Symptom
Possible causes
Corrective action
Blower/Pump won’t
start or run
Fuse blown (if applicable)
Tripped breaker
Low line voltage and
wet electrics
Defective blower/pump
Replace with fuse of proper size
Reset breaker
An electrician should check the power supply to
the system
Blower/pump must be checked by a qualified person
Blower operates but
delivers no air
Low line voltage or
wired incorrectly
Filter blocked
Diaphragm broken
Defective blower malfunction
An electrician should check the power supply to
the plant
Replace filter
Replace diaphragm if applicable
Air blower must be checked by a qualified person
Pump operates but
delivers no water
Low line voltage or
wired incorrectly
Something caught in
impellers
Delivery hose blocked
Other pump malfunction
An electrician should check the power supply to
the plant
Clean out impellers or replace pump. Ensure pump
is disconnected from the mains before you attempt
to unclog it.
Find blockage and remove or replace damaged hose
Pump must be checked by a qualified person
Blowers runs
intermittently
Thermal overload tripped
Electrical fault
Protect installation from the sun.
Air supply vent blocked, clean if necessary
Filter blocked, replace if necessary
Discharge hose blocked or kinked, remove obstruction
Get a qualified person to check that the alarm is
installed correctly and the power supply to the plant is
correct
Pump runs
intermittently
Thermal overload tripped
Float from the pump stuck
Damaged float
Check for clogged impeller
The pump has run dry so add water. Ensure the pump is
plugged out before you attempt to unclog it.
Ensure the float on the pump is set correct and
can move freely.
Pump must be checked by a qualified person
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