A.O. Smith Century Pool & Spa Motor - Manual (Page 24)

6 . Check the start switch for broken contact welds or
a broken spring.
7 . Check the capacitor with an ohmmeter. A bulged
capacitor indicates failure on most motors. But
with a Centurion, the only way to verify a failed
capacitor is with the ohmmeter.
I N F O R M ATION NEEDED FOR MOTOR REPLACEMENT
To get the right replacement motor, you’ll need impor-
tant information. Fort u n a t e l y, they all can be found on
the motor nameplate. Here ’s what you’ll need to know:
1 . Mounting configuration - C-Bracket, Square Flange,
or Through-bolt Mount (See page 5-7).
2 . H o r s e p o w e r
3 . S e rvice factor
4 .Vo l t a g e
5 .Pump part number, manufacturer brand name
TROUBLESHOOTING A CAPA C I T O R
To check a capacitor with an ohmmeter,
first TURN OFF THE POWER. If possible,
remove the capacitor from the motor.
Use an insulated screwdriver to discharg e
the capacitor by shorting it across its terminals.
Then set the ohmmeter to its highest setting and attach
the ohmmeter’s clips to the capacitor’s terminals.
Check for the following indications:
1 .Needle drops to zero range and slowly rises —
capacitor is probably OK.
2 .Needle drops to zero and stays there —
capacitor most likely is short e d .
3 . Needle remains at a high value — capacitor may
have an open circ u i t .
2 3
MOTOR TROUBLESHOOTING