Danfoss VACON 1000 - Page 97

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System default operation: Not detected. System operation is configurable.
Troubleshooting
Check if the ambient temperature is high.
Check if the load of the motor is heavy.
10.3.16 Fault Code 16 - Motor Stall
Cause
The motor frequency/speed is below the set value.
A torque limit condition is present.
Both conditions occur simultaneously and the duration is above the stall time setting.
System default operation: Not detected. System operation is configurable.
Troubleshooting
Check if the motor is overloaded.
Check if there is a mechanical failure.
Check if there are any other problems which make the motor jam.
10.3.17 Fault Code 17 - Motor Reverse
Cause
The motor is rotating in reverse.
System default operation: Not detected. System operation is configurable.
Troubleshooting
Check the motor rotating status.
10.3.18 Fault Code 18 - Motor Overspeed
Cause
The speed of the motor is 120% of the maximum operational speed for longer than 10 s.
System default operation: Coast stop. System operation is configurable.
Troubleshooting
Check the motor status.
Check if the speed encoder is broken.
10.3.19 Fault Code 19 - Motor Underspeed
Cause
The speed of the motor is 6% of the minimum operational speed for longer than 60 s.
System default operation: Not detected. System operation is configurable.
Troubleshooting
Check the motor status.
Check if the speed encoder is broken.
10.3.20 Fault Code 20 - Analog Reference Loss
Cause
The analog input is disconnected.
System default operation: Alarm. System operation is configurable. The system continues to operate and keeps the last reference
speed.
Troubleshooting
Check the analog circuit.
10.3.21 Fault Code 21 - Encoder Abnormal
Cause
The encoder signal is lost or the error between encoder speed and estimated speed is higher than 5%.
AQ363633621020en-000201 / 172F3117 | 97Danfoss A/S © 2021.06
Fault Tracing
VACON® 1000
Operating Guide