FCI Watermakers MAX-Q+, User Manual & Installation Manual

Page: 106 / 170

FCI WATERMAKERS, INC. 106 Maintenance & Repair
pull starting current (locked rotor) amperage, not rotate, and trip the
supply power circuit breaker when attempting to operate the system.
Low voltage will also cause the same symptom. Low voltage is caused by an
undersized power supply or generator, undersized power lead wires to the
system or motor, loose power wire, or connection at the motor or within the
power supply line, and “burnt” contacts on the motor starter relay (contactor).
SOLUTIONS: Check wiring size and connections to, from, and in between the
Power Supply and the electric motor. Correct wire size or any loose wires. Check
the capacitor on the motor, and replace it if it has shorted out. Measure voltage at
the motor during attempt to start it. If voltage drops more than 10% locate and
correct the reason. Check the motor starter relay, contactor, for “burnt” contacts.
2 The three phase (230, 380, or 460 VAC) electric motor “hums,” pulls
starting current (locked rotor) amperage, does not rotate, and trips the
supply power circuit breaker when attempting to operate the system.
The three phase electric motor requires all three power lines (all
three phases) to be operative else it will “single phase” causing
extensive damage to the motor’s internal windings.
Low voltage will also cause the same symptom. Low voltage is caused by an
undersized power supply or generator, undersized power lead wires to the
system or motor, loose power wire, or connection at the motor or within the
power supply line, and “burnt” contacts on the motor starter relay (contactor).
SOLUTIONS: Check wiring size and connections to, from, and in between
the Power Supply and the electric motor. Correct wire size or any loose wires.
Measure voltage at the motor during attempt to start it. If voltage drops
more than 10% locate and correct the reason. Cross check voltage across all 3
power leads. Check the motor starter relay (contactor) for “burnt” contacts.
3 The Electric Motor makes an unusual “grinding” sound when operated.
SOLUTIONS: Check and replace as necessary the front and rear
bearings. Check to see if the fan is rubbing against the fan guard.
LUBRICATING BEARINGS: Some Electric Motors supplied by FCI
Watermakers have permanently sealed and lubricated bearings. Others
require lubrication from time to time. If your Electric Motor has grease
jerks at each end of the motor, over the front and rear bearings, the bearings
require lubrication every 6 months. Give three pumps of high temperature
motor bearing lubricant into each grease jerk. Use a Polyurea Base
Grease such as Chevron SRI (Polyurea Base) or Shell Dolium R (Polyurea
Base). DO NOT USE LITHIUM OR SILICONE BASE GREASE.
LOW PRESSURE PUMP / MAINTENANCE & REPAIR
(continued)