20
English (US)
If the pump does not start when the fault has been corrected, contact your pump supplier or
Grundfos for further information.
6. The pump
starts when no
water is con-
sumed.
a) Internal non-return valve is
defective, or the existing pipe-
work is leaking or defective.
Clean the valve or fit a new one.
Fault Cause Remedy
Grundfos.book Page 20 Monday, May 23, 2011 10:17 AM
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