Manuals / Sanyo / Household Appliance / Air Conditioner

Sanyo CHDXR09663 Frost detection, Outdoor units where defrost occurs, Reverse Cycle Defrost

Models: CHDXR07263* CHDXR09663 CHDX07263 CHDX09663

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4. Special Controls

W-2WAY ECO-i SYSTEM Control Functions

4-3-3. Frost detection

(A)Frost detection does not occur for 5 minutes after operation starts.

(B)Frost is detected when either condition 1 or 2 below is met.

Condition 1: L2 line or below is detected twice, each time continuously for 4 minutes, when the compressor is operating.

Condition 2: L1 line or below is detected for a total of 60 minutes when the compressor is operating.

 

Heat exchange liquid temperature °F

1

 

 

 

 

 

 

Defrosting operation

 

(The end temperature

 

50

end temperature

 

is different from the

 

 

 

above detection

 

 

 

 

 

 

 

 

 

 

temperature.)

–6.5

 

 

50

External temperature °F

 

 

 

 

 

 

 

30

 

L1

 

26

 

L2

 

17

 

 

 

14

The frost detection area is located under the thick lines

–9

–13

4-3-4. Outdoor units where defrost occurs

Even if the total time has not reached 35 minutes, if there is 1 or more outdoor units that fulfills the defrost detec- tion conditions, all operating outdoor units perform defrost control at the same time.

*Defrost control is also performed at outdoor units where the outdoor unit heat exchanger is not functioning as an evaporator (such as stopped outdoor units).

4-3-5. Reverse Cycle Defrost

If there is 1 outdoor unit and no thermal storage tank in a refrigerant system, a reverse cycle defrost will be carried out.

• Defrost flow

E: Evaporator operation

 

 

 

 

 

 

 

 

 

C: Condenser operation

 

 

 

 

 

 

 

 

 

E C: Switching from evaporator operation to condenser operation

 

 

 

C E: Switching from condenser operation to evaporator operation

 

 

 

 

 

 

 

 

 

 

 

 

Defrost preparation

Defrost in progress

Defrost end

 

Outdoor unit status

E

C

E C

C

 

 

C

E

 

Stopped indoor units

C

E

E

E

 

 

E

C

 

Indoor units where fan is operating

C

E

E

E

Defrost

 

E

C

 

Cooling mode

Thermostat ON

C

E

E

E

end

E

C

 

indoor units

Thermostat OFF

C

E

E

E

judgment

E

C

 

Heating mode

Thermostat ON

C

E

E

E

 

 

E

C

 

indoor units

Thermostat OFF

C

E

E

E

 

 

E

C

 

Compressor

Stopped

Operating

Operating

 

 

Stopped

 

 

 

 

 

 

 

 

 

 

 

Time

1 min

1 min

Max. 10 min

1 min

 

 

 

 

 

 

 

 

 

 

 

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Sanyo CHDXR09663, CHDX09663, CHDX07263 Frost detection, Outdoor units where defrost occurs, Reverse Cycle Defrost
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