Danfoss VLT Parameter Codes Explained
Search Danfoss VLT HVAC Drive FC 102 parameter, setup, readout, warning and alarm codes such as 1-20, 1-24, 1-29, 3-41, 4-18, 5-10, Alarm 7 and Alarm 13.
⚠️ Practical note: Danfoss VLT drives use grouped parameter numbers like 1-24 Motor Current and alarm numbers like Alarm 7 DC Overvoltage. This page is a technician-friendly lookup based on the VLT HVAC Drive FC 102 Programming Guide. Always verify the exact drive model, software version and safety condition before editing a live drive.
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| Code | Full name | Category | Meaning | Field tip |
|---|
Most useful Danfoss VLT startup parameters
For basic FC 102 commissioning, the quick setup normally starts with the motor nameplate values and ramp settings:
- 1-20 motor power in kW
- 1-22 motor voltage
- 1-23 motor frequency
- 1-24 motor current
- 1-25 motor nominal speed
- 1-29 AMA / automatic motor adaptation
- 3-41 ramp up and 3-42 ramp down time
Danfoss parameters vs alarms
Parameter codes like 1-24 are settings/readouts grouped by function. Alarm numbers like Alarm 7 or Warning 5 are diagnostic messages shown in the alarm log or LCP. For repeated trips, find the root cause before resetting again.
What is a Danfoss VLT parameter code?
A Danfoss VLT parameter code is a grouped number used to identify a drive setting or readout. For example, 1-24 is motor current, while 16-14 is a motor current readout.
Why Danfoss codes look different from Schneider, ABB and Siemens
The function is often similar, but the code format is brand-specific. Schneider Altivar uses short text codes like nCr, ABB uses group numbers like 99.06, Siemens uses p0305, and Danfoss VLT uses codes like 1-24.
❓ Frequently Asked Questions
1-24 is Motor Current. Enter the nominal motor current from the motor nameplate. It is used for torque calculation and motor overload protection.
1-29 is Automatic Motor Adaptation. It lets the drive measure/optimize motor parameters after the correct motor nameplate data is entered.
Alarm 7 is DC Overvoltage. It often appears during fast deceleration, regenerative load, high mains voltage, or braking setup issues.
Alarm 13 means overcurrent. Check motor/cable short circuit, ground fault, acceleration time, motor data, current limit, mechanical jam and load condition before resetting repeatedly.
Check digital input parameters such as 5-10 terminal 18, 5-12 terminal 27, 5-13 terminal 29, plus the wiring examples for start/stop, pulse start/stop and speed up/down.