TROUBLE SHOOTING GUIDE (CONT.)
1
13
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 dealer.
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 dealer.
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 dealer.
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 dealer.
FLT Log MEM
Fail
Corrupt data in fault log (may occur
on older systems only).
Press “RESET” key on keypad. If fault remains, call dealer.
Current SENS
FLT
Failure to sense phase current.
Press “RESET” key on keypad. If fault remains, call dealer.
Bus Current
SENS
Failure to sense bus current.
Press “RESET” key on keypad. If fault remains, call dealer.
