A600 1730 - attention lioght is on - model 170

Hello midrangers,
for no apparent reason on of the 170s I take care of shows src
A6001730 on the front panel, attention light is on, machine logs
shows an error "B1434999" in the log with a problem in the LIC
of  the SP01= service processor. Machine is at V4R4 / C0172440.
So far, so good, I searched the IBM websites for a PTF or an
APAR about these codes, found something for V3R7, V4R1 and
V4R5 or V5R1, but nothing at V4R4 level.
Looked up the src in "Repair and parts" handbook, procedure for
SRC A6001730 says, "system needs an IPL to recover ...", did
an IPL, same thing again, att. light on and the SRC.
There seems to be no hw-problem.

Any help is appreciated, thank you !

Regards from Cuba, Lybia and Germany, Philipp Rusch