Danfoss VLT AutomationDrive FC 301, Operating Instructions Manual, Page: 47 / 84

When powered with 24 V DC with VLT
®
24 V DC Supply
MCB 107, only the 24 V and 5 V supplies are monitored.
When powered with 3-phase mains voltage, all 3 supplies
are monitored.
Troubleshooting
•
Check for a defective power card.
•
Check for a defective control card.
•
Check for a defective option card.
•
If a 24 V DC supply is used, verify proper supply
power.
WARNING 47, 24 V supply low
The supply on the power card is out of range.
There are 3 supplies generated by the switch mode supply
(SMPS) on the power card:
•
24 V
•
5 V
•
±
18 V
Troubleshooting
•
Check for a defective power card.
WARNING 48, 1.8 V supply low
The 1.8 V DC supply used on the control card is outside of
the allowable limits. The supply is measured on the control
card. Check for a defective control card. If an option card is
present, check for overvoltage.
WARNING 49, Speed limit
When the speed is outside of the specified range in
parameter 4-11 Motor Speed Low Limit [RPM]
and
parameter 4-13 Motor Speed High Limit [RPM]
, the frequency
converter shows a warning. When the speed is below the
specified limit in
parameter 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 in
parameter 4-18 Current Limit .
ALARM 53, AMA motor too big
The motor is too large 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 AMA is manually interrupted.
ALARM 57, AMA internal fault
Try to restart AMA. Repeated restarts can overheat the
motor.
ALARM 58, AMA Internal fault
Contact the Danfoss supplier.
WARNING 59, Current limit
The current is higher than the value in
parameter 4-18 Current Limit . Ensure that motor data in
parameters 1–20 to 1–25 are set correctly. Increase the
current limit if necessary. Ensure that the system can
operate safely at a higher limit.
WARNING 60, External interlock
A digital input signal is indicating a fault condition
externally to the frequency converter. An external interlock
has commanded the frequency converter to trip. Clear the
external fault condition. To resume normal operation, apply
24 V DC to the terminal programmed for external interlock.
Reset the frequency converter.
WARNING/ALARM 61, Feedback error
An error between calculated speed and speed
measurement from feedback device.
Troubleshooting
•
Check the settings for warning/alarm/disabling in
parameter 4-30 Motor Feedback Loss Function .
•
Set the tolerable error in parameter 4-31 Motor
Feedback Speed Error .
•
Set the tolerable feedback loss time in
parameter 4-32 Motor Feedback Loss Timeout .
WARNING 62, Output frequency at maximum limit
The output frequency has reached the value set in
parameter 4-19 Max Output Frequency . Check the
application for possible causes. Possibly increase the
output frequency limit. Be sure that the system can
operate safely at a higher output frequency. The warning
clears when the output drops below the maximum limit.
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.
Troubleshooting
•
Check that the ambient operating temperature is
within the limits.
•
Check for clogged filters.
•
Check the fan operation.
•
Check the control card.
Maintenance, Diagnostics, a... Operating Instructions
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