￭ Control unit LEDs
IndicationColorLED
Battery voltage of the real-time clock is OK (higher than 2.8 V).
When the LED is not lit,
GreenBATT OK
• battery voltage is below 2.8 V,
• the battery is missing, or
• the control unit is not powered.
Internal voltage OKGreenPWR OK
The control program indicates that the equipment is faulty. See
the appropriate firmware manual.
RedFAULT
Writing to SD card in progress.YellowWRITE
Maintenance 77
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