Danfoss VLT FC360 drive fault codes explained. Easy-to-understand guide for diagnosing and fixing common drive faults. Improve equipment uptime.

Below list show Danfoss VLT FC360 drive fault codes:

• Warning /Alarm 2 in danfoss VLT FC360 drive indicates Live zero error. This warning or alarm only appears if programmed in parameter 6-01 Live Zero Timeout Function.
• Warning /Alarm 9 in danfoss VLT FC360 drive indicates Inverter overloaded. The drive has run with more than 100% overload for too long and is about to cut out
• Warning /Alarm 8 in danfoss VLT FC360 drive indicates DC undervoltage. This means the DC-link voltage drops below the undervoltage limit.
• Warning 7 in danfoss VLT FC360 drive indicates DC overvoltage. This means the DC-link voltage exceeds the limit, the drive trips after a certain time.
• Warning 4 in danfoss VLT FC360 drive indicates Mains phase loss. This means a phase is missing on the supply side, or the mains voltage imbalance is too high.
• Warning 3 in danfoss VLT FC360 drive indicates No motor. This means there is no motor is connected to the output of the drive.
• Warning /Alarm 22 in danfoss VLT FC360 drive indicates Hoist Mechanical Brake. This means the torque reference was not reached before timeout.
• Warning /Alarm 20 in danfoss VLT FC360 drive indicates Temp. Input Error. This means the temperature sensor is not connected or faulty temperature sensor.
• Warning /Alarm 18 in danfoss VLT FC360 drive indicates Start Failed. This means the speed cannot exceed the value set in parameter 1-78 Compressor Start Max Speed [Hz] during start within the allowed time.
• Warning /Alarm 17 in danfoss VLT FC360 drive indicates Control word timeout. This means there is no communication to the drive.
• Warning /Alarm 16 in danfoss VLT FC360 drive indicates Short circuit. This means there is short-circuiting in the motor or motor wiring.
• Warning /Alarm 14 in danfoss VLT FC360 drive indicates Earth (Ground) Fault. This means there is current from the output phase to ground, either in the cable between the drive and the motor
• Warning /Alarm 13 in danfoss VLT FC360 drive indicates Over current. This means the inverter peak current limit.
• Warning /Alarm 12 in danfoss VLT FC360 drive: Torque limit. This means the torque has exceeded the value in parameter 4-16 Torque Limit Motor Mode.
• Warning /Alarm 11 in danfoss VLT FC360 drive indicates Motor thermistor overtemperature. This means the motor thermistor indicates that the motor temperature is too high.
• Warning /Alarm 10 in danfoss VLT FC360 drive indicates Motor ETR overtemperature. This means according to the electronic thermal protection (ETR), the motor is too hot.
• Warning /Alarm 25 in danfoss VLT FC360 drive indicates Brake resistor short-circuited. This means the brake resistor is monitored during operation.
• Warning /Alarm 26 in danfoss VLT FC360 drive indicates Brake Resistor Power Limit. This means the power transmitted to the brake resistor is calculated as a mean value over the last 120 s of run time.
• Warning /Alarm 27 in danfoss VLT FC360 drive indicates Brake IGBT/Brake Chopper Short-circuited. This means the brake transistor is monitored during operation, and if a short circuit occurs, the brake function is disabled, and a warning is issued.
• Warning /Alarm 28 in danfoss VLT FC360 drive indicates Brake Check. This means the brake resistor is not connected or not working or faulty brake resistor. 
• Warning /Alarm 30 in danfoss VLT FC360 drive indicates Motor phase U missing. This means the motor phase U between the drive and the motor is missing.
• Warning /Alarm 31 in danfoss VLT FC360 drive indicates Motor phase V missing. This means  the motor phase V between the drive and the motor is missing.
• Warning /Alarm 32 in danfoss VLT FC360 drive indicates Motor phase W missing. This means the motor phase W between the drive and the motor is missing.
• Warning /Alarm 34 in danfoss VLT FC360 drive indicates Fieldbus communication fault. This means the fieldbus on the communication option card is not working or faulty communication card.
• Warning /Alarm 35 in danfoss VLT FC360 drive indicates Option fault. This means an option alarm is received. The alarm is option specific. The most likely cause is a power-up or a communication fault.
• Warning /Alarm 36 in danfoss VLT FC360 drive indicates Mains failure. This warning/alarm is only active if the supply voltage to the drive is lost.
• Warning /Alarm 40 in danfoss VLT FC360 drive indicates Overload T27 - Overload of digital output terminal 27.This means there is an hardware issue in digital output or over load at terminal.
• Warning /Alarm 41 in danfoss VLT FC360 drive indicates Overload T29 - Overload of Digital Output Terminal 29. Check the load connected to terminal 29 or remove the short-circuit connection.
• Warning /Alarm 46 in danfoss VLT FC360 drive indicates Gate drive voltage fault. This means the supply for the gate drive on the power card is out of range.
• Warning /Alarm 47 in danfoss VLT FC360 drive indicates 24 V Supply Low. This means the supply on the power card is out of range.
• Warning /Alarm 49 in danfoss VLT FC360 drive indicates SPEED LIMIT. This means the warning is shown when the speed is outside of the specified range in parameter 4-12 Motor Speed Low Limit [Hz] and parameter 4-14 Motor Speed High Limit [Hz].
