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Page Number 17 of 28
2.1B-38008-A01
QLS 311
Form 403074
Installation and Operation Instructions
Fig. 32 - Example of a QLS 311
4232a99
Troubleshooting, Continuation
Divider Block of the QLS 311
Fault: Blockage in the downstream progressive system, pump doesnt run
Cause:
Bearings, lines or divider block clogged.
Mounting position of divider block : bottom
- On divider block SSV 8,12 and 18 the outlet ports 1 and/
or 2 are closed.
Mounting position of divider block: back-side,
- On divider block SSV 6, 12 and SSV 18 the outlet 1is
closed and out let 2 is connected for bearing lubrication.
The fault can be identified as follows:
a) Fault indication
Er
flashing on the key pad
display.
b) The indicator pin mounted on the divider block
piston does not move.
Remedy:
Determine the cause of the blockage as described in
the following example and eliminate it:
* Let the pump run (refer to Initiating an additional lube
cycle)
* Disconnect all feed lines of the divider block one after
the other. If oil shows under pressure (i. e. at outlet 3,
Fig. 32) the blockage is located in the line of outlet 3 or
in the connected bearing point.
* Pump through the blocked line or bearing point using a
hand pump.
Note: To check the individual outlets, leave all outlet
disconnected for a while, since only one piston stroke is
executed with each motor revolution. Several strokes are
required for a full cycle of all divider blocks.
* Check pressure relief valve (Fig.18). Replace it, if
necessary.
A - pressure relief valve
B - pump
C - SSV 12 divider block
D - feed lines
* Ceck the length of control pin while it moves over the
surface of the proximity switch (forward and backward
movement). During the insert status, the end of the
control pin should be located on the edge of the switch
surface. Otherwise, the pin has to be shortened by
approx. 1 mm (0.03 in).
Fault: Pump either does not switch off at all or only after the monitoring time of 15 min. (Continuation)
Cause:
Remedy:
Control pin is too long.