What it means
A49172 is the alarm for the cooling unit's conductivity monitoring: the actual value of the cooling liquid's conductivity is not valid. When the drive monitors the conductivity of the cooling liquid, it has found a fault in the wiring or in the sensor of this monitoring. The alarm is described the same way for the G130, G150, S120 and S150 product lines, so one set of checks applies to all of them.
Why it appears
- A fault in the wiring of the conductivity monitoring.
- A fault in the sensor that measures the conductivity of the cooling liquid.
What to check
- Check the wiring between the cooling unit and the Power Stack Adapter (PSA).
- Check the function of the sensor that measures the conductivity.
Acknowledging and restarting
This alarm requires no acknowledgement, and the drive takes no protective reaction when it raises it. The manual describes no reset or restart step for this code — the remedy consists of the two checks above.
The same on every family
Every manual that describes A49172 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Auxiliary unit faulted (20) | None | SINAMICS S120, S150 List Manual · p. 3290 |
| G130, G150 | NONE | NONE | Auxiliary unit faulted (20) | None | SINAMICS G130, G150 List Manual · p. 1933 |
The drives this code lives on
A49172 is described for G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A49172 mean?
It reports that the conductivity actual value of the cooling unit is not valid. While the drive monitors the conductivity of the cooling liquid, it has detected a fault in the wiring or in the sensor.
How do I fix alarm A49172?
Check the wiring between the cooling unit and the Power Stack Adapter (PSA), and check the function of the sensor that measures the conductivity. These are the two checks the manual gives for this alarm.
Does A49172 have to be acknowledged?
No. The drive raises the alarm without a protective reaction, and no acknowledgement is required.
Which drives report A49172?
The alarm is described for the G130, G150, S120 and S150 product lines, and the manuals give the same cause and remedy for all of them.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A49xxx group · SINAMICS manuals · Siemens manuals