TCL TAC-07CS/K Service Manual page 10

The indoor fan motor always turns on at the set speed and the vane motor turns on at the set fattle.
7. 4-way Valve contro
HEATING
COOLING/DRY
The 4-way valve reverses for 5 seconds right before start-up of the compressor as following chart:
Compressor
4-way Valve
Outdoor Fan
8. "SLEEP" mode
When the SLEEP button is pressed, the SLEEP mode is selected as following:
The indoor fan speed is set at the super low speed.
When selecting COOLING/DRY operation with SLEEP mode, the set temperature will be raised by 1 ℃ 1
hour later and by 2℃ 2 hour later.
When selecting HEATING operation with SLEEP mode, the set temperature will be dropped by 1℃ 1
hour later and 2℃ 2hour later.
After the System operates in SLEEP mode for 8 hours, it will stop automatically.
9. Fan motor control
(1) Rotational frequency feedback control
The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the
microprocessor to feedback the rotational frequency. Comparing the current rotational frequency with the
target rotational frequency, the microprocessor adjusts fan motor electric to make the current rotational
frequency close to the target rotational frequency. With this control, when the fan speed is switched, the
rotational frequency changes smoothly.
(2) When the rotational frequency feedback signal has not output for 5 seconds (or when the microprocessor
can't detect the signal for 5 seconds), the fan motor is regarded locked-up. Then the electric current to the
fan motor is shut off. 10 seconds later, the electric current is applied to the fan motor again. During the fan
motor lock-up, the POWER indicator lamp flashes on and off to show the fan motor abnormality.
10. Auto Fan Speed Control
(1) When the auto fan speed is selected, the indoor fan motor speed is automatically controlled by the room
temperature and the set temperature.
(2) In COOLING mode, the indoor fan motor operates as following:
Fan Speed
Room temperature minus set temperature:
(3) In HEATING mode, the indoor fan motor operates as following;
Fan Speed
Room temperature minus set temperature
TCL Air Conditioner Service Manual
ON
OFF
COOLING/DRY
5s
Hi
Me
Lo
Hi
Mi
Lo
10
HEATING
5s
1℃ 2℃
1 ℃ 2℃
4℃
4℃