet valve 39 Refrigerator cooling system 10...
Page 260 Index Stripper 35 Unit 32 Supply connection 130 Unit control system 9, 59 Supply network 29 User manual 5 Switch position 46 Switching back on 7, 47, 179 Switching point 32 Valve 9 Switching temperature 47 Valve battery 46 System description 32, 67 Valve seat 44 System test 180 Valve system 66...

Schaerer Ambiente 2 Service Manual

1 Safety Regulations

2 General Notes for Service Technicians

3 Functional Descriptions

4 Fault Diagnosis

5 Maintenance

6 Control System Diagram

7 Technical Data

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