# Csp Gemini Pro Advance Service Training Assessment

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This is the advance quiz for service providers on the CS220/CS200/20 range of Nespresso machines.

• 1.

### What is NESPRESSO's Optimal espresso temperature as it dispenses from the machine?

• A.

155F (+/- 10)

• B.

202F (+/- 5)

• C.

179F (+/- 5)

• D.

187F (+/- 5)

D. 187F (+/- 5)
Explanation
The optimal espresso temperature as it dispenses from the NESPRESSO machine is 187F (+/- 5). This temperature range ensures that the espresso is brewed at the right temperature to extract the flavors and aromas from the coffee beans, resulting in a balanced and flavorful cup of espresso.

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• 2.

### When attempting to dispense coffee or hot water, the pump turns on but there is no water flow. The pump and elbow are known to be good. What is the most likely part causing this issue?

• A.

Flow meter

• B.

Pump thermostat

• C.

Micro switch

• D.

Solenoid valve

A. Flow meter
Explanation
The most likely part causing the issue of no water flow when the pump turns on is the flow meter. The flow meter is responsible for measuring the amount of water flowing through the system. If it is faulty or damaged, it may not be able to detect the water flow and therefore prevent it from dispensing. This would explain why the pump turns on but no water is coming out.

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• 3.

### When a NESPRESSO machine dispenses coffee that is below standard temperature, what is the first and most cost effective action a user can do to correct this problem?

• A.

Replace thermo block

• B.

Descale

• C.

Replace heat sensor

• D.

Add hot water into the water tank.

B. Descale
Explanation
Descaling is the most cost-effective action a user can take to correct the problem of a NESPRESSO machine dispensing coffee below standard temperature. Descaling involves removing mineral deposits that can accumulate over time and affect the machine's performance. By descaling the machine, the user can ensure that it functions properly and that the coffee is dispensed at the correct temperature. This action is more practical and affordable compared to replacing the thermo block or heat sensor, which may require professional assistance or purchasing new parts. Adding hot water to the water tank may temporarily increase the temperature, but it does not address the underlying issue of mineral buildup.

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• 4.

### How frequently must the CS220 milk nozzle be purged with steam to reduce build up of dry milk deposits?

• A.

At every machine reminder to check the thermal milk canister (every hour)

• B.

Each time the disposable straw and nozzle is replaced. (Once a day)

• C.

At every machine reminder to descale.

• D.

Once a week.

A. At every machine reminder to check the thermal milk canister (every hour)
Explanation
The CS220 milk nozzle must be purged with steam at every machine reminder to check the thermal milk canister, which occurs every hour. This is necessary to reduce the build-up of dry milk deposits and ensure the cleanliness and proper functioning of the milk nozzle. By purging the nozzle regularly, any residue or build-up can be effectively removed, preventing blockages and maintaining the quality of the milk being dispensed.

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• 5.

### After inserting a NESPRESSO capsule into the brew chamber, the machine occasionally dispenses hot water into a cup rather than espresso. Why?

• A.

• B.

Brew unit seals are damaged

• C.

Edges of capsule were improperly straightened.

• D.

Magnet was inserted backwards

C. Edges of capsule were improperly straightened.
Explanation
The edges of the capsule being improperly straightened can cause the machine to occasionally dispense hot water instead of espresso. This is because the capsule may not be properly sealed, allowing water to bypass the coffee grounds and flow directly into the cup.

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• 6.

### What are the manufacturer's preset cup volume for the Ristretto, Espresso and Lungo cup size options?

• A.

40ml, 110ml, 140ml

• B.

10ml, 25ml, 80ml

• C.

10ml, 25ml, 110ml

• D.

25ml, 40ml, 110ml

D. 25ml, 40ml, 110ml
Explanation
The manufacturer's preset cup volume for the Ristretto, Espresso, and Lungo cup size options are 25ml, 40ml, and 110ml respectively.

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• 7.

### When the error message "Machine Blocked - Call Service Center" appears instantly after turning on a CS100, CS200 or CS220, which explanation best describes the cause of malfunction?

• A.

Micro switch for capsule containers or safety lid are defective.

• B.

