Subject
to
modifications
Page Number 11 of 28
2.1B-38008-A01
QLS 311
Form 403074
Installation and Operation Instructions
When the reservoir is nearly empty the pump display
shows
LL (low level)
.
In this case, the pump is not switched off immediately.
The current lube cycle is completed. Upon expiration of
the pause time, the pump cannot be started again
automatically. The flashing display
LL
is indicated.
Before filling the reservoir, press the button (Fig. 24) to
acknowledge the low level indication.
As soon as the lubricant reservoir is filled up, the
LL
display is cancelled. The lube cycle resumes.
Acknowledging the low level indication
* By pressing the button (Fig.24), the flashing display
LL
is changed into a continuous light.
Malfunction/low level indication
If both indications occur at the same time, then both
displays
Er
and
LL
will flash.
Fig. 23 - Keypad showing a malfunction
Fig. 24 - Acknowledging the malfunction
Fig. 25 - Display of a low-level control
Fig. 26 - Display for an acknowledged low level control
In this case, switch on the pump by pressing the button
for additional lube cycle, see Fig. 21.
Acknowledge the
malfunction before doing so.
When a malfunction is present, it can only be cancelled
by initiating an additional lube cycle and after a proper
lube cycle has been executed afterward.
If the fault is still present after an additional lube cycle
has been initiated, the fault indication
Er
is displayed
again.
The monitoring time starts at the same time as the
operating time. It is a fixed time of 15 minutes.
If the voltage supply is interrupted during the monitoring
phase (operating time), the monitoring time starts from
the beginning after the pump is switched on again.
Acknowledging the malfunction
On pressing the button (Fig.24 ), the flashing display
Er
changes into a continuous light.
Monitoring relay
The monitoring relay signals a low level condition or a
malfunction. In both cases, the monitoring relay will pick
up. The signal is available via a potential free contact. The
monitoring relay is released upon acknowledgement of
the fault. The flashing indication switches to continuous
indication.
Models with Low-level control
4228a99
4214a99
4211a99
4213a99