Magnetek IMPULSE VG+ Series 3, Instruction Manual

Page: 153 / 183

IMPULSE•VG+ Series 3 Instruction Manual – 07/25/05
6-4
Drive Faults, Alarms and Indicators
Motor rotates, but at minimum speed only. 1. Check wiring of speed inputs.
2. Verify speed reference setting (A1-04).
3. Verify reference and run source settings are correct (B3-01, -02).
4. Verify reference priority setting (B1-18).
Motor RPM too high or too low. 1. Compare motor nameplate specifications with E1 parameter.
2. Check maximum frequency setting (E1-04).
3. Check minimum frequency setting (E1-09).
Symptom Corrective Action
Fault Code Fault or Indicator Name/Description Corrective Action
BB
(flashing)
Base Block
External Base Block Indicator. The flashing
base block signal is the result of a multi-
function input in the terminal strip. The base
block indicates that the drive’s IGBTs have been
disabled. The motor will begin coasting when
the base block input is received. If a RUN
command is still present when the BB signal is
removed, the output voltage will be restored to
the previous operating level and operation will
continue at the previously commanded
frequency.
1. Check constants H1-01 through H1-06 for
proper programming.
2. Check terminal status. (U1-10)
BE0
(flashing)
Brake Ans Lost
Brake answer back signal is lost during run.
While running, the multi-function input brake
answer back is lost.
1. Check brake answer back circuit.
2. Check terminal status. (U1-10)
BE1
Rollback detect
Torque Proving Fault. The BE1 fault indicates
that the drive has released the brake, but not
started to accelerate the motor when it detects
more than the expected encoder feedback. A
BE1 fault will occur if the pulses received
during the BE1 detection time (C8-04) are
greater then the expected number of pulses (C8-
05).
1. Please reference troubleshooting encoder
related faults on page 6-14.
BE2
No Current
Torque Proving Fault. Before the brake is
released, the drive’s current did not reach a
predetermined level within a predetermined
time.
1. Ensure the motor has been Auto-tuned
successfully.
2. If a powerlimit switch is used, ensure that the
switch is closed.
3. Decrease the values of C8-01 and C8-02 to no
less then .5 seconds.
NOTE: The values of C8-01 and C8-02 should
always remain equal.
4. Decrease the value of C4-02 to no less than 5.
5. Decrease the value of C8-16 to no less than
50.
BE3
Brake Release NG
Torque Proving Fault. The BE3 fault indicates
that the drive has released the brake and
commanded the drive to run, but it has not
detected the expected encoder feedback. A BE3
fault will occur if the pulses received during the
BE3 detection time (C8-06) are less than the
expected number of pulses (C8-07).
1. Please reference encoder related faults on
page 6-14.