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General| Brand | Miele |
|---|---|
| Model | S 421i |
| Category | Vacuum Cleaner |
| Language | English |
Safety, repair, and maintenance procedures for vacuum cleaners.
Details on S 3xx and S 4xx vacuum cleaner construction types.
Detailed technical data for S 2xx, S 3xx, and S 4xx vacuum cleaner models.
Lists standard, optional, and special locking system accessories.
Details on Super Air Clean, Active Air Clean, and S-Class filters.
Explanation of how dustbag change indicators function across models.
How suction power is measured, displayed, and regulated.
Steps for servicing dustbag compartment lids and holders.
Instructions for servicing potentiometers, selectors, and switches.
Procedures for motor assembly, replacement, and brush maintenance.
Diagnosis and remedies for poor suction and blower performance.
Troubleshooting steps for when the motor does not operate.
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