Pentair EVO-MULTIMAX 340 KIT Bedienungs- Und Wartungsanleitung Seite 25

THE PUMP STOPS AFTER A SHORT INTERVAL OF OPERATION DUE TO A TRIPPED MOTOR PROTECTION DEVICE
• Excessive current absorption =
check the operating condition of
the pump
• If foreign bodies are present,
blocking hydraulics = clean the
hydraulic components
• Phase missing on power supply
(three phase motor) = check the
electrical power supply
• The single phase motor thermal
THE PUMP STARTS UP BUT DOES NOT DELIVER LIQUID
• Pump is not primed = repeat the
"pump priming" procedure
• The pump takes in air = check the
liquid level, operation of the foot
valve and the suction pipeline
• The foot valve is blocked in the
PUMP PERFORMANCE IS REDUCED
• Pipelines obstructed = check
pipelines
• Pump is not primed correctly
= repeat the "pump priming"
procedure
PUMP PERFORMANCE IS UNSTABLE
• Pump suction pressure too low or
cavitation = check the pump inlet
conditions
• Suction pipe is partially
obstructed with impurities =
clean the suction pipe
• Leak from suction pipe = repair
THE PUMP ROTATES IN THE OPPOSITE DIRECTION WHEN SHUT DOWN
• Foot valve or check valve
defective or blocked in the open
position = remove and clean or
replace the valves
cutout has tripped = this is reset
automatically once the motor
has cooled; check installation
conditions
• Thermal cutout protection
setting or fuses not suitable =
check protection devices with
respect to rated current of pump
• Power cable damaged = replace
component
closed position = replace or clean
the valve
• For self-priming pumps only:
The liquid column above the
check valve on the delivery
pipeline prevents self-priming
• For self-priming pumps only: the
internal valve has not closed =
gradually close a valve until there
is a visible increase in pressure
or replace suction pipe
• air in suction pipe = bleed the
suction pipe, repeat the "pump
priming" instructions
• +For self-priming pumps only:
The differential pressure inside
the pump is too low = gradually
• Leak from suction pipe = remove
and repair suction pipe
USE AND MAINTENANCE MANUAL
• Motor damaged = replace
component
• LOGIC-SAFE enabled
of the pump = drain the delivery
pipeline. Check that check valve
does not retain liquid in the
delivery pipeline. Repeat the
start-up procedure
or flow. Then open the valve
gradually until the required flow
rate is reached
close a valve until delivery
pressure stabilizes and the noise
level is reduced
EN
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