Mytee Lite 8070 User Manual page 17

5.2 - Pump Troubleshooting
Pump doesn't turn on.
Possible Causes
Bad switch at control
panel.
Loose or disconnected
wire.
Pump runs but there is no spray.
Possible Causes
Blockage or kink some-
where in the line.
Air is in the pump.
New & Reconditioned Equipment & Parts - www.southeasternequipment.net
Solutions
Unbolt the switch plate.
We recommend taking a
picture of the layout of the
wires or tagging the wires
for future reference. Switch
the wires from the pump
switch with the wires from
either the vacuum or heater
switch. Turn on the vacuum
or heater switch (whichever
one you exchanged wires
with). If the pump turns on,
the pump switch is bad.
Disconnect the power cord
from the electrical outlet.
Open up the machine and
look for any loose or dis-
connected wires. Re-at-
tach or replace wires.
Solutions
See chart on page 4 of the
Diaphragm Pump Trouble-
shooting Guide to diagnose
the location of the block-
age.
Prime the pump.
Remove QD off the ma-
chine and solution hose.
Make sure that the three-
prong clip on the inside of
the threaded end is evenly
aligned below the thread of
the QD.
5 - TROUBLESHOOTING
Pump runs but there is no spray.
Possible Causes
On a new unit, the check
valve between the pump
and heater may hang up,
causing the flow of water to
be impeded or stop entire-
ly.
Pump runs for a second then shuts down.
Possible Causes
QD is pressure locked.
Possible Causes
The jet nozzle could be too
large.
17
Solutions
Remove the check valve
temporarily and check to
see if the pump will flow
water out of the pump out-
let hose when the pump is
turned on for a brief instant
in order to verify cause.
The remedy is to install a
new check valve. Observe
the proper orientation (flow
direction) of the check
valve.
Tip: the check valve may
be able to be temporari-
ly returned to service by
un-sticking the check valve
poppet with manipulation
of the poppet ball with a
thin tool, like a straightened
paperclip. Replace the
check valve in unit assem-
bly.
NEVER OPERATE A UNIT
WITHOUT A CHECK
VALVE IN PLACE.
Solutions
Relieve pressure from be-
hind the QD by pressing in
the button inside the QD.
Low PSI.
Solutions
Replace the jet with one
that has a smaller opening.