8. Fault finding the product
DANGER
Electric shock
Death or serious personal injury
‐
Before starting any work on the prod-
uct, make sure that the power supply
has been switched off and that it can-
not be accidentally switched on.
WARNING
Corrosive liquids
Death or serious personal injury
‐
Wear personal protective equipment.
WARNING
Toxic liquids
Death or serious personal injury
‐
Wear personal protective equipment.
WARNING
Falling objects
Death or serious personal injury
‐
Keep the product in a stable and fixed
position when working on it.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
‐
Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
‐
Make sure that no one can accidentally
come into contact with hot or cold sur-
faces.
8.1 The motor does not run when started.
Cause
Remedy
Supply failure.
Connect the power supply.
The fuses are blown.
Replace the fuses.
The motor-protective
circuit breaker has
tripped.
Reactivate the motor-
protective circuit breaker.
The thermal protection
has tripped.
Reactivate the thermal
protection.
Cause
Remedy
The main contacts in
the motor-protective
circuit breaker are not
making contact or the
coil is faulty.
Replace the contacts or
the magnetic coil.
The control circuit is
defective.
Repair the control circuit.
The motor is defective.
Replace the motor.
8.2 The motor-protective circuit breaker
trips immediately when the power
supply is switched on.
Cause
Remedy
One fuse is blown or the
automatic circuit
breaker has tripped.
Replace the fuse or cut in
the circuit breaker.
The contacts in the
motor-protective circuit
breaker are faulty.
Replace the motor-
protective circuit breaker
contacts.
The cable connection is
loose or faulty.
Fasten or replace the
cable connection.
The motor winding is
defective.
Replace the motor.
The pump is
mechanically blocked.
Remove the mechanical
blocking of the pump.
The motor-protective
circuit breaker setting is
too low.
Set the motor-protective
circuit breaker correctly.
8.3 The motor-protective circuit breaker
trips occasionally.
Cause
Remedy
The motor-protective
circuit breaker setting is
too low.
Set the motor-protective
circuit breaker correctly.
Low voltage at peak
times.
Ensure a stable power
supply.
8.4 The motor-protective circuit breaker has
not tripped, but the pump does not run.
Cause
Remedy
Supply failure.
Connect the power supply.
The fuses are blown.
Replace fuses.
The thermal protection
has tripped.
Reactivate the thermal
protection.
28
English (GB)
Summary of Contents for CRN 125-11
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