Hi everyone,
As I understand the problem, the soft-starters, motors, and pumps start and run normally. Intermittently, as the pump is turned off the Soft-Start trips on a fault code for "faulty power module" with a secondary possible problem of "faulty unit".
The system uses a 600:120 V PT and a 120 V to 24 Vdc converter to power the starter.
There are two (alternating) identical pumps both experiencing the same symptoms without any apparent pattern.
About 12 feet above the sewage pumps are symmetrical pinch valves for each pump, so there is a possibility of some reverse flow of the motor and perhaps some back feed as a result.
I've never seen a situation like this where the problem is so random.
The big question, is the power supply or the soft-starter affected by reverse flow of liquid in the pipes?
Have intermittent problems like this come up in the past?
Should the starter be replaced based on this symptom?
Please provide any suggestions you may have or forward on to help me dig out a solution. All you help is appreciated
thank you
As I understand the problem, the soft-starters, motors, and pumps start and run normally. Intermittently, as the pump is turned off the Soft-Start trips on a fault code for "faulty power module" with a secondary possible problem of "faulty unit".
The system uses a 600:120 V PT and a 120 V to 24 Vdc converter to power the starter.
There are two (alternating) identical pumps both experiencing the same symptoms without any apparent pattern.
About 12 feet above the sewage pumps are symmetrical pinch valves for each pump, so there is a possibility of some reverse flow of the motor and perhaps some back feed as a result.
I've never seen a situation like this where the problem is so random.
The big question, is the power supply or the soft-starter affected by reverse flow of liquid in the pipes?
Have intermittent problems like this come up in the past?
Should the starter be replaced based on this symptom?
Please provide any suggestions you may have or forward on to help me dig out a solution. All you help is appreciated
thank you