18
Technical Information
Service Manual
mode switchover. Protection function is the same as that in other modes.
The selection method for auto operation mode in details is as below:
a. When Tamb. ≥79°F, the unit operates in cooling mode. The defaulted set temperature is 77°F;
b. When Tamb. ≤72°F, the unit operates in heating mode. The defaulted set temperature is 68°F (if it’s the cooling only unit that operates in
fan mode, the defaulted set temperature is 77°F);
c. When 73°F≤Tamb. ≤77°F,if the unit is turned on for the first time,it will operate in auto fan mode;if the unit switched to auto mode from
other mode, it will keep previous operation mode; if the unit is switched to auto mode from dry mode, it will operates in fan mode.
d. When the unit operates in auto mode, frequency of compressor during cooling and heating is same as that in cooling mode and heating
mode respectively.
Protection function:
a. It’s the same as that in cooling mode when it operates in cooling;
b.It’s the same as that in heating ode when it operates in heating;
3.Other Control
(1) Timer Function
General timer and clock timer functions are compatible by equipping remote controller with different functions.
①
General Timer
Timer ON can be set at unit OFF. If selected ON time is reached, the unit will start to operate according to previous setting status.
Time setting range is 0.5-24hr in 30-minute increments.
Timer OFF can be set at unit ON. If selected OFF time is reached, the unit will stop operation. Time setting range is 0.5-24hr in 30-minute
increments.
②
Clock Timer (it’s optional for the remote controller with clock timer)
Timer ON
If timer ON is set during operation of the unit, the unit will continue to operate. If timer ON is set at unit OFF, upon ON time reaches the unit
will start to operate according to previous setting status.
Timer OFF
If timer OFF is set at unit OFF, the system will keep standby status. If timer OFF is set at unit ON, upon OFF time reaches the unit will stop
operation.
Timer Change
Although timer has been set, the unit still can be turned on/off by pressing ON/OFF button of the remote controller. You can also set the
timer once again, and then the unit will operate according to the last setting.
If timer ON and timer OFF are set at the same time during operation of the unit, the unit will keep operating at current status till OFF time
reaches.
If timer ON and timer OFF are set at the same time at unit OFF, the unit will keep off status till ON time reaches.
Each day in future, the system will operate according to preset mode till OFF time reaches and stop operation till ON time reaches. If ON
time and OFF time are the same, OFF command takes the priority.
(2) Auto Button
If this button is pressed, the unit will operate in AUTO mode and indoor fan will operate at auto speed; meanwhile, the swing motor oper-
ates. Press this button again to turn off the unit.
(3) Buzzer
Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep.
(4)Sleep Function
1. Cooling mode:
1.1 When initial ial set temperature range is 61~73°F, if turning on sleep function, temperature will increase 1.8°F for every hour. After 5.4°F
has been increased, the temperature will not change. 7 hours later, temperature will decrease 1.8°F. After that, the unit will keep operating
at that temperature.
1.2 When initial set temperature range is 75~81°F, if turning on sleep function, temperature will increase 1.8°F for every hour. After 3.6°F
has been increased, the temperature will not change. 7 hours later, temperature will decrease 1.8°F. After that, the unit will keep operating
at that temperature.
1.3 When initial set temperature range is 82~84°F, if turning on sleep function, temperature will increase 1.8°F for every hour. After 1.8°F
has been increased, the temperature will not change. 7 hours later, temperature will decrease 1.8°F. After that, the unit will keep operating
at that temperature.
1.4 When initial set temperature is 86°F, the unit will operate at that temperature. 7 hours later, temperature will decrease 1.8°F. After that,
In heating mode, Tpreset=68°F.
(it’s fan mode for cooling only unit,
Tpreset=77°F
Keep current operation mode.
72°F
79°F
.
b
m
a
T
In cooling mode, Tpreset=77°F