Toshiba HWS-802XWHT6-E, HWS-802H-E, HWS-802XWHM3-E, HWS-1402H-E 1-2High temperature release control

Item	Operation flow and applicable data, etc.
8-3.	1-2) High temperature release control
Hydro Unit	A heat pump operation is performed as shown in the table below according to the TC sensor detecting temperature.
Control	• For the detected temperature, TC (= TWO + 2 degree) of a heat pump operation is used. The values of T7 through
	T10 vary depending on TWI. (See the table below)

•If the compressor frequency instruction from the hydro unit is less then 10 Hz, the compressor stops.

•TC > 62°C causes the compressor to stop abnormally. When the compressor restarts 140 seconds after the stop

and TC > 62°C is not detected for 20 minutes, the abnormal stop counter is cleared. 10 times of compressor abnormal stop stops the operation of heat pump, and confirms the abnormality (Display: A11).

* If the heat pump operation is switched to other operation, the abnormality detection counter is reset to 0.

			TC (TWO+2)					Forcible stop			Zone	Control operation
					T11						R1	Increase compressor frequency by 1.2 Hz every
												60 secs.
		(62.0°C)						O (down)
							R2			Increase compressor frequency by 0.6 Hz every
					T10
								P (slow down)				60 secs.
					T9
								Q (keep)			O	Decrease compressor frequency to 70% every
					T8							10 secs.
						R1		R2 (slow up)			P	Decrease compressor frequency by 3 Hz every
												10 secs.
					T7	(slow up)
				S (normal)				Q	Keep compressor frequency.
TC=TWO+2deg										(°C)
			TWI			T7	T8	T9	T10	T11
	TWI<30					57.0	59.0	60.0	61.0	62.0
	30			TWI<35		57.0	59.0	60.0	61.0	62.0
	35			TWI<40		56.5	58.5	59.5	60.5	62.0
	40			TWI<45		56.5	58.5	59.5	60.5	62.0
	45			TWI<50		56.0	58.0	59.0	60.0	62.0
	50				TWI	56.0	58.0	59.0	60.0	62.0

1-3) Low temperature release control

A heat pump operation is performed as shown in the table below according to the TC sensor detecting temperature.

•For the detected temperature, TC = TWO of a heat pump operation is used. The values of T7 through T10 varies depending on TWI. (See the table below)

•If the compressor frequency instruction from the hydro unit is less then 10 Hz, the compressor stops.

•TC < 3°C causes the compressor to stop abnormally. When the compressor restarts when 140 seconds has passed after the stop and TC < 3°C is not detected for 20 minutes, the abnormal stop counter is cleared. 10 times

of compressor abnormal stop stops the operation of heat pump, and confirms the abnormality (Display: A11). * If the heat pump operation is switched to other operation, the abnormality detection counter is reset to 0.

TC (TWO)

S (normal)

Zone

Control operation

T7

R1

R1

Increase compressor frequency by 1.2 Hz every

60 secs.

R2 (slow up)

T8

(slow up)

R2

Increase compressor frequency by 0.6 Hz every

Q (keep)

60 secs.

T9

O

Decrease compressor frequency to 70% every

P (slow down)

10 secs.

T10

P

Decrease compressor frequency by 3 Hz every

O (down)

T11

10 secs.

Forcible stop

Q

Keep compressor frequency.

TC=TWO

(°C)

TWI

T7

T8

T9

T10

T11

TWI<10

10.0

8.0

6.0

4.0

3.0

10

TWI<15

10.5

8.5

6.5

4.5

3.0

15

TWI<20

11.0

9.0

7.0

5.0

3.0

20

TWI

11.5

9.5

7.5

5.5

3.0

49