Precautions; If Noise Is Heard - Electra WNG 7 Service Manual

PRECAUTIONS

Use the proper electrical fuse..
Do not pull out the power cord unless the unit is
turned off.
Do not turn on or off air conditioner by inserting
the power cord.
Do not obstruct or block the air inlet or air outlet
of the air conditioner.
Do not insert any objects in the air outlet of the
indoor or outdoor units.
Do not splash water on air conditioner.
16
CONTENT

IF NOISE IS HEARD

There may be hissing
sound during operation
or just aftershut down.
This is caused by the
refrigerant that is
circulating inside the
unit
There may be a cracking
sound at starting and
stopping the unit's
operation. This is caused
by heat expansion or
contraction of plastics.