4
6. TROUBLE SHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
Pump runs
with no flow
Pump suction sieve clogged
Delivery hose obstructed
Clean suction (See Maintenance
section)
Check delivery hose & rectify
Low flow
Pump suction obstructed
Check suction
Delivery head too high
Reduce delivery head
Specify different pump
Pump
does not
run
No mains supply
Level switch not switching on
Check mains supply
Check switch adjustment
Low water level
Thermal cutout tripped due to
overload
Check pump suction
Pump stops
after short
operating
period
Check mains power voltage
Check water temperature is
0
below 35 C
