TCI KMG - Manual (Page 25)

25
Maintenance and Service
MotorGuard Reliability and Service Life
The MotorGuard has been designed to provide a service life that equals or exceeds the life of the
variable frequency drive. It has been thoroughly tested at the factory to ensure that it will perform
reliably from the moment it is put into service. The following periodic maintenance is recommended to
ensure that the MotorGuard will always perform reliably and provide the expected service life.
Periodic Maintenance
Warning Only qualified electricians should carry out all electrical installation and maintenance work on
the MotorGuard.
Disconnect all sources of power to the VFD and MotorGuard before working on the equipment.
Do not attempt any work on a powered MotorGuard.
Check to see that the installation environment remains free from exposure to excessive dirt and
contaminants. Refer to the Pre-installation Planning section of this manual.
Check to make sure that the enclosure ventilation openings are clean and unobstructed.
Clean the air filter in units that have filtered air inlets. Clean as often as necessary to prevent dirt build-
up from impeding air flow.
Inspect the interior of the enclosure for signs of overheated components. Clean the interior of the
enclosure whenever excess dirt has accumulated.
Check the integrity of all power, ground, and control wiring connections.
All electrical connections must be re-torqued annually.
For Units with Boards:
Check the status indicating lights on the monitor board.
Check the operation of the cooling fan.