Grundfos CMSP-PM1 Installation And Operating Instructions Manual page 5

Fault
17. The pump runs, but
does not deliver
the rated flow.
8. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or privat e waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Cause
a) The internal valve did not close.
Subject to alterations.
Remedy
pressure or flow suddenly increases.
Then open the tap gradually until the
required flow is reached.
5