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Section 1
General Information
Troubleshooting 5-7MN722
Table 5-3 Converter Section Troubleshooting
INDICATION POSSIBLE CAUSE CORRECTIVE ACTION
Current Sense FLT Open circuit between control board
and current sensor or defective
current sensor.
Check control wires between control board and current feedback sensor.
DC Bus High Incorrect setting of converter bridge
parameter.
Check Bus Capacitance value of converter section parameters.
Decel rate too fast. Increase Decel time parameter setting.
DC Bus Low Input voltage too low. Monitor power line fluctuations with date and time imprint
to isolate power problem.
Check power line disturbances (sags caused by start up of
other equipment).
Use step up isolation transformer if needed.
GND FLT Improper wiring. Disconnect wiring between control and motor. Retry test.
If GND FLT is cleared, reconnect motor leads and retry the test.
Rewire as necessary.
Repair motor.
If GND FLT remains, contact Baldor.
High INIT CUR Incorrect phasing between input
power, filter assembly and line
reactors.
Check connections for proper phasing as detailed in Section 3 of this
manual.
ID:No Feedback Control board is installed on wrong
power base.
Change power base to one that has current feedback sensors.
INT Over-Temp Ambient temperature too high. Relocate control to a cooler area. Add cooling fans or air condition the
cabinet.
Drive overloaded. Verify proper sizing of control and motor. Correct loading of motor.
Cooling fans or air path is clogged. Clean fans and air path.
Ensure fans are operating.
Invalid Base ID Control does not recognize
converter power base.
Press “RESET” key on keypad. If fault remains, call Baldor.
Logic Supply FLT Power supply malfunctioned. Replace logic power supply.
Lost AB Phase Wire disconnected or phase lost. Check for input power on all 3 phases.
Check wiring and correct errors in all output wiring and wiring between
individual components on EK type controls. Press “RESET” key on
keypad. If fault remains, call Baldor.
Lost BC Phase Wire disconnected or phase lost. Check for input power on all 3 phases.
Check wiring and correct errors in all output wiring and wiring between
individual components on EK type controls. Press “RESET” key on
keypad. If fault remains, call Baldor.
Lost User Data Battery backed memory failure. Parameter data was erased. Disconnect power to control and
apply power (cycle power). Enter all parameters.
Cycle power. If problem persists, contact Baldor.
Low INIT Bus V Improper AC line voltage. Check input AC voltage level.
Memory Error EEPROM memory fault occurred. Press “RESET” key on keypad. If fault remains, call Baldor.
mP Reset
Power was cycled before Bus
voltage reached 0VDC.
Press “RESET” key on keypad.
Disconnect power and allow at least 5 minutes for
Bus capacitors to discharge before applying power.
If fault remains, call Baldor.
New Base ID Software parameters are not
initialized on newly installed
control board.
Press “RESET” key on keypad to clear the fault condition. Cycle power
(turn power OFF then ON). Refer to Section 4 and initialize new software.
Access diagnostics and compare power base ID number to list in Table
5-5 to ensure a match. Re-enter the Parameter Block Values you
recorded in the User Settings at the end of this manual. Autotune the
control. If fault remains, call Baldor.
Continued on next page.