Troubleshooting - Toshiba MMY-MAP0804FT8-E Owner's Manual

11

Troubleshooting

When the following symptoms are found, check the points described below before asking repair servicing.
Symptom
• 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.
Operates or stops automatically.
Does not operate.
Air is not cooled or warmed sufficiently.
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Cause
• 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 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.
• The outdoor unit is defrosting.
• 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.
• 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.)
• 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?
• Is outdoor temperature out of operation temperature range?
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.
(The operation lamp and on the remote controller are flashing.When
or and a number are displayed on the remote controller, also inform a qualified service person of the display
content.)
• Any other unusual conditions are observed.
Confirmation and check
When an error occurred in the air conditioner, the check code and
the indoor unit No. appear on the display part of the remote
controller.
The check code is only displayed during the operation.
If the display disappears, operate the air conditioner according to the
following "Confirmation of error log" for confirmation.
Confirmation of error log
When an error occurred on the air conditioner, the error
log can be confirmed with the following procedure. (The
error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
Procedure
When pushing and
seconds or more, the following display appears.
If [ Service check] is displayed, the mode enters in the error
1
log mode.
• [01 : Order of error log] is displayed in CODE No. window.
• [Check code] is displayed.
• [Indoor unit address in which an error occurred] is displayed in
UNIT No.
Every pushing of [ /
order.
2
The numbers in CODE No. indicate CODE No. [01] (latest) to [04] (oldest).
CAUTION
Do not push button because all the error log of the indoor unit will be deleted.
3
After confirmation, push
1. Check the errors according to the above procedure.
2. Ask an authorized dealer or qualified service (maintenance) professional to repair or maintain the air conditioner.
3. More details of the check code are explained in Service Manual.
– 20 –
and a combination of
Indoor unit No. in which
Check code
an error occurred
TEMP. ON / OFF
2
TIMER SET FAN
TIME SAVE A A
FILTER L L
RESET TEST SET CL SWING/FIX
3
Description
buttons at the same time for 4
] button used to set temperature, the error log stored in memory is displayed in
button to return to the usual display.
, , , ,
MODE
VENT
UNIT LOUVER
1
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