User Guide

14
Winding Test Mode (continued)
Now, press and release the WINDING TEST
switch; the display makes a circular pattern to
remind you that the motor shaft needs to be
turned one or two revolutions to test it.
The digital display gives the results of the test:
“00” means connector is not connected.
“02” means motor not spun 1-2 turns in time
“11” means a winding is shorted to the case
“21” means winding phase “A” is open
“22” means winding phase “B” is open
“23” means winding phase “C” is open
“31” means winding phase “A” is shorted
“32” means winding phase “B” is shorted
“33” means winding phase “C” is shorted
“77” means the winding section shows OK.
Display returns to last mode after 10 seconds.
Of course, there could be problems with the
bearings. If motor slows after getting warm, dis-
connect as above to eliminate EMF backfeeding
from electronics pack as a possible symptom
that
acts like bearing seizure, before condemn-
ing bearings themselves.