Danfoss VLT MCD 600 Operating Manual page 125

Operating Guide | VLT® Soft Starter MCD 600
12.2.4 Current Imbalance
Cause
• An imbalance in the incoming mains voltage.
• A problem with the motor windings.
• A light load on the motor.
• A phase loss on mains terminals L1, L2, or L3 during Run mode.
• An SCR that has failed open circuit. A failed SCR can only be diagnosed accurately by replacing the SCR and checking the soft
starter performance.
Troubleshooting
• Check the following parameters:
- Parameter 5-1 Current Imbalance.
- Parameter 5-2 Current Imbalance Delay.
- Parameter 6-3 Current Imbalance.
12.2.5 Current Read Err Lx
Cause
Where X is 1, 2, or 3. Internal fault (PCB fault). The output from the current transformer circuit is not close enough to 0 when the SCRs
are turned off.
Troubleshooting
• Contact the local Danfoss supplier for advice.
• There are no related parameters to this trip message.
12.2.6 Depth Sensor
Cause
The smart card has detected a fault with the depth sensor.
Troubleshooting
• Check the following parameters:
- Parameter 30-12 Depth Sensor Type.
- Parameter 36-3 Depth Sensor.
12.2.7 EEPROM Fail
Cause
An error occurred loading data from the EEPROM to RAM when the LCP powered up.
Troubleshooting
• If the problem persists, contact the local distributor.
• There are no parameters related to this trip message.
Danfoss A/S © 2018.10
Troubleshooting
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