Carrier 38QH30-C, Руководство по техническому обслуживанию, Страница: 22 / 22

21
TROUBLE CHART (Cont.)
TROUBLE REASON ACTION
Air conditioner is not supplying enough
heating.
Air flow cannot circulate freely Remove obstructions.
Dirty filters reduce air quantity circulating. Clean air filters
Doors and/or windows are open. Close doors and windows
Fan speed has been set to “Low” Set fan speed at high speed.
Air flow direction is not correct Adjust airflow direction as per the mode
chosen.
Selected temperature is Lower than the
room temperature in the heating mode.
Correct selected temperature.
A slight mist is emitted from the indoor
unit during cooling
The cool air from the indoor unit is
coming into contact with the room air.
Normal operation
A slight whistling noise is heard when is
heard when the air conditioner starts or
stops.
This is due to the refrigerant beginning to
circulate or an adjustment of the
refrigerant pressures.
Normal operation
Water vapor (mist) emanating from the
outdoor unit.
It is normal in heat pump operation, when
defrost is automatically activated.
Normal operation
Unpleasant smells coming from the indoor
unit.
Unpleasant smells can be caused by
substances accumulated in the air filters
Switch the system OFF and contact an
authorized service center to have the filters
cleaned.
Restart unit in the ventilation (fan only) mode
and open windows to change room air.
Strange noises coming from the indoor
unit.
Occasionally the indoor unit can emit
some strange short noises during
operation or when it has stopped.
These are generally due to the of
temperature changes on the plastic parts.
Normal operation
Starting in heating mode for heat pump
systems
If the system starts at low ambient
temperatures, it takes a little while to
reach a comfortable room temperature.
When the system is started by the
remote control, it emits a signal beep, but
the louvre does not swing and the fan
does not run until the operating
temperature has been reached. Normal operation
Faulty return air sensor Determine reason and replace
Faulty return indoor coil sensor Determine reason and replace
Timer Led is Blinking
Faulty return outdoor coil sensor Determine reason and replace
Compressor overheat Determine reason and correct
Anti overheat Determine reason and correct
Power led is blinking
Low ambient Determine reason and correct