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Danfoss 136G9003 VLT HVAC Basic Drive FC 101

136G9003 is a documented HVAC frequency converter used within an industrial automation system.

System function

Rebuilt from individual evidence

Unknown: Evidence and limits

The documented 136G9003 is a Danfoss VLT HVAC Basic Drive FC 101 frequency converter for fan, pump, and compressor control.

The drive varies motor operation for the connected HVAC load; the exact plant controller and parameter set are not documented.

Unknown: Installation-specific compatibility remains undocumented.

Exact reference
136G9003
Category
Drives / VFD
Evidence checked
2026-09-11

System role

This section explains what the product does and where it acts in the surrounding system.

Function
Receives and processes the documented signals or supply for this HVAC frequency converter.
System position
Sits in the HVAC frequency converter path between the documented upstream boundary and the controlled system boundary.
Upstream / inputs
The HVAC system's AC supply, motor, and process demand form the documented upstream and downstream boundaries.
Downstream / outputs
The drive varies motor operation for the connected HVAC load; the exact plant controller and parameter set are not documented.
Limitations
Unknown: the exact installation, controller program, wiring, firmware, and commissioning parameters.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • The documented 136G9003 is a Danfoss VLT HVAC Basic Drive FC 101 frequency converter for fan, pump, and compressor control.

    Confidence: high

  • The drive varies motor operation for the connected HVAC load; the exact plant controller and parameter set are not documented.

    Confidence: medium

Inferences

  • Inferred system position: 136G9003 is installed in the HVAC frequency converter path between its documented upstream signals or supply and the controlled system boundary.

    Confidence: medium

    Rationale: The exact-reference sources identify the product type and a connected system boundary; the placement statement is explicitly marked as an inference.

Unknowns

  • Unknown: the exact installation, controller program, wiring, firmware, and commissioning parameters.

    Confidence: low

    Missing evidence: No exact installation, controller program, wiring, firmware, or commissioning record was captured.

System position diagram

A signal path shows documented upstream signals or supply entering 136G9003, a HVAC frequency converter, which connects to the controlled system boundary.

Reading limit: system position only, not a wiring or safety drawing.

System position inferred from the exact-reference evidence: the HVAC frequency converter sits between the documented upstream and downstream boundaries.

Enlarged system diagram

A signal path shows documented upstream signals or supply entering 136G9003, a HVAC frequency converter, which connects to the controlled system boundary.

System position inferred from the exact-reference evidence: the HVAC frequency converter sits between the documented upstream and downstream boundaries.

View Mermaid source
flowchart LR\n  upstream["Documented upstream signals or supply"] --> unit["136G9003 HVAC frequency converter"]\n  unit --> downstream["Controlled system boundary"]
View diagram labels
Nodes
Documented upstream signals or supply; 136G9003 HVAC frequency converter; Controlled system boundary
Edges
Documented supply or signals; System output path

Next action

The captured evidence supports a concrete HVAC frequency converter role for 136G9003; installation-specific compatibility remains unknown.

Unknown: Installation-specific compatibility and connected equipment must be verified before installation or replacement.

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