Sanyo SAP-CMRV1926EH, SAP-CMRV1426EH-F service manual 1/f fluctuation fan, Fig

(1/f fluctuation fan)

	Control/conditions	Unit operation	Explanation
SENSOR	The ON/OFF operation	The operation lamp illuminates.	The outdoor unit does not operate for 3 minutes
DRY	button on the remote	The indoor fan operates at the set fan speed.	even after the breaker is turned ON.
	controller is pressed.	The outdoor unit stops.
		The outdoor unit starts.	The frequency is increased at the rate of 0.5
			Hz every 1 seconds.
		(Compressor and the outdoor fan start.)
		When the frequency reaches Hz,	This is in order to stabilize the return of oil to the
		frequency increases are stopped for a period	compressor.
		of seconds. (Refer to Table 2.)
		The frequency then increases.	If the indoor and outdoor temperatures are high,
			the current peak cut-off activates, stopping
			any increases in frequency.
	The room temperature	DRY operation starts	Operating frequency is stabilized in order to
	reaches the desired		maintain a comfortable environment.
	temperature, and there	DRY A operation
	is no need for further
	cooling.	The indoor fan changes between "Low"	Operates to effectively dehumidify the air while
		and "LL" (very low) over a 6-minute cycle.	not excessively reducing the indoor
		This is 1/f fluctuation fan operation.	temperature.
		(Refer to Fig. 2.)	The indoor unit operates at 1/f fluctuation fan
			operation, at a fan speed that does not cause
			a chilly feeling.
	The room temperature is	DRY B operation
	15 °C or higher, and is	(1) The indoor fan changes between "Low"	The compressor operates on a 3-minutes ON,
	slightly too cold.
		and "LL" (very low) over a 6-minute cycle.	6-minutes OFF cycle, to prevent the room
		This is 1/f fluctuation fan operation.	temperature from dropping too much.
		(2) After appoximately 3 minutes, the
		compressor turns OFF, the outdoor fan
		turns OFF, and the indoor fan turns OFF.
		(3) After approximately 6 minutes, the
		conditions return to (1).
	The room temperature is	Monitoring operation begins.	When monitoring operation begins, the
	below 15 °C.		compressor stops, and the indoor fan operates at
			"LL" (very low) speed.

1/f fluctuation fan

250

200

150

(Step)

100

50

0

6-minute cycle

Fig. 2

67