Low Temperature Monitoring; Indicator Elements And Signal Outputs; Led Indicators And Display; Signal Outputs - Bosch Rexroth LU 2 Montageanleitung

If the counter pressure is not reduced during these three deliveries (48 h), an error
message appears. The LED indicators fl ash red and

6.7 Low temperature monitoring

The lubrication unit LU 2 monitors any low temperature of the lubrication point.
If a temperature < -20 °C is detected and error message appears. The LED indicators
ut
fl ash red and appears on the display.
If the drive returns to a permissible temperature range, the display
the drive is put back into operation by pressing and holding the SET button for > 1 s.

6.8 Indicator elements and signal outputs

6.8.1

LED indicators and display

The lubrication unit LU 2 has three LED indicators. The indicators are placed around
the drive and visible from all sides. System status and errors are displayed via these
LED indicators. All three LED indicators have an identical function.
The system states and errors are also shown in the display.
Table 7: System states and indicators
System state
System in operation
Delivery process
Error/fault drive
Oil container LC L250 empty
Special delivery (PURGE)
Counter pressure too high
(p > 6 bar)
Low temperature (t < -20 °C)
Backup battery drive empty
6.8.2

Signal outputs

In addition, the lubrication unit LU 2 has signal outputs OK and Err. These outputs
can be evaluated by a connected controller to monitor the lubrication unit. System
state conditions and faults can be detected.
0L
appears on the display.
LED indicator
Flashing green in 5s intervals
Flashing green in 1s intervals
Flashing red
Flashing red
Flashing green in 1s intervals
Flashing red
Flashing red
-
3 842 358 814/2018-12, MIT: LU 2, Bosch Rexroth AG
Function 25/54
ut disappears and
Indicator in display
- Operating mode TIME or
IMPULSE with appropriate
parameters

- Flashing arrow
ru
Er
LC
PU
0L
ut
Lo