English (GB)
11
10. Fault finding
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.
Subject to alterations.
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 Cause
Remedy
1. The pump does not run
even though the liquid level
is higher than the start level
of the pump.
a) No power supply. None of the indicator lights
are on.
Switch on the power supply.
b) Control circuit fuses are blown.
Check and eliminate the cause. Replace the
control circuit fuses. See pos. 6 in fig.
.
c) The motor protection relay has cut out the
pump.
Check the pump/pit.
d) The PTC resistance/thermal switch has cut
out the pump.
Allow the pump to cool. The pump will restart
automatically according the signal from the level
sensor.
e) An external alarm device, if any, is activated.
f)
The control circuit for the motor protection
relay has been broken or fails.
Check the control circuit.
g) Motor/supply cable is defective.
Check motor and cable.
h) The level sensor is defective.
Check level sensor and cable.
i)
The CU 215 module is defective.
Replace the module.
2. The pump is starting/
stopping too frequently.
a) The level sensor is defective.
Check level sensor and cable.
Содержание LC 115 Series
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