Danfoss VLT Micro Drive, Quick Manual, Page: 14 / 21

1.6 Troubleshooting
No. Description Warning Alarm Trip
Lock
Error Cause of Problem
2 Live zero error X X Signal on terminal 53 or 60 is less than 50% of value set in par.
6-10, 6-12 and 6-22.
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 disconnected.
12 Torque limit 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 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.
25 Brake resistor short-circuited X X Brake resistor is short-circuited, thus brake function is disconnected.
27 Brake chopper short-circuited X X Brake transistor is short-circuited, thus brake function is discon-
nected.
28 Brake check X Brake resistor is not connected/working
29 Power board over temp X X X Heat-sink cut-out temperature has been reached.
30 Motor phase U missing X X Motor phase U is missing. Check the phase.
31 Motor phase V missing X X Motor phase V is missing. Check the phase.
32 Motor phase W missing X X Motor phase W is missing. Check the phase.
38 Internal fault X X Contact local Danfoss supplier.
44 Earth fault X X Discharge from output phases to ground.
47 Control Voltage Fault X X 24 V DC may be overloaded.
51 AMT check U
nom
and I
nom
X Wrong setting for motor voltage and/or motor current.
52 AMT low I
nom
X Motor current is too low. Check settings.
59 Current limit X VLT overload.
63 Mechanical Brake Low X Actual motor current has not exceeded “release brake” current
within “start delay” time window.
80 Drive Initialised to Default Value X All parameter settings are initialized to default settings.
84 The connection between drive
and LCP is lost
X No communication between LCP and frequency converter
85 Button disabled X See parameter group 0-4* LCP
86 Copy fail X An error occurred while copying from frequency converter to LCP or
vice versa.
87 LCP data invalid X Occurs when copying from LCP if the LCP contains erroneous data -
or if no data was uploaded to the LCP.
88 LCP data not compatible X Occurs when copying from LCP if data are moved between
frequency converters with major differences in software versions.
89 Parameter read only X Occurs when trying to write to a read-only parameter.
90 Parameter database busy X LCP and RS485 connection are trying to update parameters simulta-
neously.
91 Parameter value is not valid in this
mode
X Occurs when trying to write an illegal value to a parameter.
92 Parameter value exceeds the
min/max limits
X Occurs when trying to set a value outside the range.
nw
run
Not While RUNning X Parameter can only be changed when the motor is stopped.
Err. A wrong password was entered X Occurs when using a wrong password for changing a password-
protected parameter.
1)
These faults may be caused by mains distortions. Installing Danfoss Line Filter may rectify this problem.
Table 1.5 Warnings and AlarmsCode list
Quick Guide VLT Micro Drive Quick Guide
MG.02.B6.02 - VLT
®
is a registered Danfoss trademark 13
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