Trouble Shooting - Mitsubishi Electric Mr. SLIM PKA-M HA Series Operation Manual

6. Care and Cleaning
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PKA-M·HA(L)
1 Pull both the bottom corners of the intake grille to open the grille, then
lift the filter.
EN

7. Trouble Shooting

Air conditioner does not heat or cool well.
When heating operation starts, warm air does not blow from the indoor
unit soon.
During heating mode, the air conditioner stops before the set room tem-
perature is reached.
Airflow direction changes during operation or airflow direction cannot be
set.
When the airflow direction is changed, the vanes always move up and
down past the set position before finally stopping at the position.
A flowing water sound or occasional hissing sound is heard.
A cracking or creaking sound is heard.
The room has an unpleasant odor.
A white mist or vapor is emitted from the indoor unit.
Water or vapor is emitted from the outdoor unit.
" " appears in the remote controller display.
EN-11
Having trouble?
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PCA-M·KA
C
1 Open the intake grille.
2 Hold the knob on the filter then pull the filter up in the direction of an
arrow. To replace the filter after cleaning, be sure to insert the filter far
enough until it fits into the stopper.
A Filter
B Intake Grille
C Knob
D Stopper
Here is the solution. (Unit is operating normally.)
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Clean the filter. (Airflow is reduced when the filter is dirty or clogged.)
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Check the temperature adjustment and adjust the set temperature.
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Make sure that there is plenty of space around the outdoor unit. Is the
indoor unit air intake or outlet blocked?
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Has a door or window been left open?
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Warm air does not blow until the indoor unit has sufficiently warmed
up.
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When the outdoor temperature is low and the humidity is high, frost
may form on the outdoor unit. If this occurs, the outdoor unit performs
a defrosting operation. Normal operation should begin after approxi-
mately 10 minutes.
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During cooling mode, the vanes automatically move to the horizontal
(down) position after 1 hour when the down (horizontal) airflow direc-
tion is selected. This is to prevent water from forming and dripping
from the vanes.
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During heating mode, the vanes automatically move to the horizontal
airflow direction when the airflow temperature is low or during defrost-
ing mode.
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When the airflow direction is changed, the vanes move to the set posi-
tion after detecting the base position.
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These sounds can be heard when refrigerant is flowing in the air condi-
tioner or when the refrigerant flow is changing.
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These sounds can be heard when parts rub against each due to ex-
pansion and contraction from temperature changes.
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The indoor unit draws in air that contains gases produced from the
walls, carpeting, and furniture as well as odors trapped in clothing, and
then blows this air back into the room.
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If the indoor temperature and the humidity are high, this condition may
occur when operation starts.
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During defrosting mode, cool airflow may blow down and appear like a
mist.
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During cooling mode, water may form and drip from the cool pipes and
joints.
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During heating mode, water may form and drip from the heat exchang-
er.
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During defrosting mode, water on the heat exchanger evaporates and
water vapor may be emitted.
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During central control, " " appears in the remote controller display
and air conditioner operation cannot be started or stopped using the
remote controller.
A
B
D