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If a 24 V DC supply is used, verify proper supply power.
Check for a defective heat sink fan.
7.2.44 WARNING 47, 24 V Supply Low
Cause
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.
7.2.45 WARNING 48, 1.8 V Supply Low
Cause
The 1.8 V DC supply used on the control card is outside of the allowed limits. The supply is measured on the control card.
Troubleshooting
Check for a defective control card.
If an option card is present, check for overvoltage.
7.2.46 WARNING 49, Speed Limit
Cause
The warning is shown when the speed is outside of the specified range in
parameter 4-11 Motor Speed Low Limit [RPM]
and
parame-
ter 4-13 Motor Speed High Limit [RPM]
. When the speed is below the specified limit in
parameter 1-86 Trip Speed Low [RPM]
(except
when starting or stopping), the drive trips.
7.2.47 ALARM 50, AMA Calibration Failed
Cause
A calibration error has occurred.
Troubleshooting
Contact the Danfoss supplier or Danfoss service department.
7.2.48 ALARM 51, AMA Check Unom and Inom
Cause
The settings for motor voltage, motor current, and motor power are wrong.
Troubleshooting
Check settings in
parameters 1-20
to
1-25
.
7.2.49 ALARM 52, AMA Low Inom
Cause
The motor current is too low.
Troubleshooting
Check the settings in
parameter 1-24 Motor Current
.
7.2.50 ALARM 53, AMA Motor Too Big
Cause
The motor is too big for the AMA to operate.
Troubleshooting
Check the settings in
parameter group 1-2* Motor Data
.
7.2.51 ALARM 54, AMA Motor Too Small
Cause
The motor is too small for the AMA to operate.
AU275636650261en-000101 / 130R0334 | 709
Danfoss A/S © 2022.12
Troubleshooting
VLT AutomationDrive FC 301/302
Programming Guide
Summary of Contents for VLT AutomationDrive FC 301
Page 2: ......