Key facts
- Brand
- Siemens
- Model
- MICROMASTER 420
- Category
- Other device
- Industry
- Industrial
- Documents
- 15
- Languages
- EN · ZH
- Last added
- 2026-09-30
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Siemens MicroMaster 420 Variable Frequency Drive User Manual
This manual covers the MicroMaster 420 variable frequency drive, describing its installation, commissioning, and safe operation. It includes safety warnings, EMC guidance, and optional accessories.
The document is organized into sections on installation, debugging, system parameters, troubleshooting, technical specifications, optional options, EMC compliance, parameter tables, communication interfaces, and advanced operation panels. This manual is written in Chinese.
Siemens MICROMASTER 420 specifications
| Mains operating voltage | 200 V to 240 V ± 10 % |
|---|---|
| Power range | 0.12 kW – 3.0 kW (0.16 hp – 4.0 hp) |
| Inverter efficiency | 96 % to 97 % |
| Output frequency | 0 Hz to 650 Hz |
| Protection level | IP20 |
All Siemens MICROMASTER 420 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
- Siemens MICROMASTER 420 Operating Instructions 104 p
- Siemens MICROMASTER 420 Variable Frequency Drive User Manual 272 p
- Siemens MICROMASTER 420 User Manual 294 p
- Siemens MICROMASTER 420 Inverter Getting Started Guide 16 p
- SIEMENS MICROMASTER 420 general frequency transformer 0.12kW - 11kW Manual 38 p
- Siemens MICROMASTER 420/430/440 Variable Frequency Drive Manual 96 p
- Siemens Micromaster 420/430/440 User Manual 99 p
- Siemens Micromaster 420 Frequency Transformer Manual 294 p
- Siemens MicroMaster 420 Variable Frequency Drive User Manual 296 p
- Siemens Micromaster 420 Frequency Transformer Operating Manual 88 p
- Siemens MICROMASTER 420 Variable Frequency Drive User Manual 294 p
- Siemens MICROMASTER 420 Variable Frequency Drive Operating Manual 88 p
Questions answered in these manuals
What safety warnings are given for the MICROMASTER 420?
The manual warns that the equipment contains dangerous voltages and potentially hazardous rotating parts, that DC link capacitors stay charged for five minutes after power removal, and that only qualified personnel should install, commission, or service the inverter.
What are the recommended fuse ratings for the MICROMASTER 420?
Fuses from the SITOR range should be used; for example, a 3 A NA3803 fuse is recommended for the lower power models.
What safety warnings are included for the MICROMASTER 420?
The manual lists danger, warning, and caution notices that must be observed to prevent death, serious injury, or property damage.
From: Siemens MICROMASTER 420 Variable Frequency Drive User Manual
How are faults diagnosed using the SDP display?
Faults can be identified by interpreting the status information shown on the standard display panel (SDP).
From: Siemens MICROMASTER 420 Variable Frequency Drive User Manual
What is the default ramp‑up and ramp‑down time?
Both the ramp‑up and ramp‑down times are set to 10 seconds by default.
From: Siemens MICROMASTER 420 Inverter Getting Started Guide
How can I start a quick debug of the MICROMASTER 420?
Set parameter P0010 to 1 to enable quick debug, then follow the steps in section 5.1 (e.g., use P0970 to reset).
From: Siemens MICROMASTER 420 Inverter Getting Started Guide