Larson Electronics, LLC
Phone: 877-348-9680
Fax: (903) 498-3364
8
of
10
b. Light does not come
on.
1. You may have a bad connection or
an open fuse. Check all fuses and
connections.
2. You may have the wrong converter.
Check to see that the motor you are
attempting to start is within the
horsepower range of your converter,
i.e., a converter that is too large for
your motor will not work.
2. Motor starts but will not
come up to full RPM
A. Motor slows down. Red light
turns on. Motor RPM increases
Red light turns off. Unit cycles
as above.
1. You may have the wrong size
converter. Check to see that the motor
you are attempting to start is within the
horsepower range of the converter you
are using.
2. Starting load is too severe for this
type of converter.
Solutions Are:
a. Upgrade your installation to a
Rotary Phase Converter.
b. Use a larger (approximately 1 /3)
three phase motor on your machine.
3. Motor starts and comes
up to full RPM but…
A. Converter pulsates on/off at
regular intervals.
B. Motor suffers an RPM loss
under load.
1. The running load may be too severe
for this type of converter. Disconnect
motor drives and if problem is
eliminated:
a. Upgrade your installation to a
Rotary Phase Converter.
b. Use a larger (approximately 1/3)
three phase motor on your machine.
1. Your load requires a higher running
efficiency than your converter is
allowing.
Solutions Are:
a. Upgrade your installation to a
Rotary Phase Converter.
b. Install an idler motor into the circuit.
4. Motor is running
A. Improper rotation.
1. Line leads are hooked up wrong for
proper rotation. Reverse any two lines
