When the short is isolated to a cell tier, remove all
the cells within the tier and visually check the sections
indicated to contain the short.
(a). If the short is in the ionizer section, look for a
broken or defective insulator.
(b). If the short is in the collector section, look for a
large piece of foreign material bridging the
collector plates or a defective insulator.
(c) . If the short is indicated to be in both sections, it
will probably be a foreign object bridging the air gap
between the ionizer and the collector.