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

AO 8-Channel Card LEDs

The following table describes the LEDs for the pre-Series 2 and Series 2 AO, 8-channel 4–20 mA card and the AO, 8-channel, 4-20 mA, HART card.

Table: AO 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 Redundant:
  • Active - On
  • Standby - Flashing
Off 1. System power is not supplied to unit. Possible line power problems. 1. Check supply power and connections
2. Internal fault. 2. Contact technical support.
Red-Error Off pre-Series 2 and Series 2 On (continuous) 1. Unit failed self-test. 1. Contact technical support.
2. Controller is not scanning card. 2. Check controller operation
pre-Series 2 Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Unit failed self-test. 2. Contact technical support.
3. Address conflict. 3. Replace card with known good card of same type; contact technical support.
Redundant Series 2 Flashing 1. No bussed field power. 1. Check bussed field power and connections. Use the DeltaV Diagnostics Clear Saved Fault Information command when the problem is fixed.
2. Controller is not scanning card. 2. Check controller operation.
3. Hardware error. 3. Replace with known good card of same type; contact technical support.
Simplex Series 2 Flashing Controller is not scanning card. Check controller operation.
Yellow - Ch1. to Ch. 8 On Off 1. No output device (load) and channel is disabled. 1. Check output connections.
2. Bussed field power not supplied to unit.

2. Check bussed field power and communications.

3. Internal fault. 3. Contact technical support.
Flashing 1. No output device (load) and channel is enabled. 1. Check output connections.
2. Bussed field power not supplied to unit. 2. Check bussed field power and connections.
3. Channel is configured for HART, but there is no HART communication. 3. Check HART input source and connections.
4. Internal fault. 4. Contact technical support.

Refer to the Configuration manual in Books Online for more information on troubleshooting HART devices.