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VACON® 3000
Application Guide
8.2.33.2 Fault Code 49, ID 902 - Pre-charge
Cause
•
Main contactor open timeout.
Troubleshooting
•
Check the main contactor auxiliary contact wires.
8.2.33.3 Fault Code 49, ID 903 - Pre-charge
Cause
•
Pre-charge transformer contactor open timeout.
Troubleshooting
•
Check the pre-charge contactor auxiliary contact wires.
8.2.33.4 Fault Code 49, ID 904 - Pre-charge
Cause
•
DC link discharge timeout.
•
DC link discharge time exceeded the expected discharge time.
Troubleshooting
•
Check the mains contactor state and pre-charge wires.
8.2.33.5 Fault Code 49, ID 905 - Pre-charge
Cause
•
Front-end fault clear timeout.
Troubleshooting
•
If the INU controls the pre-charge, make sure that the AFE does not have a fault. If there is a fault, the pre-charge cannot contin-
ue.
8.2.33.6 Fault Code 49, ID 906 - Pre-charge
Cause
•
DC-link overvoltage. The pre-charge control sensed an overvoltage.
Troubleshooting
•
Check the AFE control signal wires and that the fieldbus connection is active.
8.2.33.7 Fault Code 49, ID 907 - Pre-charge
Cause
•
Front-end PLL phase lock lost. The PLL lost the synchronization during the operation.
Troubleshooting
•
Make sure that there is no input phase or voltage missing during operation.
8.2.33.8 Fault Code 49, ID 908 - Pre-charge
Cause
•
The front end had a fault after it reached the ready state. This fault applies only when the INU controls the pre-charge.
Troubleshooting
•
–
8.2.33.9 Fault Code 49, ID 909 - Pre-charge
Cause
•
The main contactor closes before the pre-charge control command.
Troubleshooting
•
Check the main contactor actuation circuit wires and the feedback wires.
Danfoss A/S © 2021.09
Fault tracing
AB319735759636en-000101 / DPD01822 | 295
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