Siemens valve positioner fault codes and solutions

The Siemens valve positioner SIPART PS2 is the most widely used intelligent electric valve positioner that can be used for linear and angular travel valves. The Siemens valve positioner SIPART PS2 is the absolute leading product in the world valve positioner market. Its operation is very simple, it can be operated on the spot through buttons and LCD, and it can also be operated by using the SIMATIC PDM process equipment management software through the HART interface or the PROHBUS PA protocol. SIPART PS2 adds a variety of diagnostic functions, which can provide various information such as the status of the positioner and the valve, and the operating conditions. However, if any kind of instrumentation equipment is used for a long time, there will be some unexpected failures. The Siemens valve positioner SIPART PS2 is no exception. Today we will briefly talk about the common fault codes of Siemens valve positioner SIPART PS2 and how to solve them.

Fault code 1: SIPART PS2 stopped at RUN5 and did not reach FINISH (waiting time＞5min)

Fault analysis: Faults caused by the operation of the valve positioner, actuator, and accessories assembly.

Solution 1: Straight stroke actuator: Check the installation of the coupling wheel stud bolt.

Solution 2: Quarter-turn actuator: check the installation of the rod on the positioner shaft.

Solution 3: Correct other installations between the actuator and accessories.

Fault code 2: CPU test flashes on the display of the valve positioner SIPART PS2 (every 2 seconds)

Failure analysis: It is a failure problem caused by the piezoelectric valve not switching.

Solution analysis: There is water in the valve branch pipe (produced by wet compressed air), and the water in the valve branch pipe should be disposed of in time.

Fault code 3: The actuator cannot move in automatic or manual mode or only moves in one direction

Failure reason: the valve branch pipe contains water

Solution: In the initial stage, dry air can be used for step-by-step calibration (if necessary in a temperature cabinet of 50～70℃)