Allen-Bradley PowerFlex 700H Hardware Service Manual page 16

1-8 Troubleshooting and Error Codes
Over-Temperature Faults
Use this procedure to troubleshoot drive over-temperature faults (14 - Inv
Otemp Pend and 15 - Inv Otemp Trip in 700S or 8 - Heatsink OvrTemp and
9 - Trnsistr OvrTemp in 700H):
Check Surrounding
Air Temperature
No
Check Motor
Current and Load
Levels
No
Check PWM
Frequency
No
Check Fans and
Air Flow
Through the Drive
No
Check Power
Voltage on Fan
Inverters
Yes
Check Connection
Between ASIC
Board and Fan
Inverters
Yes
Check Fan
Inverter Outputs
on X1, X4 and X5
Yes
Check Fan Motors
for Short and
Open Circuits
Temperature
Exceeds Yes
Specification?
Current
Exceeds
Yes
Specification?
Frequency Too
High for Lead Length
Yes
and Surrounding
Temp?
Proper Space
No
At Inlet?
Yes
Airlflow
Yes
Blockages?
No
Fans
Running
Yes
Properly?
Power Voltage
No
Equals Bus
Voltage?
Connection
No
Good?
Output Equals
No
50 Hz / 220V rms?
Fan Motor has
Yes
Open or Short
Circuits?
No
Contact
Allen-Bradley
Drives
Technical
Support
Provide
Additional Airflow
or Air Conditioning
Reduce Load or
Procure a Drive
With a Higher
Rating
Lower PWM
Frequency
Remedy
Spacing at
Inlet
Remove
Air Flow
Blockages
Check Fan Inverter
Fuses (F1 and F2)
Repair
Connection
Replace
Fan Inverter(s)
Replace
Fan Motor(s)