• Warning /Alarm 50 in danfoss VLT FC360 drive indicates AMA Calibration Failed. This means a calibration error has occurred due to hardware issue in drive.
• Warning /Alarm 51 in danfoss VLT FC360 drive indicates AMA Check Unom and Inom. This means the settings for motor voltage, motor current, and motor power are wrong. Check settings in parameters 1-20 to 1-25.
• Warning /Alarm 52 in danfoss VLT FC360 drive indicates AMA Low Inom. This means the motor current is too low. Check the settings in parameter 1-24 Motor Current.
• Warning /Alarm 53 in danfoss VLT FC360 drive indicates AMA Motor Too Big. This means the motor is too big for the AMA to operate. Check the settings in parameter group 1-2* Motor Data.
• Warning /Alarm 54 in danfoss VLT FC360 drive indicates AMA Motor Too Small. This means the motor is too small for the AMA to operate. Check the settings in parameter group 1-2* Motor Data.
• Alarm 55 in danfoss VLT FC360 drive indicates AMA Parameter Out of Range. This means the AMA cannot run because the paramenter values of the motor are out of the acceptable range.
• Alarm 56 in danfoss VLT FC360 drive indicates AMA Interrupted by User. This means the AMA is manually interrupted. Re-run the AMA calibration.
• Alarm 57 in danfoss VLT FC360 drive indicates AMA Internal Fault. This means hardware issue in drive power card or control card.
• Alarm 58 in danfoss VLT FC360 drive indicates AMA Internal Fault. This means hardware issue in drive power card or control card. Try to restart the AMA.
• Warning /Alarm 59 in danfoss VLT FC360 drive indicates Current Limit. This means the current is higher than the value in parameter 4-18 Current Limit.
• Alarm 60 in danfoss VLT FC360 drive indicates External Interlock. This means a digital input signal indicates a fault condition external to the drive.
• Warning /Alarm 61 in danfoss VLT FC360 drive indicates Feedback Error. This means an error between calculated speed and speed measurement from feedback device.
• Warning /Alarm 62 in danfoss VLT FC360 drive indicates Output Frequency Limit. This means an the output frequency reaches the value set in parameter 4-19 Max Output Frequency, the drive issues a warning.
• Warning /Alarm 63 in danfoss VLT FC360 drive indicates Mechanical Brake Low. This means the actual motor current has not exceeded the release brake current within the start delay time window.
• Warning /Alarm 64 in danfoss VLT FC360 drive indicates VOLTAGE LIMIT. This means the load and speed combination demands a motor voltage higher than the actual DC-link voltage.
• Warning /Alarm 65 in danfoss VLT FC360 drive indicates Control Card Over Temperature. This means the cutout temperature of the control card has exceeded the upper limit.
• Warning /Alarm 67 in danfoss VLT FC360 drive indicates Option Module Configuration Has Changed.  This means n one or more options have either been added or removed since the last power-down.
• Warning /Alarm 69 in danfoss VLT FC360 drive indicates Power Card Temperature. This means the cutout temperature of the power card has exceeded the upper limit.
• Alarm 70 in danfoss VLT FC360 drive indicates Illegal FC Configuration. This means the control card and power card are incompatible.
• Alarm 80 in danfoss VLT FC360 drive indicates Drive Initialized to Default Value. This means parameter settings are initialized to default settings after a manual reset.
• Warning /Alarm 87 in danfoss VLT FC360 drive indicates Auto DC Brake. This occurs in IT mains when the drive coasts and the DC voltage is higher than 830 V.
• Warning /Alarm 88 in danfoss VLT FC360 drive indicates Option Detection. This means a new option configuration has been detected.
• Warning in danfoss VLT FC360 drive indicates Mechanical brake sliding or HOIST BRAKE SLIDING. This means the motor speed feedback is bigger than 10 RPM during torque building time before the brake is open
• Warning /Alarm 90 in danfoss VLT FC360 drive indicates Feedback Monitor. This means a feedback fault is detected by option B.
• Warning /Alarm 95 in danfoss VLT FC360 drive indicates Broken Belt. This means torque is below the torque level set for no load, indicating a broken belt.
• Warning /Alarm 99 in danfoss VLT FC360 drive indicates Locked Rotor. This means the rotor is blocked. It is only enabled for PM motor control.
• Warning /Alarm 120 in danfoss VLT FC360 drive indicates Position Control Fault. when this alarm occurs, the reason is shown in parameter 37-18 Pos. Ctrl Fault Reason.
• Warning /Alarm 127 in danfoss VLT FC360 drive indicates Back EMF too High. this warning applies to PM motors only.
• Warning /Alarm 157 in danfoss VLT FC360 drive indicates POWER LIMIT MOT. This means the output power exceeds the value defined in parameter 4-82 Power Limit Motor Mode.
• Warning /Alarm 158 in danfoss VLT FC360 drive indicates POWER LIMIT GEN. This means the output power exceeds the value defined in parameter 4-83 Power Limit Generator Mode.
• Alarm 250 in danfoss VLT FC360 drive indicates New Spare Part. This means the power or switch mode supply has been exchanged.
• Warning /Alarm 251 in danfoss VLT FC360 drive indicates New Type Code. This means the drive has a new type code or hardware change in drive.

This is a comprehensive list of Danfoss VLT FC360 drive fault codes. Quickly troubleshoot and resolve common issues.