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QO, QOB and HOM Arc Fault (CAFI) and Dual Function (DF) circuit breaker troubleshooting tips using Time Saver Diagnostics.

Product Line:
QO, QOB and Homeline Arc Fault (CAFI) and Dual Function (DF) circuit breakers.  White and Purple test buttons.
Does not apply to the older AFI breakers with Blue or Green test buttons.
Does not apply to GFI, EPD or EPE breakers with Yellow or Black test buttons.

Environment:
"Time Saver" diagnostic feature on products with date codes 1130 and higher.
Data Bulletin 0760DB0204 ``Determining the Cause of AFCI Tripping``
48840-248-01  QO and QOB combination arc fault breaker instructions that come with the breaker, includes the CAFI Fault Indication Procedure
48840-249-01  HOM combination arc fault breaker instructions that come with the breaker, includes the CAFI Fault Indication Procedure
HRB86114  Dual Function HOM instructions
HRB73152  Dual Function QO instructions

Cause:
Providing protection. Unwanted tripping.  Need to determine why the breaker is tripping.

Resolution:
NOTE: Read all cautions and warnings in the above literature, and on the product.  Electrical work and troubleshooting should be done by an authorized person.

CAFI and DF Fault Indication Procedure - Time Saver Diagnostics
  1. Place circuit breaker in O/OFF position.
  2. Firmly press and continue holding the ‘TEST’ button through Step 4.
  3. Move handle to I/ON position.
  4. Circuit breaker should trip at one of the following times.
Trips Instantly (less than 1 second) Fault to Ground Includes:
  • Arcing to ground
  • Shared neutral
  • Grounded neutral
  • Ground fault
Trips at 2.0 seconds Arc Fault Includes:
  • Parallel arc fault
  • Series arc fault
Trips at 5.0 seconds Procedure Complete Includes:
  • No Fault
  • Thermal overload
  • Short circuit
To reset Fault Indication:
  1. Perform the CAFI Fault Indication Procedure a total of 6 times
  2. Verify by performing CAFI Fault Indication Procedure with a trip at 5.0 seconds (Procedure Complete) result.
An automatic reset of Fault Indication will occur if the CAFI circuit breaker has been powered continuously for 27 days.
 
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