LENS 1259942 - Caterpillar

Operate Transfer Switch
Operate the transfer switch at least once each month. This can be done by performing a normal test. Because the Operating Mode Switch only simulates failure of the normal power source, service will be interrupted only during actual transfer of the load.Clean And Inspect Transfer Switch
Protect the transfer switch components against construction grit and metal chips at all times. Also protect against excessive moisture.Once each year, de-energize all power source supplies to the switch. Then, brush and vacuum away dust and dirt accumulations inside the enclosure.After cleaning, inspect the unit carefully. Look for evidence of arcing, burning, hot spots, charring and other damage. If any of these are found, have the transfer switch checked by an authorized service technician.Transfer Switch Lubrication
Transfer Mechanism operating parts have been properly lubricated at the factory.Under normal operating conditions, the Transfer Mechanism should require no additional lubrication. Lubricate all recommended points whenever major internal components are replaced.Main Current Carrying Contacts
At least once each year, have the main current carrying contacts inspected by an authorized service technician. The technician will replace or repair major assemblies that have become worn or defective.9 Volt Battery
The standard Microprocessor Based Control circuit board utilizes a 9 volt battery to operate its exercise timer during the brief period of time when the load terminals are disconnected from both power sources. It is recommended that the battery be replaced at least once each year. On units with an optional In-Phase Monitor or Programmable Logic circuit board, a separate 7-Day Exerciser circuit board will connect to the 9 volt battery. See "Transfer Switch Options" section of this manual.