Troubleshooting - Pentair WHISPERFLO VS 1500 Owner's Manual

MAINTENANCE
To avoid dangerous or fatal electrical
shock hazard, turn OFF power to
pump and remove plug from power
outlet before working on pump.
• It is essential for the longevity of the pump that regular service and maintenance be carried out.
The WhisperFlo VS 1500 incorporates high velocity moving parts and is pumping water containing
harsh pool chemicals. Some parts which will wear during the normal operation and expected life of
the pump.
Once per week
Inspect trap basket, and empty
of any leaves and other debris.
Leaves and other debris that
collects in basket will choke
off water flow through the
pump and reduce efficiency
and performance. See below
instructions on cleaning the trap.
Clean area around pump and
ensure there are no leaves or
debris which could become a fire
hazard or choke the motor fan.
Follow instructions below to clean trap:
1. Switch off power to pump, close valves in suction and discharge, and release all pressure from
system before proceeding.
2. Remove trap cover (turn counter clockwise). If necessary, tap handles gently with a rubber mallet.
3. Remove strainer basket and clean. Ensure all holes in basket are clear, flush basket with water
and replace in trap with large opening at pipe connection port (between ribs provided). If basket is
replaced backwards, the cover will not fit on trap body. To clean transparent cover, use water and
neutral soap only. Do not use solvents.
4. Clean and inspect lid o-ring; reinstall on trap. Clean O-ring groove on trap body and replace cover.
To help keep cover from sticking, tighten hand tight only.
5. Prime pump (refer priming instructions).
24 WhisperFlo VS 1500 Owner' s Manual
Do not operate pump with trap
basket missing or damaged.
FREQUENCY
Once per month
CHECK
Check the pump to ensure no
water is leaking from inlet and
outlet joints, whilst pump is
operating. If leaks are noticed,
clean and grease the o-rings or
replace if necessary.
Check that there are no leaks
from under the pump. If there are,
this could be a sign of a leaking
mechanical seal. Call a Pentair
Service Agent immediately, to
prevent damage to the motor.
Check pump and motor for
insects and pest infestations
and ensure that motor fins are
clean of dust and dirt. Clean if
necessary.
To avoid dangerous or fatal electrical shock hazard, turn OFF power to pump and
remove plug from power outlet before working on pump.
Troubleshooting Guide
SYMPTOM CAUSE
Low water Suction leaks / lost
pressure, low flow prime.
from pump.
Low speed setting.
Clogged pipe /
strainer / impeller /
filter system.
No water coming Air ingress to
from pump (pump is system.
working).

TROUBLESHOOTING

REMEDY
• Pump must be primed; make sure that the
pump casing and strainer are full of water.
Refer priming instructions.
• Make sure there are no leaks in suction
piping and ensure all o-rings are present
and clean.
• Make sure suctions pipe inlet is well below
the water level to prevent pump from
sucking air.
• Suction lift of 3 to 6 metres will reduce
performance. Suction lift of more than 6
metres will prevent pumping and cause
pump to lose prime. In either instance,
move the pump closer (vertically) to water
source. Ensure that the suction pipe
diameter is large enough.
• Check speed setting. Refer to speed
selection section of this manual. Reset to
default if necessary.
• Ensure trap is not clogged with debris;
clean basket and/or filter.
• Make sure that the impeller is not
clogged. This should be checked by
qualified personnel only.
• Pump may be trying to push too high a
column of water. If so, a higher pressure
pump is required.
• Prime the pump. Check that there are no
air leaks in the suction piping or fittings.
Ensure the strainer lid is airtight and
fitted securely. Ensure all o-rings are
present.
WhisperFlo VS 1500 Owner' s Manual 25