Miele S 438i - User Manual

TECHNICAL INFORMATION
S 2xx, S 3xx and S 4xx Canister Vacuums
© 2012 Miele USA

Summary

1.0 Construction and Design

1.1 General Information

Guidelines for safe and compliant repair, maintenance, and operation of appliances.

1.2 Cleaning and Care

Procedures for cleaning vacuum cleaners and accessories, emphasizing safe cleaning solutions.

1.1 Type;Construction

1.1.1 S 3 xx Components

Identification and description of the main components of Miele S 3xx canister vacuum cleaners.

1.1.2 S 4 xx Components

Identification and description of the main components of Miele S 4xx canister vacuum cleaners.

1.3 Technical Data

1.3.1 S 247 i - S 256 i Technical Specifications

Detailed technical specifications for Miele S 247i-S 256i vacuum cleaners.

1.3.2 S 269 i - S 282 i Technical Specifications

Detailed technical specifications for Miele S 269i-S 282i vacuum cleaners.

1.3.3 S 3 xx Technical Data

Technical data for Miele S 3xx vacuum cleaners, including suction power and fuse rating.

1.3.4 S 4 xx Technical Data

Technical data for Miele S 4xx vacuum cleaners, including suction power and fuse rating.

1.4 Accessories

1.4.1 Standard Accessories

List of standard accessories supplied with Miele vacuum cleaner models.

1.4.2 Optional Accessories

List of optional accessories available for Miele vacuum cleaner models.

1.4.3 Accessories with New Locking System (S 2 xx Only)

Information on accessories featuring a new locking system for S 2xx models.

1.5 Electrobrush Plug System (S 3 xx and S 4 xx Only)

1.5 Electrobrush Plug System Details

Information on the electrobrush plug system for S 3xx and S 4xx models, including socket and cable.

4.0 Description of Function

4.1 Air Clean Plus Filter System

Explanation of the dustbag and optional filter systems, including Active Air Clean and S-class filters.

4.1.1 Super Air Clean Filter

Details the functionality and filtration efficiency of the Super Air Clean filter.

4.1.2 Active Air Clean Filter

4.1.2 Active Air Clean Filter

Details the Active Air Clean filter's ability to absorb odors using active charcoal.

4.1.3 S-Class Filter

4.1.3 S-Class Filter

Explains the S-class filter's role as a particulate air filter, often required for specific environments.

4.2 Dustbag Change Indicator

4.2.1 S 27 x Dustbag Change Indicator

Testing and operational checks for the dustbag change indicator on S 27x models.

4.2.2 S 3 xx Dustbag Change Indicator

4.2.2 S 3 xx Dustbag Change Indicator

How the dustbag change indicator functions and is affected by usage on S 3xx models.

4.2.3 S 4 xx Dustbag Change Indicator

4.2.3 S 4 xx Dustbag Change Indicator

Explanation of the dustbag change indicator mechanism and its operation on S 4xx models.

4.3 Suction Power

4.3 Suction Power

Analysis of suction power related to negative pressure and air throughput, presented graphically.

4.4 Power Regulation

4.4.1 Manual Power Selection Models

Mechanism of power control in models with manual settings, using phase chopping.

4.4.2 Automatic Models

Operation of automatic models that adjust suction power based on floor conditions.

4.4.3 Booster Setting

4.4.3 Booster Setting

How the booster function temporarily increases motor power for enhanced cleaning.

4.4.4 Phase-Chopping Control Operation

4.4.4 Phase-Chopping Control Operation

Technical explanation of the phase-chopping control method for power regulation.

5.0 Service and Maintenance

General Service Information

Guidelines for qualified personnel performing service and repair work.

5.1 Dustbag Compartment Lid Procedures

Procedures for removing and reinstalling the dustbag compartment lid across different Miele models.

5.2 Accessory Compartment Lid Procedures

Steps for opening, removing, and reassembling the accessory compartment lid.

5.3 Dustbag Holder Procedures

Instructions for removing and installing the dustbag holder for various Miele vacuum models.

5.3.3 S 3 xx Dustbag Holder

Steps for removing and inserting the dustbag holder on S 3xx models.

5.3.4 S 4 xx Dustbag Holder

Steps for removing the dustbag holder screws and the holder on S 4xx models.

5.4 Dust Channel Procedures

Procedures for removing the dust channel assembly from different Miele vacuum models.

5.5 Dustbag Change Indicator Procedures

Instructions for removing the dustbag change indicator from the lid.

5.6 Cap Assembly Procedures

Procedures for removing the cap assembly from the vacuum cleaner base or casing.

5.6.3 S 3 xx Cap Assembly

Procedure for removing the cap assembly from the base on S 3xx models.

5.6.4 S 4 xx Cap Assembly

Procedure for removing the cap assembly from the rear casing on S 4xx models.

5.7 Rear Casing Procedures

Step-by-step guide for removing the rear casing from various Miele vacuum models.

