Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
321/346
Troubleshooting
Version no. Description
1.0.7.0
A new Aux output function Running at max cap. has been added. With this function the
Aux. output is set active when UniSAB III is running at maximum possible capacity.
See subsection 3.5.6 Aux. output for description.
The service timer Since Start is now logged in the picture History/Shutdowns/Control
State.
The Heating element DO status is now logged in the picture History/Shutdowns/Output
State.
The Emergency stop DI status is now shown in the picture History/Shutdowns/Input
State.
The Quick set-up configuration menu has been changed so it will not always perform a
factory reset after a parameter change but may now for most parameter changes just
make a software restart. See section 6.4 Configuration for description.
When selecting refrigerant type R000 it was not possible to set the low alarm limit or
the low shutdown limit lower than 0.1°C or higher than 11.6°C. This has now been
corrected.
If Profibus Tiny was selected a false shutdown Low suction pressure was shown in the
Shutdown picture but only if no “real” shutdown was active. This has now been
corrected.
For the limiter function Discharge press overload the shutdown timer would count down
when the pressure was “higher than or equal to” the high alarm limit. This has now
been changed to just “higher than”. It now corresponds to the conditions for the limiter
function itself.
For the limiter functions Motor current overload and Motor power overload the shut-
down timer would count down when the current/power was “higher than or equal to”
the SP1 or SP2 limit. This has now been changed to just “higher than”. It now corre-
sponds to the conditions for the limiter function itself.
In the Setup/Multisab picture the parameter Parallel offset was neither shown nor pos-
sible to change for Rotatune Screw and Rota Recip compressor types. As these types
also operate in parallel operation, this has now been corrected.
For Screw, Screw Rotatune and Recip Rota compressors the P-band factors for the
Start delay and Stop delay timers did not work correctly. This has now been corrected.
In Multisab a Rotatune slave compressor is started, i.e. the Start Delay timer starts
counting when there is need for more capacity and the Master regulator is outside the
neutral zone and the preceding Rotatune compressor is running above 95% capacity.
This capacity limit is now raised from above 95% to above 98%.
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