Heat sensor is not relaying thermal temperature.

• C.

Flow meter is not relaying water cycle.

• D.

Drip tray contacts are corroded or wet.

A. Micro switch for capsule containers or safety lid are defective.
Explanation
The correct answer is that the micro switch for capsule containers or safety lid is defective. This means that there is a problem with the switch that detects whether the capsule containers or safety lid are properly in place. This malfunction could be preventing the machine from starting up correctly and causing the error message to appear.

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• 8.

### The GEMINI CS200 and CS220 consists of two (2) program menu accesses... one for the Technician called the After Sales Menu and one for the client called the Power User Menu. What is the difference between the two (2) program menu accesses?

• A.

Only The Power User Menu allows configuration of the direct water connection.

• B.

Only The After Sales Menu allows for starting the descale program.

• C.

Only the Power User Menu allows configuration of the coffee temperature.

• D.

The After Sales Menu allows user to reset the default manufacturer's settings.

C. Only the Power User Menu allows configuration of the coffee temperature.
Explanation
The Power User Menu is the only program menu access that allows the user to configure the coffee temperature. The other program menu access, the After Sales Menu, does not have this capability.

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• 9.

### A NESPRESSO machine is experiencing a reduced extraction flow. The equipment has been descaled and the pump has been replaced, but the extraction flow rate remains low. What part would typically be the cause of this malfunction and can be cleaned and reused?

• A.

Steam outlet nozzle

• B.

Pump fluid connect elbow

• C.

Solenoid valve

• D.

Thermoblock

B. Pump fluid connect elbow
Explanation
The pump fluid connect elbow is the part that would typically be the cause of the reduced extraction flow in a NESPRESSO machine. This part can become clogged or blocked, hindering the flow of water through the machine. Cleaning and reusing the pump fluid connect elbow can often resolve this issue and restore the extraction flow rate to normal.

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• 10.

### On a CS220 GEMINI PRO, the steam function is chosen. Rather than steam exiting the steam outlet the solenoid positioned at the exit point of the thermoblock is clogged resulting in excessive pressure build up causing a steam tube to break. As there is a secondary solenoid built into the steam line for the purpose of releasing any remaining steam pressure into the lower drip tray, why would the machine logic not open the secondary solenoid to prevent excess pressure and damages?

• A.

The thermoblock heat sensor is defective.

• B.

The thermoblock heat sensor did not reach critical levels.

• C.

The equipment's program is incapable of measuring pressure build up to prevent damages.

• D.

The logic board is defective.

C. The equipment's program is incapable of measuring pressure build up to prevent damages.
Explanation
The given answer suggests that the machine's program is not capable of measuring the pressure build-up to prevent damages. This means that even though there is a secondary solenoid built into the steam line for releasing steam pressure, the machine is unable to detect when excessive pressure is building up and therefore does not activate the secondary solenoid. This lack of pressure measurement capability in the equipment's program results in the steam tube breaking due to the excessive pressure build-up.

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• 11.

### On a GEMINI PRO CS model, why would the machine prompt the user on the display to "Push A Button"?

• A.

To test visibility of water tank magnet sensors.

• B.

To test that a button on the keypad functions.

• C.

To test pump reaction.

• D.

To test that the flow meter functions.

D. To test that the flow meter functions.
Explanation
The machine prompts the user to "Push A Button" on the display in order to test that the flow meter functions. This suggests that the flow meter may be a critical component of the machine's operation, and it is important to ensure that it is functioning properly. By prompting the user to push a button, the machine can verify that the flow meter is able to detect and measure the flow of liquid accurately. This test helps to ensure the overall functionality and accuracy of the machine's flow meter.

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• 12.

### On a GEMINI PRO CS model, why would the error message "Machine Blocked - Call Service Center" appear following the message "Push A Button" after attempting to push a button one (1) or more times?

• A.

The power or logic board is defective.

• B.

The flow meter is defective and does not send feedback as water passes through.

• C.

The pump thermostat is overheating and must be allowed to cool down.

• D.

The solenoid is defective and does not allow the electronics to control it during water cycling.

