Air Conditioner Service Manual
3. Dry mode
While select to this mode, the air conditioner operates for 3 minutes according to cooling mode firstly
(ST set at 7
℃
) , and then takes the detected backflow air temperature minus 2
℃
as a new set
temperature (the minimum value of 5
℃
) and runs according to cooling mode, indoor fan operates at
low-speed, at this moment the setting operation of Fan speed is invalid but Swing is adjustable.
4. Fan mode
1) Indoor fan motor is running at setting speed (the speed is same as that of heating).
2) Vane motor control: running according to the setting condition.
3) The outdoor unit doesn’t work under fan mode.
5. Sleeping mode
1) Under sleep mode, the indoor fan motor is running at a low speed, except that the power light
and sleep light are on, timer light is on/off according to the setting state, running light is off. LED will
be off after displaying 30S.
2) Temperature control:
(1) From Cool mode to Sleep mode, one hour later, the operates Temp.=ST
＋
1°C
，
another one
hour later, the operates Temp.=ST
＋
2°C
，
after then unchanged.
(2) From Heating mode to Sleep mode, one hour later, the operates Temp.= ST-1°C
，
another one
hour later, the operates Temp.=ST-2°C
，
after then unchanged.
3) the machine will automatically shut up after running 10 hours under sleep mode.
Timer on start-up and sleep mode are implemented at the same time, and the sleep mode can not be
functioned.
6. Timing function
The timing scale is between 10min to 24h, when the time fixed is less than “10” hours, the displayed
time is shown by 0.5 hour as the unit, when the time fixed is more than or equal to “10” hours, the
displayed time is shown by 1 hour as the unit.
7. Emergency switch.
（
ON/OFF
）
1) When stand-by, to operate by pressing the emergency switch as follows:
To Press the emergency switch in three seconds, the buzzer rings once, and to release, the machine
runs into cooling mode; if to holding on, the buzzer rings twice, then the machine runs into heating
mode, while when the machine is on, to press the Emergency switch, the buzzer rings once and then
the machine shut down.
2) The machine is running mandatorily as the selected mode within 30min after emergency operation,
indoor fan motor running in high-speed, and stepping vane swinging. The machine runs into
automatic mode 30min later, the selected mode unchanged, the set temperature to be 23° C, the
rotate speed of indoor fan motor is automatic, and stepping vane swinging also.
3) To press the emergency button when the machine operating, then the machine runs into stand-by.
4) Under emergency operation, the function of Compressor’s time-delay protection, anti-frosting
protection in cooling mode, Overheating protection in heating mode, sensor fault protection and
defrost operate are effective.
5) Under emergency operation, once effective signal from remote controller is received, then the
A/C exits form the emergency mode, and operate according to the setting value from remote controller.
8. Auto-restart function
1) The PCB retains the setting parameters in case of power off. When the power supply is resumed,
the machine, which has been started up the power-off memory function, is able to restore into the
6
