Warning Z1 High pressure sensor JR1 open circuit — High pressure sensor voltage below 0.5 V DC

What does 5438 mean?

This warning indicates that the voltage on terminal 16 on the I/O module is below 0.5 V DC. This typically suggests a poor connection, a defective pressure sensor JR1, or a faulty I/O module.

• Poor connection in cabling or terminal 16,18 on the I/O module.
• Defective pressure sensor JR1.
• Defective I/O module.

Click steps to track your progress.

1. 1

   Check the cabling and terminal connections (16 and 18) on the I/O module, ensuring they are secure.

2. 2

   If the warning persists, contact a qualified technician to measure voltage between terminals 18 and 16 with the sensor disconnected.

3. 3

   Do not attempt to replace sensors or I/O modules yourself unless you are a qualified installer.