N e p t u n e
™
1 . 2 5 H P P o o l P u m p M o t o r
I n s t a l l a t i o n a n d O p e r a t i o n M a n u a l
26
General Troubleshooting
Symptom
Possible Cause
Corrective Action
Motor fails to
start.
Incorrect voltage
to the motor
Verify that the motor voltage to the terminals matches the
nameplate voltage requirements.
Choose the correct voltage position on the Voltage
Selection Switch.
Improper terminal
connections
Turn
OFF
power. Verify that connections are per the
terminal connection section of this manual.
Symptoms
Possible Cause
Corrective Action
Motor does not
come up to full
speed.
Low voltage
Verify that the motor voltage under load to the terminals
matches the nameplate voltage requirements.
Motor stalls
during
operation.
Overloaded motor
With electrical power disconnected, verify that the pump
rotates freely.
Low voltage
Verify that the motor voltage under load to the conduit box
connection terminals matches the nameplate voltage
requirements.
Breaker trip
The interruption of power due to a current breaker trip
indicates a current overload to the circuit beyond the rating
of the breaker(s). Use a qualified electrician to make sure
the breaker(s) rating is properly sized to the motor current
rating based on the National Electrical Code.
Motor vibrates
or is
excessively
noisy.
Pump
Before taking any corrective actions, ensure that the
electrical power is
OFF
. Check the pump to ensure it is
properly connected to the motor shaft. Check the pump
impeller for damage. Make sure there are no foreign
objects inside pump.
Motor base
(if applicable)
Verify that the motor base (if applicable) is not cracked and
that the four mounting bolts are tightened securely.
Motor is not
operating
properly.
Command signal
Check the command signal to ensure that it is above the
Start Threshold. Check line voltage.
