Danfoss VLT MCD 600 Operating Manual page 137

Operating Guide | VLT® Soft Starter MCD 600
12.2.47 Time - Overcurrent
Cause
The soft starter is internally bypassed and has drawn high current during running. (The 10 A protection curve trip has been reached, or
the motor current has risen to 600% of the motor FLC setting.) Related parameters: None.
12.2.48 Undercurrent
Cause
The motor has experienced a sharp drop in current, caused by loss of load. Causes can include broken components (shafts, belts, or
couplings) or a pump running dry.
Troubleshooting
• Check the following parameters:
- Parameter 5-3 Undercurrent.
- Parameter 5-4 Undercurrent Delay.
- Parameter 6-4 Undercurrent.
12.2.49 Underpower
Cause
The motor has experienced a sharp drop in power, caused by loss of load. Causes can include broken components (shafts, belts, or
couplings), or a pump running dry.
Troubleshooting
• Check the following parameters:
- Parameter 5-11 Underpower.
- Parameter 5-12 Underpower delay.
- Parameter 6-8 Underpower.
12.2.50 Undervoltage
Cause
Mains voltage has dropped below the level selected. Causes can include an undersized supply or adding a large load to the system.
12.2.51 Unsupported Option
Cause
The selected function is not available (for example jog is not supported in inside delta configuration). Related parameters: None.
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Troubleshooting
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