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6.
MAINTENANCE AND INSPECTION
This chapter summarizes the method of maintenance and inspection for assuring
normal operation of the  SZE21  for a long period of service. Consult this chapter
when you make periodic inspection and troubleshooting.
6.1 Periodic Inspection
Inspection of the  SZE21 should be done according to the following criteria.
6.1.1 Inspection Interval
(a)
 About 1 year when the environments is relatively good (in normal electric
rooms).
(b)
 About 6 months when the environment is very bad.
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