Trouble Shooting - Mitsubishi Electric CITY MULTI PKFY-P.VAM-E Serie Bedienungshandbuch

9. Care and Cleaning
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10. Trouble Shooting

Having trouble?
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.
The operation indicator does not appear in the remote controller display.
The air conditioner does not operate even though the ON/OFF button is
pressed. The operation mode display on the remote controller disappears.
" " appears in the remote controller display.
16
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I Clean the filter. (Airflow is reduced when the filter is dirty or clogged.)
I Check the temperature adjustment and adjust the set temperature.
I Make sure that there is plenty of space around the outdoor unit. Is the
I Has a door or window been left open?
I Warm air does not blow until the indoor unit has sufficiently warmed up.
I When the outdoor temperature is low and the humidity is high, frost may
I During cooling mode, the vanes automatically move to the horizontal
I During heating mode, the vanes automatically move to the horizontal
I When the airflow direction is changed, the vanes move to the set position
I These sounds can be heard when refrigerant is flowing in the air condi-
I These sounds can be heard when parts rub against each due to expan-
I The indoor unit draws in air that contains gases produced from the walls,
I If the indoor temperature and the humidity are high, this condition may
I During defrosting mode, cool airflow may blow down and appear like a
I During cooling mode, water may form and drip from the cool pipes and
I During heating mode, water may form and drip from the heat exchanger.
I During defrosting mode, water on the heat exchanger evaporates and
I Turn on the power switch. " " will appear in the remote controller display.
I Is the power switch of the indoor unit turned off? Turn on the power switch.
I During central control, "
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1 Remove the catechin air filter.
AOpen the front grille
BCatechin air filter
Caution:
When the catechin air filter is to be removed, do not touch the metal
parts of the indoor unit.
This may cause an injury.
2 Install the catechin air filter.
Be sure to install its both ends into the tabs as shown.
CInstall.
3 Securely close the front grille.
Here is the solution. (Unit is operating normally.)
indoor unit air intake or outlet blocked?
form on the outdoor unit. If this occurs, the outdoor unit performs a de-
frosting operation. Normal operation should begin after approximately 10
minutes.
(down) position after 1 hour when the down (horizontal) airflow direction
is selected. This is to prevent water from forming and dripping from the
vanes.
airflow direction when the airflow temperature is low or during defrosting
mode.
after detecting the base position.
tioner or when the refrigerant flow is changing.
sion and contraction from temperature changes.
carpeting, and furniture as well as odors trapped in clothing, and then
blows this air back into the room.
occur when operation starts.
mist.
joints.
water vapor may be emitted.
" appears in the remote controller display and
air conditioner operation cannot be started or stopped using the remote
controller.