1900 Series Horizontal Splitcase Pumps
Instruction and Repair Manual
20
11/12/18
TROUBLE
PROBABLE CAUSE
REMEDY
1. Motor does not start.
a. Break in power supply circuit.
a. Close break in circuit.
1. Blown or defective primary fuses
or open circuit breakers.
1. Check voltage across all phases
above the disconnect switch.
Replace fuses or reset circuit
breakers as necessary.
2. Blown or defective secondary
fuses or opened circuit
breakers.
2. Check voltage across all phases
below disconnect switch (with
disconnect switch closed).
Replace fuses or reset circuit
breakers as necessary.
b. Open control circuit.
b. Complete control circuit.
1. Overload trips are open.
1. Push reset button.
2. Defective holding coil in
magnetic switch.
2. Push start button and allow
sufficient time for operation
of time delay, if used, then
check voltage across magnetic
holding coil. If voltage is
measured, coil is defective. If
no voltage is measured, control
circuit is open.
3. Loose or poor connections in
control circuit.
3. Make visual inspection of all
connections and retighten as
necessary.
c. Magnetic switch closes.
c. Check switch operation.
1. Poor switch contact.
1. Open manual disconnect switch,
close magnetic switch by hand
and examine contactors and
springs.
2. Open circuit in control panel.
2. Check voltage at TI-TI-T3.
3. Open circuits in leads to motor.
3. Check voltage at leads to outlet
box.
4. Leads improperly connected.
4. Check lead numbers and
connections.
MOTOR:
The trouble or symptoms, their probable causes and the suggested remedies contained in this troubleshooting guide
will assist you in quickly determining and correcting most problems should they occur. It is not the intention of Fairbanks
Nijhuis™ to replace the recommendations of the motor manufacturer in regard to operation and maintenance. Rather,
this guide is offered as a supplement to such data. Any specific questions or problems should be directed to the
manufacturer of the motor. Be sure to supply the relevant data from the motor nameplate when inquiring about motor
service or maintenance.
DANGER:
Electrical troubleshooting should be performed by qualified electricians skilled in the use of electrical instruments.
Electrical power should be disconnected and locked to prevent the motor from accidentally starting during mechanical
systems check.
