Mitsubishi Electric PLFY-P32VCM-E [19/42] Troubleshooting
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Mitsubishi Electric PLFY-P32VCM-E [19/42] Troubleshooting

Mitsubishi Electric PLFY-P15VCM-E [19/42] Troubleshooting
19
GB
11. Troubleshooting
Having trouble? Here is the solution. (Unit is operating normally.)
Air conditioner does not heat or cool well.
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?
When heating operation starts, warm air does not blow from the indoor
unit soon.
Warm air does not blow until the indoor unit has sufficiently warmed
up.
During heat mode, the air conditioner stops before the set room
temperature is reached.
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.
Airflow up/down direction changes during operation or airflow up/down
direction cannot be set.
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 always move
up and down past the set position before finally stopping at the position.
When the airflow up/down direction is changed, the vanes move to the
set position after detecting the base position.
A flowing water sound or occasional hissing sound is heard.
These sounds can be heard when refrigerant is flowing in the air
conditioner or when the refrigerant flow is changing.
A cracking or creaking sound is heard.
These sounds can be heard when parts rub against each due to
expansion and contraction from temperature changes.
The room has an unpleasant odor.
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.
A white mist or vapor is emitted from the indoor unit.
If the indoor temperature and the humidity are high, this condition may
occur when operation starts.
During defrosting mode, cool airflow may blow down and appear like a
mist.
Water or vapor is emitted from the outdoor unit.
During cool mode, water may form and drip from the cool pipes and
joints.
During heat mode, water may form and drip from the heat exchanger.
During defrosting mode, water on the heat exchanger evaporates and
water vapor may be emitted.
The operation indicator does not appear in the remote controller display.
Turn on the power switch. “ ” will 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.
Is the power switch of the indoor unit turned off? Turn on the power
switch.
“ ” appears in the remote controller display. During central control, “ ” appears in the remote controller display
and air conditioner operation cannot be started or stopped using the
remote controller.
When restarting the air conditioner soon after stopping it, it does not
operate even though the ON/OFF button is pressed.
Wait approximately three minutes.
(Operation has stopped to protect the air conditioner.)
Air conditioner operates without the ON/OFF button being pressed.
Is the on timer set?
Press the ON/OFF button to stop operation.
Is the air conditioner connected to a central remote controller?
Consult the concerned people who control the air conditioner.
Does “ ” appear in the remote controller display?
Consult the concerned people who control the air conditioner.
Has the auto recovery feature from power failures been set?
Press the ON/OFF button to stop operation.
Air conditioner stops without the ON/OFF button being pressed.
Is the off timer set?
Press the ON/OFF button to restart operation.
Is the air conditioner connected to a central remote controller?
Consult the concerned people who control the air conditioner.
Does “ ” appear in the remote controller display?
Consult the concerned people who control the air conditioner.
Remote controller timer operation cannot be set.
Are timer settings invalid?
If the timer can be set,
WEEKLY
,
SIMPLE
, or
AUTO OFF
appears in
the remote controller display.
“PLEASE WAIT” appears in the remote controller display.
The initial settings are being performed. Wait approximately 3
minutes.
An error code appears in the remote controller display.
The protection devices have operated to protect the air conditioner.
Do not attempt to repair this equipment by yourself.
Turn off the power switch immediately and consult your dealer. Be
sure to provide the dealer with the model name and information that
appeared in the remote controller display.
Draining water or motor rotation sound is heard.
When cooling operation stops, the drain pump operates and then
stops. Wait approximately 3 minutes.

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