Danfoss VLT FC 302 Operating Instructions Manual page 130

Warnings and Alarms
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 cannot run.
ALARM 56, AMA interrupted by user
The user has interrupted AMA.
ALARM 57, AMA internal fault
Continue to restart the AMA, until the AMA is carried out.
NOTICE
Repeated runs may heat the motor to a level where the
resistance R
s
however, this behaviour is not critical.
ALARM 58, AMA Internal fault
Contact the Danfoss supplier.
WARNING 59, Current limit
The current is higher than the value in 4-18 Current Limit.
Ensure that motor data in parameters 1–20 to 1–25 are set
9 9
correctly. Increase the current limit if necessary. Ensure 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/ALARM 61, Tracking error
An error has occurred between the calculated motor speed
and the speed measurement from the feedback device.
The function warning/alarm/disable is set in 4-30 Motor
Feedback Loss Function. Accepted error setting in
4-31 Motor Feedback Speed Error and the allowed time the
error occur setting in 4-32 Motor Feedback Loss Timeout.
During a commissioning procedure, the function could 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 cut-out temperature of the control card is 80 °C.
128
and R are increased. In most cases,
r
Danfoss A/S © Rev. 2014-07-29 All rights reserved.
Operating Instructions
Troubleshooting
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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. This warning results if
the sensor wire between the IGBT and the gate drive card
is disconnected. 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
STO has been activated. 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
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ALARM 70, Illegal FC configuration
The control card and power card are incompatible. To
check compatibility, contact the Danfoss supplier with the
type code of the unit from the nameplate and the part
numbers of the cards.
ALARM 71, PTC 1 Safe Torque Off
STO has been activated from the VLT
Card MCB 112 (motor too warm). Normal operation can
resume when the VLT
applies 24 V DC to terminal 37 (when the motor
temperature is acceptable ) and when the digital input
from the VLT
deactivated. When that happens, a reset signal is be sent
(via Bus, Digital I/O, or by pressing [Reset]).
Check that the ambient operating temperature is
within the limits.
Check for clogged filters.
Check the fan operation.
Check the control card.
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.
®
®
PTC Thermistor Card MCB 112
®
PTC Thermistor Card MCB 112 is
PTC Thermistor
MG37A202