Fault Finding Chart; Disposal - Grundfos LC 110 Montage- Und Betriebsanleitung

10. Fault finding chart

Warning
Before starting any work on pumps used to pump
liquids which could be constituted as being
hazardous to health, thorough cleaning/venting of
pumps, pits, etc. must be carried out according to
local regulations.
Before making any connections in the LC 110 or work
on pumps, pits, etc., it must be ensured that the
electricity supply has been switched off and that it
cannot be accidentally switched on.
Fault Cause
1. The pump does not a) No electricity supply.
run.
b) The ON-OFF-AUTO selector switch is in
c) Control circuit fuses are blown.
d) The motor protection relay has cut out the
e) The motor thermal switch has cut out the pump
f)
g) Motor/supply cable is defective.
h) The electrodes are dirty or defective.
i)
j)
2. The pump is a) The electrodes are dirty or defective.
starting/stopping too
frequently.
See also installation and operating instructions for the pump in question.

11. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
18
Without battery back-up:
None of the indicator lights are on.
With battery back-up
(accessory for certain variants):
See section 4.4, 5.4 or 6.4.
position OFF ( ), see section 4.5,
pump (the red indicator light for pump fault is
permanently on).
(the red indicator light for pump fault is
flashing).
The control circuit for the motor protection relay
has been broken or fails (the green indicator
light indicating pump operation is permanently
on, see section 4.3, 5.3 or 6.3).
The CU 213 module is defective.
The new DIP switch setting does not work
correctly.
Remedy
Switch on the electricity supply.
Push the ON-OFF-AUTO selector switch into position
5.5 or 6.5. ON ( ) or AUTO ( ).
Check and eliminate the cause. Replace the control
circuit fuses (see pos. 6 in fig. 1).
Check the pump/pit.
Allow the pump to cool. After cooling, the pump will
restart automatically unless the LC 110 has been set to
manual restarting, see section 4.2,
ON-OFF-AUTO selector switch must be pushed into
position OFF ( ) for a short period.
If the pump cutout was caused by choked-up
electrodes, these must be cleaned or replaced.
Check the control circuit.
Check motor and cable.
Check cables and electrodes.
Replace the CU 213 module.
Switch off the electricity supply to the controller for
1 minute and switch it on again (normal procedure).
See section 4.2,
Check cables and electrodes.
5.2 or 6.2. If so, the
5.2 or 6.2.