Larson Electronics, LLC
Phone: 877-348-9680
Fax: (903) 498-3364
9
of
10
backwards.
at the motor only.
5. Motor is running hot.
A. Are your thermal overloads
tripping?
a. No.
b. Yes.
1. Your motor is running within
accepted NEMA specifications.
1. Your thermal overloads may be set
too close to nominal. Check trip point
and readjust if necessary.
2. You may have a loose connection.
Check that all connections are tight.
3. You may have used insufficient wire
size for the installation.
4. You may have insufficient motor
ventilation. Check and provide ample
ventilation for the motor.
5. Motor may be dirty. Check & clean
motor.
6. You may have a bad motor. Have
motor checked and repaired as
required.
7. Your motor load may require a
higher motor efficiency than the
converter is allowing.
Solutions Are:
a.
U
pgrade your installation to a
Rotary Phase Converter.
b.
I
nstall an idler motor into the circuit.
c.
U
se a larger (approximately 1/3)
three phase motor on your machine.
6. Multiple speed motor
will not start at all
speeds.
A. Motor starts and runs fine at
one speed but will not start at
other speeds.
1. One or more motor speeds is not
within the horsepower range of the
converter.
Solutions Are:
a. Upgrade your installation to a
Rotary Phase Converter.
b. Install an idler motor into the circuit.
