Pentair NOCCHI MULTI EVO Manual De Instrucciones página 22

ENGLISH
QUICk TROUBLE­
SHOOTINg gUIDE
Refer to the "safety instructions".
The pump does not work
• No power supply = turn on the switch
and check that no electrical connec­
tions are loose or defective.
• Check the mains voltage
• Fuse blown = check that the cables
and relative connections are not de­
fective and replace the fuse if neces­
sary
• The single phase motor thermal cu­
tout has tripped = this is reset auto­
matically once the motor has cooled
• Motor overload cutout has tripped
= check that the cables and relative
connections are not defective, check
that the pump is not blocked mecha­
nically, or whether the pump winding
is damaged (replace if necessary)
• Electrical power line damaged =
replace
• Pump blocked mechanically = clean
The pump stops after a short interval of
operation due to a tripped motor pro-
tection device
• Excessive current absorption = check
the operating condition of the pump
• If foreign bodies are present, blocking
hydraulics = clean the hydraulic com­
ponents
• Phase missing on power supply (three
phase motor) = check the electrical
power supply
• The single phase motor thermal cu­
tout has tripped = this is reset auto­
22 22
matically 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
• Motor damaged = replace component
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 closed
position = replace or clean the valve
• For self­priming pumps only: The li­
quid column above the check valve on
the delivery pipeline prevents self­pri­
ming of the pump = drain the delivery
pipeline. Check that check valve does
not retain liquid in the delivery pipe­
line. Repeat the start­up procedure.
Pump performance is reduced
• Pipelines obstructed = check pipelines
• Incorrect impeller rotation (three pha­
se motor) = check direction of rotation
• Pump is not primed correctly = repeat
the "pump priming" procedure
• For self­priming pumps only: the in­
ternal valve has not closed = gradually
close a valve until there is a visible in­
crease in pressure or flow. Then open
the valve gradually until the required
flow rate is reached.