SERVICE MANUAL

8. Electronic function

8.1 Abbreviation

T1: Indoor ambient temperature

T2: Pipe temperature of indoor heat exchanger

Ts: Set temperature

8.2 Display function

8.2.1 Icon explanation on indoor display board:

OPERATION indication lamp:

This lamp illuminates when the air conditioner is in operation. 

AUTO indication lamp:

Lights up during the Auto operation.

Timer indicator

Lights up during Timer operation

Ion indication lamp(optional function):

Lights up when Clean Air feature is activated and Ionizer can generate abundant anions to fill the room with refreshing and natural air.

DEFROST indication lamp (For cooling & heating models only):

Lights up when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation.

TURBO indication lamp:

Lights up only when select TURBO function on cooling operation or on Auto cooling operation.

8.2.2 LED display control function.

Pressing “LED display” button on remote controller will turn off all displays on indoor unit, while pressing once again, all displays will resume.

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8.3 Main Protection

8.3.1 Time Delay at restart for compressor.

8.3.2 Current protection

The following chart shows the protection if the current was too high.

While

I

Restore

=4.5A,

I

Fan

= 5.5A

,

I

5Min

= 6.5A

,

I

5Sec

=7.5A for 7K model;

8.3.3 Fan Speed is out of control.

When indoor fan speed is too low (lower than 300RPM for 50 seconds), the unit stops and LED displays failure

8.4 Operation Modes and Functions

8.4.1 Fan only mode.

(1) Outdoor fan and compressor stop.

(2) Temperature setting function is disabled, and no setting temperature is display.

(3) Indoor fan can be set to high/med/low/auto.

(4) The louver operates the same as in cooling mode.

(5) Auto fan:

8.4.2 Cooling Mode

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8.4.2.1 Compressor and outdoor fan control

The action of the compressor and the outdoor fan are submitted to the following rule:

8.4.2.2 Indoor fan running rules

In cooling mode, indoor fan runs all the time and the speed can be selected in high, medium, low and auto speed.

Auto fan in cooling mode acts as follow:

8.4.2.3 Evaporator low temperature T2 protection.

When T2<TE5 continuous for 5 min, the compressor and outdoor fan will stop and restart until

T2>TE6.

While TE5 = 4℃ ，TE6 = 10℃ for 7K model

8.4.3 Heating Mode

8.4.3.1 Compressor running rules:

For 7K model, the compressor will follow the below rules once the compressor starts up:

When indoor room temp.T1 is higher than Tj, the compressor and outdoor fan will shut off. When T1 is

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lower than Tk, the compressor and outdoor fan will start up.

Tj=Ts+Tc

Tk=Ts+Tc-1. Tc=1 for 7k model .

8.4.3.2 Outdoor fan running rules:

The outdoor units have single fan speed. The outdoor fan will run following the compressor except when AC is in evaporator high temp.protection in heating mode , condenser high temp.protection in cooling mode ,defrosting mode and the current protection.

8.4.3.3 Indoor fan running rules:

For 7K model, when the compressor is on, the indoor fan can be set to high/med/low/auto. And the anti-cold wind function has the priority.

Anti-cold wind function:

When evaporator coil temp.T2 is getting higher,

T2>TE2, the indoor fan will run at setting speed.

TE1<T2<TE2, the indoor fan will run at low speed.

When T2 is getting lower,

TE4<T2<TE3,the indoor fan will run at low speed.

T2<TE4, the indoor fan will shut off.

While TE1=28 ,TE2=32 ,TE3=30 ,TE4=26 for 7k model.

Auto fan action:

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When T1-Ts>2 ,the indoor fan will run at low speed.

When T1-Ts≤0 , the indoor fan will run at medium speed.

8.4.3.4 Defrosting mode：



Condition of defrosting:

AC will enter defrosting mode if any of the following items is satisfied.

(1) Both A and B are satisfied

A: The compressor keeps running for 40 minutes.

B: The evaporator coil temp.T2-Indoor room temp.T1 meets the below table.

T2－T1

High speed

Medium speed

Low speed

Breeze/off

＜TH

DEFROST

＜TM

DEFROST

＜TL

DEFROST

No need to compare the T2 and T1

TH

DEFROST

=14℃, TM

DEFROST

=15℃, TL

DEFROST

=16℃ for 7k model.

(2) After the last defrosting, the time that the outdoor fan is off but the compressor is on in high T2 protection cumulates up to 90 minutes.



Condition of ending defrosting:

If any one of the following items is satisfied, the defrosting will terminate and the machine will turn to normal heating mode.

(1) The defrosting time is reached to the setting value.

(2) The compressor current reaches or overs I

DEFROST for 7 seconds.

I

DEFROST

=3.0A for 7k model.

 Defrosting action：

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About the setting defrosting time:

(1) Condition 1 of defrosting;

If case B happens before case A and lasts till case A happens, the setting defrosting time is 10 minutes.Otherwise the defrosting time is 7.5 minutes.

(2) Condition 2 of defrosting.

The defrosting time is 10 minutes.

(3) No matter what condition of defrosting is, if the defrosting time keeps 7.5 minutes for 3 times, it will be 10 minutes in the 4 th

defrosting.

