d)
External speed potentiometer not properly
connected (open chassis controls).
Speed potentiometer resistorance should measure 1K.
With potentiometer wired voltage between terminal 6(+)
and 5 should vary zero to 6 VDC.
e)
Problems in the control board circuitry.
Return to the factory for repair.
c)
Repeated control fuse blowing
a)
Incorrect AC input voltage.
Check that voltage supplied agrees with the voltage
warning label.
b)
Incorrect connections between motor and
control.
Recheck all motor connections as given on:
A1501-100-ES (open chassis)
A1436-000-WD (enclosed)
c)
Shorts between internal control wiring and
mounting base.
Visual inspection and routine checks.
d)
Shorts in external wiring.
Refer to section on testing in case of fuse blowing.
e)
Faulty SCR power diodes and/or field diodes
Refer to section on testing in case of fuse blowing.
