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Page 35
mrcool.com
Maintenance
Problem Time of Occurrence Cause
Mist comes from
the conditioner.
The air conditioner
generates noise.
The air conditioner
generates smells.
Dust comes from
the air conditioner.
During operation.
The air conditioner is buzzing when
operation begins.
When the unit is turned on, it purrs.
If the unit is running under high
humidity, the wet air in the room will
be quickly cooled down.
Thermostat will be buzzing
when it starts working. The noise will
become weak 1 minute later.
When the system has just started,
the refrigerant is not stable. About 30
seconds later, the purr of the unit
becomes low.
The unit starts operation after being
unused for a long time.
Dust from inside the units is
dispersed with the supply airflow.
During operation.
Smells from the operating
environment may be pulled through
the air handler and dispersed
throughout the rooms.
It is the sound of gaseous refrigerant
that has stopped flowing or changed
direction, and the sound of the
drainage system.
There is a hissing sound when the
unit has been turned on, or stopped
suddenly during operation, or after
defrosting.
Because of temperature change, the
front panel and other components
may swell and cause an abrasive
sound.
There is a crunching sound during
and after operation.
(2) The following situations are not operation failures.
NOTICE
Check the above items and take appropriate corrective measures. If the air conditioner continues to
improperly function, please turn off the air conditioner immediately and contact MRCOOL
®
Tech Support,
at (270) 366-0457, or your installing dealer.
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