What it means
F49153 is raised when the drive converter's cooling unit signals that the cooling liquid flow is too low. The cooling unit returns a flow feedback signal to the converter, and the drive watches this signal at two moments: after the ON command it must arrive within the starting time set in p0260, and during operation it must not fail for longer than the delay time set in p0263. If either condition is violated, the converter trips on this fault. The manuals for all listed families describe the condition identically, so the same explanation applies regardless of the converter.
Why it appears
- After the ON command, the flow feedback signal from the cooling unit was not received within the selected starting time (p0260).
- During operation, the flow feedback signal failed for longer than the permitted failure time (p0263).
What to check
- Check the wiring between the cooling unit and the input terminal (Terminal Module).
- Check the external control device for the cooling unit.
Parameters the manual names
- p0260 — Cooling unit starting time 1 (RKA start time 1): the starting time after the ON command within which the flow feedback must be received; if it is not, this fault follows.
- p0263 — Cooling unit fault liquid flow delay time (RKA flow t_del): how long the flow feedback may fail during operation before the drive raises this fault.
Acknowledging and restarting
The drive coasts down (OFF2). Once the cause has been removed, the fault must be acknowledged immediately; the converter can then be switched on again with a new ON command.
The same on every family
Every manual that describes F49153 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | IMMEDIATELY | Auxiliary unit faulted (20) | None | SINAMICS S120, S150 List Manual · p. 3288 |
| G130, G150 | OFF2 | IMMEDIATELY | Auxiliary unit faulted (20) | None | SINAMICS G130, G150 List Manual · p. 1932 |
The drives this code lives on
F49153 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 fault F49153 mean on a SINAMICS drive?
The cooling unit reports that the cooling liquid flow is too low. Either the flow feedback signal was not received within the starting time p0260 after the ON command, or it failed during operation for longer than the delay time p0263.
How do I clear F49153?
Check the wiring between the cooling unit and the input terminal (Terminal Module), and check the external control device for the cooling unit. The drive coasts down on OFF2; acknowledge the fault immediately after removing the cause, then restart with ON.
Which parameters belong to F49153?
p0260, the cooling unit starting time 1, and p0263, the cooling unit fault liquid flow delay time. Both define the time windows in which the flow feedback must be present.
Does F49153 also occur on G130 and G150?
Yes. The G130/G150 and S120/S150 manuals describe the same condition with identical causes, remedy and timing parameters.
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 F49xxx group · SINAMICS manuals · Siemens manuals