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VLT® HVAC Drive FC 131
Programming Guide
5.5.17 ALARM 38, Internal Fault
Cause
An internal fault occurs.
Troubleshooting
Contact your Danfoss supplier.
5.5.18 ALARM 44, Earth Fault II
Cause
There is a discharge from the output phases to ground, either in the cable between the drive and the motor or in the motor itself.
Troubleshooting
•
Turn off the drive and remove the ground fault.
•
Measure the resistance to ground of the motor cables and the motor with a megohmmeter to check for a ground fault in the
motor.
5.5.19 ALARM 46, Gate Drive Voltage Low
Cause
The supply on the power card is out of range. There are 3 supplies generated by the switch mode power supply (SMPS) on the
power card: 24 V, 5 V, and ±18 V.
Troubleshooting
•
Check the power card.
5.5.20 ALARM 47, 24 V Supply Low
Cause
The 24 V DC is measured on the control card. It occurs when the detected voltage on terminal 12 is lower than 18 V.
Troubleshooting
•
Check the control card and the load connected.
5.5.21 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.
5.5.22 ALARM 52, AMA Low Inom
Cause
The motor current is too low.
Troubleshooting
•
Check the settings in parameter 1-24 Motor Current.
5.5.23 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.
5.5.24 ALARM 54, AMA Motor Too Small
Cause
The motor is too small for the AMA to operate.
Troubleshooting
•
Check the settings in parameter group 1-2* Motor Data.
Danfoss A/S © 2022.05
Troubleshooting
AU370727746889en-000101 / 130R0994 | 185
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