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CONTROLLER BOARD D7 LED
Indicates the status of the 5VDC power supply. Normal operation is ON. If not on:
Possible Cause
Correction Action
Faulty ribbon cable
Replace ribbon cable
Faulty power supply
Replace power supply
CONTROLLER BOARD D5 LED
Indicates the status of the 3.3VDC power supply. Normal operation is ON. If not on:
Possible Cause
Correction Action
Faulty ribbon cable
Replace ribbon cable
Faulty power supply
Replace power supply
I/O BOARD LEDs
Indicates the status of the sensor board. Blinks slowly for several seconds during power-up. Normal operation is OFF. If not behaving
this way:
Possible Cause
Corrective Action
Sensor card locked up
Try a power cycle to reset it
Sensor card not seated correctly
Unplug the card and plug it back in
Ribbon cable not seated correctly
Unplug the ribbon cable at each end and plug it back in
Faulty ribbon cable
Replace ribbon cable
Faulty sensor card
Replace sensor card
RELAY BOARD D3 LED
Indicates the status of the 12VDC power supply. Normal operation is ON. If not on:
Possible Cause
Correction Action
Faulty power supply cable
Replace ribbon cable
Replace power supply
RELAY BOARD D2 LED
Indicates the status of the 3.3VDC power supply. Normal operation is ON. If not on:
Possible Cause
Correction Action
Faulty power supply cable
Reseat or replace cables
Faulty power supply
Replace power supply