Following Symptoms; Troubleshooting - Carrier 40MB*F Owner's Manual

11. FOLLOWING SYMPTOMS ARE NOT AIR
CONDITIONER TROUBLES
Symptom 1" The system does not operate
The air conditioner does not start immediately after the ON/OFF
button on the romote controller is pressed.
If the operation lamp illuminates, the system operation is
normal.To prevent compressor motor overload, the air
conditioner starts 3 minutes after it is turned ON.
[] If the operation lamp and the "PRE-DEF indicator(cooling and
heating type) or fan only indicator(cooling only type)" illuminate,
it means you choose the heating model, When starting, if the
compressor has not started, the indoor unit displays an" anti
cold wind" protection message because of the overlow outlet
temperature.
Symptom 2" Change into the fan mode during
cooling mode
[] In order to prevent the indoor evaporator from freezing, the
system will change into fan mode automatically, and then
restore to the cooling mode after soon.
When the room temperature drops to the set temperature, the
compressor turns off and the indoor unit switches to fan mode;
when the temperature increases, the compressor starts again.
The same event occurs when the unit is in the heat mode.
Symptom 3: White mist comes out of a unit
Symptom 3.1: Indoor unit
When the humidity is high during the cooling operation and the
interior of an indoor unit is extremely contaminated, the
temperature distribution inside a room becomes uneven. It is
then necessary to clean the interior of the indoor unit. Ask your
dealer for details on cleaning the unit. This operation requires a
qualified service technician.
Symptom 3.2: Indoor unit, outdoor unit
[] When the system changes over to the heating operation after a
defrost operation, moisture generated by the defrost process
becomes steam and is exhausted.
Sptom 4: Noise of air conditioners cooling
Symptom 4.1: Indoor unit
A continuous low "shah" sound is heard when the system is in
the cooling operation or at a stop.
When the drain pump (optional accessories) is in operation,this
noise is heard.
A "pishi-pishi" squeaking sound is heard when the system stops
after a heating operation.
Expansion and contraction of plastic parts caused by a
temperature change produce this noise.
Symptom 4.2: Indoor unit, outdoor unit
[]
A continuous low hissing sound is heard when the system is in
operation.
This is the sound of refrigerant gas flowing through both the
indoor and the outdoor units.
[]
A hissing sound which is heard at the start or immediately after
a stopping operation or defrost operation.
This is the noise of the refrigerant caused by flow stop or flow
change.
Symptom 4.3: Outdoor unit
[] When the tone of operating noise changes.
This noise is caused by the change of frequency.
Symptom 5: Dust comes out of the unit
[] When the unit is used for the first time in a long time.
This is because dust has accumulated within the unit.
Symptom 6: The unit emits odors.
[] The unit can absorb the smell of rooms, furniture, cigarettes,
etc., and then emit them.
Symptom 7: The outdoor unit fan does not
spin.
[] During operation. The speed of the fan is controlled in order to
optimize product operation.
12. TROUBLESHOOTING
12.1. Troubles and causes of air conditioner
malfunctions
If one of the following malfunctions occur, stop the operation,
shut off the power, and contact with your dealer.
[] The operation lamp is flashing rapidly (5Hz). The lamp is still
flashing rapidly after you turn off the power and then turn it on
again.(Refer to Table 9-1 )
[] The remote controller malfunctions or the button does not does
not work.
[] A safety device such as a fuse, a breaker frequently actuates.
[] Obstacles or water enter the unit.
[] Water leaks from an indoor unit.
[] Another malfunction occurs.
If the system does not properly operate the above mentioned
cases or one of the above mentioned malfunctions is evident,
investigate the system according to the following procedures.
(Refer to Table 9-2)
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