hager RCBO-AFDD ARC Fault Detection Device User Guide
- June 9, 2024
- hager
Table of Contents
hager RCBO-AFDD ARC Fault Detection Device
Product Information
The product being discussed in this manual is an RCBO-AFDD or MCB-AFDD. It is designed to protect electrical circuits from arc faults, residual current faults, overloads, and short circuits. The device has a test button and LED indicators to help with troubleshooting. The product is manufactured by Hager LTD in the United Kingdom.
Product Usage Instructions
- If the AFDD has tripped, perform a diagnostic by following the steps below:
- Switch off the AFDD.
- Press the test button.
- Check the status of the LED using Table 1 in the manual.
- Check the status of the yellow flag.
- If the LED is off, check the power supply voltage and/or connection to the AFDD. If voltage is okay, replace the AFDD. If voltage is below 216V or above 253V, assume an internal AFDD error.
- If the LED is blinking yellow, assume an overvoltage issue and check the electrical installation and/or power supply.
- If the LED is steady yellow, perform standard electrical troubleshooting and check for short circuits or overloads.
- If the LED is steady red, assume a residual current fault (only for RCBO-AFDD) and switch off load. Perform standard electrical troubleshooting and contact technical support if necessary.
- If the LED is blinking red/yellow, check fixed cables of the installation and appliances.
- If the LED is blinking red, assume a parallel arc fault and disconnect all appliances. Measure insulation resistance and identify the fault. If necessary, replace involved appliances or perform firmware update.
- If the LED is blinking red/green with yellow flag absence, assume AFDD has manually tripped. Check for short circuit or overload and perform standard electrical troubleshooting.
- If the LED is blinking red/green with yellow flag presence, assume AFDD has manually tripped. Check for short circuit or overload and perform standard electrical troubleshooting.
- If the LED is blinking yellow, assume an internal failure and contact technical support.
What to do if the AFDD has tripped?
Customer:
Date:
Circuit:
Connected load:
Safety
The outgoing lines may only be connected or disconnected in a de-energized
state.
Perform a diagnostic
LED color-codes 
Troubleshooting
AFDD troubleshooting
Standard electrical troubleshooting
Arc fault troubleshooting
Hager technical support: +441952675689
technical@hager.co.uk
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