3-7
VLT is a registered Danfoss trademark
WARNING/ALARM 9
INVERTER TIME
The unit has been operating with the output current having
been in the intermittent range (between 100% and 150%) for
too long. A warning will be displayed when the ETR counter
reaches 98%. When the counter reaches 100%, the drive will
trip. The unit can be programmed to display the ETR counter.
Improperly sized drive and/or motor. Improperly programmed
drive.
Compare the output current (as displayed by the LCP) to the
rated current of the drive and motor.
Ensure that the drive is programmed properly for the application.
See section 4, Drive and Motor Applications for more
information.
Manual reset is only possible after the counter has gone below
90%.
WARNING /ALARM 10
MOTOR TIME
The unit’s ETR function has calculated an over temperature
condition in the motor. This calculation is based on motor
current, speed and the length of time these conditions exist,
based on the settings of parameters 102 through 106. Based
on the selection in parameter 128 the unit will display a warning
or an alarm when the counter reaches 100%.
Overloaded motor (mechanical)
Verify parameters 102 - 106 are set correctly.
Check for mechanical overloading on motor shaft.
Manual reset is possible after the ETR counter has counted to
zero.
WARNING/ALARM 11
MOTOR THERMISTOR
The motor thermistor function has been activated in parameter
128 and a thermistor is connected to either terminal 53 or 54
and programmed as such in parameter 308 or 311. Parameter
128 provides a choice of warning or alarm. Manual reset is
possible.
This warning or trip occurs when the input to terminal 53 or 54
is more than 3K Ohms impedance between that terminal and
terminal 50 or when the voltage to the selected terminal is
less than 8 VDC. This could indicate an overheated motor. It is
also possible that the connection has been broken.
Check for overheated motor (if Thermistor function is being
used). Check for open connection by measuring voltage
between corresponding terminal and terminal 55. A reading of
less than 8 VDC indicates an open connection.
WARNING/ALARM 12
TORQUE LIMIT/CURRENT LIMIT
The torque requirement of the motor is higher than the value
set in parameter 221 for the VLT 5000 or 215 for the VLT
4000/6000/8000 (in motor operation) or parameter 222
(regenerative operation). The warning will be present until the
time programmed in parameter 409 for VLT 5000 or 412 for
the VLT 4000/6000/8000 expires.
Manual reset is possible.
This normally indicates a mechanical overload on the motor,
or incorrect setting of para. 221, 222, (or 215 for the VLT
4000/6000/8000) or incorrectly set ramp up time (para. 207
[206 - VLT 4000/6000/8000).
Check mechanical load on motor.
Ensure that para. 221, 222 [215] are set correctly.
Check ramp up settings.
See Drive and Motor Application in Section 4 for more
information.
WARNING/ALARM 13
OVERCURRENT
The peak output current limit of the unit has exceeded the
limit. After 1.5 seconds the unit will trip. (See ratings tables in
introduction section of this manual.)
This fault may be caused by shock loading or fast accel ramps
with high inertia loads. Incorrect settings of various group 1
parameters may also be the cause.
This fault results in a Trip Locked condition.
See Drive and Motor Application in Section 4 for more
information.
ALARM 14
EARTH FAULT
The unit has sensed output leakage current sufficient enough
to determine that there is a ground fault in the motor or motor
wiring. This fault results in a Trip Locked condition. (See ratings
tables in introduction section of this manual.)
Short circuit to ground in motor or motor wiring, or faulty current
sensor.
Measure resistance to ground of motor leads with
megohmmeter to check for earth faults.
Perform current sensor test (section 5).
See Internal Drive Problems in Section 5.
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