23
10
Troubleshooting
10.1
Plant Operation
Symptom
Possible causes
Solution
Pump won’t start or
run
Fuse blown (if applicable).
Replace with fuse of suitable size.
Tripped breaker.
Reset breaker.
Low line voltage and wet
electrics.
An electrician should check the power
supply to the plant.
Defective pump.
Pump must be checked by a qualified
person.
Pump operates but
delivers no water
Low line voltage or wired
incorrectly.
An electrician should check the power
supply to the plant.
Something caught in
impellers.
Clean out impellers or replace pump.
WARNING: Ensure pump is disconnected
from the mains before you attempt to
unclog it.
Delivery hose blocked.
Find blockage and remove or replace
damaged hose.
Other pump malfunction.
Pump must be checked by a qualified
person.
Plant fills above
working water level
Pump not working.
Check pump is functioning properly as
above.
Float from the pump stuck.
Ensure the float on the pump is set correct
and can move freely.
Storm water flooding.
Redirect storm water drains. Storm water
must never enter the plant.
Discharge hose/pipe
blocked.
Find blockage and remove or replace
damaged hose/pipe.
Pump runs
intermittently
Thermal overload tripped.
Check for clogged impeller.
WARNING: Ensure pump is disconnected
from the mains before you attempt to
unclog it.
The pump has run dry so add water.
Damaged float.
Pump must be checked by a qualified
person.
Alarm is lighting but
the pump and is
working
High level float is snagged
or caught on the side of the
tank.
Free the high-level alarm float; unsnag it
from the side of the tank.
Electrical fault.
Get a qualified person to check that the
alarm is installed correctly.
The electrical panel is wet.
Get a qualified person to check that the
alarm is installed correctly.
Build-up of grease
and fat particularly on
the float switches and
pumps.
Build-up of grease and fat
may happen over a long or
short period of time
depending on type of
material entering the tank.
The float and pump may need to be
withdrawn for hosing down. Once the
pump and float has been cleaned, they
will operate in a more efficient manner.
