MYERS 10MD05221 Manuel Du Propriétaire page 4

Troubleshooting
SYMPTOM
Pump will not start but fuses do not blow
No voltage.
Fuses blow or overload protector trips when motor starts
Wrong size fuse
or wrong size time
delay fuse.
Low or high
voltage.
Power supply
wire leads not
correctly
connected to
control panel.
Broken wire in
control panel.
Pump stuck or
binding.
Power supply
wires or pump
leads grounded,
shorted, or open.
Fuses blow or overload protector trips when motor is running
Low or high
voltage.
High ambient
(atmospheric)
temperature.
Pump starts too frequently
Leaks in system.
Level switch.
Check valves
leaking.
Little or no water delivered
Check valves stuck
or installed
backwards.
Low voltage.
Plugged intake
screen.
Check valve at
pump discharge
stuck.
Pump doesn't
develop enough
pressure ("head").
POSSIBLE CAUSE(S)
No voltage at control panel.
Electrical cable bad.
Control panel incorrectly wired.
Check fuse size against chart,
Page 2.
Check that line voltage is within
±10% of nameplate rated voltage
while motor is running.
Check control panel wiring diagram
against incoming power hookup.
Check power supply wire color
coding.
Examine all connections and wiring
in control panel.
Check for locked shaft in pump.
Consult licensed electrician or
qualified serviceman.
Check that line voltage is within
±10% of rated nameplate voltage
while motor is running.
Check temperature of tank.
Check for defective switch or switch
out of adjustment.
Make sure check valves are not
leaking back.
Examine valves.
Check voltage at control panel with
pump running.
Pull pump and check condition
of screen.
Pull pump and examine check valve.
Check pump curve against
operating conditions.
CORRECTIVE ACTION
Replace blown fuses or bad cable.
Consult licensed electrician or serviceman.
Reconnect control panel correctly.
Install correct fuse or time delay fuse.
If voltage variation is greater than ±10%,
call power company or local hydro
authority to adjust voltage.
Reconnect leads to match wiring diagram in
control panel cover. Reconnect power supply
wires so wire color code matches motor lead
color code.
Disconnect power and repair or replace faulty
wire.
If necessary, pull pump (make all possible above
ground checks first). If pump is locked, replace it.
Clean tank of all sand, lime, or solids before
reinstalling pump.
Have a qualified serviceman or electrician make
necessary cable repairs.
If voltage variation is more than ±10%, call power
company to adjust voltage.
Protect tank from direct sunlight.
Check plumbing for leaks.
Re-adjust or replace level switch.
Replace check valves if necessary.
If stuck, free valve; if installed backwards,
reverse it.
Install larger wire from meter to control panel.
If necessary, have power company raise supply
voltage.
Clean or replace as necessary.
Free check valve.
Replace pump with "higher head" pump.
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