Table 14, “output phase, Table 15, “brake resistor, Table 16, “microprocessor – Rockwell Automation 20C PowerFlex 700H Drives Programming User Manual
Page 74: Table 17, “igbt temperature, Table 18, “fan cooling fault, Table 19, “communication bus

74
Rockwell Automation Publication 20C-PM001F-EN-P - March 2012
Chapter 3
Troubleshooting
Table 14 - Output Phase Missing Fault (F21) Subcode
Table 15 - Brake Resistor Missing Fault (F28) Subcodes
Table 16 - Microprocessor Watchdog Fault (F30) Subcode
Table 17 - IGBT Temperature Hardware Fault (F31) Subcodes
Table 18 - Fan Cooling Fault (F32) Subcodes
Table 19 - Communication Bus Fault (F34) Subcode
289
One input line phase in power unit 1 is missing.
305
One input line phase in power unit 2 is missing.
529
One input line phase in a regenerative power unit is missing.
Subcode
Description
273
There is zero current in one of the output motor phases in the power unit.
Subcode
Description
273
No brake resistor has been detected (typically frame 9 drives).
Subcode
Description
322
A microprocessor watchdog timeout has occurred on the Control board.
Subcode
Description
272, 273
The output current has exceeded the instantaneous current limit in the power unit.
275
The output current has exceeded the instantaneous current limit in the U phase of the power unit (typically
frame 11 and 13 drives).
276
The output current has exceeded the instantaneous current limit in the V phase of the power unit (typically
frame 11 and 13 drives).
277
The output current has exceeded the instantaneous current limit in the W phase of the power unit
(typically frame 11 and 13 drives).
288, 289
The output current has exceeded the instantaneous current limit in power unit 1 (typically frame 12 and 14
drives).
291
The output current has exceeded the instantaneous current limit in the U phase of power unit 1 (typically
frame 14 drives).
292
The output current has exceeded the instantaneous current limit in the V phase of power unit 1 (typically
frame 14 drives).
293
The output current has exceeded the instantaneous current limit in the W phase of power unit 1 (typically
frame 14 drives).
304, 305
The output current has exceeded the instantaneous current limit in power unit 2 (typically frame 12 and 14
drives).
307
The output current has exceeded the instantaneous current limit in the U phase of power unit 2 (typically
frame 14 drives).
308
The output current has exceeded the instantaneous current limit in the V phase of power unit 2 (typically
frame 14 drives).
309
The output current has exceeded the instantaneous current limit in the W phase of power unit 2 (typically
frame 14 drives).
Subcode
Description
273
The fan(s) in the power unit does not work according to feedback information.
289
The fans in power unit 1 does not work according to feedback information (typically frame 12 and 14
drives).
305
The fans in power unit 2 does not work according to feedback information (typically frame 12 and 14
drives).
Subcode
Description
338
A sent message was not acknowledged.
Subcode
Description