Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
327/346
Troubleshooting
Version no. Description
1.0.9.8
It has been reported from the field that a file write access could fail which would initiate
a repair routine in UniSAB III and as part of this procedure UniSAB III could reset. This
has now been corrected.
1.0.9.9 It has been observed from sites with iRIS installation that UniSAB III would sometimes
restart when sending an e-mail to the mail server if the communication was bad due to
e.g. low signal strength or unstable connection. This has now been corrected.
It has been observed from some sites that UniSAB III would sometimes restart and fi-
nally end up being “locked”, i.e. not being able to restart. The cause is found to be a
very large Error.log file which would occupy the flash memory thus preventing UniSAB
III from operating correctly. This problem has been corrected.
As an extra security, version 1.0.9.9 is designed to erase the Error log file after the soft-
ware installation or prior to an Error log write operation if it is detected to be larger than
10 Kbyte.
For screw compressors the timer for Fan after run can now be adjusted between 0 and
1200 seconds. The default setting is 60 seconds.
After 5,000 hours for screw and 7,500 hours for reciprocating compressors a Service
alarm A will occur. With the present Service Notice maintenance program this Service
alarm A cannot be acknowledged with normal Superuser password but must be ac-
knowledged with Supervisor password. Both the Service alarm A and the Service
alarm B functionalities have been completely disabled.
1.1.0.1
The Unload Assist function for SAB 193-355 is now implemented for SAB 120-151 too.
This function helps separating capacity and Vi slide when reducing capacity from
100%.
For SAB 120, 151, 193, 233, 283 and 355 the oil logic has been extended with a new
shutdown "Critical low oil circuit". This function was already implemented for SAB 157
HR.
For SAB 120, 151, 157 HR, 193, 233, 283, and 355 with VSD, the minimum capacity
slide position Manual zero is now automatically configured to the correct value, de-
pending on minimum motor speed.
For SAB 120, 151, 157 HR, 193, 233, 283, and 355 the oil pump logic is extended with
an "oil pump safety" alarm and shutdown. It is supervised that the oil pump, when run-
ning, gives an excess oil pressure.
For reciprocating compressors types SMC/HPC/TSMC 100, an extra Oil pressure mon-
itoring is introduced. This oil pressure monitoring checks that there is a minimum oil
pressure a short time after compressor start, i.e. it monitors that the oil pump is
working.
For HPO and HPC heat pumps (R717) the default oil temperature set points are raised.
The values are now, Set point 1: (oil cooling/normal) 65°C and Set point 2: (oil heating)
55°C.
To Next Page
Loading...
Need help?
General
