Checking Out and Troubleshooting Your DeltaV System > Checking Out Your System > Step 3. Checking the LED Indicators on Each Device

DO 8-Channel Card LEDs

Table: DO 8-Channel Card LEDs
LED Correct Operating Condition Fault Indication Possible Cause Corrective Action

Green-Power

Green Power/Active

  • pre-Series 2 - On
  • Series 2 Simplex - On
  • Series 2 Redundant:
    • Active - On
    • Standby - Flashing
Off 1. System power is not supplied to unit. Possible line power problem. 1. Check supply power and connections.
2. Internal fault. 2. Contact technical support.
Red Off pre-Series 2 and Series 2 On (continuous) 1. Controller is not scanning card. 1. Check controller operation.
2. Unit failed self-test. 2. Contact technical support.
pre-Series 2 Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Address conflict. 2. Replace with known good card of same type; contact technical support.
Series 2 Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Hardware error. 2. Replace with known good card of same type; contact technical support.
Yellow - Ch. 1 to Ch. 8 Depends on setpoint and configuration.