Tag: danfoss

All the articles with the tag "danfoss".

• Danfoss FC302 Alarm 42 - Causes & Fix

  3 Jun, 2026

  Alarm 42 on Danfoss FC302 VFD means overload on digital output terminal X30/6 or X30/7. Check wiring and load on these terminals.

• Danfoss FC302 VFD Alarm 41 - Causes & Fix

  3 Jun, 2026

  Alarm 41 means overload on digital output terminal 29. Disconnect the load from terminal 29, check for shorts, and verify parameters.

• Danfoss FC302 Alarm 40 - Causes & Fix

  3 Jun, 2026

  Alarm 40 on a Danfoss FC302 is a digital output overload on terminal 27. Check for shorts or excessive load on that terminal.

• Danfoss FC302 VFD ALARM 39 - Causes & Fix

  3 Jun, 2026

  ALARM 39 on Danfoss FC302 means no feedback from heat sink sensor. Check ribbon cable between power card and gate-drive card first.

• Danfoss FC302 VFD Alarm 38 - Causes & Fix

  3 Jun, 2026

  Alarm 38 on a Danfoss FC302 is an internal fault caused by a control-to-power card communication error. Reseat boards first.

• Danfoss FC302 VFD Alarm 37 - Causes & Fix

  3 Jun, 2026

  Alarm 37 on a Danfoss FC302 means phase imbalance. Check and replace blown fuses or fix loose input wiring first.

• Danfoss FC302 Alarm 34 - Causes & Fix

  3 Jun, 2026

  Alarm 34 on a Danfoss FC302 VFD means fieldbus communication fault. Check the option card installation, wiring, and network settings.

• Danfoss FC302 VFD Alarm 33 - Causes & Fix

  3 Jun, 2026

  Alarm 33 means inrush fault from too many power-ups. Let the drive cool, check for rapid power cycling, and reset once.

• Danfoss FC302 Alarm 31 - Causes & Fix

  3 Jun, 2026

  Alarm 31 means motor phase V missing. Most often a loose wire or bad connection on phase V between drive and motor. Check wiring.

• Danfoss FC302 ALARM 30 - Causes & Fix

  3 Jun, 2026

  ALARM 30 on Danfoss FC302 means motor phase U is missing. Most likely fix: check and tighten U-phase motor cable connections.

• Danfoss FC302 Alarm 26 - Causes & Fix

  3 Jun, 2026

  Alarm 26 on Danfoss FC302 VFD means inverter/power stage fault. Most common fix: check motor cable for shorts, then replace IGBT.

• Danfoss FC302 ALARM 25 - Causes & Fix

  3 Jun, 2026

  ALARM 25 on a Danfoss FC302 VFD means brake resistor short circuit. The drive disables braking. Replace the brake resistor first.

• Danfoss FC302 VFD Alarm 16 - Causes & Fix

  3 Jun, 2026

  Alarm 16 on a Danfoss FC302 VFD means a line-to-line short circuit in the motor or motor wiring. Isolate and test cable and windings.

• Danfoss FC302 Alarm 14 - Causes & Fix

  3 Jun, 2026

  Alarm 14 on a Danfoss FC302 VFD means earth fault: current is leaking to ground. Usually a bad motor cable or motor winding insulation.

• Danfoss FC302 VFD Alarm 23 - Causes & Fix

  2 Jun, 2026

  Alarm 23 means the internal cooling fan is not running or has failed. Check the fan, wiring, soft-charge fuses, and control card.

• Danfoss FC302 Alarm 22 - Hoist Brake Fault Fix

  2 Jun, 2026

  Alarm 22 on Danfoss FC302 means hoist mechanical brake did not release or feedback timeout. Check brake operation and timing parameters.

• Danfoss FC302 ALARM 20 - Causes & Fix

  2 Jun, 2026

  ALARM 20 means temperature input error: the sensor is not connected or wired correctly. Check wiring and sensor connection first.

• Danfoss FC302 VFD ALARM 18 - Causes & Fix

  2 Jun, 2026

  ALARM 18 on Danfoss FC302 means motor phase missing. Most common fix: check and tighten all motor output terminals at drive and motor.

• Danfoss FC302 Alarm 17 - Causes & Fix

  2 Jun, 2026

  Alarm 17 on Danfoss FC302 VFD means control word timeout (lost communication from PLC or fieldbus). Check master controller first.

• Danfoss FC302 VFD ALARM 15 - Causes & Fix

  2 Jun, 2026

  ALARM 15 on a Danfoss FC302 means hardware mismatch. Most often a wrong or poorly seated option card. Record parameters 15-40 and 15-41.

• Danfoss FC302 Alarm 39 - Causes & Fix

  30 May, 2026

  Danfoss FC302 Alarm 39 means heatsink sensor fault. Learn the common causes (power card, gate drive, ribbon cable) and repair steps.

• Danfoss FC302 Alarm 38 - Causes & Fix

  30 May, 2026

  Danfoss FC302 Alarm 38 means internal fault, usually a communication error between control and power cards. Reset steps inside.

• Danfoss FC302 ALARM 37 - Causes & Fix

  30 May, 2026

  ALARM 37 on a Danfoss FC302 means phase imbalance between power units. Learn the causes, diagnostic steps, and parts to fix it.

• Danfoss FC302 ALARM 36 - Causes & Fix

  30 May, 2026

  ALARM 36 on the Danfoss FC302 VFD signals mains failure. Learn the common causes (fuses, breakers, supply loss) and repair steps.