Common Fault Codes and Troubleshooting Methods for Yokogawa EJA110E Differential Pressure Transmitter

AL.01 cap.err

Indicates a sensor failure.

Possible causes include:

• Diaphragm capsule temperature sensor failure
• Diaphragm capsule EEPROM failure

Corrective actions:

• Replace the diaphragm capsule
• If the issue persists after restarting the device, further inspection or replacement of the relevant components is required

AL.10 press
Indicates that the input pressure exceeds the measurement range limit of the diaphragm capsule.
Possible cause:

• Differential pressure signal exceeds the specified range

Corrective actions:

• Check the input pressure signal
• Replace the diaphragm capsule if necessary

AL.30 range

Indicates that the output value exceeds the upper or lower range limits.

Possible causes:

• Incorrect range configuration
• Abnormal input signal

Corrective actions:

• Verify the range settings
• Adjust the configuration or check the input signal

AL.50 p.lrv

Indicates that the specified value is outside the configured range.

Possible cause:

• Incorrect lower range value (LRV) setting

Corrective action:

• Check and adjust the configuration

AL.60 sc.cfg

Indicates that the specification values or the settings defining the signal characterization function do not meet the current operating conditions.

Possible cause:

• Incorrect device configuration

Corrective action:

• Review and adjust the configuration settings