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
6
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