Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 68

Diagnostics and Troubleshoo...
ALARM 51, AMA check U
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
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 cannot run.
ALARM 56, AMA interrupted by user
The user has interrupted the AMA.
ALARM 57, AMA internal fault
7 7
Try to restart AMA again a number of times, 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
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/ALARM 61, Tracking error
An error between calculated motor speed and speed
measurement from 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.
66
and I
nom nom
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and R are increased. In most cases,
r
Danfoss A/S © Rev. 2014-01-22 All rights reserved.
Operating Instructions
WARNING/ALARM 65, Control card over temperature
The cut-out temperature of the control card is 80 °C.
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. 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. 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
Safe Torque Off has been activated from the VLT
Thermistor Card MCB 112 (motor too warm). Normal
operation can resume when the VLT
MCB 112 applies 24 V DC to T-37 (when the motor
temperature is acceptable ) and when the digital input
Check that the ambient operating temperature is
within limits
Check for clogged filters
Check 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/IP 54 (NEMA 1/12) frequency converters.
®
PTC Thermistor Card
®
PTC
MG21B202