Scheduled maintenance consists of performing a visual inspection of the VS300 at scheduled
intervals. The recommended minimum time between scheduled maintenance visits is three months.
Local operating and environmental conditions may dictate more frequent visits, while in remote sites,
less frequent visits may be acceptable. Experience and system reliability will determine the most
practical schedule for a specific installation.

Cleaning fan filters

Clean the fan filters, noting there is one on each side of the transmitter. Gently remove the fan filter
cover and guard, rinse the filters with water, then re-install the filters and guards. If a fan filter
becomes damaged, replace it as soon as possible. You can order the filter from Nautel (part #
HAS72) or obtain one from any local supplier of HVAC supplies.

Note:
A site located in a dirty area using open-air cooling requires more extensive cleaning than a site
located in a clean area using closed-air cooling.