Fault Code: Be3-Brake Release Fault - Magnetek Impulse G+ series 4 Instruction Manual

coupling (depending on the type of encoder used). If the pulse wheel is misaligned or the shaft
coupling is loose the drive may get erratic pulse signals possibly causing a BE2 fault. Repairs to
the encoder wheel or shaft coupling should be made immediately before again attempting to
operate the hoist.
4. Perform a Brake Torque test to verify the braking torque compared to the brake specifications
before proceeding.
5. If none of the above steps has identified a valid problem(s), the brake may need to be replaced.
NOTE: It is desirable to have the Current Feedback Timer set as low as possible without causing
nuisance trips.
Fault Code: BE3–Brake Release Fault
Definition
The BE3 fault indicates that the drive has released the brake and commanded the drive to run, but
has not detected the expected encoder feedback. A BE3 fault will occur if the pulses received during
the BE3 detection time (C08-06) are less than the expected number of pulses (C08-07).
NOTE: Depending on the condition of the crane and control system, the load may drift during the
BE3 detection time until the brake is again set. If giving a run command, the BE3 fault
should be detected before a PGO fault would be detected.
Corrective Action
1. Check the brake for proper operation. If the brake does not open the drive will not see the proper
number of encoder pulses returned and will post this fault.
2. Check the alignment of the encoder pulse wheel with the sensor head, or the encoder shaft
coupling (depending on the type of encoder used). If the pulse wheel is misaligned or the shaft
coupling is loose the drive will get erratic pulse signals or no signals at all possibly causing a
BE3 fault. Repairs to the encoder wheel or shaft coupling should be made immediately before
again attempting to operate the hoist.
3. If the encoder appears to have no mechanical problems, the encoder cable should be checked
for damage and replaced if a problem is found.
3.1 Each of the encoder wires should be checked for continuity.
3.2 The wires should be checked for shorts between any two wires.
3.3 The wires should be checked for shorts to the shield or ground.
3.4 Visually inspect the cable for damage that may be causing intermittent problems.
4. If none of the above steps has identified a valid problem(s), only then should the BE3 detection
parameters be adjusted.
NOTE: It is desirable to have as fast a fault reaction time as possible without causing
nuisance trips.
5. Ensure that C08-04 is equal to the brake's mechanical delay time.
6. Increase the value of C08-06 to no more than 1 second.
7. Decrease the value of C08-07 to no less than 10 pulses.
IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
6-19