The above text is describing different types of faults that can occur in a drive system and the actions that can be taken to reset the faults. There are three types of faults:

Auto-Reset: If the fault occurs and [Auto Rstrt Tries] is set to a value greater than 0, a timer begins, and the drive attempts to automatically reset the fault when the timer reaches zero.
Non-Resettable: This type of fault requires repair and can only be cleared after the cause of the fault is corrected and the system is powered up.
User Configurable: These faults can be enabled or disabled by the user, and the decision to annunciate or ignore the fault condition is configurable.

"Analog In Loss Fault 29", which occurs when a configured analog input experiences signal loss. To resolve the issue, the following steps are recommended:
Check the parameters set in [Anlg In X Loss] on page 64.
Check for broken or loose connections at the inputs.

"Anlg Cal Chksum F 108" fault, which occurs when the checksum read from the analog calibration data doesn't match the calculated checksum. The recommended resolution for this fault is to replace the drive.

 "Auto Rstrt Tries F 33" fault, which occurs when the drive unsuccessfully attempts to reset a fault and resume running for the programmed number of [Flt RstRun Tries]. The following actions can be taken to resolve the fault:
Enable or disable the fault with [Fault Config 1] on page 53.
Correct the cause of the fault and manually clear it.

"AutoTune Aborted F 80" fault, which occurs when the autotune function was cancelled by the user or a fault occurred during the process. To resolve the fault, the autotune procedure should be restarted.

"Cntl Bd overtemp F 55" fault, which occurs when the temperature sensor on the Main Control Board detects excessive heat. To resolve the issue, the following steps are recommended:
Check the Main Control Board fan.
Check the surrounding air temperature.
Verify proper mounting and cooling.

"Auxiliary Input F 2", where the auxiliary input interlock is open. To resolve the issue, the remote wiring should be checked.

"DB Resistance F 69" issue, where the resistance of the internal DB unit is out of range. To resolve the issue, the resistor should be replaced.

"Decel Inhibit F24" fault, which occurs when the drive is not following a commanded acceleration or deceleration because it is trying to limit bus voltage. To resolve the issue, the following steps are recommended:
Verify that the input voltage is within the drive's specified limits.
Verify that the system ground impedance follows proper grounding techniques.
Disable bus regulation and/or add a dynamic brake resistor and/or extend the deceleration time.

"Drive OverLoad F 64" fault, which occurs when the drive's rating of 110% for 1 minute or 150% for 3 seconds has been exceeded. To resolve the issue, the cause of the overload should be identified and addressed.

"Drive Powerup F 49" marker, which is not a fault. It is used to indicate in the Fault Queue that the drive power has been cycled. No action is required for this marker.

"Enable Hardware F 111" fault, which occurs due to a failure with the Safe-Off board or hardware enable circuitry. To resolve the issue:

If the Safe-Off board is not installed, install it or jumper pins 3 and 4.
If the Safe-Off board has failed, replace it.
If the hardware enable circuitry has failed, replace the control board.
If the Safe-Off board is installed, verify that the hardware enable jumper is removed and locate and remove the enable jumper on the main control board. Refer to publication PFLEX-UM003 for instructions and location.

"Encoder Loss F 91" fault, which occurs when one or both of the encoder channel signals are missing. To resolve the issue:

Check the wiring.
Replace the encoder.


"Encoder Quad Err 90" fault, which occurs when both encoder channels change state within one clock cycle. To resolve the issue:

Check for any externally induced noise.
Replace the encoder.

"Hardware Fault 93" error, which occurs when the hardware enable is disabled (jumpered high) but the logic pin is still low. To resolve the issue:

Check the jumper.
Replace the Main Control Board.

Check for excessive load on the motor, verify that the load is within the drive's rating, and make sure that the motor is capable of starting with the load attached.

Phase UV Short 41 Excessive current has been detected between
these two output terminals. 1. Check the motor and drive
output terminal wiring for a
shorted condition.
2. Replace drive.
Phase VW Short 42
Phase UW Short 43

A fault has been detected between two specific output terminals in the drive.

Check the motor and drive output terminal wiring for a shorted condition.
Replace drive.
A fault has been detected between two specific output terminals in the drive.

Check the motor and drive output terminal wiring for a shorted condition.
Replace drive.


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Port 1...5 DPI Loss 81...85: Communication loss with a DPI device connected to the specified port.

Check wiring to the port. Replace wiring, port expander, adapters, Main Control Board or complete drive if needed.
Verify HIM connection.
If adapter was disconnected intentionally, check the [Logic Mask] bit setting and set to 0 if needed.


Port 1...5 Adapter 71...75 The communications card has a fault. Check DPI device event queue and
corresponding fault information
for the device.

Check wiring connections.
Check the device, adapter,
or Main Control Board and
replace as required.

Faults Cleared 52 No fault displayed. Used as a marker in the Fault Queue indicating that the fault clear
function was performed
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+ PowerFlex 70 User manuals 

+ PowerFlex 70 Fault Codes 1 >>

+ PowerFlex 70 Fault Codes 2 >>

+ PowerFlex 70 Fault Codes 3 >>

+ Allen Bradley Homepage (second hand)

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