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

RTD, ohms and Thermocouple, mV Cards LEDs

The following table describes the LEDs for the RTD, ohms and Thermocouple, mV cards.

Table: RTD, ohms and Thermocouple, mV Cards LEDs
LED Correct Operating Condition Fault Indication Possible Cause Corrective Action
Green – Power On 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 – Error Off On (continuous) 1. Controller is not scanning card. 1. Check controller operation.
2. Unit failed self-test. 2. Contact technical support.
Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Address conflict. 2. Replace card with known good card of same type; contact technical support.
Yellow – Ch. 1 to Ch. 8 On Off 1. Channel not configured. 1. Enable channel and download card.
2. Internal fault. 2. Contact technical support.
Flashing 1. Invalid configuration. 1. Check configuration.
2. Input is out of range. 2. Check input source and connections.
3. Internal fault. 3. Contact technical support.
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