Danfoss VLT HVAC Drive FC 102

Other manuals for Danfoss VLT HVAC Drive FC 102

Service Guide370 pages

Programming Guide250 pages

Instruction Manual140 pages

Operating Instructions146 pages

Installation Guide36 pages

Installation Instructions10 pages

Design Guide254 pages

Questions and Answers:

A
Amanda MartinezSep 12, 2025
What causes motor overload temperature in Danfoss VLT HVAC Drive FC 102?
- K
  Kristina HoweSep 12, 2025
  To address a motor overload temperature issue in Danfoss DC Drives: * Check for motor overheating. * Check if the motor is mechanically overloaded. * Check that the motor current set in parameter 1-24 Motor Current is correct. * Ensure that the motor data in parameters 1-20 to 1-25 is set correctly. * If an external fan is in use, check that it is selected in parameter 1-91 Motor External Fan. * Running AMA in parameter 1-29 Automatic Motor Adaptation (AMA) tunes the frequency converter to the motor more accurately and reduces thermal loading.
B
Bonnie SmithSep 8, 2025
What to do if brake check failed on Danfoss DC Drives?
- M
  moralesamandaSep 8, 2025
  If the brake check failed on your Danfoss DC Drives, it means the brake resistor is not connected or not working. Check 2-15 Brake Check.
A
amymcfarlandSep 6, 2025
What to do if there is no safety option on Danfoss VLT HVAC Drive FC 102 DC Drives?
- V
  Veronica LewisSep 7, 2025
  If the safety option was removed without applying a general reset on your Danfoss DC Drives, reconnect the safety option.
A
Alan WardAug 28, 2025
How to troubleshoot a motor not reaching maximum speed on Danfoss DC Drives?
- M
  Melissa PaceAug 28, 2025
  If the motor is not reaching its maximum speed using Danfoss DC Drives, program the correct frequency limits. Also, ensure that the reference input signal is scaled correctly by adjusting the settings.
O
osanchezAug 28, 2025
Why is the motor speed unstable in my Danfoss VLT HVAC Drive FC 102?
- B
  Bruce ButlerAug 28, 2025
  If the motor speed is unstable in your Danfoss DC Drives, check the settings in parameter group 1-6* Load Depen. Setting. For closed loop operation, check settings in parameter group 20-0* Feedback.
M
Michelle FuentesAug 28, 2025
What causes a motor to run rough with Danfoss VLT HVAC Drive FC 102?
- H
  hectorthompsonAug 28, 2025
  If the motor runs rough with Danfoss DC Drives, check the motor settings in parameter groups 1-2* Motor Data, 1-3* Adv Motor Data, and 1-5* Load Indep. Setting to avoid over-magnetisation.
J
Joseph WilsonSep 23, 2025
What causes inrush fault in Danfoss VLT HVAC Drive FC 102?
- R
  Randall HernandezSep 23, 2025
  An inrush fault in Danfoss DC Drives is caused by too many power-ups occurring within a short time period. Let the unit cool to operating temperature.
R
Rachel JonesSep 15, 2025
What does it mean if the brake check failed on Danfoss VLT HVAC Drive FC 102?
- J
  John AcostaSep 15, 2025
  If the brake check failed on your Danfoss DC Drives, it means the brake resistor is not connected or not working. Check parameter 2-15 Brake Check.
M
Mary EvansSep 18, 2025
How to fix Heat Sink Temperature Low warning on Danfoss VLT HVAC Drive FC 102?
- E
  Erica ManningSep 18, 2025
  If your Danfoss DC Drives unit shows a Heat Sink Temperature Low warning, it means the drive is too cold to operate, based on the temperature sensor in the IGBT module. To resolve this, increase the ambient temperature of the unit. Alternatively, supply a trickle amount of current to the drive whenever the motor is stopped by setting parameter 2-00 DC Hold/Preheat Current to 5% and parameter 1-80 Function at Stop.
J
John GreeneSep 8, 2025
What does '1.8 V supply low' mean on Danfoss VLT HVAC Drive FC 102?
- P
  Philip BrownSep 8, 2025
  If the 1.8 V DC supply is low on your Danfoss DC Drives, it indicates that the 1.8 V DC supply used on the control card is outside of allowable limits. Check for a defective control card.

Danfoss VLT HVAC Drive FC 102 Specifications

General

Enclosure	IP20, IP21, IP55
Ambient Temperature Range	-10°C to +40°C
Storage Temperature Range	-25°C to +70°C
Relative Humidity	5-95% (non-condensing)
Communication Protocols	Modbus RTU, BACnet, Profibus
Certifications	CE, UL, cUL
Control Principle	PWM
Cooling Method	Forced air cooling
Input Voltage	200-240V, 380-480V, 525-600V
Control Modes	sensorless vector control, closed loop vector control