English (GB)
11
6.
The pump runs, but gives
no water.
a)
The pump inlet pressure is too
low.
See 5 a).
b)
The inlet pipe is partly clogged
by impurities.
See 5 b).
c)
The foot or non-return valve is
stuck in its closed position.
Remove and clean, repair or replace
the valve.
d)
Leakage in the inlet pipe.
See 5 c).
e)
Air in the inlet pipe or pump.
See 5 d).
7.
The pump runs backwards
when switched off.
a)
Leakage in the inlet pipe.
See 5 c).
b)
Foot or non-return valve is
defective.
See 7 c).
c)
The foot valve is stuck in
completely or partly open
position.
See 7 c).
8.
The pump runs with
reduced performance.
a)
Wrong direction of rotation.
Three-phase pumps only:
Switch off the power supply with the
external circuit breaker, and
interchange two phases in the pump
terminal box. Also, see section
4.2 Checking the direction of
rotation
.
b)
See 5 a), b), c), d).
Fault
Cause
Remedy
Summary of Contents for CMV 3
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