User Manual

43
/ 78
!
WARNING
To avoid risk of electrical shock that can cause death or severe personal injury,
disconnect unit from power before servicing unless tests require power.
9-10. Fan Noise
9. How to Service
Start
Change the fan.
N
Y
Set it right not to touch.
Y
N
Set it right not to move.
Y
N
Change the motor
assembly.
N
Y
Explain to the customers
how fan is working to
circulate cold air in the
compartments.
Fan is damaged
or transformed ?
Fan is touching
the surround ?
Fan-motor assembly
is moving or shaking ?
Motor has its own noise
or vibration when working ?
Remarks
• The fan is sending out cold air to circulate it through the compartments. When the air is touching the surface of
louver or liner wall, such sound can make.