Rockwell powerflex 700h, Service Manual

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Troubleshooting and Error Codes 1-17
Common Drive Conditions
and Corrective Actions
No Output Voltage
The drive has no output voltage to the motor, even though the drive
indicates that the motor is running.
114 AutoT Enable Autotune is enabled but has not
started. Press the Start key within 20 seconds
of enabling autotune.
120 I/O Change An option board has been replaced. Reset the fault.
121 I/O Comm Loss An I/O Board lost communications
with the Main Control board. 1. Check the connector.
2. Check for induced noise.
3. Replace I/O board or Main Control
board.
No. Name Description Action (if appropriate)
Diagnostic Procedure Corrective Action
1. Measure the DC bus voltage. If the DC bus is not within specification, repair or
replace the Rectifying module as needed.
Otherwise, continue with step 2.
2. Measure the AC output voltage at the motor
terminals using a VAC RMS meter and
compare the measurement to the AC output
voltage displayed on the HIM (Par 307 [Output
Voltage] for 700S drives, Par 6 [Output Voltage]
for 700H drives).
If the AC output voltage at the motor terminals
does not match the output voltage displayed on
the HIM, repair or replace the Output Power
modules as needed.
Otherwise, continue with step 3.
3. Verify that there are no loose or missing
connections between the Gate Driver board
and ASIC board and the Gate Driver board and
Adapter board.
If there are loose or missing connections, or a
board has been damaged, replace the loose or
missing connections, or repair or replace any of
the boards as needed.
Otherwise, continue with step 4.
4. Complete the “Conducting Forward and
Reverse Biased Diode Tests for Major Power
Components” on
page 2-3 for the Output Power
modules.
If the test is not completed successfully, replace
the Output Power modules.
Otherwise, continue with step 5.
5. Check the motor windings and motor cables
with a high resistance DVM (megger).
Repair or replace the motor as needed.
!
ATTENTION: The sheet metal cover and mounting screws on the
ASIC board located on the power structure are energized at (-) DC bus
potential high voltage. Risk of electrical shock, injury, or death exists if
someone comes into contact with the assembly.