GE AV-300i - Manual (Page 28)

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Motor accelerates immediately to maximum speed
Reference set via analog input: Check whether the signal varies from min. to max.
Potentiometer used for reference: Is there a 0V (common) connection present?
Encoder not connected, or incorrectly connected.
Select the Enc 1 speed parameter in the MONITOR \ Measurement \ Speed \ Speed in rpm
menu.
- With the regulator disabled, manually turn the motor clockwise (viewed from the front of
the shaft). The value indicated must be positive.
- If the indicated value does not change or if random values are shown, check the power
supply and the cabling to the encoder
- If the indicated value is negative, reverse the encoder connections. Exchange channel
A+ and A- or B+ and B-.
Motor accelerates too slowly
Ramp value incorrectly set
Motor running at max. current
- Motor overloaded
- Drive sized too small
- Incorrect V/f characteristics set
Motor decelerates too slowly
Ramp value incorrectly set
Motor turns slowly, although reference value = Zero
Minimum speed parameter selected
Interference due to unused analog input. Remedy: set unused analog inputs to OFF
Disconnect reference on the analog input
- If drive now stands still, the effect is due to the cable resistance of the 0V (common) leg.
- Use the offset compensation on the analog input. Set Offset input xx parameter so that
the drive stands still.
Output voltage oscillates under load
The value for Rotor resistance is not correct. See section “Checking and manual tuning of
rotor resistance for field oriented mode” in the AV-300i instruction book.
Motor not supplying the maximum torque or maximum output power
The value for Magnetizing curr is less than required for the connected motor.
- The ratio Output voltage / Output frequency in the MONITOR / Measurements menu
should be approx equal to the ratio of Base voltage / Base frequency
- Drive working at current limit
- Check whether the value for Full load curr in the CONFIGURATION menu is correctly
set
- Check the value for the current limit
- The value for Magnetizing curr and/or Rotor resistance parameters is not correct.
Optimize the tuning as described in the instruction book.