RST FRC-F Series, Manual

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130
15 Errors and Warnings
Note : The following compilation covers the most common errors and warnings.
15.1 Error messages at the converter
15.1.1 Encoder polarity
Triggered:
Signs of set and actual value do not correspond.
Causes and remedy:
Assignment of motor sense of rotation and incremental encoder tracks is not correct. During up-
movement of the
cabin, a positive speed must be displayed.
Exchange pulse encoder track A and B or -A and -B or 2 motor phases.
15.1.2 No start-up
Triggered:
Despite set value and 100 % torque, not actual movement recognized.
Causes and remedy:
The incremental encoder is not connected properly or is defective Check if a speed is displayed when
the cabin is moving.
The encoder pulses of the incremental encoder are parameterized incorrectly.
The brake does not open, i.e. motor is overloaded.
The motor produces too little torque because the converter was not adjusted to the motor correctly.
15.1.3 Overspeed
Triggered:
Actual speed is higher than V4 + 20 %
Causes and remedy:
Uncontrolled opening of the brake without converter activity.
Opening of traveling contactors during a travel operation.
Tachometer defective or fault signal injection on the tachometer lead .
15.1.4 Control Deviation
Triggered:
The deviation between the set and actual value is greater than 20 % of V4 for 3 seconds.
Causes and remedy:
Motor not adjusted to the converter correctly.
Motor overloaded.
Converter too small.
Main supply voltage too low.
Compare system data with motor type plate.
15.1.5 Overcurrent
Triggered:
Current value exceeds the maximum converter current.
Causes and remedy:
Short-circuit in the converter output circuit, e.g. due to motor damage or wrong wiring.
Check wiring
Measure motor.