Toshiba MMC-AP0151H Owner'S Manual Download

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Silent

It’s strange.

WHEN THE FOLLOWING SYMPTOMS ARE FOUND

Check the points described below before contacting your local service repair center.

Check again.

It is not a failure.

Cause

• Fan of the outdoor unit stops automatically and performs defrost

operation.

• Solenoid valve works when defrost operation starts or finishes.

• When the unit is in operation,a sound such as the movement of

water from one area to another may be heard. This sound may
become larger after a period of 2 to 3 minutes once the unit has
begun operation. This is not a cause for concern, but is the move-
ment of the refrigerant or the draining sound of the dehumidifier.

• When the air conditioner system is operating, the stopping indoor

unit in the same system needs temporary flow of refrigerant to
prevent the stay of oil or refrigerant.
Therefore, refrigerant flow sound “shaa/cyu” may be heard, or white
vapor may come out when other indoor unit heating, or cool air
may come out when other indoor unit cooling.

• This sound is generated when the heat exchanger, etc. expands

and contracts slightly due to the change of temperature.

• Various odurs such as those from a carpet, clothes, cigarette, or

cosmetics will adhere to the air conditioner.

• When cooling operation cannot be performed because another

indoor unit performs heating operation.

• When the manager of the air conditioner has fixed the operation to

either COOL or HEAT, but a request or demand contrary to the
setup operation is requested.

• When the fan operation is stopped to prevent the discharge of hot

air.

• Sound is generated when the expansion valve operates when the

power supply has been turned on.

• Is the timer “ON” or “OFF”?

• Is there a power failure to the unit?
• Has the power supply been turned off?
• Has the power fuse or breaker blown?
• Has the protective device operated? (The operation lamp goes on.)
• Is the timer “ON”? (The operation lamp goes on.)
• Are COOL and HEAT selected simultaneously?

(“

” indication is lit on the display column of the remote controller.)

• Is the suction port or discharge port of the outdoor unit obstructed?
• Are there any doors or windows open?
• Is the air filter clogged with dust?
• Is the discharge louver of the indoor unit set at appropriate position?
• Is the air selection set to “LOW” or “MED” and is the operation

mode set to “FAN”?

• Is the setup temp. the appropriate temperature?
• Are COOL and HEAT selected simultaneously?

(“

” indication is lit on the display column of the remote controller.)

Symptom

Outdoor unit

• White misty cold air or

water is blown out.

• Sometimes, the noise

“Pushu !” is heard.

Indoor unit

• “Swish” sound is

sometimes heard.

• A stopping indoor unit

in the same operating
air conditioner system
emitted sound, white
vapor or cool air.

• Slight “Pishi!” sound is

heard.

• Discharge air smells.

• “

” indication is lit.

• When power of the air

conditioner is turned
on, “Ticktock” sound is
heard.

Operates or stops automatically.

Does not operate.

Air is not cooled or warmed sufficiently.

When the following symptoms are found, stop the operation immediately, turn off the power supply, and con-
tact the dealer from where you have purchased the air conditioner.
• Activation of the power supply causing the unit to operate in an unstable fashion

(power on, power off , power on, power off etc).

• The main power fuse often blows out, or circuit breaker is often activated.
• Foreign matters or water have entered the unit by mistake.
• When the unit fails to operate after the protective device (circuit breaker) has been removed.

Not recommended.

• Other unexplained symptoms or unit abnormalities, that cannot be explained.