Kasco Marine J Series - Manual (Page 25)

“My Aerator hums, but will not start. When I spin the prop
with a stick, it starts up.” (single phase units only)
This indicated a problem with the Starting
Capacitor. Each Kasco single phase aerator is equipped
with a Starting Capacitor to get the unit going when it is
first plugged in. If it is operating, but not spinning and can
be started by spinning the prop with a stick, the Starting
capacitor needs to be replaced by an Authorized Repair
Center.
“My Aerator turns itself off and back on without the timer
and without tripping the GFI breaker.” (single phase units
only)
Each Kasco single phase aerator has a Thermal
Overload built in that will turn the unit off when it
overheats. Once the unit has cooled down, it will start back
up. If you are noticing these symptoms, the unit should be
unplugged immediately because the Thermal Overload will
continue to turn on and off until it burns out and damages
the motor. The unit should be unplugged and taken out of
the water to find the cause of the problem. The problem
could be one of many, such as, low water levels, build-up
on the unit to prevent heat dissipation, something inhibiting
the free rotation of the shaft, etc. If something is caught
in the unit or there is a build-up on the unit, remove the
debris and, if caught early enough, the unit should be fine.
Contact a Kasco representative before restarting the unit.
“My Aerator flow seems to fluctuate and/or be less than
usual.”
This can occur because of a few different reasons.
Most of the time, this symptom is caused from unit being
clogged with debris. A mat of weeds, many leaves, plastic
bags, etc. can clog up the unit and cause it to be starved
of water. If the unit does not have the proper amount of
water, the flow or pattern will fluctuate up and down and
look sporadic. If you are seeing these symptoms, unplug
the unit and clean away the debris that is clogging up
the screen. Another possibility if these symptoms are
noticed, is a chipped or damaged prop that is causing the
unit to wobble and not pump properly. When the unit
is unplugged, check the prop for damages and replace if
damage is found.
“The GFI breaker trips randomly and sporadically.
Sometimes it is a few hours of operation, other times it can
be days or weeks.”
This is referred to as a Nuisance Trip. This usually
occurs where the unit is installed a great distance from the
initial electric service on the property where the ground
stake is placed. It is caused by either induced current in
the ground wire or a base voltage difference due to soil
pH levels. A possible resolution to the problem, contact
an electrician and install a local grounding stake. This
may eliminate the induced current and any base voltage
differences.