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Undervoltage Line voltage parameter incorrectly set. Remedy: set parameter correctly and then acknowledge
the failure via RESET*.
The incoming voltage to the power section of the device is too low due to:
- too low an AC input voltage or extreme line dips
- poor cable connections (e.g. terminals on contactor, choke, filter ... not properly tightened).
Remedy: check connections.
* To RESET the alarms press [Escape]. If Enable and Start commands are configured for terminal mode, remove
both commands before “Reset”. To RESET remove +24V potential from these terminals.
Note:
The RESET alarm operation can be also configured for a digital input.
Other faults
Failure Possible causes
Motor not turning Failure alarm is displayed: see above
Once the error has been corrected enter the failure Reset command
Keypad display is dark: AC voltage supply to terminals U1/V1/W1 missing or an internal fuse
is faulty
Enable and/or start command missing (Check configuration of the reg. terminals)
Drive not accepting commands: incorrect or wrong operating mode
Protective device ahead of the power supply has tripped: protective device incorrectly sized
or input jumper faulty
The analog input used for the reference value was not assigned or assigned incorrectly
Motor turning in the wrong direction
Polarity of the reference signal incorrect
Motor incorrectly connected. CAUTION: if the motor rotation is reversed, two encoder cables
(A+ and A- or B+ and B-) have to be reversed also.
Motor not reaching nominal speed
Drive is encountering a speed limit. Remedy: check Speed max amount, Speed max pos
and Speed max neg parameters
Drive working at current limit (LED Ilimit) Possible causes:
- Motor overloaded
- Inverter sized too small
- Incorrect V/f characteristics set
- T current lim reduction selected via Torque reduct parameter
The entered value for the number of encoder pulses is too high. Remedy: check the parameter
“encoder 1 pulses” and set the correct value.
An override signal is reducing the main reference value.
Remedy: check the configuration
Speed base value parameter set too low