Danfoss mcd-500 Operating Instruction page 85

MCD 500 Operating Instruction
Display
Parameter out of Range
Phase Sequence
Power Loss
Starter Comms
Thermistor Cct
Time - Overcurrent
Undercurrent
Unsupported Option
Possible cause/Suggested solution
- A parameter value is outside the valid range.
The starter will load the default value for all affected parameters. Press MAIN MENU to go to the first
invalid parameter and adjust the setting.
Related Pars.: None
The phase sequence on the soft starter's input terminals (L1, L2, L3) is not valid.
Check the phase sequence on L1, L2, L3 and ensure the setting in Par. 2-1 is suitable for the installation.
Related Pars.: 2-1
The starter is not receiving mains supply on one 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.
Related Pars.: 15-5
- There is a problem with the connection between the soft starter and the optional communications
module. Remove and reinstall the module. If the problem persists, contact your local distributor.
- There is an internal communications error within the soft starter. Contact your local distributor.
Related Pars.: 16-10
The thermistor input has been enabled and:
- The resistance at the input has fallen below 20 Ω (the cold resistance of most thermistors will be over
this value) or
- A short circuit has occurred. Check and resolve this condition.
Check that a PT100 (RTD) is not connected to 05, 06.
Related Pars.: None.
The MCD 500 is internally bypassed and has drawn high current during running. (The 10A protection curve
trip has been reached or the motor current has risen to 600% of the motor FLC setting.)
Related Pars.: None
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 Pars.: 2-4, 2-5, 16-3
The selected function is not available (e.g. jog is not supported in inside delta configuration).
Related Pars.: None
MG.17.K2.02 - VLT ® is a registered Danfoss trademark
9 Troubleshooting
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