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• If the temperature of the heat sink TH. reaches over Toff, the Compressor stop instantly.
• It will be limited the compressor operating frequency according to the heat sink TH.(refer to below FIG.)
• It will be blink 4 times, when the thermistor is open or short, also the temperature is over Toff.

• If the temperature of the discharge pipe of compressor reaches over 130°C or below -30°C the compressor

stop instantly.

• It will be limited the compressor operating frequency according to the compressor dome TH.(Refer to below

Fig.)

-25-

Comp. off

Comp. free

Fc-1

Fc-2

Target frequency

Toff (84

°

C)

Ton + 2

°

C (78

°

C)

Ton + 5

°

C (81

°

C)

Ton (76

°

C)

130

°

C

118

°

C

111

°

C

108

°

C

-13

°

C

-30

°

C

101

°

C

93

°

C

Fhmin

OFF

OFF

0Hz

Fc-2

Fc-1

Setting frequency

• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,

reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.

• Defrosting control is available 50 minutes later since heating cycle started and the pipe temperature of out-

door unit reaches below -6°C.

-26-

50 min

Setting frequency

Setting speed

Setting

speed

OFF

OFF

ON

OFF

OFF(Cooling cycle)

Setting

frequency

30 sec

Fc-1 step

Operating
frequency
of compressor

4 Way valve

Outdoor fan

Indoor fan

Defrost LED

Fc-1

Fh+1

OFF

ON

ON(Heating cycle)

ON

ON

Low

(FhMAX-2 or

FhMAX-3)

30 sec

30 sec

8 min or

over 25˚C(120sec)

30 sec

1 min

■

• It must be displayed the power level that will be operating frequency of compressor.
• It indicates power levels that compressor operating frequency is controlled to depend on indoor and outdoor

conditions.

• It is displayed as below.

❐

- Power level 1: below Step 3 of COMP. operating frequency
- Power level 2: below Step 6 of COMP. operating frequency
- Power level 3: below Step 10 of COMP. operating frequency
- Power level 4: below Step 14 of COMP. operating frequency
- Power level 5: over Step 14 of COMP. operating frequency

❐

- Power level 1: below Step 2 of COMP. operating frequency
- Power level 2: below Step 8 of COMP. operating frequency
- Power level 3: below Step 10 of COMP. operating frequency
- Power level 4: below Step 12 of COMP. operating frequency
- Power level 5: over Step 12 of COMP. operating frequency

-13-

-14-

• If the indoor pipe temperaure is below 0°C in 7 min. after the compressor operates without pause while in

cooling cycle operation mode, 

➔ 

compressor, outdoor fan are turned off.

• When indoor pipe temp. is 7°C or higher after 2 min pause of compressor 

➔ 

compressor, outdoor fan is turned on according to the condition of the room temperature.

• Control condition : The system operates standard operation without this condition as follows.

- Setting temperature <25°C
- Indoor fan speed  

≤

low speed

- Outdoor temperature < 31°C

- Operation frequency of compressor must be below 

➃

- The indoor fan operates at medium speed.

Comp. free

Comp. off

0˚C

7˚C

Indoor pipe
temp.

Comp. free

Comp. Step 4

3˚C

3

°

C

Indoor pipe
temp.