B. The flow meter is defective and does not send feedback as water passes through.
Explanation
The error message "Machine Blocked - Call Service Center" appears after attempting to push a button because the flow meter is defective and does not send feedback as water passes through. This means that the machine is unable to accurately measure the water flow, which can lead to blockages or other issues. Therefore, it is necessary to call the service center to address and fix the problem with the flow meter.

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• 13.

### On a GEMINI PRO CS model, when the error message "Machine Blocked - Call Service Center" appears followed by the message "Heating Up", which of the following explanations is not the cause of this error?

• A.

The safety lid detected a block in the brew unit.

• B.

Thermoblock has malfunctioned.

• C.

Heat sensor has malfunctioned.

• D.

Thermal cut off fuses are burned.

A. The safety lid detected a block in the brew unit.
Explanation
The safety lid detecting a block in the brew unit is not the cause of the error message "Machine Blocked - Call Service Center" followed by "Heating Up". The error message suggests that there is an issue with the heating system of the GEMINI PRO CS model. The malfunctioning of the thermoblock, heat sensor, or thermal cut off fuses could potentially cause this error as they are all components related to the heating system. However, a block in the brew unit would not directly cause this specific error message related to heating.

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• 14.

### On a GEMINI model CS100, CS200 or CS220, what are two possible reasons for an increase of water volume inside the capsule container?

• A.

The steam valve is clogged causing water to exit into the capsule container.

• B.

The large seal found in the shower head assembly of the upper brew chamber is worn or damaged.

• C.

The upper seal found in the shower head assembly of the upper brew chamber is damaged.

• D.

The solenoid(s) responsible for draining the excess fluid line into the drip tray is open.

B. The large seal found in the shower head assembly of the upper brew chamber is worn or damaged.
C. The upper seal found in the shower head assembly of the upper brew chamber is damaged.
Explanation
Possible reasons for an increase in water volume inside the capsule container on a GEMINI model CS100, CS200 or CS220 could be due to the large seal in the shower head assembly of the upper brew chamber being worn or damaged, or the upper seal in the shower head assembly of the upper brew chamber being damaged. These seals play a crucial role in preventing water from escaping the brew chamber, so any damage or wear can result in water leaking into the capsule container.

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• 15.

### On a GEMINI PRO CS model, if the drip tray is inserted properly into the machine, but the operation message "No Drip Tray" appears, which explanation would best describe the cause of malfunction?

• A.

The main electronic board is defective.

• B.

The capsule container is not inserted properly or damaged.

• C.

The metal detection contacts on the drip tray or in the machine are corroded and must either be cleaned or replaced.

• D.

The drip tray is full with water and must be emptied.

C. The metal detection contacts on the drip tray or in the machine are corroded and must either be cleaned or replaced.
Explanation
The most likely cause of the "No Drip Tray" error message appearing, even when the drip tray is inserted properly, is that the metal detection contacts on the drip tray or in the machine are corroded. This corrosion prevents the machine from properly detecting the presence of the drip tray, leading to the error message. Cleaning or replacing the corroded contacts should resolve the issue.

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• 16.

### When performing the pressure test to detect leaks on a GEMINI PRO machine, it is suggested to deactivate the machine once the pressure gauge needle has reached?

• A.

12 (+/- 1.5) bars

• B.

15 (+/- 1.5) bars

• C.

20 (+/- 1.5) bars

• D.

15 PSI

B. 15 (+/- 1.5) bars
• 17.

### On a CS100, CS200 or CS220 a cup button is pressed and water dispenses directly into the drip tray. A "Machine Blocked" error message is not generated. This is the result of a flow meter that contains scale build up which can be cleaned to correct the problem.

• A.

True

• B.

False

A. True
Explanation
The given explanation suggests that on CS100, CS200, or CS220 machines, when the cup button is pressed and water dispenses directly into the drip tray, a "Machine Blocked" error message is not generated. This is because the flow meter in these machines may have scale build-up, which can be cleaned to resolve the issue. Therefore, the statement "True" indicates that the explanation is correct.

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• Current Version
• Mar 21, 2023
Quiz Edited by
ProProfs Editorial Team
• Oct 01, 2014
Quiz Created by
KeithPO