When The Following Symptoms Are Found - Toshiba MMU-AP0091H Owner's Manual Installation And Operation

WHEN THE FOLLOWING SYMPTOMS ARE FOUND

Check the points described below before asking repair servicing.
Symptom
Outdoor unit • White misty cold air or
• Sometimes, noise
Indoor unit • "Swish" sound is
• Slight "Pishi!" sound is
• Discharge air smells.
• "
• Sound or cool air is
• When power of the air
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 switch, and
contact the dealer which you have purchased the air conditioner.
• Activation of switch is unstable.
• The main power fuse often blows out, or circuit breaker is often activated.
• Foreign matters or water entered by mistake.
• When if activation cause of the protective device has been removed, the operation is not performed.
• Other unusual status occurred.
water is out.
"Pushu !" is heard.
heard sometimes.
heard.
" indication is lit.
output from the stand
by indoor unit.
conditioner is turned
on, "Ticktock" sound is
heard.
It's strange.
• Fan of the outdoor unit stops automatically and performs defrost
operation.
• Solenoid valve works when defrost operation starts or finishes.
• When the operation has started, during the operation, or immedi-
ately after the operation has stopped, a sound such as water flows
may be heard, and the operation sound may become larger for 2 or
3 minutes immediately after the operation has started. They are
flowing sound of refrigerant or draining sound of dehumidifier.
• This is sound generated when heat exchanger, etc. expand and
contract slightly due to change of temperature.
• Various smell such as one of wall, carpet, clothes, cigarette, or
cosmetics adhere to the air conditioner.
• Do not the outdoor temperature go out of the specified range?
• When the manager of the air conditioner has fixed the operation to
COOL or HEAT, and an operation contrary to the setup operation is
performed.
• When fan operation stopped to prevent discharge of hot air.
• Since refrigerant is flowed temporarily to prevent stay of oil or
refrigerant in the stand by indoor unit, sound of flowing refrigerant,
"Kyururu" or "Shaa" may be heard or white steam when other indoor
unit operates in HEAT mode, and cold air in COOL mode may be
blow-out.
• Sound is generated when the expansion valve operates when
power has been turned on.
• Is the timer "ON" or "OFF"?
• Is it a power failure?
• Is the power switch turned off?
• Is 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.)
• Do not the outdoor temperature go out of the specified range?
• Is the suction port or discharge port of the outdoor unit obstructed?
• Are any door or window open?
• Is the air filter clogged with dust?
• Is discharge louver of the indoor unit set at appropriate position?
• Is air selection set to "LOW" "MED", and is the operation mode set
to "FAN"?
• Is the setup temp. the appropriate temperature?
• Do not the outdoor temperature go out of the specified range?
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Cause