8.4.3.5 High evaporator coil temp.T2 protection:

While TE7=60℃,TE8=53℃,TE9=50℃ for 7k model,

8.4.4 Auto-mode

This mode can be chosen by remote controller and the setting temperature can be changed between

17~30 .

In auto mode, the machine will choose cooling or fan-only mode according to the difference between

T1 and Ts.

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T1-Ts＞2℃ Cooling

T1-Ts<-1℃ Fan-only

AC will run in auto mode in the below cases:

（

1） Press the forced auto button.

（

2） If AC is off. It will run in auto mode when timer on function is active.

（

3） After setting the mode, AC will run in auto mode if the compressor keeps not running for 15 minutes.

8.4.5 Dehumidify mode

8.4.5.1 Indoor fan speed is depended on compressor, compressor starts, indoor fan in low speed, compressor stops, indoor fan in breeze speed.

8.4.5.2 The action of outdoor fan and compressor are the same is according to the room temperature and set temperature.

NO Temperature

2 TS ≤T1＜TS+2

Compressor and outdoor fan actions

ON 6min

Alternated action

OFF 4min

ON 5min

OFF 5min

Alternated action

Indoor fan actions

Low speed

Breeze speed

Low speed

Breeze speed

3 T1＜TS

ON 4min

OFF 6min

Alternated action

Low speed

Breeze speed

8.4.5.3 If the room temperature decreased to lower than 10℃, the compressor and outdoor fan will stop, indoor fan in breeze speed. If the room temperature raised to higher than 13℃, recover the dehumidify mode.

8.4.6 Forced operation function

8.4.6.1 Enter forced operation function:

Pressing the touch button once, the machine will transfer into forced auto mode, if pressing the button once again, the machine will turn into forced cooling mode, the third pressing will stop the unit, and the forth pressing is the start of the cycle of forced auto mode, forced cooling mode and stop. Refer the following chart:

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8.4.6.2 In forced operation mode, all general protections and remote control are valid.

8.4.6.3 Operation rules:

Forced cooling mode:

The indoor fan will work in low speed, compressor and outdoor fan open unconditionally, after 30min, the unit will transfer into dehumidify mode. All the protections are valid during forced cooling mode.

Forced auto mode:

The action of forced auto mode is the same as normal auto mode with 24 setting temperature.

8.4.7 Timer function

8.4.7.1 Timing range is 24 hours, and the minimum resolution is 15 minutes.

8.4.7.2 Timer on. After turning off, the machine will turn on automatically when reaching the setting time.

8.4.7.3 Timer off. After turning on, the machine will turn off automatically when reaching the setting time.

8.4.7.4 Timer on/off. After turning off, the machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time.

8.4.7.5 Timer off/on. After turning on, the machine will turn off automatically when reaching the setting “off” time, and then turn on automatically when reaching the setting “on” time.

8.4.7.6 The setting time is relative time.

8.4.7.7 The tolerance of timer is 1 minute per hour.

8.4.8 Sleep function mode

8.4.8.1 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode and turns off.

8.4.8.2. Operation process in sleep mode is as follow:

After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode.

When cooling, the setting temperature rises 1 (be lower than 30 ) every one hour, 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed.

8.4.8.3 Timer setting is available

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8.4.8.4 When user uses timer off function in sleep mode (or sleep function in timer off mode), if the timing is less than 7 hours, sleep function will be cancelled when reaching the setting time. If the timing is more than 7 hours, the machine will not stop until reaches the setting time in sleep mode.

8.4.9 Auto-Restart function

The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure. The unit will resume the previous operation setting (not including Swing function) automatically after 3 minutes when power returns.

If the memorization condition is forced cooling mode, the unit will run in cooling mode for 30 minutes and turn to auto mode as 24 setting temp.

If A/C is off before power off and A/C is required to start up now, the compressor will have 1 minutes delay when power on. Other conditions, the compressor will have 3 minutes delay when restarts.

8.4.10 Vertical louver control function (optional)

Total four type operations for vertical louver control function: original orientation, orientation, vane adjustment and horizontal swing.

8.4.9.1 Original orientation means when power on, the louver will turn to the datum mark. This action has the highest priority. The other action of vertical louver can’t act until the original orientation action stopped.

8.4.9.2 Orientation means after the original orientation action, the louver turn the middle position of upper limit position and lower limit position.

8.4.9.3 Vane adjustment, pressing the control button on the remote controller to make the vertical louver turn left and right. Each pressing, the louver will turn 6℃. If pressing the button during the original orientation, the louver will only turn 6℃ after the original orientation action stopped regardless the pressing time. No action when the unit is stopped.

8.4.9.4 Horizontal swing means the louver can auto swing horizontally in the allowable range if pressing the button on the remote controller. Pressing once, the louver starts movement, the second pressing is to stop the moving.

If indoor fan stopped, the horizontal swing is invalid.

8.4.11 Ionizer/Plasma dust collector function (optional)

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The indoor unit is equipped with Ionizer, which is controlled by the CLEAN AIR button on the remote controller. When the unit is turned on, press the CLEAN AIR button to activate the function. Press it again to stop the function. During the time when Ionizer being controlled by remote controller, Ionizer will be turned off automatically, if indoor fan stops running due to malfunctions or anti-cold-wind. When indoor fan restarts after malfunctions being eliminated and anti-cold-wind being released, Ionizer will be available again.

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