Troubleshooting; Caution - Mitsubishi Daiya FDTJ28HKXE2 User Manual

1. Clean the air filter by tapping it or with a vacumm cleaner. It is better to clean it
with water.
If the air filter is very dirty, dissolve some neutral detergent in the lukewarm water
(approx. 30°C), rinse the filter, and wash out the detergent thoroughly in clear
water.
2. After drying the air filter, set it up on the air conditioner, and press the FILTER
RESET switch.
G Do not dry the air filter with fire.
G Do not run the air conditioner without the air filter.
Care and Cleaning of the unit
G Clean with soft and dry cloth.
G If it is very dirty, dissolve a neutral detergent in lukewarm water and use this for dampening the cloth.
When you have finished wiping, remove the detergent with clean water.
At the end of the season
G Operate the unit for half a day in FAN mode in fair weather to dry the inside properly.
G Stop the unit and turn off the power switch.Even when the air conditioner has been stopped, it still uses electricity.
G Clean the air filter and re-install it.
At the beginning of the season
G Remove any objects that may obstruct the air inlet and outlet of both the indoor and outdoor units.
G Ensure that the air filter is clean.
G Switch on the power switch 12 hours before you start operating.

TROUBLESHOOTING

Please carry out the following checks before making a service call.
The unit does not work at all
Has the power switch been turned on? Do you have a normal municipal
electricity supply?
The switch
is not ON.
Poor cooling or heating
Have you set the thermostat at a Is the air filter clean?
suitable temperature?
Did you leave any doors or windows Is swing flap in the horizontal posi-
open? tion? (During heating operation)
Air blow will not reach the floor if the swing flap
is set horizontally.
Is there any direct sunlight entering the room? Is there a heat source in the room?
Cooling air is coming out. (on heating operation)
When the air conditioner does not operate properly after you have checked
Isn't the air conditioner under prepara-
the above mentioned items or when the following phenomenon is observed,
tion of heating operation?
stop the operation of the air conditioner and contact your sales dealer.
G The fuse or breaker often shuts down.
Hot keep Page 9
G Water drops off during cooling/dehumidfying operation.
operation
G There is an irregularity in operation or abnormal sound is audible.
G Inspection lamp blinks.
8
Cleaning

CAUTION

Is your earthed plug alright?
Power If not, this may be dangerous. Turn off the
failure?
power supply immediately and contact your
dealer.
Is the operation mode of the unit to be
operated and that of other indoor units
not matched?
When the operation mode is not coordi-nated,
the operation changes to blowing.
Are there any obstacles blocking the
air inlet or outlet?
Poor cooling
Are there too many people in the room?
The following does not mean malfunctions of the unit.
You hear a slight When you start the air conditioner, when the compressor starts or stops
gurgling sound. during operation or when you stop the air conditioner, you may hear gurgling
sound. this means that the refrigerating liquid is circulating, it is quite normal.
You hear a slight cracking sound. This is caused by heat expansion or contraction of plastic.
Hissing or gurgling sound is heard from Those are the sounds of an air conditioner controlling itself automati-
the unit stopped. cally.
You smell something. Air blown out of the indoor unit sometimes smells.
This is caused by tobacco smoke or cosmetics stuck inside the unit.
During the operation, If the air conditioner is used in a restaurant etc with dense oil fumes
some white mist escapes around, some white mist may escape from the air outlet.
from the indoor unit. If so, call the dealer to clean the heat exchanger.
The unit switches to FAN mode during The mist sometimes switches automatically to FAN mode to prevent
cooling. accumulation of frosty film on the indoor unit heat exchanger. It will soon
revert to cooling mode.
Blower of indoor unit does not stop even In order to cool down the remaining heat on the auxiliary heater, the blower
if the operation is stopped during may operate continuously for about 40 seconds after the unit is stopped. Do
heating cycle. not turn off the power supply switch before the blower stops.
You can not restart the air Even if you switch on, you cannot use
conditioner immediately after cooling, dehumidifying or heating for three
you have stopped it. minutes after the air conditioner has
stopped. as a result of the protection timer
Unit does
being activated.
not start.
(During this time the unit operates in FAN mode.)
Air does not blow or the fan speed can During the dehumidifying operation, the blower is operated in the strong
not be changed during dehumidifying. or weak blowing mode or stopped alternately in order to prevent an
excessive cooling or rising of humidity.
The swing flap operates by itself. When the power switch is turned on, the auto swing is repeated twice. It
is not a trouble. Moreover, it is automatically brought into the horizontal
position in the "HOT KEEP".
Operation mode lamp on the remote The lamp flickers when the operation mode is not matched on the indoor
controller is blinking. units, and the unit operation is changed to blowing. Coordinate the
(In case of cooling, dehumidifying or operation mode or stop the other units.
heating) (The cooling/heating free multi-KXR unit can be operated in different
mode in cooling and heating.)
Water or steam generates from the This results when frost accumulated on the outdoor unit is removed
outdoor unit during heating. (During defrosting operation).
The blow rate become weak when the When the operation mode is changed from [cooling] to [heating] or from
operation mode was changed during operation. [heating] to [cooling], the unit is operated in weak blow mode for 3
(For the cooling/heating free multi-KXR unit) minutes.
The blower in the outdoor unit does not In the defrosting operation or the heating operation at high outside
rotate during operation. temperature, the function to stop the blower is activated. On the con-
trary, the function that automatically controls the number of blower
operates at low atmospheric temperature.
There is a danger that the blower suddenly begins to rotate even if it is
stopping now, therefore do not insert your finger or a bar. Neglecting
this will result in injury.
Operation was started just after the When the power failure compensation is set to "valid", after the power
power switch was turned on. recovery the operation starts with the same status as that of before the
power failure or before turning off the power switch. See page 8.
The setting temperature does not When the temperature setting is fixed, the setting temperature does not
change. (The setting temperature change even if the
indication flick-ers.)
Wait for
three
minutes.
WARNING
switch is pressed.