When The Following Symptoms Are Found - Carrier Toshiba MMY-MUP0721FT6P-UL Owner's Manual

11

When the following symptoms are found

Check the points described below before asking repair servicing.
S y m p o t m
White misty cold air or
water is out.
Outdoor unit
Sometimes, noise of air
leak is heard.
"Swish" sound is heard
sometimes.
Slight clacking sound is
heard.
Discharge air smells.
Indoor unit
" " indication is lit.
" " indication is lit.
" " indication is lit.
Sound or cool air is output
from the stand by indoor unit.
When power of the air conditioner is turned
on, "Ticktock" sound is heard.
LCD blurs when it is touched.
Fan and louvers of the indoor unit moves
when the unit is not operated.
S o t p s a u o t m a c i t l a . y l
Does not operate.
Air is not cooled or warmed sufficiently.
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C a u s e
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 immediately
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.
Is outdoor temperature out of operation temperature range?
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
COOL or HEAT, and an operation contrary to the setup operation is
performed.
When stopping the fan to prevent cool air blow at starting heating.
Since refrigerant is flowed temporarily to prevent stay of oil or
refrigerant in the stand by indoor unit, sound of flowing refrigerant,
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.
LCD may temporarily blur by static electricity.
Intermittent operation of the fan with louvers open is sometimes
carried out for the refrigerant recovery control of unoperated unit.
s I h t e i t m e " r O F F ? "
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.)
Are Cool and Heat selected simultaneously?
(" " indication is lit on the display of the remote control.)
Is outdoor temperature out of operation temperature range?
Is the air intake or air discharge 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?
Are Cool and Heat selected simultaneously?
(" " indication is lit on the display of the remote control.)
Is outdoor temperature out of operation temperature range?
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CAUTION
If any of the following conditions occur, turn off the main power supply switch and immediately contact the dealer:
Switch operation does not work properly.
The main power fuse often blows out, or the circuit breaker is often activated.
A foreign matter or water fall inside the air conditioner.
When the air conditioner does not operate even after the cause of the protective device activation has been
removed.
Any other unusual conditions are observed.
■
Confirmation and check
Check code
Indoor unit
number
■
Contact information for repairs
You can look for contact information for repairs.
When a trouble occurs in the air conditioner, the check
code and the indoor unit number flash on the display of
the remote controller.
* The check code is only displayed during the
operation.
When the check code and indoor unit number are
displayed, pushing [ Return] opens the "Check"
screen.
In the "Check" screen, push [ Set/Fix] to show the
contacts.
Push [ Menu] to display "Model information".
1
In the "Information" screen, push [ ] and
[ ] to select "Service information", and
then push [ Set/Fix]
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