6.4 Warning and Alarm Definitions
No. Description Warning Alarm Trip
Lock
Cause of Problem
2 Live zero error X X Signal on terminal 53 or 54 is less than 50% of
value set in 6-10 Terminal 53 Low Voltage,
6-12 Terminal 53 Low Current, 6-20 Terminal 54 Low
Voltage and 6-22 Terminal 54 Low Current.
3 No motor X No motor has been connected to the output of the
frequency converter.
4
Mains phase loss
1)
X X X Missing phase on supply side, or too high voltage
imbalance. Check supply voltage.
7
DC over voltage
1)
X X Intermediate circuit voltage exceeds limit.
8
DC under voltage
1)
X X Intermediate circuit voltage drops below “voltage
warning low” limit.
9 Inverter overloaded X X More than 100% load for too long.
10 Motor ETR over temperature X X Motor is too hot due to more than 100% load for
too long.
11 Motor thermistor over temperature X X Thermistor or thermistor connection is discon-
nected.
12 Torque limit X X Torque exceeds value set in either par. 4-16 or 4-17.
13 Over Current X X X Inverter peak current limit is exceeded.
14 Earth fault X X X Discharge from output phases to ground.
16 Short Circuit X X Short-circuit in motor or on motor terminals.
17 Control word timeout X X No communication to frequency converter.
24 Fan fault X X The fan warning function is an extra protective
function that checks if the fan is running/mounted.
The fan warning can be disabled in 14-53 Fan
Monitor ([0] Disabled).
25 Brake resistor short-circuited X X X Brake resistor is short-circuited, thus brake function
is disconnected.
26 Brake overload X X The power transmitted to the brake resistor over
the last 120 s. exceeds the limit. Possible
corrections: decrease brake energy (lower speed or
longer ramp time).
27 Brake IGBT/Brake chopper short-
circuited
X X X Brake transistor is short-circuited, thus brake
function is disconnected.
28 Brake check X X Brake resistor is not connected/working
30 U phase loss X X Motor phase U is missing. Check the phase.
31 V phase loss X X Motor phase V is missing. Check the phase.
32 W phase loss X X Motor phase W is missing. Check the phase.
36 Mains failure X X This warning/alarm is only active if the supply
voltage to the frequency converter is lost and
14-10 Mains Failure is NOT set to [0] No Function.
38 Internal fault X X Contact local Danfoss supplier.
40 Overload T27 X Check the load connected to terminal 27 or remove
short-circuit connection.
41 Overload T29 x Check the load connected to terminal 29 or remove
short-circuit connection.
46 Gate drive voltage fault X X
47 24 V supply low X X X 24 V DC may be overloaded.
51 AMA check U
nom
and I
nom
X Wrong setting for motor voltage and/or motor
current.
52 AMA low I
nom
X Motor current is too low. Check settings.
53 AMA big motor X The motor is too big for the AMA to operate.
Warnings and Alarms
VLT
®
AutomationDrive FC 360 Quick Guide
32 MG06A102 - VLT
®
is a registered Danfoss trademark
66
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