Danfoss vlt soft starter mcd 500 - Page 81

Display Possible cause/Suggested solution
Overpower The motor has experienced a sharp rise in power. Causes can include a momentary overload
condition which has exceeded the adjustable delay time.
Related parameters:
•
2U.
•
2V.
•
16P.
Parameter out of range
•
A parameter value is outside the valid range.
The soft starter loads the default value for all aected parameters. To go to the rst invalid
parameter and adjust the setting, press [Main Menu].
Related parameters: None.
Phase sequence The phase sequence on the soft starter mains terminals (L1, L2, L3) is not valid.
Check the phase sequence on L1, L2, L3, and ensure that the setting in parameter 2-1 Phase
Sequence is suitable for the installation.
Related parameters:
Parameter 2-1 Phase Sequence.
PLC Name selected for a programmable input. Refer to Input A trip.
Power loss The soft starter is not receiving mains supply on 1 or more phases when a start command is
given.
Check that the main contactor closes when a start command is given and remains closed until the
end of a soft stop.
If testing the soft starter with a small motor, it must draw at least 2% of its minimum FLC setting
on each phase.
Related parameters: None.
Pump fault Name selected for a programmable input. Refer to Input A trip.
Starter/communication (between
module and soft starter)
•
There is a problem with the connection between the soft starter and the optional communi-
cations module. Remove and reinstall the module. If the problem persists, contact the local
distributor.
•
There is an internal communication error within the soft starter. Contact the local distributor.
Related parameters:
•
Parameter 16-10 Starter/Comms.
Starter disable Name selected for a programmable input. Refer to Input A trip.
Thermistor cct (thermistor circuit) The thermistor input has been enabled and:
•
The resistance at the input has dropped below 20 Ω (the cold resistance of most thermistors is
above this value) or
•
A short circuit has occurred. Check and resolve this condition.
Check that a PT100 (RTD) is not connected to terminals 05 and 06.
Related parameters: None.
Time - overcurrent 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.
Undercurrent 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.
Related parameters:
•
Parameter 2-4 Undercurrent.
•
Parameter 2-5 Undercurrent Delay.
•
Parameter 16-3 Undercurrent.
Unsupported option (function not
available in inside delta)
The selected function is not available (for example jog is not supported in inside delta congu-
ration).
Related parameters: None.
Vibration Name selected for a programmable input. Refer to Input A trip.
Troubleshooting Operating Guide
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