Troubleshooting - Mitsubishi Electric CITY MULTI PLFY-P VEM-E Série Manuel D'utilisation

6. Care and Cleaning
If two or more indoor units are connected, filter cleaning timing for
each unit may be different, depending on the filter type.
The icon will appear when the filter on the main unit is due for
cleaning.
When the filter sign is reset, the cumulative operation time of all units
will be reset.
The icon is scheduled to appear after a certain duration of
operation, based on the premise that the indoor units are installed in a
The cumulative time at which filter needs cleaning depends on the
model.
This indication is not available for wireless remote controller.
Caution:
Ask authorized people to clean the filter.
Cleaning the filters
cleaner, tap the filters against a solid object to knock off dirt and dust.
care to rinse off any detergent thoroughly and allow the filters to dry
completely before putting them back into the unit.
Caution:
Do not dry the filters in direct sunlight or by using a heat source,
such as an electric heater: this may warp them.
Do not wash the filters in hot water (above 50 C), as this may
warp them.
Make sure that the air filters are always installed. Operating the
unit without air filters can cause malfunction.
Caution:
Before you start cleaning, stop operation and turn OFF the power
supply.
Indoor units are e uipped with filters to remove the dust of sucked-
in air. Clean the filters using the methods shown in the following
sketches.

7. Troubleshooting

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 heat mode, the air conditioner stops before the set room
temperature is reached.
Airflow up/down direction changes during operation or airflow up/down
direction cannot be set.
When the airflow up/down 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.
Caution:
In removing the filter, precautions must be taken to protect your
eyes from dust. Also, if you have to climb up on a stool to do the
job, be careful not to fall.
When the filter is removed, do not touch the metallic parts inside
the indoor unit, otherwise injury may result.
D
C
PLFY-P . VEM-E Series
1 Pull the knob on the intake grille in the direction indicated by the
arrow and it should open.
2 Open the intake grille.
3 Release the knob on the center edge of the intake grille and pull the
filter forward to remove the filter.
A Knob B Grille C Intake Grille D Filter
Here is the solution. (Unit is operating normally.)
Clean the filter. (Airflow is reduced when the filter is dirty or clogged.)
Check the temperature adjustment and adjust the set temperature.
Make sure that there is plenty of space around the outdoor unit. Is the
indoor unit air inlet or outlet blocked?
Has a door or window been left open?
Warm air does not blow until the indoor unit has sufficiently warmed
up.
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
approximately 10 minutes.
During cool mode, the vanes automatically move to the horizontal
(down) position after 1 hour when the down (horizontal) airflow up/
down direction is selected. This is to prevent water from forming and
dripping from the vanes.
During heat mode, the vanes automatically move to the horizontal
airflow up/down direction when the airflow temperature is low or
during defrosting mode.
When the airflow up/down direction is changed, the vanes move to the
set position after detecting the base position.
These sounds can be heard when refrigerant is flowing in the air
conditioner or when the refrigerant flow is changing.
B
A
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