Clarke CWP1000A, Operation & Maintenance Instructions Manual, Page: 8 / 12

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Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
TROUBLESHOOTING
If this does not solve your problem, please contact the Clarke service
department.
PROBLEM SOLUTION
PUMP WILL
NOT START 1. Make sure that the power is switched on.
2. Check fuse (consult an electrician if in doubt).
3. If extension lead is fitted, check connections (consult an
electrician if in doubt).
4. Internal thermal cut-out has not re-set. Leave for 5-10
minutes and try again.
5. The impeller may be jammed. Disconnect from the mains
supply and remove any objects that may be obstructing
the impeller.
6. Float switch may be jammed against side wall, or
prevented from moving.
7. Water level too low - float switch in OFF position - lift float
to check switch.
8. If the pump still fails to start, consult your CLARKE dealer
for advice.
PUMP WILL
START BUT NOT
PUMP 1. Check that the inlet is not blocked.
2. Check that the discharge tube is not clogged or
obstructed.
3. The head may be too great, i.e. you are trying to lift the
water too great a distance for the pump to cope with.
(“Specifications” on page 7).
4. Air bubble in the pump, produced during immersion.
immerse the pump again, at an angle, and shake it whilst
lowering to remove any air trapped in the system.
5. Impeller may be damaged - Consult your CLARKE dealer.
PUMP WILL
NOT STOP 1. Float switch may be prevented from moving to the fully
down position.
2. Float switch may be faulty. Consult your CLARKE dealer
for advice.
PUMP STOPS
RUNNING 1. Thermal overload has operated. Leave for 5-10 minutes
and try again.
2. Pump has run dry, or float switch has cut in.
3. A foreign object has jammed the impeller.