Toshiba RAV-SM2244AT7 Outdoor fan revolution number control, 50, Cooling fan control

3.Outdoor fan revolution number control

Control of fan revolution number and the fan taps in this unit are shown below.

Fan Taps Revolution number Allocation [rpm]

		W1	W2	W3	W4	W5	W6	W7	W8	W9	WA	WB	WC	WD	WE	WF
SM224	Upper Fan	250	280	280	310	340	400	460	520	580	640	710	760	830	860	920
	Lower Fan	0	0	250	270	300	350	410	470	530	590	640	710	770	810	850
SM280	Upper Fan	250	280	280	340	400	460	520	580	640	710	760	830	860	920	940
	Lower Fan	0	0	250	300	350	410	470	530	590	640	710	770	810	850	920

3-1. Cooling fan control

1)Cooling operations of the outdoor fan are controlled by a TL sensor, TO sensor and the compressor revolution number. Control is performed per 1 tap of DC fan control.

The outdoor fan is controlled by every 1 tap of DC fan control (14 taps).

During startup, operation is fixed for 60 seconds to a maximum fan tap corresponding to the zones shown in the table below. Thereafter fan tap is controlled by a temperature outputted from the TL sensor.

		Less than 45 rps		45 rps or more		60 rps or more		TL (˚C)
				and less than 60 rps
								58
		Min.	Max.	Min.	Max.	Min.	Max.			WF tap
								55
38°C ≤ TO		W6	WE	W8	WF	WA	WF
29°C ≤ TO < 38°C		W5	WD	W7	WF	W9	WF
15 ≤ TO < 29°C		W3	WA	W5	WC	W7	WE		(	+1 tap / 20 sec.	)
										Until Maximum rps
5 ≤	TO < 15°C	W2	W8	W4	WA	W6	WC
										in each zone
0 ≤	TO < 5°C	W1	W6	W3	W8	W4	WA
								37
–5 ≤ TO < 0°C		W1	W5	W2	W7	W3	W8		Revolution number HOLD
								34
TO < –5°C		W1	W4	W3	W5	W3	W6
									(	–1 tap / 20 sec.	)
TO error		W1	WE	W3	WF	W3	WF			Until Minimum rps
										in each zone

3-2 Heating fan control

1)Heating operations of the outdoor fan are controlled by a TE sensor, TO sensor and the compressor revolution number.

(Control from a minimum W1 to a maximum is performed according to the table below).

2)Operation is fixed for 3 minutes after start up by a maximum fan tap corresponding to the zones in the table below. Thereafter fan control is performed using the temperature from the TE sensor.

3)When TE ≥ 24°C continues for 5 minutes, the compressor is stopped. The compressor is placed in the same state as a normal thermostat OFF without an error display.

The compressor is restarted after approximately 2 minutes 30 seconds and such interrupted operation does not constitute an error. When the operation in 3) above is frequently performed, the filter of the intake section of the indoor unit may require cleaning.

Therefore restart operation after cleaning the filter.

			Less than	45 rps or more	60 rps
			45 rps	and less than 60 rps	or more
	10°C ≤ TO		WA	WB	WC
	5 ≤ TO < 10°C		WC	WD	WF
Maximum	–3 ≤	TO < 5°C	WF	WF	WF
	–10	≤ TO < –3°C	WF	WF	WF
	TO < –10°C		WF	WF	WF
	TO error		WF	WF	WF

TE (˚C)

–2 taps / 20 sec. Stop timer count (Until W1)

24

–2 taps / 20 sec.

(Until W1)

21

–1 tap / 20 sec.

(Until W1)

18

Revolution number HOLD

15

+1 tap / 20 sec.

– 50 –