GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 355)

DV-300 Adjustable Speed Drives
——— TROUBLESHOOTING ———
8
5
Other faults
FAILURE POSSIBLE CAUSES
The motor is not turning
Failure alarm is displayed: see table above
Once the error has been rectified give the RESET command
Keypad display is dark: voltage supply to terminals U2/V2 missing or internal fuse
blown or missing
Enable and/or start command missing
Converter not accepting commands: incorrect or wrongly selected operating mode
Protective device of the power supply has tripped: protective device incorrectly sized
or fault on the thyristor bridge
The analog input used for the reference value was not assigned or assigned differ-
ently
Negative reference with 6KDV3 ... Q2. The reference for the biquadrant converters
must always be positive!
The motor is turning in a wrong way
Wrong polarity of the reference sign (with 6KDV3 ... Q4)
The motor is connected in a wrong way.
ATTENTION: when the motor turns in a wrong way but the rotation direction can be
changed, remember to change both the armature or field conductors and the two encoder
connections (A+ with A- or B+ with B-). Using a tachometer change the conductor
polarity.
The motor does not reach the rated speed
Drive is within speed limitation. Remedy: check Speed max amount, Speed max pos
and Speed max neg parameters
Drive working at current limit (LED I
Limit
lit) Possible causes:
Motor overloaded
Converter sized too small
Flux reduction selected via Torque reduct
The entered value for the number of encoder pulses is too high. Remedy: check the
parameters concerned (Encoder 1 pulses when using plug connector XE1 or Encoder
2 pulses with plug connector XE2) and set correct value.
Wrong adaptation of the tachometer voltage. Check the voltage field choice (jumpers
to the terminals A/B/C). Check the Tacho scale parameter.
A correction value reduces the main reference value. Remedy: check the configuration
The factor function is set incorrectly.