Engineering manual - UniSAB III 1.10.8
156/346
001930 en 2021.06
Compressor control and surveillance
1.
If necessary, move capacity slide (and Vi slide) as close as possible to the limit
Vi mode
to avoid
undesirable capacity jumps. However, stop movement if/when reaching the limit for reasonable
power consumption.
2.
Deactivate solenoid valve of Vi slide to release Vi slide and move it to minimum position.
3.
If still necessary, move capacity slide to the limit
Vi mode
.
4.
Change to normal capacity control.
3.9.6
Position indications
In the picture
Control values/Capacity/Values
, capacity and Vi slide position are indicated. At full load
Capacity
will show 100% while
Vi slide position
is calculated from the actual capacity slide position. At
part load
Capacity
will show the actual capacity slide position while Vi slide position is 0%.
3.9.7
Slide brake control
The slide brake is released for a short time (
Brake delay
) before the slide motor is activated.
The brake is also released for this period of time (
Brake delay
) after deactivating the slide motor.
Brake
delay
can be selected within the range 0 to 0.5 seconds in the picture
Service/Diagnose/Software/Misc
Functions
.
3.9.8
Capacity shutdown
If the slide does not move as expected a capacity shutdown will be issued. This means that every time
the slide moves at least 0.5% in the chosen direction a
Capacity
timer is reset to 100 seconds. If it is ex-
pected to move, the timer will count down. If the timer reaches 0, the alarm will be issued. Inspect the
timer in the picture
Service/Diagnose/Software/Misc Functions
.
Summary of Contents for SABROE Unisab III Control
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