Jandy JCP Series Installation And Operation Manual page 19

Jandy JCP Series High Performance Commercial Pumps
®
Symptom
Motor does not turn
Low flow
Motor runs hot
|
Installation & Operation Manual
Possible Cause
No power to motor.
Thermal protector tripped
The motor is improperly connected
Drive shaft seized
Dirty filter.
Dirty skimmer basket.
Suction air leak.
Closed valves or blocked lines.
Pump spinning backwards
Low voltage or incorrect voltage.
Incorrect wiring, phase unbalance
Undersized wire
Installed in direct sun.
Poor ventilation.
ENGLISH
Solution
Verify all breakers are on and not in the overload position.
If the pump is being controlled by a VFD, ensure the
controller is on and giving power to the motor.
Check the temperature of the motor, if the motor is hot the
thermal protector may have turned the motor off.
Check the wiring diagram and verify the configuration
needed for the power source.
With all power off to the motor, turn the motor's drive shaft
manually. The drive shaft should spin freely by hand
without catching or dragging. If the drive shaft does not
spin freely, disassemble the pump and repair.
Clean filters when the back pressure is high.
See problem 1.
Have a certified electrician check the voltage at the motor.
The voltage at the motor must be within 10% of the
nameplate voltage. If the voltage is outside of this range,
contact the local power provider.
Verify the wiring diagram matches the configuration used
for the power supply. Verify current on all phases are
nearly identical. If a phase current is notably higher than
the others, the motor is operating with phase unbalance.
Turn off the motor and check the wiring connections for
frayed, broken, or partial conductor connections. Cut and
restrip leads if necessary. Verify voltage between each
phase. The voltage variation between phases should be
no larger than 5%. If the connections are secure, phase
voltage is similar, and a phase unbalance is still present,
the motor winding insulation may be damaged and the
motor must be repaired or replaced.
Increase the wire gauge for all leads going to the motor.
It is best to keep the pump sheltered from direct sunlight.
Do not enclose the pump in a small location with minimal
free air flow. Make sure that there is adequate room
around the motor to circulate air and keep the motor cool.
Page 19