142 Rockwell Automation Publication 2198-UM001D-EN-P - May 2014
Chapter 7 Troubleshooting the Kinetix 5500 Drive System
FLT S18 – CONV OVERTEMP FL
Converter OverTemp
Factory Limit Fault
The measured converter temperature has exceeded
the factory set temperature limit.
• Reduce acceleration times of all drives sharing the DC bus
• Reduce number of shared DC follower drives
• Modify the command profile to reduce speed or increase time
• Reduce drive ambient temperature
• Verify airflow through drive is not obstructed
FLT S20 – CONV OVERLOAD FL
Converter Thermal Overload
Factory Limit Fault
The converter thermal model indicates that the
temperature has exceeded the factory set capacity
rating of 110%.
• Reduce acceleration times of all drives sharing the DC bus
• Reduce number of shared DC follower drives
• Reduce duty-cycle of commanded motion
FLT S21 – CONV OVERLOAD UL
Converter Thermal Overload
User Limit Fault
The converter thermal model indicates that the
temperature has exceeded the limit given by
Converter Thermal Overload User Limit.
• Reduce acceleration times of all drives sharing the DC bus
• Reduce number of shared DC follower drives
• Reduce duty-cycle of commanded motion
• Increase the Converter Thermal Overload UL attribute value
FLT S23 – AC PHASE LOSS AC Single Phase Loss Fault
A single AC input phase was lost while the drive was
enabled.
Check AC input voltage on all phases.
FLT S25 – PRECHARGE FAILURE Pre-charge Failure Fault
The pre-charge circuit monitoring algorithm detected
that the DC bus did not reach a factory set voltage
level after charging for a period of time.
• Check AC input voltage on all phases
• Check input power wiring
• Replace drive if fault persists
FLT S29 – BUS REG OVERLOAD FL
Bus Regulator Thermal Overload
Factory Limit Fault
The shunt thermal model has exceeded its factory set
thermal capacity limit.
• Modify the duty cycle of the application
• Add external shunt for additional capacity
• Add capacitor module if needed
FLT S30 – BUS REG OVERLOAD UL
Bus Regulator Thermal Overload
User Limit Fault
The shunt thermal model has exceeded the thermal
capacity limit given by Bus Regulator Thermal
Overload User Limit.
• Modify the duty cycle of the application
• Add external shunt for additional capacity
• Increase the Bus Regulator Thermal Overload UL attribute value
• Add capacitor module if needed
FLT S31 – BUS REG FAILURE Bus Regulator Failure
The shunt driver IC has detected that the shunt
resistor is shorted.
• Check for shorts in the shunt connector
• Unplug the shunt connector and measure the resistance of the
shunt
• Replace drive if shunt resistor is shorted
FLT S33 – BUS UNDERVOLT FL
Bus Undervoltage
Factory Limit Fault
DC Bus voltage level is below the factory set limit as
determined by the configured input voltage.
• Verify voltage level of the incoming AC
• Monitor AC power source for glitches or line droop
• Install UPS on AC input
FLT S34 – BUS UNDERVOLT UL
Bus Undervoltage
User Limit Fault
DC Bus voltage level is below the user set limit as
given by Bus Undervoltage User Limit.
• Verify voltage level of the incoming AC
• Monitor AC power source for glitches or line droop
• Install UPS on AC input
• Increase Bus Undervoltage UL attribute value
FLT S35 – BUS OVERVOLT FL
Bus Overvoltage
Factory Limit Fault
DC Bus voltage level is above the factory set limit as
determined by the configured input voltage.
• Change the deceleration or motion profile of all drives connected to
the DC bus
• Unplug the shunt connector and measure the resistance of the
shunt
• Replace drive if shunt resistor is open
FLT S39 – BUS POWER LEAK
Bus Power Leakage Fault
Measured converter power exceeded estimated
inverter output power by more than a factory limit.
• Check bus power sharing configuration attribute
• Check AC input and DC bus sharing connections
FLT S45 – FDBK COMM FL
Motor Feedback Data Loss
Factory Limit Fault
The number of consecutive missed or corrupted serial
data packets from the intelligent feedback device has
exceeded a factory set limit.
• Check motor feedback cable and connector
• Check motor power cable and feedback wire shields are secured
correctly
• Check motor frame is grounded correctly
Table 56 - FLT Sxx Fault Codes (continued)
Exception Code on Display Exception Text Problem Possible Solutions
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