Clarke 7120305 Operation & Maintenance Instructions Manual - Page 11
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TROUBLESHOOTING
Problem
Pump does not run.
Pump fails to prime
Pump runs but gives poor
output
Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
Cause
Thermal protection has
been activated.
Faulty power connection Check and repair con-
No mains supply
Impeller seized/blocked
Air leaks through suction
hose joints (damaged
hose, broken clamp,
damaged.
Blocked inlet hose
Congested material
inside pump
Suction or delivery line
obstructed.
Inlet pipe leakage.
Air leaks through
damaged seal.
Impeller damaged and
making poor seal.
Impeller / mechanical
seal is badly worn.
11
Solution
If the motor has over-
heated, wait for it to cool
down before trying
again.
nection as necessary.
Check fused power
supply and replace fuse
if necessary (check fuse
rating). Check circuit
breaker
Disconnect pump from
power supply.
Investigate cause and
clear blockage
Repair connections/
replace hose as
necessary.
Check pipeline for
blockage. Check any
inlet valve fitted is fully
open.
Clean out & backflush
pump.
Remove obstruction and
ensure there are no kinks
in delivery line.
Check inlet pipe and
connector for leaks.
Tighten as required.
Renew seal.
Return to your Clarke
dealer for repair
Return to your Clarke
dealer for repair.