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

Page: 111 / 170

FCI WATERMAKERS, INC. 111 Maintenance & Repair
HIGH PRESSURE PUMP MAINTENANCE & REPAIR
HIGH PRESSURE PUMP - ELECTRIC MOTOR
Troubleshoot electric motor failure to ensure that any abnormality from
the power, wiring, connections, contactor or control circuit are not at fault
or at cause. If the electric motor has failed, it will require repair. However,
depending upon failure, replacement may be more cost effective than repair.
If failure of the motor is due to external source, not the motor itself, then
correct the cause or else the replaced or repaired motor will fail again.
FAILURES OF THE ELECTRIC MOTOR MAY BE:
A Bearing failure: Bearings are field replaceable.
B Winding failure: Generally caused by low or high power,
below or above the specified voltage requirements of the
system. This is NOT economically repairable.
C Internal centrifugal switch: Generally caused by mechanical
failure of the switch. Field replaceable.
D Capacitor failure: Generally caused by low power feeding the
motor or low cycles from the power source. Also caused by rapidly
repeating starting and stopping of the motor. Field replaceable.
THE ELECTRIC MOTOR IS:
• 2.5 horse power
• Totally enclosed fan cooled
• 2 pole
• Dual cycle
• Dual voltage.
WARNING
: The high pressure pump MUST rotate in the
COUNTER CLOCKWISE DIRECTION ONLY. Never operate
the high pressure pump in the clockwise direction.
WARNING
: When switching from three phase generator power to three
phase shore power ALWAYS check phases prior to operating the watermaker.
Reverse Rotation will occur should the power be out of phase.
PROBLEMS & SYMPTOMS APPEARING AND CAUSED BY THE
HIGH PRESSURE PUMP OR ITS ELECTRIC MOTOR
The single phase (115 or 230 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 single phase electric motor is a capacitor start motor. If the motor was started with
low voltage, or a drop in voltage occurred during starting, and if this was repeated several
times in rapid concession, the capacitor will short out. Without the aid of a working
capacitor the motor will “hum,” pull starting current (locked rotor) amperage, not rotate,
and trip the supply power circuit breaker when attempting to operate the system.