8
6 TROUBLE SHOOTING
Please read this section before calling for
help.
If you call for help, please refer to the model
and serial numbers.
6.1 If The Pump Doesn’t Run
Most problems are caused by wrong connec-
tions (in a new installation) or failed connec-
tions, especially where a wire is not secure
and falls out of a terminal. The System ON
light will indicate that system is switched on
and connected to the controller. It indicates
that VOLTAGE is present but (in a solar-direct
system) there may not be sufficient power to
start the pump. It should attempt to start at
intervals of 120 seconds.
Pump attempts to start every 120 seconds
but doesn’t run
The controller makes a slight noise as it tries
to start the pump. The pump will start to turn
or just vibrate a little.
1. There may be insufficient power reaching
the controller. A solar-direct (non-battery)
system should start if there is enough sun
to cast a slight shadow. A battery system
should start if the supply voltage is greater
than 22V (24V system) or 44V (48V
system).
2. If the pump was recently connected (or
reconnected) to the controller, it may be
running in reverse direction due to wiring
error. See Section 3.
3. If the motor shaft only vibrates and will not
turn, it may be getting power on only two
of the three motor wires. This will happen
if there is a broken connection or if you
accidentally exchanged one of the power
wires with the ground wire.
4. The pump or pipe may be packed with
mud, clay, sand or debris.
5. Helical rotor models: The pump may have
run dry. Remove the pump stator (outer
body) from the motor, to reveal the rotor. If
there is some rubber stuck to the rotor,
the pump end must be replaced.
6. Helical rotor models: The check valve on
the pump may be faulty or stuck, allowing
downward leakage when the pump is off.
This can prevent the pump from starting.
PUMP OVERLOAD (PUMP ON light shows
red instead of green) The system has shut
off due to an overload. This can happen if the
motor or pump is blocked or very difficult to
turn and is drawing excessive current (hard
to turn). Overload detection requires at least
250 Watt output of the solar array. This can
be caused by a high concentration of solids
in the pump, high water temperature, exces-
sive pressure due to high lift or a restriction
in the pipe, or a combination of these factors.
The controller will make 3 start attempts
before shutting down the system. The
System ON LED will be OFF and the red
OVERLOAD LED ON. The system will not
reset until the ON / OFF switch is turned OFF
and ON again.
CAUTION DO
NOT REMOVE
THE CHECK
VALVE from the
pump. If you want
to look for dirt
stuck inside the
pump, it is
preferable to
unbolt the pump
body and pull it
from the pump. IF
YOU MUST
REMOVE THE
CHECK VALVE,
use a hardening
adhesive sealant
on the screw
threads when you
replace it. Epoxy
glue is good. The
threads are not
tapered. They will
leak if a harden-
ing sealant is not
used. Teflon tape
will make a good
seal, but it may
not prevent the
joint from un-
screwing.
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