Flash Technology
Revision A - 2/13/2020
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FAILURE SCENARIOS AND REMOTE TROUBLESHOO TING
A2D Values (additional details below table)
Recommended Replacement
1. High String Voltage & Low String Current
Single FH 270 Panel
2. Low String Voltage & Low String Current
Driver Assembly or Control Board
3. Normal String Voltage & Low String Current
Driver Assembly or Control Board
If string voltage is above normal and string current is minimal – This indicates the LED string has failed in
an open state and the flashhead panel should be replaced.
If string voltage is below normal and string current is below normal – This indicates driver assembly or
control board damage. The driver assembly or control board should be replaced.
If string voltage is normal and string current is below normal – This indicates driver assembly or control
board damage. The driver assembly or control board should be replaced.
Other situations may be attributed to a failure in the sensing circuitry, indicating the control board may
need to be replaced, instead of the driver assembly.
NOTE! If string voltage is below normal but string current is normal – There are shorted LEDs on that string.
This in itself does not warrant flashhead panel or board replacement. This is not an indication that more LEDs
will fail in the string.
Repair procedures are provided in Component Removal and Replacement.
