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Fault
4.
The motor cuts out
during operation.
* Or contact the nearest Grundfos company or
service workshop.

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)
Single-phase motors:
The thermal switch in the
motor has tripped due to
overheating.
b)
Three-phase motors:
Motor-protective circuit
breaker has tripped.
Subject to alterations.
Remedy
The thermal switch will cut in automatically
when the motor has cooled sufficiently.
If the problem still persists, check these two
possible causes:
• Impeller stuck.
Clean the pump according to section 8.1.
• Motor defective.
Repair or replace the motor. *
Cut in the motor-protective circuit breaker.
If the problem still persists, check these two
possible causes:
• Impeller stuck.
Clean the pump according to section 8.1.
• Motor defective.
Repair or replace the motor. *
13

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