5.7.4 S 4 xx Rear Casing

Procedure for removing the rear casing on S 4xx models.

5.8 Foot Switches Procedures

Instructions for removing foot switches from different Miele vacuum cleaner series.

5.9 Potentiometer;Suction Power Selector Procedures

Procedures for removing and replacing the potentiometer or suction power selector.

5.9.2 S 3 xx Potentiometer;Selector

Notes on replacing the potentiometer assembly and indicator cylinder on S 3xx models.

5.9.3 S 4 xx Potentiometer Procedures

Procedure for removing rotary and slide potentiometers on S 4xx models.

5.9.3 S 4 xx Potentiometer;Selector (cont.)

Instructions for removing the slide potentiometer and foot-operated power selector.

5.10 Electronic (S 4 xx Only)

Steps for removing the electronic control unit from S 4xx Miele vacuum cleaners.

5.11 Fault;Overheat Indicator Lamp

Instructions for removing the fault or overheat indicator lamp from the unit.

5.12 Plug Housing Procedures

Procedures for removing the plug housing from various Miele vacuum cleaner models.

5.13 On;Off Switch Procedures

Instructions for removing the on/off switch from different Miele vacuum cleaner series.

5.14 Flush Socket Outlet Access

Methods for accessing the flush socket outlet on Miele vacuum cleaner bases.

5.15 Sensor Removal (Automatic Models S 280 i - S 282 i)

Procedure for removing the sensor component from automatic Miele vacuum cleaner models.

5.16 Cord Reel Procedures

Instructions for removing and replacing the cord reel assembly on various Miele models.

5.16.3 S 27 x Cord Reel

Procedure for removing the cord reel on S 27x models.

5.16.4 S 3 xx Cord Reel

Procedure for removing the cord reel on S 3xx models, with installation notes.

5.17 Power Cord Replacement

Procedures for removing and replacing the power cord on Miele vacuum cleaners.

5.18 Motor Assembly

Detailed steps for removing and replacing the motor assembly.

5.18.1 S 25 x Motor Assembly

Procedure for removing the motor assembly on S 25x models.

5.18.2 S 27 x Motor Assembly

Procedure for removing the motor assembly on S 27x models.

5.18.3 S 3 xx Motor Assembly

Procedure for removing the motor assembly on S 3xx models, including reinstallation.

5.18.4 S 4 xx Motor Assembly

Procedure for removing the motor assembly on S 4xx models (with holding bracket or central bearing).

5.19 Motor Electronic (Speed Control Board)

Instructions for removing and replacing the motor electronic speed control board.

5.20 Motor Brushes

Procedures for replacing motor brushes, emphasizing simultaneous replacement.

5.21 Electric Brush Socket (S 254 i and S 255 i Only)

Instructions for removing the electric brush socket from specific Miele models.

5.22 Suction Hose with Integrated Wiring (S 2 xx Only)

Description of suction hoses with integrated wiring and their associated sockets.

5.22.3 S 278 i Suction Hose

Details the wired hose with slide potentiometer for S 278i models.

5.23 Turbo Brush (S 2 xx Only)

Instructions for accessing components of the Turbo Brush for S 2xx models.

5.24 Buffer;Bumper Strip (S 3 xx and S 4 xx Only)

Procedures for removing the bumper strip, which also serves as a seal.

5.24.2 S 4 xx Buffer;Bumper Strip

Procedure for removing the bumper strip on S 4xx models.

5.25 Grill for HEPA Filter (S 3 xx Only)

Instructions for removing the grill protecting the HEPA filter on S 3xx models.

6.0 Fault Diagnosis

6.1 Improved Castor (S 2 xx Only)

Information regarding an upgraded castor design for enhanced floor-running performance.

6.2 Dirty Dustbag Compartment (S 27 x and S 28 x Only)

Analysis of issues arising from dirty dustbag compartments and dustbag fitment problems.

6.2.1 Dustbags, Old and New Versions

Explains potential causes related to dustbag fitment and sealing rings.

6.2.2 Modified Dustbag Holder

Verification of a modified dustbag holder designed to prevent dustbag slippage.

6.3 Poor Suction Performance (S 27 x and S 28 x)

Troubleshooting steps for diagnosing and rectifying poor suction performance.

6.5 Poor Blower Performance (S 27 x and S 28 x)

Methods to improve blower performance, potentially by installing a blower plate.

6.6 Dustbag Change Indicator (S 3 xx)

Procedure for adjusting the sensitivity of the dustbag change indicator on S 3xx models.

6.7 Suction Power (S 3 xx)

Troubleshooting guide for low suction power, checking various components for issues.

6.8 Motor Does Not Operate (S 345 i and S 445 i)

Diagnosis and remedy for the motor not operating, often linked to worn motor brushes.

Miele S 438i Specifications

General

Model	S 438i
Category	Vacuum Cleaner
Type	Canister
Dust Bag Capacity	4.5 l
Weight	7.5 kg
Filtration System	Air Clean
Special Features	Automatic cord rewind