Section 1
General Information
5-8 Troubleshooting MN715
Table 5-3 Troubleshooting Continued
INDICATION POSSIBLE CAUSE CORRECTIVE ACTION
New Base ID Replaced Control or circuit board. Restore parameters to factory settings.
Reset control.
No Display Lack of input voltage. Check input power for proper voltage.
Loose connections. Check input power termination.
Verify connection of operator keypad.
Adjust display contrast. See Adjust Display Contrast.
NV Memory Fail Memory fault occurred. Press “RESET” key on keypad. Restore parameter values to factory
settings. If fault remains, call Baldor.
3 Sec Overload Peak output current exceeded 3 sec
rating. Check PK Current Limit parameter in the Level 2
Output Limits block.
Check motor for overloading.
Increase ACCEL time.
Reduce motor load.
Verify proper sizing of control and motor.
1 Min Overload Peak output current exceeded 1
minute rating. Check PK Current Limit parameter in the Level 2
Output Limits block.
Check motor for overloading.
Increase ACCEL/DECEL times.
Reduce motor load.
Verify proper sizing of control and motor.
Over Speed Motor exceeded 110% of MAX
Output Freq parameter value. Check Max Output Freq in the Level 2 Output Limits block.
Param Checksum Memory fault occurred. Press “RESET” key on keypad. Restore parameter values to factory
settings. If fault remains, call Baldor.
Regen RES
Power Incorrect dynamic brake parameter. Check Resistor Ohms and Resistor Watts parameters in the Level 2 Brake
Adjust block.
Regen power exceeded dynamic
brake resistor rating. Add external dynamic braking assemblies: RGA resistor kit or RBA
transistor assembly.
Increase Decel Time.
Unknown Fault
Code Microprocessor detected a fault that
is not defined in the fault code table. Press “RESET” key on keypad. Restore parameter values to factory
settings. If fault remains, call Baldor.
Unstable Speed Oscillating load.
Unstable input power.
Slip compensation too high.
Correct motor load.
Correct input power.
Adjust slip compensation.
uP Reset A software watchdog timer has
reset the processor because a
process has timed out.
Press “RESET” key on keypad. If fault remains, call Baldor.
FLT Log MEM
Fail Corrupt data in fault log (may occur
on older systems only). Press “RESET” key on keypad. If fault remains, call Baldor.
Current SENS
FLT Failure to sense phase current. Press “RESET” key on keypad. If fault remains, call Baldor.
Bus Current
SENS Failure to sense bus current. Press “RESET” key on keypad. If fault remains, call Baldor.