20
Maintenance
MOTOr
Please note that IST motors do not require lubrication. Each motor contains
two carbon brushes which will wear normally, and may eventually require
replacement. For warranty purposes, this should be done by an authorized
service center. The brush's life is affected by the number of hours of use,
frequency of start-ups and shut-downs, humidity, altitude, and temperature. In
order to avoid damage to the motor itself, brushes should be replaced before
they are completely worn out. We therefore recommend that you have your unit
and motors inspected by a service center every 5-6 years.