When the speed is below the specified limit in
1-86 Trip
Speed Low [RPM]
(except when starting or stopping) the
frequency converter trips.
ALARM 50, AMA calibration failed
Contact the Danfoss supplier or Danfoss Service
Department.
ALARM 51, AMA check U
nom
and I
nom
The settings for motor voltage, motor current, and motor
power are wrong. Check the settings in parameters
1-20
to
1-25
.
ALARM 52, AMA low I
nom
The motor current is too low. Check the settings.
ALARM 53, AMA motor too big
The motor is too big for the AMA to operate.
ALARM 54, AMA motor too small
The motor is too small for the AMA to operate.
ALARM 55, AMA Parameter out of range
The parameter values of the motor are outside of the
acceptable range. AMA does not run.
ALARM 56, AMA interrupted by user
The user has interrupted the AMA.
ALARM 57, AMA internal fault
Try to restart AMA again a number of times, until the AMA
is carried out. Note that repeated runs may heat the motor
to a level where the resistance R
s
and R
r
are increased. In
most cases, however, this is not critical.
ALARM 58, AMA internal fault
Contact Danfoss.
WARNING 59, Current limit
The current is higher than the value in
4-18 Current Limit
.
Troubleshooting
•
Ensure that motor data in parameters
1-20
to
1-25
are set correctly.
•
Possibly increase the current limit. Be sure that
the system can operate safely at a higher limit.
WARNING 60, External interlock
External interlock has been activated. To resume normal
operation, apply 24 V DC to the terminal programmed for
external interlock and reset the frequency converter (via
serial communication, digital I/O, or by pressing [Reset]).
WARNING 61, Tracking error
An error has been detected between the calculated motor
speed and the speed measurement from the feedback
device. The function for Warning/Alarm/ Disable is set in
4-30 Motor Feedback Loss Function
, error setting in
4-31
Motor Feedback Speed Error
, and the allowed error time in
4-32 Motor Feedback Loss Timeout
. During a commissioning
procedure the function may be effective.
WARNING 62, Output frequency at maximum limit
The output frequency is higher than the value set in
4-19 Max Output Frequency
.
ALARM 63, Mechanical brake low
The actual motor current has not exceeded the release
brake current within the start delay time window.
ALARM 64, Voltage Limit
The load and speed combination demands a motor
voltage higher than the actual DC-link voltage.
WARNING/ALARM 65, Control card over temperature
The control card has reached its trip temperature of 75 °C.
WARNING 66, Heat sink temperature low
The frequency converter is too cold to operate. This
warning is based on the temperature sensor in the IGBT
module.
Increase the ambient temperature of the unit. Also, a
trickle amount of current can be supplied to the frequency
converter whenever the motor is stopped by setting
2-00 DC Hold/Preheat Current
at 5% and
1-80 Function at
Stop
Troubleshooting
•
The heat sink temperature measured as 0
°
C
could indicate that the temperature sensor is
defective, causing the fan speed to increase to
the maximum. If the sensor wire between the
IGBT and the gate drive card is disconnected, this
warning would result. Also, check the IGBT
thermal sensor.
ALARM 67, Option module configuration has changed
One or more options have either been added or removed
since the last power-down. Check that the configuration
change is intentional and reset the unit.
ALARM 68, Safe Stop activated
Safe Torque Off has been activated.
Troubleshooting
•
To resume normal operation, apply 24 V DC to
terminal 37, then send a reset signal (via bus,
digital I/O, or by pressing [Reset]).
ALARM 69, Power card temperature
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
•
Check the operation of the door fans.
•
Check that the filters for the door fans are not
blocked.
•
Check that the gland plate is properly installed
on IP21/IP54 (NEMA 1/12) frequency converters.
ALARM 70, Illegal FC configuration
The control card and power card are incompatible.
Troubleshooting
•
Contact the supplier with the type code of the
unit from the nameplate and the part numbers of
the cards to check compatibility.
Warnings and Alarms
Operating Instructions
90
Danfoss A/S © Rev. 05/2014 All rights reserved.
MG16J202
9
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Summary of Contents for VLT FC 103
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