Toshiba HWS-802XWHM3-E, HWS-802H-E Compressor, Outdoor fan, wayvalve, Outdoor PMV 0pulse, Item

Item	Operation flow and applicable data, etc.
8-4.	6) Defrosting control
Outdoor unit	This control defrosts the outdoor heat exchanger. The temperature sensor (TE sensor) of the outdoor heat exchanger
control	determines frost formation, and then defrosting is performed in the 4-way valve reverse defrosting method.

1)During a heating operation, defrosting is performed when the TE sensor meets any of the conditions in A through D zones.

2)During defrosting, when TE sensor maintains 12°C or higher for 3 seconds or 7°C TE < 12°C for a minute, the defrosting ends. Also, when defrosting continues for 10 minutes even if the TE sensor temperature is below 7°C, the defrosting ends.

3)After the defrosting, stop the compressor for approx. 40 seconds before starting a heating operation.

4)Switching the jumper "J805" and "J806" of the outdoor control board can change the time of d above mentioned. (Factory setting: 150 minutes)

Heating operation starts

TE 0

10

15

39

45

55

d

[min]

[°C]

-2

-5

A zone

-10

D zone

*1 In 10 to 15 minutes after the heating

B

zone

-23

operation starts, the lowest value of

TE is recorded as TEO, and the

(-25)*2

lowest temperature of To as ToO.

*1

C zone

2

* Inside brackets: For 802H-E

To Normal

A Zone

Maintain " (TEO - TE) - (ToO - To)

3°C" for 20 secs

B Zone

Maintain " (TEO - TE) - (ToO - To)

2°C" for 20 secs

C Zone

Maintain " TE

-23°C" for 20 secs (1102, 1402H-E)

Maintain " TE < -25°C" for 20 secs (802H-E)

D Zone

Accumulate compressor operation status of TE < -2°C for 150 mins

To Normal

A Zone

Maintain " TEO - TE

3°C" for 20 secs

B Zone

Maintain " TEO - TE

2°C" for 20 secs

C Zone

Maintain " TE

-23°C" for 20 secs (1102, 1402H-E)

Maintain " TE < -25°C" for 20 secs (802H-E)

D Zone

Accumulate compressor operation status of TE < -2°C for 150 mins

Jumper switching

O: Short circuit ×: Open

J805

J806

d (1102,1402H-E)

d (802H-E)

O

O

150 mins (Factory setting)

150 mins (Factory setting)

O

×

90 mins

90 mins

×

O

60 mins

60 mins

×

×

30 mins

30 mins

Defrosting operation

Compressor	ON
	OFF
Outdoor fan	ON
	OFF
4-way valve	ON
	OFF

500pulse

200pulse

Outdoor PMV 0pulse

0s 30s 40s 0s 10s 30s 40s

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