Rockwell Automation 21G PowerFlex 750-Series AC Drives Programming Manual - Manual (Page 334)

334 Rockwell Automation Publication 750-PM001J-EN-P - October 2014
Chapter 6 Troubleshooting
11113
11213
11313 C1 TVSS Blown
C2 TVSS Blown
C3 TVSS Blown Alarm 1 The MOV block is reporting that the transient voltage suppression
system (TVSS) has blown.
• Check the MOV wiring harness for loose connections and/or damage
and replace if necessary.
• Replace the MOV block.
• If the MOV block is not blown and the wiring harness is properly
connected and not damaged, replace the converter gate firing board.
11114
11214
11314 C1 Blower Speed
C2 Blower Speed
C3 Blower Speed Alarm 1 The converter cooling fan is running below normal operating speed.
• Check for debris in the fan. If necessary, clean the fan and housing.
• Check for noise at the fan, indicating motor bearing failure.
• Verify that the fan power and feedback connections are not loose or
disconnected.
• Replace the fan, if necessary.
11115
11215
11315 C1 Line Dip
C2 Line Dip
C3 Line Dip Alarm 1 Y The bus voltage has fallen below the value specified in P451 [Pwr Loss A
Level] or P454 [Pwr Loss B Level] (port 0) minus 20 volts. Until the
converter has established communications with the main control board,
this value defaults to 180V below the converter bus memory. The
converter stops firing the SCRs until the nominal value of the DC bus
voltage for the present AC line voltage is within 60 volts of P12 [DC Bus
Memory] (port 0). If the line dip condition persists for more than 60
seconds the alarm becomes a fault.
• Verify the power wiring connections.
• Compare the actual DC bus voltage to the value displayed in [Cn DC
Bus Volt]. If the values are different, replace the converter gate firing
board.
Resettable
Fault Coast
11116
11216
11316 C1 Minimum Line
C2 Minimum Line
C3 Minimum Line Alarm 1 The AC line voltage is less than 280V (for a 400V class drive) / 400V (for a
600V class drive).
• The AC line voltage must exceed 320V / 440V in order to recover from
this alarm.
11117
11217
11317 C1 Line Freq
C2 Line Freq
C3 Line Freq Alarm 1 The measured line frequency is out of the range (below 40 Hz, or above
65 Hz). This alarm becomes a fault if the condition persists for more than
30 seconds.
• Check the incoming power line frequency.
• Check the wiring harness to the converter gate firing board for loose
connections and/or damage and replace if necessary.
• If the wiring harness is properly connected and not damaged,
replace the converter gate firing board.
Resettable
Fault Coast
11118
11218
11318 C1 Single Phase
C2 Single Phase
C3 Single Phase Alarm 1 The converter was intentionally powered up in single-phase mode with
only AC phase L1-L2 present. Intentional single-phase mode is only
detected at the initial application of AC line voltage. Application of 3-
phase voltage after the converter has entered single-phase mode will
result in the single phase alarm becoming a fault.
• Verify that only a single phase is applied to a drive in single-phase
mode.
Resettable
Fault Coast
11134
11234
11334 C1 Overcurrent
C2 Overcurrent
C3 Overcurrent Resettable
Fault Coast The peak AC input current has exceeded 3000A for five line cycles.
• Verify that the current transducers are connected.
• Check the wiring harness to the converter gate firing board for loose
connections or damage and replace if necessary.
• If the current transducers are properly connect and the wiring
harness for the gate firing board is OK, replace the converter gate
firing board.
• Check for an open SCR or DC bus short.
Event
No. Fault/Alarm Text Type Fault
Action Configuration
Parameter Auto
Reset Description/Action(s)