Fault Finding; Disposal - Grundfos LC 115 Serie Manual Del Usaurio

10. Fault finding

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.
Warning
Before making any connections in the controller
or work on pumps, pits, etc., switch off the power
supply. Make sure that it cannot be accidentally
switched on.
Fault
1. The pump does not run
even though the liquid level
is higher than the start level
of the pump.
2. The pump is 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.
Cause
a) No power supply. None of the indicator lights
are on.
b) Control circuit fuses are blown.
c) The motor protection relay has cut out the
pump.
d) The PTC resistance/thermal switch has cut
out the pump.
e) An external alarm device, if any, is activated.
f) The control circuit for the motor protection
relay has been broken or fails.
g) Motor/supply cable is defective.
h) The level sensor is defective.
i) The CU 215 module is defective.
a) The level sensor is defective.
Subject to alterations.
Remedy
Switch on the power supply.
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. The pump will restart
automatically according the signal from the level
sensor.
Check the control circuit.
Check motor and cable.
Check level sensor and cable.
Replace the module.
Check level sensor and cable.
11