19. Board Diagnostic LED’s
Description of the diagnostic LEDs
Ref. Description (LED
color)
Comment
1
POWE R BAD (red) In norm al condition this LED does not lit up. In case this LED lit up and the POWE R CTRL BAD
LED remains off then there is probably a problem (voltage too low) with the +12V from the
Switched mode power s upply and/or w ith one of the local generated power s ource +2.5V and 3.3V
on the Switched mode power supply.
2 POWER CTRL BAD
(red)
This LED lit up in case:
• the standby voltage ++12V form the Switched mode p ower supply is to low.
• the white CONTROL wire unit is disconnected from the Switched mode power supply.
• the Switched mode power supply is defect (signal with mains frequency is missing).
3 +12V Main (green) This LED lit up in normal condition and indicates that the
3 +12V STBY (green) This LED lit up in normal condition and indicates that the ++12V standby from the Switched mode
power supply is available.
R5905312 HDF W SERIES 24/01/2013 313
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