# Maintenance and Testing

Regular testing is the main element of a maintenance program for ongoing Catalyst RTU reliability. These tests should include interrupting primary power to the RTU for at least 4 hours to verify the gel cell battery maintains RTU operation for that time period. You may wish to temporarily disconnect the phone line or temporarily turn off the power failure alarm to avoid nuisance calls during the test period. The LOBAT light on the Catalyst activates whenever the battery voltage falls below a certain level. If the battery is not fully charged (as following installation or following a power failure) the light will be activated. The LOBAT light does not necessarily warn of a battery wearing out. It should be considered a secondary indication of battery and charger activity.

The only periodic replacement item on this product is the Gel Cell Lead Acid battery. The life cycle of this battery is similar to that of an automobile battery, so it should be replaced every three years. See the topic on Battery Replacement. Note that this kind of battery cannot be stored for more than a few months without charging or it will deteriorate.

Replacement batteries can be ordered from RACO or directly from the manufacturer as printed on the battery.

Another replacement item that is not periodic is the fuse. It is suggested that at least two fuses be stored with the Catalyst. Occasionally a fuse will blow in response to a substantial high voltage transient on the power line, resulting in a power failure alarm. This occurs more commonly with 120 VAC input power than with DC power sources. Usually replacing the fuse will restore normal operation with no further need for service.

The type of fuse depends upon the input power configuration.

120 VAC Littelfuse 229.003 | 3 amp
12 VDC Littelfuse 229.001 | 1 amp
24 VDC converter module | Bussman BK/GMC 700 ma
48 VDC converter module | Bussman BK/GMC 315 ma
125 VDC converter module | Bussman BK/GMC 200 ma