Mitsubishi Electric PKFY-P25VBM-E [18/40] Trouble shooting

11. Trouble Shooting

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 intake 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 heating 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 approximate-

ly10 minutes.

Airflow direction changes during operation or airflow direction cannot

be set.

During cooling mode, the vanes automatically move to the horizontal

(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.

During heating mode, the vanes automatically move to the horizontal

airflow direction when the airflow temperature is low or during defrost-

ing mode.

When the airflow direction is changed, the vanes always move up and

down past the set position before finally stopping at the position.

When the airflow direction is changed, the vanes move to the set posi-

tion 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 condi-

tioner 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 expan-

sion 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 cooling mode, water may form and drip from the cool pipes and

joints.

During heating mode, water may form and drip from the heat exchang-

er.

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 dis-

play.

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 disap-

pears.

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

AUTO OFF

appears in the re-

mote 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 ap-

peared 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.

Mitsubishi Electric PKFY-P25VBM-E [18/40] Trouble shooting

Содержание

Похожие устройства