Pentair AURORA LAYNE VERTI-LINE Series - Motor Does Not Start; Motor Fails to Come up to Speed; Motor Runs Hot

36 6EM Thru 18GM - 1100 Vertical Turbine Pumps
Layne/Verti-Line 12/99
DANGER
Electrical power must be disconnected
and locked to prevent accidentally
starting during mechanical systems
check.
DANGER
Electrical trouble shooting must be
performed by qualified electricians
skilled in the use of electrical
instruments.
Motor Does Not Start
1. Break in power supply circuit.
a. Blown or defective primary fuses or
open circuit breakers.
(1) Check voltage across all phases
above the disconnect switch.
Replace fuses or reset breakers.
b. Blown or defective secondary fuses
or open circuit breakers.
(1) Check voltage across all phases
below disconnect (with disconnect
closed). Replace fuses or reset
breakers.
2. Open control circuit.
a. Overload trips are open.
(1) Push reset button.
b. Defective holding coil in magnetic
switch.
(1) Push start button and allow
sufficient time for operation of time
delay.
(2) If voltage is measured, coil is
defective.
(3) If no voltage is measured, control
circuit is open
c. Loose or poor connections in control
circuit.
d. Make visual inspection of all
connections.
(1) Tighten as necessary.
3. Magnetic switch closes.
a. Poor switch contact.
(1) Open manual disconnect switch,
close magnetic switch by hand and
examine contactors and springs.
b. Open circuits in control panel.
(1) Open manual disconnect switch,
close magnetic switch by hand and
examine contactors and springs.
c. Open circuits in leads to motor.
(1) Check voltage at T1-T2-T3.
d. Leads improperly connected.
(1) Check lead numbers and
connections.
Motor Fails To Come Up To Speed
1. Low or incorrect voltage.
a. Check voltage at T1-T2-T3 in control
panel.
2. Incorrect connections at motor.
a. Check for proper lead connections at
motor.
(1) Compare with connection diagram
of motor.
3. Mechanical overload.
a. Check for tight or locked shaft.
4. Hydraulic overload.
a. Check pump flow and head against
performance curve.
Motor Runs Hot
1. Inadequate ventilation.
a. Assure adequate supply of fresh air.
1) Check air blast through motor by
feeling air discharge at bottom of
motor.
2. Overload.
a. Check for tight or locked shaft.
b. Check pump flow and head against
performance curve.