Instruction Manual

Troubleshooting 4-5
PowerFlex 400 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22C-UM001I-EN-P
Motor does not Start.
No. Fault
Type
(1)
Description Action
F81 Comm Loss
➁
RS485 (DSI) port stopped
communicating.
1. Check RS485 wiring connection.
2. Check if a communications adapter
or HIM was disconnected.
3. Increase C106
[Comm Loss Time]
to an appropriate time for
application.
4. Change C105
[Comm Loss Action]
to a value other than “0” (fault), if
appropriate for the application.
F94 Function Loss
➁
P036 [Start Source] is set to
setting 6. The input to terminal
01 has been opened.
Close input to terminal 01 and re-start
the drive.
F100 Parameter
Checksum
➁
The checksum read from the
board does not match the
checksum calculated.
Set P041 [Reset To Defalts] to option 1
“Reset Defaults”.
F122 I/O Board Fail
➁
Failure has been detected in
the drive control and I/O
section.
1. Cycle power.
2. Replace drive if fault cannot be
cleared.
(1)
See page 4-1 for a description of fault types.
Common Symptoms and Corrective Actions
Cause(s) Indication Corrective Action
No output voltage to the motor. None Check the power circuit.
• Check the supply voltage.
• Check all fuses and disconnects.
Check the motor.
• Verify that the motor is connected properly.
Check the control input signals.
• Verify that a Start signal is present. If
2-Wire control is used, verify that either the
Run Forward or Run Reverse signal is
active, but not both.
• Verify that I/O Terminal 01 is active.
• Verify that P036
[Start Source] matches
your configuration.
• Verify that A166
[Reverse Disable] is not
prohibiting movement.
Drive is Faulted Flashing red status
light
Clear fault.
• Press Stop
• Cycle power
• Set A197
[Fault Clear] to option 1 “Clear
Faults”.
• Cycle digital input if T051
- T054 [Digital
Inx Sel] is set to option 7 “Clear Fault”.