Capacitor Testing - AMETEK/PRESTOLITE POWER AC1000 Control Owner's Manual

193111-055
MAINTENANCE
6. Consider diode good if one resistance reading is
infinitely (or very) high and the other is extremely
low.
NOTE: An acceptable low resistance value
or range of values can't be given because of
different readings from different ohmmeters,
and differences in diodes of the same rating.

Capacitor Testing

1. Heed WARNING in Silicon Diode Testing section.
2. Disconnect capacitor and connect leads of
ohmmeter (set to highest scale) to capacitor
terminals.
6-3
3. If capacitor is good, pointer will deflect, indicating
capacitor is being charged, followed by a deflection
in the opposite direction indicating partial discharge.
If there is no deflection, capacitor is "open" and must be
replaced. Also, if meter needle moves and stops at one
value, replace capacitor.
Replacement capacitors must be ordered from factory.
When ordering, supply serial number of charger and
microfarad (MFD) or (µF) value printed on capacitor.
November 17, 2020